Pub Date : 2022-02-17DOI: 10.5252/geodiversitas2022v44a8
Emmanuelle Stoetzel, M. Pickford
RÉSUMÉ La présente étude porte sur l'analyse d'un assemblage inédit de restes de microvertébrés récoltés en 1910 à Ben Kérat, dans le nord-est de l'Algérie. L'objectif principal de cette étude était d'évaluer le potentiel paléontologique du site, et de préciser son contexte géologique et chronologique. L'assemblage étudié obtenu à partir de plusieurs échantillons de brèche comprend 362 restes identifiés, appartenant à 44 individus et 11 taxons: six rongeurs appartenant aux genres Gerbillus Desmarest, 1804, Meriones Illiger, 1811, Paraethomys Petter, 1968, Mus Linnaeus, 1758, Praomys Thomas, 1915 et Ellobius Fischer, 1814, deux soricidés du genre Crocidura Wagler, 1832, un amphibien anoure, un lézard lacertidé et un serpent colubridé, indiquant un âge situé vers la fin du Pléistocène moyen. Bien que le spectre faunique global soit similaire à d'autres assemblages de sites maghrébins du Pléistocène moyen, les spécimens de Ben Kérat présentent des caractéristiques dentaires particulières, pouvant traduire soit une période d'amélioration climatique dans un contexte plus global d'aridification et de refroidissement croissant, soit une particularité régionale avec notamment des nouvelles formes de Paraethomys et de Mus ne s'insérant pas dans les lignées évolutives connues jusqu'ici en Afrique du Nord.
{"title":"Étude d'un assemblage original de microvertébrés du Pléistocène moyen du nord-est de l'Algérie (Ben Kérat, Oued Zenati) et description de deux nouveaux muridés","authors":"Emmanuelle Stoetzel, M. Pickford","doi":"10.5252/geodiversitas2022v44a8","DOIUrl":"https://doi.org/10.5252/geodiversitas2022v44a8","url":null,"abstract":"RÉSUMÉ La présente étude porte sur l'analyse d'un assemblage inédit de restes de microvertébrés récoltés en 1910 à Ben Kérat, dans le nord-est de l'Algérie. L'objectif principal de cette étude était d'évaluer le potentiel paléontologique du site, et de préciser son contexte géologique et chronologique. L'assemblage étudié obtenu à partir de plusieurs échantillons de brèche comprend 362 restes identifiés, appartenant à 44 individus et 11 taxons: six rongeurs appartenant aux genres Gerbillus Desmarest, 1804, Meriones Illiger, 1811, Paraethomys Petter, 1968, Mus Linnaeus, 1758, Praomys Thomas, 1915 et Ellobius Fischer, 1814, deux soricidés du genre Crocidura Wagler, 1832, un amphibien anoure, un lézard lacertidé et un serpent colubridé, indiquant un âge situé vers la fin du Pléistocène moyen. Bien que le spectre faunique global soit similaire à d'autres assemblages de sites maghrébins du Pléistocène moyen, les spécimens de Ben Kérat présentent des caractéristiques dentaires particulières, pouvant traduire soit une période d'amélioration climatique dans un contexte plus global d'aridification et de refroidissement croissant, soit une particularité régionale avec notamment des nouvelles formes de Paraethomys et de Mus ne s'insérant pas dans les lignées évolutives connues jusqu'ici en Afrique du Nord.","PeriodicalId":55111,"journal":{"name":"Geodiversitas","volume":"44 1","pages":"237 - 263"},"PeriodicalIF":1.8,"publicationDate":"2022-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46009433","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 : 2022-02-14DOI: 10.5252/geodiversitas2022v44a7
A. Villa, M. Delfino
ABSTRACT In the ‘50s of the XX century, a German expedition lead by Richard Dehm collected a large amount of fossil remains from northern Pakistan. Among these was an isolated trunk vertebra of a lizard, which is here referred to Varanus sp. The collecting site of this specimen is not precisely known, but it most likely comes from middle to early late Miocene Siwalik sediments of the Chinji Formation. This is the first published record of a fossil lizard from the Neogene of Pakistan and adds to the very patchy record of Varanus Merrem, 1820 in Asia. It further supports previous reconstructions of a warm climate for the middle to early late Miocene of the Siwaliks.
