Abstract. Paleoxyela nearctica gen. et sp. nov., is described from the upper Eocene of Florissant Formation in Colorado. We placed Paleoxyela gen. nov. in the subfamily Macroxyelinae and the tribe Macroxyelini based on the numerous wing venation characters visible on the specimen. Proxyelia pankowskii gen. et sp. nov. is described from the lower Eocene Fossil Lake deposits of the Green River Formation in Wyoming. We placed Proxyelia gen. nov. in the subfamily Macroxyelinae and the tribe Xyeleciini based on the numerous wing venation characters visible on the specimen. These new records of the family Xyelidae are of particular importance to better understand the past diversity of the clade and propose hypotheses about their diversification. Extant Xyelidae inhabit temperate Northern Hemisphere forests, and most of their larvae feed on conifers, which may explain why they are relatively poorly diversified compared to the other symphytan families. We suggest that the global decline in conifers and the reduced diversity of extant host trees partly explain the diversity of extant Xyelidae. We correlate the biome repartition during the Eocene to that of the extant xyelid.
摘要古新叶藻nearctica gen. et sp. nov.，描述自美国科罗拉多州始新统上弗洛里森特组。根据在标本上可见的大量翅纹特征，我们将古叶猴属归入大叶猴亚科和大叶猴族。Proxyelia pankowskii gen. et sp. 11 .被描述为来自怀俄明州绿河组始新世下化石湖矿床。根据在标本上可见的大量翅脉特征，我们将Proxyelia gen. 11 .归入大叶蝉亚科和木叶蝉族。这些新记录对于更好地了解该分支过去的多样性和提出有关其多样性的假设具有特别重要的意义。现存的叶藻科栖息在温带的北半球森林中，它们的大部分幼虫以针叶树为食，这可能解释了为什么它们与其他共生植物科相比多样性相对较差。我们认为，全球针叶树数量的减少和现存寄主树木多样性的减少可以部分解释现存针叶树科的多样性。我们将始新世生物群系的重新分配与现存的木鞘的重新分配联系起来。
{"title":"Past ecosystems drive the evolution of the early diverged Symphyta (Hymenoptera: Xyelidae) since the earliest Eocene","authors":"C. Jouault, Arvid Aase, A. Nel","doi":"10.5194/fr-24-379-2021","DOIUrl":"https://doi.org/10.5194/fr-24-379-2021","url":null,"abstract":"Abstract. Paleoxyela nearctica gen. et sp. nov., is described from the upper Eocene of\u0000Florissant Formation in Colorado. We placed Paleoxyela gen. nov. in the subfamily\u0000Macroxyelinae and the tribe Macroxyelini based on the numerous wing venation\u0000characters visible on the specimen. Proxyelia pankowskii gen. et sp. nov. is described from the\u0000lower Eocene Fossil Lake deposits of the Green River Formation in Wyoming.\u0000We placed Proxyelia gen. nov. in the subfamily Macroxyelinae and the tribe Xyeleciini\u0000based on the numerous wing venation characters visible on the specimen.\u0000These new records of the family Xyelidae are of particular importance to\u0000better understand the past diversity of the clade and propose hypotheses\u0000about their diversification. Extant Xyelidae inhabit temperate Northern\u0000Hemisphere forests, and most of their larvae feed on conifers, which may\u0000explain why they are relatively poorly diversified compared to the other\u0000symphytan families. We suggest that the global decline in conifers and the\u0000reduced diversity of extant host trees partly explain the diversity of\u0000extant Xyelidae. We correlate the biome repartition during the Eocene to\u0000that of the extant xyelid.\u0000","PeriodicalId":48830,"journal":{"name":"Fossil Record","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2021-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48099891","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract. Several British specimens of relatively complete and partial shells of small pleurosternid turtles, found in the Purbeck Limestone Group (Berriasian, Lower Cretaceous), are analysed in detail here. Despite having been found more than a century ago, most of them remained unpublished until now. Due to the scarce knowledge available to date about the small individuals of Pleurosternidae from the British record, their taxonomic status was doubtful. Thus, some authors proposed their attribution to a new but not defined taxon of small size, whereas others suggested that they could represent juvenile individuals of Pleurosternon bullockii, the adults of which were also found in the Purbeck Limestone Group but at different levels. Knowledge about the shell of the adult individuals of Pleurosternon bullockii has notably increased recently, abundant information on its intraspecific variability being currently available. In this context, a detailed study of the small specimens through qualitative and quantitative approaches is performed here. The results are evidence a significant range of shape variability because of ontogenetic development, as well as other types of intraspecific variation such as inter-individual variation. As a consequence, their attribution to juvenile individuals of Pleurosternon bullockii is justified, providing new data on the ontogenetic development of a basal form.
