Pub Date : 2020-11-26DOI: 10.5252/geodiversitas2020v42a27
U. K. Tekin, L. Krystyn, C. Okuyucu, Yavuz Bedi, Kaan Sayıt
ABSTRACT The Mersin Mélange (northwest of Mersin city) includes a variety of large sedimentary blocks/tectonic slices of Palaeozoic and Mesozoic origins. Of these, the latter represents facial and tectonostratigraphic counterparts of the Beysehir-Hoyran Nappes (remnants of the northern Neotethys). The Tavuscayiri Block, located at the center of the mélange and close to the Orbuklukeli hill, is one of such Mesozoic occurrences, with a continuous pelagic sequence from the Upper Triassic to Lower Jurassic. At the Orbuklukeli hill, a succession of middle Norian to Toarcian age has been precisely dated, which starts with conodont assemblages for the Norian and Rhaetian and includes radiolarians for the upper Rhaetian. An acidic tuff layer corresponds to the T-J boundary, which passes above to an increasingly dominating chert-bearing limestone series, marking a gradually deepening-upward of the sequence. The early Hettangian radiolarians are poorly represented, but diverse and well-preserved radiolarians have been retrieved from the middle Hettangian to the Pliensbachian. A total of eighty-five taxa, including fourteen new species, have been determined. In addition to these, one new genus (Praeudalia Tekin, n. gen.) has been described from the Rhaetian part of the section. The top of the section is represented by nodular limestones in Ammonitico rosso facies, including a diverse Toarcian ammonite fauna. All lithologies of the Orbuklukeli section along the Tavuscayiri Block can be correlated with the previously described lithologies of the Kayabasi Group/Formation in the Bozkir Unit, and Gülbahar/Gümüslü units in the Lycian Nappes.
{"title":"Late Triassic to Early Jurassic radiolarian, conodont and ammonite assemblages from the Tavuscayiri block, Mersin Mélange, southern Turkey: Time constraints for the T/J boundary and sedimentary evolution of the southern margin of the northern Neotethys","authors":"U. K. Tekin, L. Krystyn, C. Okuyucu, Yavuz Bedi, Kaan Sayıt","doi":"10.5252/geodiversitas2020v42a27","DOIUrl":"https://doi.org/10.5252/geodiversitas2020v42a27","url":null,"abstract":"ABSTRACT The Mersin Mélange (northwest of Mersin city) includes a variety of large sedimentary blocks/tectonic slices of Palaeozoic and Mesozoic origins. Of these, the latter represents facial and tectonostratigraphic counterparts of the Beysehir-Hoyran Nappes (remnants of the northern Neotethys). The Tavuscayiri Block, located at the center of the mélange and close to the Orbuklukeli hill, is one of such Mesozoic occurrences, with a continuous pelagic sequence from the Upper Triassic to Lower Jurassic. At the Orbuklukeli hill, a succession of middle Norian to Toarcian age has been precisely dated, which starts with conodont assemblages for the Norian and Rhaetian and includes radiolarians for the upper Rhaetian. An acidic tuff layer corresponds to the T-J boundary, which passes above to an increasingly dominating chert-bearing limestone series, marking a gradually deepening-upward of the sequence. The early Hettangian radiolarians are poorly represented, but diverse and well-preserved radiolarians have been retrieved from the middle Hettangian to the Pliensbachian. A total of eighty-five taxa, including fourteen new species, have been determined. In addition to these, one new genus (Praeudalia Tekin, n. gen.) has been described from the Rhaetian part of the section. The top of the section is represented by nodular limestones in Ammonitico rosso facies, including a diverse Toarcian ammonite fauna. All lithologies of the Orbuklukeli section along the Tavuscayiri Block can be correlated with the previously described lithologies of the Kayabasi Group/Formation in the Bozkir Unit, and Gülbahar/Gümüslü units in the Lycian Nappes.","PeriodicalId":55111,"journal":{"name":"Geodiversitas","volume":"42 1","pages":"493 - 537"},"PeriodicalIF":1.8,"publicationDate":"2020-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45430155","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-11-05DOI: 10.5252/geodiversitas2020v42a26
D. Uhl, A. Jasper, M. Wuttke
ABSTRACT Uhl D., Jasper A. & Wuttke M. 2020. — Anatomical preservation of silicified corylites J.S.Gardner leaves from the Paleocene maar lake of Menat (Puy-de-Dôme, France). geodiversitas 42 (26): 485-492. http://geodiversitas.com/42/26 The late Paleocene fossil lagerstätte Menat in France is well known for its wealth of excellently preserved fossil plants and insects. Although the flora from this locality is regarded as characteristic for the late Thanetian in Western and Central Europe, there is a noteworthy lack of modern paleobotanical studies on this locality. The few existing studies on plant megafossils utilized only the gross morphology of leaves and carpological material for taxonomic questions, whereas anatomical data (i.e. from cuticles and permineralizations) have been completely neglected. The present study provides the first data on anatomically preserved internal tissues of leaves assigned to Corylites macquarrii (Forbes) Heer from this locality. Cell walls are preserved as silicates, whereas cell lumina are mostly empty. On occasion, cell lumina are filled with foam-like, porous silica. Anatomical preservation of these tissues is probably related to early diagenetic silicification of plant cell walls. Although at the moment nothing can be said about the source of the SiO2 it is likely that it is related to the volcanic origin of the Menat maar and/or volcanic activities in the vicinity of the lake during deposition of the sediments.