{"title":"First fossil of Varanus Merrem, 1820 (Squamata: Varanidae) from the Miocene Siwaliks of Pakistan","authors":"A. Villa, M. Delfino","doi":"10.5252/geodiversitas2022v44a7","DOIUrl":"https://doi.org/10.5252/geodiversitas2022v44a7","url":null,"abstract":"ABSTRACT In the ‘50s of the XX century, a German expedition lead by Richard Dehm collected a large amount of fossil remains from northern Pakistan. Among these was an isolated trunk vertebra of a lizard, which is here referred to Varanus sp. The collecting site of this specimen is not precisely known, but it most likely comes from middle to early late Miocene Siwalik sediments of the Chinji Formation. This is the first published record of a fossil lizard from the Neogene of Pakistan and adds to the very patchy record of Varanus Merrem, 1820 in Asia. It further supports previous reconstructions of a warm climate for the middle to early late Miocene of the Siwaliks.","PeriodicalId":55111,"journal":{"name":"Geodiversitas","volume":"44 1","pages":"229 - 235"},"PeriodicalIF":1.8,"publicationDate":"2022-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47163190","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 : 2022-02-10DOI: 10.5252/geodiversitas2022v44a6
À. Ossó, Cyril Gagnaison, Olivier Gain
ABSTRACT The access to a new collection of decapod crustaceans collected from the middle-late Miocene ‘Faluns’, and examination of new specimens available, have allowed to expand the previous compilations by Couffon (1908) and Ossó & Gagnaison (2019), elevating to nineteen the species reported, representatives of seventeen genera and fourteen families. Squat lobsters and parthenopid crabs are reported for the first time in the Atlantic Miocene of France. The expected presence of Xantho moldavicus (Yanakevich, 1977) and Lobocarcinus sismondai (von Meyer, 1843), hitherto known only by chelae, is confirmed herein. The status of Haydnella pulchellus (A. Milne-Edwards, 1864) is discussed. Moreover, the ventral features of Necronectes michelini (A. Milne-Edwards, 1861) are described for the first time. This decapod assemblage presents clear affinity with coeval decapod faunas from the Mediterranean and Paratethys realm, as evidenced by the presence of identical species such as Liocarcinus kuehni (Bachmayer, 1953) or Pilumnus mediterraneus (Lőrenthey, 1897), which is by far, the most common decapod in the ‘Faluns’ outcrops. Several different chelae and carapace remains are left in open nomenclature.
{"title":"A re-appraisal of the middle-late Miocene fossil decapod crustaceans of the ‘Faluns’ (Anjou-Touraine, France)","authors":"À. Ossó, Cyril Gagnaison, Olivier Gain","doi":"10.5252/geodiversitas2022v44a6","DOIUrl":"https://doi.org/10.5252/geodiversitas2022v44a6","url":null,"abstract":"ABSTRACT The access to a new collection of decapod crustaceans collected from the middle-late Miocene ‘Faluns’, and examination of new specimens available, have allowed to expand the previous compilations by Couffon (1908) and Ossó & Gagnaison (2019), elevating to nineteen the species reported, representatives of seventeen genera and fourteen families. Squat lobsters and parthenopid crabs are reported for the first time in the Atlantic Miocene of France. The expected presence of Xantho moldavicus (Yanakevich, 1977) and Lobocarcinus sismondai (von Meyer, 1843), hitherto known only by chelae, is confirmed herein. The status of Haydnella pulchellus (A. Milne-Edwards, 1864) is discussed. Moreover, the ventral features of Necronectes michelini (A. Milne-Edwards, 1861) are described for the first time. This decapod assemblage presents clear affinity with coeval decapod faunas from the Mediterranean and Paratethys realm, as evidenced by the presence of identical species such as Liocarcinus kuehni (Bachmayer, 1953) or Pilumnus mediterraneus (Lőrenthey, 1897), which is by far, the most common decapod in the ‘Faluns’ outcrops. Several different chelae and carapace remains are left in open nomenclature.","PeriodicalId":55111,"journal":{"name":"Geodiversitas","volume":"44 1","pages":"207 - 228"},"PeriodicalIF":1.8,"publicationDate":"2022-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44484695","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 : 2022-02-03DOI: 10.5252/geodiversitas2022v44a5
L. O’Dogherty, Noritoshi Suzuki, J. Caulet, P. Dumitrică
ABSTRACT This paper presents, for the first time ever, a complete list of Cenozoic Polycystinea reported between 1834 and 2020. It records 6898 names of taxa originally described as new species or subspecies, assigned to the Class of Polycystinea, the most important group in the infraphylum Radiolaria. This list only attempts to provide an objective record of available and unavailable names, the latter including nomina oblita, nomina nuda, homonyms, invalid nomenclatorial acts, species wrongly described as Polycystinea and nomina dubia species with inexistent name-bearing specimens.