{"title":"Ontogenetic development of the European basal aquatic turtle Pleurosternon bullockii (Paracryptodira, Pleurosternidae)","authors":"Andrea Guerrero, A. Pérez‐García","doi":"10.5194/fr-24-357-2021","DOIUrl":"https://doi.org/10.5194/fr-24-357-2021","url":null,"abstract":"Abstract. Several British specimens of relatively complete and partial\u0000shells of small pleurosternid turtles, found in the Purbeck Limestone Group\u0000(Berriasian, Lower Cretaceous), are analysed in detail here. Despite having\u0000been found more than a century ago, most of them remained unpublished until\u0000now. Due to the scarce knowledge available to date about the small\u0000individuals of Pleurosternidae from the British record, their taxonomic\u0000status was doubtful. Thus, some authors proposed their attribution to a new\u0000but not defined taxon of small size, whereas others suggested that they\u0000could represent juvenile individuals of Pleurosternon bullockii, the adults of which were also\u0000found in the Purbeck Limestone Group but at different levels. Knowledge\u0000about the shell of the adult individuals of Pleurosternon bullockii has notably increased recently,\u0000abundant information on its intraspecific variability being currently\u0000available. In this context, a detailed study of the small specimens through\u0000qualitative and quantitative approaches is performed here. The results\u0000are evidence a significant range of shape variability because of ontogenetic\u0000development, as well as other types of intraspecific variation such as\u0000inter-individual variation. As a consequence, their attribution to juvenile\u0000individuals of Pleurosternon bullockii is justified, providing new data on the ontogenetic\u0000development of a basal form.\u0000","PeriodicalId":48830,"journal":{"name":"Fossil Record","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2021-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48741902","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Robin Kundrata, A. Prosvirov, R. Long, Gabriela Packova
Abstract. Although the Mesozoic Era played an important role in the evolution and diversification of Elateridae, the Cretaceous click-beetle fauna remains very poorly known. Here we describe Cretopachyderes burmitinus gen. et sp. nov. based on a single specimen from the mid-Cretaceous Burmese amber. This species is remarkable for its extremely long posterior angles of pronotum, which is a unique character among fossil Elateridae. We discuss the diagnostic characters of Cretopachyderes gen. nov. and tentatively place it to subfamily Agrypninae close to extant genus Pachyderes Guérin-Méneville, 1829.
{"title":"Cretopachyderes gen. nov., a new remarkable click beetle (Coleoptera: Elateridae: Agrypninae) from the mid-Cretaceous Burmese amber","authors":"Robin Kundrata, A. Prosvirov, R. Long, Gabriela Packova","doi":"10.5194/fr-24-347-2021","DOIUrl":"https://doi.org/10.5194/fr-24-347-2021","url":null,"abstract":"Abstract. Although the Mesozoic Era played an important role in the\u0000evolution and diversification of Elateridae, the Cretaceous click-beetle\u0000fauna remains very poorly known. Here we describe Cretopachyderes burmitinus gen. et sp. nov. based on\u0000a single specimen from the mid-Cretaceous Burmese amber. This species is\u0000remarkable for its extremely long posterior angles of pronotum, which is a\u0000unique character among fossil Elateridae. We discuss the diagnostic\u0000characters of Cretopachyderes gen. nov. and tentatively place it to subfamily Agrypninae\u0000close to extant genus Pachyderes Guérin-Méneville, 1829.\u0000","PeriodicalId":48830,"journal":{"name":"Fossil Record","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2021-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46184515","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Valentine Bouju, Simon Rosse-Guillevic, Marion Griffon, Błażej Bojarski, J. Szwedo, V. Perrichot
Abstract. A new, extinct species of Allodia Winnertz is described from early Miocene amber of Ethiopia. Allodia paleoafricana sp. nov. is mostly characterized by the scutum with strong anteromarginal, dorsocentral, and lateral setae and the wing with the stem of the M-fork slightly shorter than the vein r–m and the base of the M4–CuA fork aligned with the base of r–m. The assignment to any of the two subgenera Allodia stricto sensu or Brachycampta Winnertz remains equivocal as the fossil intermingles traits found in both taxa. Allodia is known mostly from the Palearctic region, while only a few species have been described from Africa. In this regard, the new fossil species from Ethiopia brings significant new information regarding the Afrotropical distribution and natural history of the genus.