{"title":"Anatomical preservation of silicified Corylites J.S.Gardner leaves from the Paleocene maar lake of Menat (Puy-de-Dôme, France)","authors":"D. Uhl, A. Jasper, M. Wuttke","doi":"10.5252/geodiversitas2020v42a26","DOIUrl":"https://doi.org/10.5252/geodiversitas2020v42a26","url":null,"abstract":"ABSTRACT Uhl D., Jasper A. & Wuttke M. 2020. — Anatomical preservation of silicified corylites J.S.Gardner leaves from the Paleocene maar lake of Menat (Puy-de-Dôme, France). geodiversitas 42 (26): 485-492. http://geodiversitas.com/42/26 The late Paleocene fossil lagerstätte Menat in France is well known for its wealth of excellently preserved fossil plants and insects. Although the flora from this locality is regarded as characteristic for the late Thanetian in Western and Central Europe, there is a noteworthy lack of modern paleobotanical studies on this locality. The few existing studies on plant megafossils utilized only the gross morphology of leaves and carpological material for taxonomic questions, whereas anatomical data (i.e. from cuticles and permineralizations) have been completely neglected. The present study provides the first data on anatomically preserved internal tissues of leaves assigned to Corylites macquarrii (Forbes) Heer from this locality. Cell walls are preserved as silicates, whereas cell lumina are mostly empty. On occasion, cell lumina are filled with foam-like, porous silica. Anatomical preservation of these tissues is probably related to early diagenetic silicification of plant cell walls. Although at the moment nothing can be said about the source of the SiO2 it is likely that it is related to the volcanic origin of the Menat maar and/or volcanic activities in the vicinity of the lake during deposition of the sediments.","PeriodicalId":55111,"journal":{"name":"Geodiversitas","volume":"42 1","pages":"485 - 492"},"PeriodicalIF":1.8,"publicationDate":"2020-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46506998","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-10-22DOI: 10.5252/geodiversitas2020v42a25
France de Lapparent de Broin, L. Chirio, R. Bour
ABSTRACT We describe the skull of Ragechelus sahelica, n. gen., n. sp., a pleurodiran Pelomedusoides turtle, the oldest skull known of the Erymnochelyinae. The specimen comes from the surroundings of Indamane village, from a littoral late Maastrichtian level of the Iullemeden sedimentary basin (southwestern Niger, Africa). It is compared on the one hand to the members of the subfamily including remains from the neighboring Ibeceten locality, but from an underlying continental Senonian, and, on the other hand, particularly to the bothremydid Nigeremys gigantea (Bergounioux & Crouzel, 1968), from a littoral Maastrichtian level close to that of Indamane, and from a closer to Indamane locality than Ibeceten. The associated fauna is reviewed in its stratigraphic context. Palaeogeographic considerations and systematic relationships indicate Erymnochelyinae widely diversified, in Africa from that time onwards, up to these days in Madagascar and notably with incursions in Western Europe during the Eocene times.