{"title":"Inventory of Cenozoic radiolarian species (Class Polycystinea) – 1834-2020","authors":"L. O’Dogherty, Noritoshi Suzuki, J. Caulet, P. Dumitrică","doi":"10.5252/geodiversitas2022v44a5","DOIUrl":"https://doi.org/10.5252/geodiversitas2022v44a5","url":null,"abstract":"ABSTRACT This paper presents, for the first time ever, a complete list of Cenozoic Polycystinea reported between 1834 and 2020. It records 6898 names of taxa originally described as new species or subspecies, assigned to the Class of Polycystinea, the most important group in the infraphylum Radiolaria. This list only attempts to provide an objective record of available and unavailable names, the latter including nomina oblita, nomina nuda, homonyms, invalid nomenclatorial acts, species wrongly described as Polycystinea and nomina dubia species with inexistent name-bearing specimens.","PeriodicalId":55111,"journal":{"name":"Geodiversitas","volume":"44 1","pages":"75 - 205"},"PeriodicalIF":1.8,"publicationDate":"2022-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44405695","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 : 2022-01-27DOI: 10.5252/geodiversitas2022v44a4
J. Haug, M. Hörnig, C. Kiesmüller, P. Pazinato, V. Baranov, C. Haug
ABSTRACT Myanmar amber is known to provide fossils of the group Insecta with surprising morphologies. Here we present fossils of the new species Gryllobencain patrickmuelleri n. gen., n. sp. from Myanmar amber that possess an overall “orthopteroid” morphology, hence resemble crickets. Unlike in most crickets, thorax appendages 1 and 2 (“legs”) are large and prominent, even in comparison to thorax appendage 3. Furthermore, thorax appendages 1 and 2 are able to fold against themselves and are armed with prominent spine-like setae, indicating that these legs were originally used for grasping prey. Most prominent is a large spine on the tibia of both appendages distantly reminding of the tibial spur or claw of praying mantises. Comparable prey-catching apparatuses have evolved repeatedly in the group Polyneoptera: gladiators (Mantophasmatodea), three ingroups of bush-crickets (Saginae, Austrosaginae, Listroscelidinae) as well as one species of fossil mantises (Santanmantis axelrodi Grimaldi, 2003) appear to have used thorax appendages 1 and 2 for prey catching. The new fossils do not seem to be closely related to any of these groups. They differ especially by prominent cerci equipped with numerous, probably mechano-sensorial setae. In the other five groups, the cerci are significantly smaller, often indistinct. The fossils furthermore have prominent maxillae with sickle-shaped proximal parts and well-armed large palps, indicating that the maxillae played an important role in processing the prey. While the thorax appendages hence represent a case of clear convergent evolution, the uniqueness of the feeding apparatus leads us to recognise the fossils as a highly specialised new species.