{"title":"The genus Allodia (Diptera: Mycetophilidae) in Miocene Ethiopian amber","authors":"Valentine Bouju, Simon Rosse-Guillevic, Marion Griffon, Błażej Bojarski, J. Szwedo, V. Perrichot","doi":"10.5194/fr-24-339-2021","DOIUrl":"https://doi.org/10.5194/fr-24-339-2021","url":null,"abstract":"Abstract. A new, extinct species of Allodia Winnertz is described from early\u0000Miocene amber of Ethiopia. Allodia paleoafricana sp. nov. is mostly characterized by the scutum\u0000with strong anteromarginal, dorsocentral, and lateral setae and the wing\u0000with the stem of the M-fork slightly shorter than the vein r–m and the base of the M4–CuA fork\u0000aligned with the base of r–m. The assignment to any of the two subgenera\u0000Allodia stricto sensu or Brachycampta Winnertz remains equivocal as the fossil intermingles traits found in\u0000both taxa. Allodia is known mostly from the Palearctic region, while only a few\u0000species have been described from Africa. In this regard, the new fossil\u0000species from Ethiopia brings significant new information regarding the\u0000Afrotropical distribution and natural history of the genus.\u0000","PeriodicalId":48830,"journal":{"name":"Fossil Record","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2021-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43019275","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract. Eryopid temnospondyls were large apex predators in Carboniferous and Permian stream and lake habitats. The eryopid life cycle is exemplified by Onchiodon labyrinthicus from Niederhäslich (Saxony, Germany), which is represented by numerous size classes from small larvae to heavily ossified adults. Morphometric and principal component analyses provide new insights into ontogenetic changes in O. labyrinthicus, and comparison with adults of other eryopids documents phylogenetic patterns in the occupation of morphospace. Compared with small specimens of Sclerocephalus spp., immature O. labyrinthicus occupies a neighboring but much larger space, corresponding to a broader range of variation. Adults of Actinodon frossardi map with some juveniles of O. labyrinthicus, whereas other juveniles of the latter lie close to adults of O. thuringiensis, Glaukerpeton avinoffi and Osteophorus roemeri. Morphospace occupation of adult eryopids is partly consistent with cladistic tree topology, which gives the following branching pattern: Actinodon frossardi forms the basalmost eryopid, followed by Osteophorus roemeri, Glaukerpeton avinoffi and the genus Onchiodon (O. labyrinthicus + O. thuringiensis); then Clamorosaurus nocturnus; and finally the monophyletic genus Eryops. The presumably juvenile skull of Eryops anatinus falls well outside the domains of both adult eryopids and immature O. labyrinthicus, showing a unique combination of juvenile and adult features. Instead, Onchiodon langenhani and the Ruprechtice specimens referred to O. labyrinthicus map within the domain of immature O. labyrinthicus. Raised levels of variation in O. labyrinthicus coincide with evidence of a stressed habitat, in which limiting factors were fluctuating salinity, absence of fishes, enhanced competition and seasonal algal blooms. The documented broad variation was possibly caused by developmental plasticity responding to fluctuations in lake hydrology and nutrients in this small, short-lived water body.