{"title":"The oldest erymnochelyine turtle skull, Ragechelus sahelica n. gen., n. sp., from the Iullemmeden basin, Upper Cretaceous of Africa, and the associated fauna in its geographical and geological context","authors":"France de Lapparent de Broin, L. Chirio, R. Bour","doi":"10.5252/geodiversitas2020v42a25","DOIUrl":"https://doi.org/10.5252/geodiversitas2020v42a25","url":null,"abstract":"ABSTRACT We describe the skull of Ragechelus sahelica, n. gen., n. sp., a pleurodiran Pelomedusoides turtle, the oldest skull known of the Erymnochelyinae. The specimen comes from the surroundings of Indamane village, from a littoral late Maastrichtian level of the Iullemeden sedimentary basin (southwestern Niger, Africa). It is compared on the one hand to the members of the subfamily including remains from the neighboring Ibeceten locality, but from an underlying continental Senonian, and, on the other hand, particularly to the bothremydid Nigeremys gigantea (Bergounioux & Crouzel, 1968), from a littoral Maastrichtian level close to that of Indamane, and from a closer to Indamane locality than Ibeceten. The associated fauna is reviewed in its stratigraphic context. Palaeogeographic considerations and systematic relationships indicate Erymnochelyinae widely diversified, in Africa from that time onwards, up to these days in Madagascar and notably with incursions in Western Europe during the Eocene times.","PeriodicalId":55111,"journal":{"name":"Geodiversitas","volume":"42 1","pages":"455 - 484"},"PeriodicalIF":1.8,"publicationDate":"2020-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47015210","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-10-15DOI: 10.5252/geodiversitas2020v42a24
Andrey V. Zhuravlev
ABSTRACT An isotopic investigation of organic matter of the Late Devonian-Carboniferous (Mississippian) conodont elements of various morphology was carried out. δ13Corg values of conodont elements measured in this study range from -32.6‰ to -22.4‰, with an average value of –26.1 ± 4.8‰. The study taxa represent four types of conodont apparatus, which differ one from another by morphology of P1 elements. In spite of apparently different morphology all the studied conodonts possess close δ13Corg values. Taxonomic control on the carbon isotope composition is insufficient as well. High consistency of the carbon isotope composition of conodont organic matter suggests that the Late Devonian and Carboniferous (Mississippian) conodonts occupied similar trophic levels. Quite low δ13Corg values in conodont organic matter allow supposing that conodonts were low level consumers, probably seston and plankton feeders.
{"title":"Trophic position of some Late Devonian-Carboniferous (Mississippian) conodonts revealed on carbon organic matter isotope signatures: a case study of the East European basin","authors":"Andrey V. Zhuravlev","doi":"10.5252/geodiversitas2020v42a24","DOIUrl":"https://doi.org/10.5252/geodiversitas2020v42a24","url":null,"abstract":"ABSTRACT An isotopic investigation of organic matter of the Late Devonian-Carboniferous (Mississippian) conodont elements of various morphology was carried out. δ13Corg values of conodont elements measured in this study range from -32.6‰ to -22.4‰, with an average value of –26.1 ± 4.8‰. The study taxa represent four types of conodont apparatus, which differ one from another by morphology of P1 elements. In spite of apparently different morphology all the studied conodonts possess close δ13Corg values. Taxonomic control on the carbon isotope composition is insufficient as well. High consistency of the carbon isotope composition of conodont organic matter suggests that the Late Devonian and Carboniferous (Mississippian) conodonts occupied similar trophic levels. Quite low δ13Corg values in conodont organic matter allow supposing that conodonts were low level consumers, probably seston and plankton feeders.","PeriodicalId":55111,"journal":{"name":"Geodiversitas","volume":"42 1","pages":"443 - 453"},"PeriodicalIF":1.8,"publicationDate":"2020-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44816400","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-10-01DOI: 10.5252/geodiversitas2020v42a23
Ü. Akkemik, Dimitra V. Mantzouka, D. Yildirim
ABSTRACT A new fossil pine species from eastern Turkey is described and its botanical affinities are discussed. The sample was collected from the city of Kemaliye, Erzincan province, Turkey, and derives from the early-middle Miocene Divriği formation. Transverse, tangential and radial sections were taken from the petrified wood, and its palaeoxylotomical features were investigated. Based on its anatomical features including idioblastic cells in rays a new fossil-species of the genus Lesbosoxylon Süss & Velitzelos was identified as Lesbosoxylon kemaliyensis Akkemik & Mantzouka, sp. nov. Diagnostic features of the new species are: Transition from earlywood to latewood mostly gradual; axial and radial resin canals with thin-walled epithelial cells present; latewood tracheids thin to thick walled; bordered pits on radial walls of tracheids 1-2(-3) seriate; crassulae common; rays heterocellular, uniseriate, partly biseriate; uniseriate rays up to 27 cells high; fusiform rays up to 30 cells high; axial parenchyma occasionally present; ray tracheids 2-3 rows; cell walls of ray tracheids smooth; cross-field pitting pinoid, 1-2(-6) pits per cross-field. Detailed investigation of the botanical affinities of the new fossil wood suggested that the most closely related modern species is Pinus canariensis C. Sm in Buch, a relict species from the Canary Islands.