缅甸琥珀为昆虫类化石提供了令人惊讶的形态。在这里，我们展示了来自缅甸琥珀的新物种Gryllobencain patrickmuelleri n. gen.， n. sp.的化石，它们具有整体的“直足类”形态，因此与蟋蟀相似。与大多数蟋蟀不同，1号和2号胸附肢(“腿”)大而突出，甚至与3号胸附肢相比也是如此。此外，胸部附属物1和2能够折叠起来，并具有突出的棘状刚毛，表明这些腿最初是用来抓猎物的。最突出的是两个附属物胫骨上的大脊柱，使人想起螳螂的胫骨刺或爪子。在多翅目中，类似的捕食工具也在不断进化:角斗士(Mantophasmatodea)，三组灌木蟋蟀(Saginae, austrrosaginae, Listroscelidinae)以及一种化石螳螂(santan螳螂axelrodi Grimaldi, 2003)似乎都使用了胸部附件1和2来捕捉猎物。这些新发现的化石似乎与这些群体中的任何一个都没有密切的关系。它们的不同之处在于突出的尾部装有大量的，可能是机械感觉的刚毛。在其他五组中，cerci明显较小，通常不明显。此外，这些化石还具有突出的上颌骨，近端呈镰刀状，前臂发达，表明上颌骨在处理猎物方面发挥了重要作用。虽然胸部附属物因此代表了一个明显趋同进化的例子，但进食装置的独特性使我们认识到这些化石是一个高度专业化的新物种。
{"title":"A 100-million-year-old ensiferan with unusual mouthparts and comments on the evolution of raptorial appendages within Polyneoptera","authors":"J. Haug, M. Hörnig, C. Kiesmüller, P. Pazinato, V. Baranov, C. Haug","doi":"10.5252/geodiversitas2022v44a4","DOIUrl":"https://doi.org/10.5252/geodiversitas2022v44a4","url":null,"abstract":"ABSTRACT Myanmar amber is known to provide fossils of the group Insecta with surprising morphologies. Here we present fossils of the new species Gryllobencain patrickmuelleri n. gen., n. sp. from Myanmar amber that possess an overall “orthopteroid” morphology, hence resemble crickets. Unlike in most crickets, thorax appendages 1 and 2 (“legs”) are large and prominent, even in comparison to thorax appendage 3. Furthermore, thorax appendages 1 and 2 are able to fold against themselves and are armed with prominent spine-like setae, indicating that these legs were originally used for grasping prey. Most prominent is a large spine on the tibia of both appendages distantly reminding of the tibial spur or claw of praying mantises. Comparable prey-catching apparatuses have evolved repeatedly in the group Polyneoptera: gladiators (Mantophasmatodea), three ingroups of bush-crickets (Saginae, Austrosaginae, Listroscelidinae) as well as one species of fossil mantises (Santanmantis axelrodi Grimaldi, 2003) appear to have used thorax appendages 1 and 2 for prey catching. The new fossils do not seem to be closely related to any of these groups. They differ especially by prominent cerci equipped with numerous, probably mechano-sensorial setae. In the other five groups, the cerci are significantly smaller, often indistinct. The fossils furthermore have prominent maxillae with sickle-shaped proximal parts and well-armed large palps, indicating that the maxillae played an important role in processing the prey. While the thorax appendages hence represent a case of clear convergent evolution, the uniqueness of the feeding apparatus leads us to recognise the fossils as a highly specialised new species.","PeriodicalId":55111,"journal":{"name":"Geodiversitas","volume":"44 1","pages":"57 - 73"},"PeriodicalIF":1.8,"publicationDate":"2022-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46627247","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 : 2022-01-20DOI: 10.5252/geodiversitas2022v44a3
Erik Tihelka, D. Peris, Chen-yang Cai, V. Perrichot
ABSTRACT Jacobsoniidae is a species-poor family of minute polyphagan beetles distributed in tropical and subtropical regions. Both extant representatives of the family as well as fossils are rare. Here we describe a new fossil species, Derolathrus capdoliensis n. sp., from latest Albian-earliest Cenomanian Charentese amber from the Cadeuil deposit, Charente-Maritime department in south-western France. The new species is defined by several unusual characters, most notably the co-joined but not fully fused two apical antennomeres. Derolathrus capdoliensis n. sp. is approximately contemporaneous with Kachin amber (burmite), filling an important geographical gap in the Mesozoic distribution of the family. The widespread distribution of jacobsoniid beetles in the Cretaceous, encompassing the Tethyan and Austral realms, indicates a more widespread distribution of the family during this time than in the present day and suggests that the current biogeographical range of Jacobsoniidae may be a result of extinction in northern regions. The new species shows remarkable similarity to extant members of the genus and provides further evidence of prolonged morphological, and probably also ecological, stasis in Jacobsoniidae since at least the Cretaceous.