{"title":"The life cycle in late Paleozoic eryopid temnospondyls: developmental variation, plasticity and phylogeny","authors":"R. Schoch","doi":"10.5194/fr-24-295-2021","DOIUrl":"https://doi.org/10.5194/fr-24-295-2021","url":null,"abstract":"Abstract. Eryopid temnospondyls were large apex predators in Carboniferous\u0000and Permian stream and lake habitats. The eryopid life cycle is exemplified\u0000by Onchiodon labyrinthicus from Niederhäslich (Saxony, Germany), which is represented by\u0000numerous size classes from small larvae to heavily ossified adults.\u0000Morphometric and principal component analyses provide new insights into\u0000ontogenetic changes in O. labyrinthicus, and comparison with adults of other eryopids\u0000documents phylogenetic patterns in the occupation of morphospace. Compared with small specimens of Sclerocephalus spp., immature O. labyrinthicus occupies a neighboring but\u0000much larger space, corresponding to a broader range of variation. Adults of\u0000Actinodon frossardi map with some juveniles of O. labyrinthicus, whereas other juveniles of the latter lie\u0000close to adults of O. thuringiensis, Glaukerpeton avinoffi and Osteophorus roemeri. Morphospace occupation of adult eryopids is partly consistent with cladistic\u0000tree topology, which gives the following branching pattern: Actinodon frossardi forms the\u0000basalmost eryopid, followed by Osteophorus roemeri, Glaukerpeton avinoffi and the genus Onchiodon (O. labyrinthicus + O. thuringiensis); then Clamorosaurus nocturnus; and finally the\u0000monophyletic genus Eryops. The presumably juvenile skull of Eryops anatinus falls well outside the\u0000domains of both adult eryopids and immature O. labyrinthicus, showing a unique combination\u0000of juvenile and adult features. Instead, Onchiodon langenhani and the Ruprechtice specimens\u0000referred to O. labyrinthicus map within the domain of immature O. labyrinthicus. Raised levels of variation in O. labyrinthicus coincide with evidence of a stressed habitat,\u0000in which limiting factors were fluctuating salinity, absence of fishes,\u0000enhanced competition and seasonal algal blooms. The documented broad\u0000variation was possibly caused by developmental plasticity responding to\u0000fluctuations in lake hydrology and nutrients in this small, short-lived\u0000water body.\u0000","PeriodicalId":48830,"journal":{"name":"Fossil Record","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2021-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43571795","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract. The ichthyosaur fossil record of Portugal is composed of specimens from the localities of São Pedro de Moel, Alhadas, Cadima, Murtede, Casal do Combo, Condeixa, Alvaiázere and Tomar, within the confines of the Lusitanian Basin, ranging in age from the Sinemurian to the Aalenian. We reviewed the historical ichthyosaur finds in Portugal, and in this work we focus on the specimen IST-MDT 85, from the Sinemurian of Praia de Nossa Senhora da Vitória, central west coast of Portugal. The specimen was herein ascribed to Ichthyosaurus cf. communis, based on characters of the humerus in comparison with other specimens. This is the southernmost documented occurrence of Ichthyosaurus, widening the geographical range of the genus.
摘要葡萄牙的鱼龙化石记录由来自卢西塔尼亚盆地范围内的São Pedro de Moel、Alhadas、Cadima、Murtede、Casal do Combo、Condeixa、Alwaiázere和Tomar等地的物种组成，年龄从Sinemurian到Aalenian不等。我们回顾了在葡萄牙发现的历史鱼龙，在这项工作中，我们重点研究了来自葡萄牙中西部海岸Praia de NossaSenhora da Vitória的Sinemurian的IST-MDT 85标本。与其他标本相比，根据肱骨的特征，Washere标本被认为是鱼龙。这是有记录以来最南端的鱼龙，扩大了该属的地理范围。
{"title":"The southernmost occurrence of Ichthyosaurus from the Sinemurian of Portugal","authors":"J. Sousa, O. Mateus","doi":"10.5194/fr-24-287-2021","DOIUrl":"https://doi.org/10.5194/fr-24-287-2021","url":null,"abstract":"Abstract. The ichthyosaur fossil record of Portugal is composed of\u0000specimens from the localities of São Pedro de Moel, Alhadas, Cadima, Murtede,\u0000Casal do Combo, Condeixa, Alvaiázere and Tomar, within the confines of\u0000the Lusitanian Basin, ranging in age from the Sinemurian to the Aalenian. We\u0000reviewed the historical ichthyosaur finds in Portugal, and in this work we\u0000focus on the specimen IST-MDT 85, from the Sinemurian of Praia de Nossa\u0000Senhora da Vitória, central west coast of Portugal. The specimen was\u0000herein ascribed to Ichthyosaurus cf. communis, based on characters of the humerus in comparison with\u0000other specimens. This is the southernmost documented occurrence of\u0000Ichthyosaurus, widening the geographical range of the genus.\u0000","PeriodicalId":48830,"journal":{"name":"Fossil Record","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2021-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49570856","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract. A new monotypic genus of Neogene odontocete (Isoninia borealis) is named on the basis of a partial skull (CMM-V-4061). The holotype was found on the riverbed of the Meherrin River (North Carolina, USA) and probably originated from the Miocene marine Eastover Formation. Deep interdigitation of the cranial sutures indicates that this individual was mature. The new taxon differs from all other delphinidans in the unique combination of the following characters: anteriorly retracted premaxillae and maxillae; premaxillae not contacting nasals; thick nasals with ventrolateral margins deeply imbedded within corresponding troughs in the frontals (this is an apomorphy); nasals with transversely convex dorsal surface; nearly symmetrical vertex; os suturarum (or interparietal or extra folds of the frontals) at the vertex; large dorsal infraorbital foramen level with the posterior margin of the external bony nares; and a postorbital recess on the ventrolateral face of the frontal below and behind the postorbital process of the frontal. This odontocete exhibits two small but pronounced concavities on the cerebral face of the frontal/presphenoid that are presumed to have held vestigial olfactory bulbs in life. Inioidea is only diagnosed by a single unequivocal synapomorphy: width across nasals and nares subequal. Isoninia shares this feature with other inioids and forms the basis for the placement of Isoninia within this clade. A relatively high vertex coupled with a supraoccipital that is deeply wedged between the frontals suggests placement of this new inioid species within the family Iniidae. This is the second inioid described from the Eastover Formation (the other being Meherrinia isoni). This new species adds new cranial morphology and a new combination of cranial characters to this taxonomically small but growing group of mostly marine and mostly Western Hemisphere odontocetes (urn:lsid:zoobank.org:pub:E8B817CA-B250-42B3-9365-36EFBFE351C9).