摘要描述了土耳其东部一种新的松树化石，并讨论了其植物学亲缘关系。该样品采集自土耳其埃尔津詹省的Kemaliye市，来自中新世早中期Divriği组。从石化木材上取横向、切向和径向切片，研究其古氧切分学特征。根据其解剖学特征，包括射线中的异母细胞，鉴定为Lesbosoxylon s & Velitzelos属的一个新化石种为Lesbosoxylon kemaliyensis Akkemik & Mantzouka, sp. 11 .新种的诊断特征是:从早期木材到晚期木材的过渡基本是渐进的;轴向和径向的树脂管中有薄壁上皮细胞;晚木管胞薄到厚壁;管胞1-2(-3)序列化的在径向壁上有棱的凹坑;crassulae普遍;射线异质细胞，单胚芽，部分双胚芽;单一射线高达27个细胞高;梭状射线高达30个细胞高;偶有轴向薄壁;射线管胞2-3排;射线管胞细胞壁光滑;交叉场点蚀曲线，每个交叉场1-2(-6)个点。对新化石木材的植物学亲缘关系的详细调查表明，最接近的现代物种是布赫的加那利松(Pinus canariensis C. Sm)，一种来自加那利群岛的遗留种。
{"title":"The first report of Lesbosoxylon Süss & Velitzelos from the early-middle Miocene of eastern Anatolia","authors":"Ü. Akkemik, Dimitra V. Mantzouka, D. Yildirim","doi":"10.5252/geodiversitas2020v42a23","DOIUrl":"https://doi.org/10.5252/geodiversitas2020v42a23","url":null,"abstract":"ABSTRACT A new fossil pine species from eastern Turkey is described and its botanical affinities are discussed. The sample was collected from the city of Kemaliye, Erzincan province, Turkey, and derives from the early-middle Miocene Divriği formation. Transverse, tangential and radial sections were taken from the petrified wood, and its palaeoxylotomical features were investigated. Based on its anatomical features including idioblastic cells in rays a new fossil-species of the genus Lesbosoxylon Süss & Velitzelos was identified as Lesbosoxylon kemaliyensis Akkemik & Mantzouka, sp. nov. Diagnostic features of the new species are: Transition from earlywood to latewood mostly gradual; axial and radial resin canals with thin-walled epithelial cells present; latewood tracheids thin to thick walled; bordered pits on radial walls of tracheids 1-2(-3) seriate; crassulae common; rays heterocellular, uniseriate, partly biseriate; uniseriate rays up to 27 cells high; fusiform rays up to 30 cells high; axial parenchyma occasionally present; ray tracheids 2-3 rows; cell walls of ray tracheids smooth; cross-field pitting pinoid, 1-2(-6) pits per cross-field. Detailed investigation of the botanical affinities of the new fossil wood suggested that the most closely related modern species is Pinus canariensis C. Sm in Buch, a relict species from the Canary Islands.","PeriodicalId":55111,"journal":{"name":"Geodiversitas","volume":"42 1","pages":"427 - 441"},"PeriodicalIF":1.8,"publicationDate":"2020-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48158726","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-09-17DOI: 10.5252/geodiversitas2020v42a22
France de Lapparent de Broin, S. Bailon, M. Augé, J. Rage
ABSTRACT Amphibians and reptiles are decribed for the first time from the Cenozoic of Afghanistan. They originate from four Neogene localities. Sherullah 9 (late Miocene) yielded anuran amphibians (? Alytidae Fitzinger, 1843 (? Discoglossinae Günther, 1858), “Ranidae” Batsch, 1796 and another, indeterminate family), one chelonian, the terrestrial testudinine Agrionemys Khozatsky & Młynarski, 1966, which is compared to a Maragheh fossil specimen, and the genus still being present in the Kabul area; one indeterminate lizard, snakes (Colubridae Oppel, 1811 s.l. and two distinct snakes that pertain to either the Colubridae s.l. or Elapidae Boie, 1827). The faunas of the three other localities are very poor. Molayan (late Miocene) produced only one lizard (Varanus sp. Merrem, 1820, Varanidae Gray, 1827). Pul-E Charkhi (early Pliocene) yielded indeterminate anurans, one indetermined lizard and colubrid snakes. Only an indeterminate anuran family is known at Hadji Rona (early Pliocene). Then, as known, the fauna is constituted of families which still have representatives living in Afghanistan.