{"title":"A Jacobson's beetle from Cretaceous Charentese amber (Coleoptera: Jacobsoniidae)","authors":"Erik Tihelka, D. Peris, Chen-yang Cai, V. Perrichot","doi":"10.5252/geodiversitas2022v44a3","DOIUrl":"https://doi.org/10.5252/geodiversitas2022v44a3","url":null,"abstract":"ABSTRACT Jacobsoniidae is a species-poor family of minute polyphagan beetles distributed in tropical and subtropical regions. Both extant representatives of the family as well as fossils are rare. Here we describe a new fossil species, Derolathrus capdoliensis n. sp., from latest Albian-earliest Cenomanian Charentese amber from the Cadeuil deposit, Charente-Maritime department in south-western France. The new species is defined by several unusual characters, most notably the co-joined but not fully fused two apical antennomeres. Derolathrus capdoliensis n. sp. is approximately contemporaneous with Kachin amber (burmite), filling an important geographical gap in the Mesozoic distribution of the family. The widespread distribution of jacobsoniid beetles in the Cretaceous, encompassing the Tethyan and Austral realms, indicates a more widespread distribution of the family during this time than in the present day and suggests that the current biogeographical range of Jacobsoniidae may be a result of extinction in northern regions. The new species shows remarkable similarity to extant members of the genus and provides further evidence of prolonged morphological, and probably also ecological, stasis in Jacobsoniidae since at least the Cretaceous.","PeriodicalId":55111,"journal":{"name":"Geodiversitas","volume":"44 1","pages":"47 - 56"},"PeriodicalIF":1.8,"publicationDate":"2022-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44311325","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 : 2022-01-14DOI: 10.5252/geodiversitas2022v44a2
B. Mecozzi, Flavia Strani
ABSTRACT The Apulian Peninsula represents a key-region for the study of climatic changes and paleoenvironmental dynamics during the Quaternary. Both large and small-sized horses are well documented in this region during the Pleistocene and are frequently found associated. The caballoid horses from Middle to Late Pleistocene of Europe show a large intraspecific ecomorphological variation, emphasizing a strong link between skeletal adaptations and specific aspects of the palaeoenvironment. This large variability led to an extended debate concerning the taxonomy of equids and their evolutionary history. In the Italian Peninsula, fossils from the Middle to the Late Pleistocene have been historically referred to several species (or even subspecies), emphasizing the uncertainty of the taxonomic attribution. Here, a large craniodental sample of Equidae fossils from late Middle Pleistocene to the Early Holocene localities of the Apulia Peninsula are described for the first time. The comparison of the protocone index allowed us to determine the first occurrences of Equus mosbachensis von Reichenau, 1903 in the Apulian Peninsula, from a few localities chronologically referred to late Middle Pleistocene. Most of the material from the late Middle to the end of the Late Pleistocene is instead attributed to Equus ferus Boddaert, 1785. The results of this work thus add novel information on the biochronology of Italian fossil equids and their evolutionary history through the Middle and Late Pleistocene.
阿普利亚半岛是研究第四纪气候变化和古环境动力学的关键区域。在更新世期间，该地区的大型和小型马都有很好的记录，并且经常被发现有关联。欧洲中更新世至晚更新世的caballoid马显示出较大的种内生态形态变异，强调了骨骼适应与古环境特定方面之间的紧密联系。这种巨大的变异导致了关于马科动物分类及其进化史的长期争论。在意大利半岛，从中新世到晚更新世的化石在历史上被称为几个物种(甚至亚种)，强调了分类归属的不确定性。本文首次描述了阿普利亚半岛中更新世晚期至全新世早期的大型马科头骨化石样本。原始锥体指数的比较使我们能够确定1903年在阿普里亚半岛最早出现的Equus mosbachensis von Reichenau，从几个年代上被称为中更新世晚期的地方。大多数中晚期到晚更新世末期的材料被认为是Equus ferus Boddaert, 1785。因此，这项工作的结果为意大利化石马科动物的生物年代学及其在中新世和晚更新世的进化史增加了新的信息。
{"title":"Equids from the late Middle Pleistocene to Early Holocene of the Apulia Peninsula (southern Italy): reassessment of their taxonomy and biochronology","authors":"B. Mecozzi, Flavia Strani","doi":"10.5252/geodiversitas2022v44a2","DOIUrl":"https://doi.org/10.5252/geodiversitas2022v44a2","url":null,"abstract":"ABSTRACT The Apulian Peninsula represents a key-region for the study of climatic changes and paleoenvironmental dynamics during the Quaternary. Both large and small-sized horses are well documented in this region during the Pleistocene and are frequently found associated. The caballoid horses from Middle to Late Pleistocene of Europe show a large intraspecific ecomorphological variation, emphasizing a strong link between skeletal adaptations and specific aspects of the palaeoenvironment. This large variability led to an extended debate concerning the taxonomy of equids and their evolutionary history. In the Italian Peninsula, fossils from the Middle to the Late Pleistocene have been historically referred to several species (or even subspecies), emphasizing the uncertainty of the taxonomic attribution. Here, a large craniodental sample of Equidae fossils from late Middle Pleistocene to the Early Holocene localities of the Apulia Peninsula are described for the first time. The comparison of the protocone index allowed us to determine the first occurrences of Equus mosbachensis von Reichenau, 1903 in the Apulian Peninsula, from a few localities chronologically referred to late Middle Pleistocene. Most of the material from the late Middle to the end of the Late Pleistocene is instead attributed to Equus ferus Boddaert, 1785. The results of this work thus add novel information on the biochronology of Italian fossil equids and their evolutionary history through the Middle and Late Pleistocene.","PeriodicalId":55111,"journal":{"name":"Geodiversitas","volume":"44 1","pages":"17 - 45"},"PeriodicalIF":1.8,"publicationDate":"2022-01-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44436024","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 : 2022-01-06DOI: 10.5252/geodiversitas2022v44a1
René H. B. Fraaije, B. V. van Bakel, J. Jagt, S. Charbonnier, G. Schweigert, G. Garcia, Xavier Valentin
ABSTRACT In our ongoing studies of both extinct and extant hermit crabs (Paguroidea Latreille, 1802), we have observed and recorded a number of morphological changes that have taken place between Early Jurassic times (c. 185 million years ago) and the present day. Species compositions of paguroid assemblages from marine Upper Jurassic and Lower Cretaceous rocks in Europe are here compared with those of modern marine settings. Basal paguroids with cylindrical carapaces predominated in reefal environments during the Late Jurassic, but were gradually replaced by hermit crabs with non-cylindrical carapaces. The most basal paguroids reveal a branchial groove, but branchial condensation towards a single (i.e., cervical) groove is here shown to have occurred early in their evolutionary history. In several extant, genera remnants of a branchial groove, in combination with several other basal features, can be seen. For this reason, these are here considered to be the most primitive members amongst extant paguroids. In this study, we resurrect the family Probeebeidae and erect a new family, Paguropsidae n. fam, to accommodate extant basal hermit crabs such as Paguropsis Henderson, 1888, Eopaguropsis Fraaije, Krzemiński, Van Bakel, Krzemińska & Jagt, 2012 and Paguropsina Lemaitre, Rahayu & Komai, 2018. Described are also one pair of Early Jurassic (Pliensbachian) and two pairs of Middle Jurassic (Callovian) isochelous paguroid chelae, all collected recently. A new specimen of Schobertella reveals some important morphological traits of the shield that had not been observed previously. The earliest known example to date of clearly heterochelous chelae in the fossil record of hermit crabs originates from upper Kimmeridgian/Tithonian strata in the Boulonnais (northwestern France). For the first time, a phylogenetic scheme of marine Paguroidea, as based on morphological data of carapaces, is presented.