{"title":"Amphibians and reptiles from the Neogene of Afghanistan","authors":"France de Lapparent de Broin, S. Bailon, M. Augé, J. Rage","doi":"10.5252/geodiversitas2020v42a22","DOIUrl":"https://doi.org/10.5252/geodiversitas2020v42a22","url":null,"abstract":"ABSTRACT Amphibians and reptiles are decribed for the first time from the Cenozoic of Afghanistan. They originate from four Neogene localities. Sherullah 9 (late Miocene) yielded anuran amphibians (? Alytidae Fitzinger, 1843 (? Discoglossinae Günther, 1858), “Ranidae” Batsch, 1796 and another, indeterminate family), one chelonian, the terrestrial testudinine Agrionemys Khozatsky & Młynarski, 1966, which is compared to a Maragheh fossil specimen, and the genus still being present in the Kabul area; one indeterminate lizard, snakes (Colubridae Oppel, 1811 s.l. and two distinct snakes that pertain to either the Colubridae s.l. or Elapidae Boie, 1827). The faunas of the three other localities are very poor. Molayan (late Miocene) produced only one lizard (Varanus sp. Merrem, 1820, Varanidae Gray, 1827). Pul-E Charkhi (early Pliocene) yielded indeterminate anurans, one indetermined lizard and colubrid snakes. Only an indeterminate anuran family is known at Hadji Rona (early Pliocene). Then, as known, the fauna is constituted of families which still have representatives living in Afghanistan.","PeriodicalId":55111,"journal":{"name":"Geodiversitas","volume":"42 1","pages":"409 - 426"},"PeriodicalIF":1.8,"publicationDate":"2020-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49452089","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-09-01DOI: 10.5252/geodiversitas2020v42a21
M. Forel, T. Kolar-Jurkovšek, B. Jurkovšek
ABSTRACT The taxonomy of marine ostracod assemblages from Belca section in the Karavanke Mountains, northwestern Slovenia, is discussed, adding to the scientific understanding of marine ostracods during the Carnian stage, Late Triassic. In Belca, the ostracod assemblages include 39 species, among which two are newly described: Dicerobairdia buseri Forel, n. sp. and Pontocypris? karavankensis Forel, n. sp. The recovery of abundant juvenile and adult specimens facilitated the illustration and discussion of the ontogenetic series of several typically Triassic species including Renngartenella sanctaecrucis Kris-tan-Tollmann in Kristan-Tollmann & Hamedani, 1973, Leviella bogschi Kozur, 1972 and Leviella veghae Kozur, 1972. The occurrence of sexual dimorphism is furthermore confirmed for Renngartenella sanctaecrucis. Ostracods in Belca record a major shift from low diversity and high dominance assemblages at the base of the section to higher diversity and lower dominance with diversification of stable open-marine taxa in the upper part. This pattern might illustrate low salinity levels related to high land-derived input at the base of the section and a return to relatively normal marine salinity in the intermediate sublittoral zone in the upper portion of Belca section.