{"title":"The evolution of hermit crabs (Crustacea, Decapoda, Anomura, Paguroidea) on the basis of carapace morphology: a state-of-the-art-report","authors":"René H. B. Fraaije, B. V. van Bakel, J. Jagt, S. Charbonnier, G. Schweigert, G. Garcia, Xavier Valentin","doi":"10.5252/geodiversitas2022v44a1","DOIUrl":"https://doi.org/10.5252/geodiversitas2022v44a1","url":null,"abstract":"ABSTRACT In our ongoing studies of both extinct and extant hermit crabs (Paguroidea Latreille, 1802), we have observed and recorded a number of morphological changes that have taken place between Early Jurassic times (c. 185 million years ago) and the present day. Species compositions of paguroid assemblages from marine Upper Jurassic and Lower Cretaceous rocks in Europe are here compared with those of modern marine settings. Basal paguroids with cylindrical carapaces predominated in reefal environments during the Late Jurassic, but were gradually replaced by hermit crabs with non-cylindrical carapaces. The most basal paguroids reveal a branchial groove, but branchial condensation towards a single (i.e., cervical) groove is here shown to have occurred early in their evolutionary history. In several extant, genera remnants of a branchial groove, in combination with several other basal features, can be seen. For this reason, these are here considered to be the most primitive members amongst extant paguroids. In this study, we resurrect the family Probeebeidae and erect a new family, Paguropsidae n. fam, to accommodate extant basal hermit crabs such as Paguropsis Henderson, 1888, Eopaguropsis Fraaije, Krzemiński, Van Bakel, Krzemińska & Jagt, 2012 and Paguropsina Lemaitre, Rahayu & Komai, 2018. Described are also one pair of Early Jurassic (Pliensbachian) and two pairs of Middle Jurassic (Callovian) isochelous paguroid chelae, all collected recently. A new specimen of Schobertella reveals some important morphological traits of the shield that had not been observed previously. The earliest known example to date of clearly heterochelous chelae in the fossil record of hermit crabs originates from upper Kimmeridgian/Tithonian strata in the Boulonnais (northwestern France). For the first time, a phylogenetic scheme of marine Paguroidea, as based on morphological data of carapaces, is presented.","PeriodicalId":55111,"journal":{"name":"Geodiversitas","volume":"44 1","pages":"1 - 16"},"PeriodicalIF":1.8,"publicationDate":"2022-01-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42418637","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 : 2021-12-20DOI: 10.5252/geodiversitas2021v43a27
J. Steyer, M. Augé, G. Métais
ABSTRACT Jean-Claude Rage (1943-2018) was a renowned vertebrates paleontologist who dedicated his career to fossil amphibians and reptiles, which earned him the highest reputation. He was CNRS Emeritus Director of Research in Paris and worked in the laboratory of paleontology of the Muséum national d'Histoire naturelle (MNHN) together with the authors of this article (JSS and MA were also his Master and PhD students). Jean-Claude has established himself as an outstanding herpetologist and taxonomist with numerous publications (more then 250 articles, see below) throughout his career. The aim of this article is not to describe in details his very rich career (see Steyer & Buffetaut 2012 for details) but to show how important his research was, and is still, and to go deeper in his personality to show that his intellectual legacy should be considered as a model today.
{"title":"Jean-Claude Rage, a life dedicated to paleoherpetology","authors":"J. Steyer, M. Augé, G. Métais","doi":"10.5252/geodiversitas2021v43a27","DOIUrl":"https://doi.org/10.5252/geodiversitas2021v43a27","url":null,"abstract":"ABSTRACT Jean-Claude Rage (1943-2018) was a renowned vertebrates paleontologist who dedicated his career to fossil amphibians and reptiles, which earned him the highest reputation. He was CNRS Emeritus Director of Research in Paris and worked in the laboratory of paleontology of the Muséum national d'Histoire naturelle (MNHN) together with the authors of this article (JSS and MA were also his Master and PhD students). Jean-Claude has established himself as an outstanding herpetologist and taxonomist with numerous publications (more then 250 articles, see below) throughout his career. The aim of this article is not to describe in details his very rich career (see Steyer & Buffetaut 2012 for details) but to show how important his research was, and is still, and to go deeper in his personality to show that his intellectual legacy should be considered as a model today.","PeriodicalId":55111,"journal":{"name":"Geodiversitas","volume":"43 1","pages":"1401 - 1409"},"PeriodicalIF":1.8,"publicationDate":"2021-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49334965","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 : 2021-12-16DOI: 10.5252/geodiversitas2021v43a26
P. Moissette, A. Antonarakou, G. Kontakiotis, J. Cornée, V. Karakitsios
ABSTRACT Four sedimentary sections were logged and sampled from upper Tortonian-lower Messinian outcrops on the island of Crete (Greece). The collected material yielded about 60 bryozoan species belonging to nine different colonial morphotypes. A few species are stenobathic, indicating either shallow- or deep-water environments, but most of them are eurybathic (with bathymetric ranges extending in some instances from the shelf down to several hundreds of metres). Bryozoan communities point to sea-level variations modulated by local tectonics. Deep circalittoral environments were recognized at the base of three sections (whereas the fourth section starts with infralittoral/shallow circalittoral environments passing to deep circalittoral. Shallow bathyal habitats follow upwards, succeeded in turn by assemblages indicative of deep circalittoral and subsequently shallow circalittoral/infralittoral depths. Inferred bathymetric fluctuations are diachronous throughout the island. Shallow-water species found associated, sometimes abundantly, with rarer deep-water faunas in a few levels, are interpreted as transported by currents. Several dysoxic episodes have been also detected: likely the result of water column stratification and enhanced productivity. These processes were probably boosted by a combination of changes in oceanic circulation, climate, global sea-level, and the local/regional tectonics (in Crete and/or the marine gateways between the Mediterranean and the Atlantic).
{"title":"Bryozoan faunas at the Tortonian-Messinian transition. A palaeoenvironmental case study from Crete Island, eastern Mediterranean","authors":"P. Moissette, A. Antonarakou, G. Kontakiotis, J. Cornée, V. Karakitsios","doi":"10.5252/geodiversitas2021v43a26","DOIUrl":"https://doi.org/10.5252/geodiversitas2021v43a26","url":null,"abstract":"ABSTRACT Four sedimentary sections were logged and sampled from upper Tortonian-lower Messinian outcrops on the island of Crete (Greece). The collected material yielded about 60 bryozoan species belonging to nine different colonial morphotypes. A few species are stenobathic, indicating either shallow- or deep-water environments, but most of them are eurybathic (with bathymetric ranges extending in some instances from the shelf down to several hundreds of metres). Bryozoan communities point to sea-level variations modulated by local tectonics. Deep circalittoral environments were recognized at the base of three sections (whereas the fourth section starts with infralittoral/shallow circalittoral environments passing to deep circalittoral. Shallow bathyal habitats follow upwards, succeeded in turn by assemblages indicative of deep circalittoral and subsequently shallow circalittoral/infralittoral depths. Inferred bathymetric fluctuations are diachronous throughout the island. Shallow-water species found associated, sometimes abundantly, with rarer deep-water faunas in a few levels, are interpreted as transported by currents. Several dysoxic episodes have been also detected: likely the result of water column stratification and enhanced productivity. These processes were probably boosted by a combination of changes in oceanic circulation, climate, global sea-level, and the local/regional tectonics (in Crete and/or the marine gateways between the Mediterranean and the Atlantic).","PeriodicalId":55111,"journal":{"name":"Geodiversitas","volume":"43 1","pages":"1365 - 1400"},"PeriodicalIF":1.8,"publicationDate":"2021-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46629425","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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