{"title":"Ostracods from the ‘Raibl Beds’ (Carnian, Late Triassic) of Belca section in Karavanke Mountains, northwestern Slovenia","authors":"M. Forel, T. Kolar-Jurkovšek, B. Jurkovšek","doi":"10.5252/geodiversitas2020v42a21","DOIUrl":"https://doi.org/10.5252/geodiversitas2020v42a21","url":null,"abstract":"ABSTRACT The taxonomy of marine ostracod assemblages from Belca section in the Karavanke Mountains, northwestern Slovenia, is discussed, adding to the scientific understanding of marine ostracods during the Carnian stage, Late Triassic. In Belca, the ostracod assemblages include 39 species, among which two are newly described: Dicerobairdia buseri Forel, n. sp. and Pontocypris? karavankensis Forel, n. sp. The recovery of abundant juvenile and adult specimens facilitated the illustration and discussion of the ontogenetic series of several typically Triassic species including Renngartenella sanctaecrucis Kris-tan-Tollmann in Kristan-Tollmann & Hamedani, 1973, Leviella bogschi Kozur, 1972 and Leviella veghae Kozur, 1972. The occurrence of sexual dimorphism is furthermore confirmed for Renngartenella sanctaecrucis. Ostracods in Belca record a major shift from low diversity and high dominance assemblages at the base of the section to higher diversity and lower dominance with diversification of stable open-marine taxa in the upper part. This pattern might illustrate low salinity levels related to high land-derived input at the base of the section and a return to relatively normal marine salinity in the intermediate sublittoral zone in the upper portion of Belca section.","PeriodicalId":55111,"journal":{"name":"Geodiversitas","volume":"42 1","pages":"377 - 407"},"PeriodicalIF":1.8,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46626136","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-08-28DOI: 10.5252/geodiversitas2020v42a20
M. Ivanov, A. Čerňanský, I. Bonilla-Salomón, Àngel H. Luján
ABSTRACT Two fossiliferous karstic fissures from the Mokrá-Western Quarry, MWQ (1/2001 Turtle Joint; 2/2003 Reptile Joint) provided a diverse vertebrate fauna from the early Miocene (Burdigalian, MN 4) including squamates. The rather warm climatic conditions during the Miocene Thermal Maximum (17.8-17.7 Ma) enabled dispersal of thermophilic lizards and snakes throughout Central Europe. In total, ten major clades have been identified in MWQ localities, including: Lacertidae (Lacertidae indet., Lacertidae tooth morphotype 1 and 2); Amphisbaenia (Amphisbaenia indet.); ? Scincoidea (? Scincoidea indet.); Anguidae (Pseudopus laurillardi (Lartet, 1851), Pseudopus sp., Ophisaurus sp., and Anguinae indet.); Varanidae (Varanus mokrensis Ivanov, Klembara, Ruta & Böhme, 2018); Boidae (Bavarioboa cf. hermi Szyndlar & Schleich, 1993); Pythonidae (Python sp.); Colubridae (Colubridae gen. et sp. indet., Coluber [s.l.] sp., and “Colubrinae” indet., type 1), Natricidae (Natrix sp. and “Natricinae” indet.); Viperidae (Viperinae [‘Oriental vipers' group], Vipera sp. [‘European vipers' group]); and Elapidae (Elapidae gen. et sp. indet.). Python sp. from the MWQ represents the first known occurrence of this most thermophilic Neogene squamate taxon within the area of Central Paratethys and we assume that MAT did not fall below 18-19 °C in the vicinity of this locality during the late Burdigalian stage. These humid subtropical to paratropical climatic conditions, also documented by several full-aquatic and semi-aquatic amphibians and reptiles, were suitable for the occurrence of other thermophilic lizard and snake taxa reported from MWQ, including Varanus mokrensis, Pseudopus laurillardi, Bavarioboa, large Elapidae and ‘Oriental vipers'.
{"title":"Early Miocene squamate assemblage from the Mokrá-Western Quarry (Czech Republic) and its palaeobiogeographical and palaeoenvironmental implications","authors":"M. Ivanov, A. Čerňanský, I. Bonilla-Salomón, Àngel H. Luján","doi":"10.5252/geodiversitas2020v42a20","DOIUrl":"https://doi.org/10.5252/geodiversitas2020v42a20","url":null,"abstract":"ABSTRACT Two fossiliferous karstic fissures from the Mokrá-Western Quarry, MWQ (1/2001 Turtle Joint; 2/2003 Reptile Joint) provided a diverse vertebrate fauna from the early Miocene (Burdigalian, MN 4) including squamates. The rather warm climatic conditions during the Miocene Thermal Maximum (17.8-17.7 Ma) enabled dispersal of thermophilic lizards and snakes throughout Central Europe. In total, ten major clades have been identified in MWQ localities, including: Lacertidae (Lacertidae indet., Lacertidae tooth morphotype 1 and 2); Amphisbaenia (Amphisbaenia indet.); ? Scincoidea (? Scincoidea indet.); Anguidae (Pseudopus laurillardi (Lartet, 1851), Pseudopus sp., Ophisaurus sp., and Anguinae indet.); Varanidae (Varanus mokrensis Ivanov, Klembara, Ruta & Böhme, 2018); Boidae (Bavarioboa cf. hermi Szyndlar & Schleich, 1993); Pythonidae (Python sp.); Colubridae (Colubridae gen. et sp. indet., Coluber [s.l.] sp., and “Colubrinae” indet., type 1), Natricidae (Natrix sp. and “Natricinae” indet.); Viperidae (Viperinae [‘Oriental vipers' group], Vipera sp. [‘European vipers' group]); and Elapidae (Elapidae gen. et sp. indet.). Python sp. from the MWQ represents the first known occurrence of this most thermophilic Neogene squamate taxon within the area of Central Paratethys and we assume that MAT did not fall below 18-19 °C in the vicinity of this locality during the late Burdigalian stage. These humid subtropical to paratropical climatic conditions, also documented by several full-aquatic and semi-aquatic amphibians and reptiles, were suitable for the occurrence of other thermophilic lizard and snake taxa reported from MWQ, including Varanus mokrensis, Pseudopus laurillardi, Bavarioboa, large Elapidae and ‘Oriental vipers'.","PeriodicalId":55111,"journal":{"name":"Geodiversitas","volume":"42 1","pages":"343 - 376"},"PeriodicalIF":1.8,"publicationDate":"2020-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49182763","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-07-23DOI: 10.5252/geodiversitas2020v42a19
L. D. Bonis, L. Werdelin
Stéphane Peigné nous a quittés le 4 Décembre 2017 après avoir lutté avec courage pendant des mois contre une terrible maladie. Il avait espéré l'avoir vaincue en 2016 mais elle l'a rattrapé inexorablement. Il était né en 1973 dans une petite commune de l'Est de la France et avait suivi sa scolarité dans la région jusqu'à son Baccalauréat. Il commença des études supérieures à l'université de Nancy, dans un cursus en Sciences de la Nature et de la Vie, pour les poursuivre à l'Université de Bourgogne par une licence de Biologie suivie d'une maîtrise d'Écologie. Cependant cette orientation vers la recherche en biologie évolutive et écologique ne lui suffisait plus et, désireux d'inclure le temps dans les processus évolutifs, il décida de bifurquer vers la paléontologie, en particulier celle des vertébrés, en s'inscrivant au Diplôme d'Études Approfondies (DEA) en Paléontologie de l'Université de Montpellier. C'est ce changement de direction qui lui permit de rencontrer Thanh Thuyh Nguyen Tu, sa future épouse et mère de ses deux enfants. Il s'orienta ensuite en 1996 vers l'Université de Poitiers pour commencer, sous la direction de l'un de nous (LdeB) une thèse qu'il termina avec succès en 2000. C'est aussi à Poitiers qu'il obtint, 10 ans plus tard, son Habilitation à Diriger des Recherches (HDR).
Stéphane Peigné在与一种可怕的疾病进行了数月的勇敢斗争后，于2017年12月4日去世。他曾希望在2016年击败她，但她无情地赶上了他。他于1973年出生于法国东部的一个小镇，并在该地区接受教育，直到获得学士学位。他开始在南希大学（University of Nancy）攻读自然和生命科学学位，随后在勃艮第大学（University of Bourgogne）攻读生物学学士学位和生态学硕士学位。然而，这种对进化和生态生物学研究的关注对他来说已经不够了，为了将时间纳入进化过程，他决定通过参加蒙彼利埃本科的古生物学高级研究文凭（DEA），转向古生物学，特别是脊椎动物学。正是这种方向的改变使他认识了Thanh Thuyh Nguyen Tu，他未来的妻子和两个孩子的母亲。1996年，他前往普瓦捷大学，在我们中的一位（LDEB）的指导下开始了一篇论文，并于2000年成功完成。也是在普瓦捷，10年后，他获得了指导研究（HDR）的资格。
{"title":"Stéphane Peigné (1973-2017) – Nécrologie","authors":"L. D. Bonis, L. Werdelin","doi":"10.5252/geodiversitas2020v42a19","DOIUrl":"https://doi.org/10.5252/geodiversitas2020v42a19","url":null,"abstract":"Stéphane Peigné nous a quittés le 4 Décembre 2017 après avoir lutté avec courage pendant des mois contre une terrible maladie. Il avait espéré l'avoir vaincue en 2016 mais elle l'a rattrapé inexorablement. Il était né en 1973 dans une petite commune de l'Est de la France et avait suivi sa scolarité dans la région jusqu'à son Baccalauréat. Il commença des études supérieures à l'université de Nancy, dans un cursus en Sciences de la Nature et de la Vie, pour les poursuivre à l'Université de Bourgogne par une licence de Biologie suivie d'une maîtrise d'Écologie. Cependant cette orientation vers la recherche en biologie évolutive et écologique ne lui suffisait plus et, désireux d'inclure le temps dans les processus évolutifs, il décida de bifurquer vers la paléontologie, en particulier celle des vertébrés, en s'inscrivant au Diplôme d'Études Approfondies (DEA) en Paléontologie de l'Université de Montpellier. C'est ce changement de direction qui lui permit de rencontrer Thanh Thuyh Nguyen Tu, sa future épouse et mère de ses deux enfants. Il s'orienta ensuite en 1996 vers l'Université de Poitiers pour commencer, sous la direction de l'un de nous (LdeB) une thèse qu'il termina avec succès en 2000. C'est aussi à Poitiers qu'il obtint, 10 ans plus tard, son Habilitation à Diriger des Recherches (HDR).","PeriodicalId":55111,"journal":{"name":"Geodiversitas","volume":"42 1","pages":"327 - 342"},"PeriodicalIF":1.8,"publicationDate":"2020-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46466533","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-07-16DOI: 10.5252/geodiversitas2020v42a18
Morgane Fournier, Sandrine Ladevèze, Kévin Le Verger, V. Fischer, R. Speijer, F. Solé
ABSTRACT The Paleogene mammals of Europe are rarely known from partial or complete skeletons. As a result, their systematics and ecology are often solely based on dental characters and postcranial remains, when available, are usually neglected. This explains why the locomotion of mammals of the Eocene-Oligocene transition, the “Grande Coupure”, is poorly known. The aim of this study is to describe the tarsal bones (astragali and calcanei) and characterize the locomotion of amphicyonid carnivorans, one of the most abundant mammalian predator groups from the Phosphorites du Quercy (France) sites. The identification of taxa and the characterization of both posture and locomotion were carried out using four criteria: relative abundance (in comparison with dental data), morphology, size, and body mass. Seven morphotypes, four among astragali and three among calcanei, are identified as Amphicyonidae and show various postures: plantigrade, semi-digitigrade, and digitigrade. One morphotype of the astragalus and one of the calcaneus are identified as Cynodictis lacustris Gervais, 1852, which exhibits a digitigrade posture. The study of postcranial bones, such as tarsals, allows for a better understanding of the ecology of these animals and deserves more interest in future morphological and phylogenetic studies.
{"title":"On the morphology of the astragalus and calcaneus of the amphicyonids (Carnivora, Mammalia) from the Paleogene of Europe: implications for the ecology of the European bear-dogs","authors":"Morgane Fournier, Sandrine Ladevèze, Kévin Le Verger, V. Fischer, R. Speijer, F. Solé","doi":"10.5252/geodiversitas2020v42a18","DOIUrl":"https://doi.org/10.5252/geodiversitas2020v42a18","url":null,"abstract":"ABSTRACT The Paleogene mammals of Europe are rarely known from partial or complete skeletons. As a result, their systematics and ecology are often solely based on dental characters and postcranial remains, when available, are usually neglected. This explains why the locomotion of mammals of the Eocene-Oligocene transition, the “Grande Coupure”, is poorly known. The aim of this study is to describe the tarsal bones (astragali and calcanei) and characterize the locomotion of amphicyonid carnivorans, one of the most abundant mammalian predator groups from the Phosphorites du Quercy (France) sites. The identification of taxa and the characterization of both posture and locomotion were carried out using four criteria: relative abundance (in comparison with dental data), morphology, size, and body mass. Seven morphotypes, four among astragali and three among calcanei, are identified as Amphicyonidae and show various postures: plantigrade, semi-digitigrade, and digitigrade. One morphotype of the astragalus and one of the calcaneus are identified as Cynodictis lacustris Gervais, 1852, which exhibits a digitigrade posture. The study of postcranial bones, such as tarsals, allows for a better understanding of the ecology of these animals and deserves more interest in future morphological and phylogenetic studies.","PeriodicalId":55111,"journal":{"name":"Geodiversitas","volume":"42 1","pages":"305 - 325"},"PeriodicalIF":1.8,"publicationDate":"2020-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45281241","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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