{"title":"A new odontocete (Inioidea, Odontoceti) from the late Neogene of North Carolina, USA","authors":"S. J. Godfrey, C. S. Gutstein, D. J. Morgan","doi":"10.5194/fr-24-275-2021","DOIUrl":"https://doi.org/10.5194/fr-24-275-2021","url":null,"abstract":"Abstract. A new monotypic genus of Neogene odontocete (Isoninia borealis) is named on the\u0000basis of a partial skull (CMM-V-4061). The holotype was found on the\u0000riverbed of the Meherrin River (North Carolina, USA) and probably\u0000originated from the Miocene marine Eastover Formation. Deep interdigitation\u0000of the cranial sutures indicates that this individual was mature. The new\u0000taxon differs from all other delphinidans in the unique combination of the\u0000following characters: anteriorly retracted premaxillae and maxillae;\u0000premaxillae not contacting nasals; thick nasals with ventrolateral margins\u0000deeply imbedded within corresponding troughs in the frontals (this is an\u0000apomorphy); nasals with transversely convex dorsal surface; nearly\u0000symmetrical vertex; os suturarum (or interparietal or extra folds of the\u0000frontals) at the vertex; large dorsal infraorbital foramen level with the\u0000posterior margin of the external bony nares; and a postorbital recess on the\u0000ventrolateral face of the frontal below and behind the postorbital process\u0000of the frontal. This odontocete exhibits two small but pronounced\u0000concavities on the cerebral face of the frontal/presphenoid that are\u0000presumed to have held vestigial olfactory bulbs in life. Inioidea is only\u0000diagnosed by a single unequivocal synapomorphy: width across nasals and\u0000nares subequal. Isoninia shares this feature with other inioids and forms the basis\u0000for the placement of Isoninia within this clade. A relatively high vertex coupled\u0000with a supraoccipital that is deeply wedged between the frontals suggests\u0000placement of this new inioid species within the family Iniidae. This is the\u0000second inioid described from the Eastover Formation (the other being\u0000Meherrinia isoni). This new species adds new cranial morphology and a new combination of\u0000cranial characters to this taxonomically small but growing group of mostly\u0000marine and mostly Western Hemisphere odontocetes (urn:lsid:zoobank.org:pub:E8B817CA-B250-42B3-9365-36EFBFE351C9).\u0000","PeriodicalId":48830,"journal":{"name":"Fossil Record","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2021-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49373325","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract. Connectivity and climate control fish distribution today as well as in the geological past. We present here the Aquitanian (early Miocene) marine fish of the Mesohellenic Basin, a restricted basin at the border between the proto-Mediterranean and Paratethyan seas. Based on fish otoliths, we were able to identify 19 species from 17 genera, including two new species: Ariosoma mesohellenica and Gnathophis elongatus. This fish assemblage, in conjunction with the accompanying molluscan assemblage, indicates a variable shelf paleoenvironment with easy access to the open ocean. Although available data on the Indo-Pacific fishes of the early Miocene are very limited, the fish fauna of the Mesohellenic Basin has many elements in common with the North Sea, the NE Atlantic, and the Paratethys.
{"title":"At the crossroads: early Miocene marine fishes of the proto-Mediterranean Sea","authors":"K. Agiadi, E. Koskeridou, Danae Thivaiou","doi":"10.5194/fr-24-233-2021","DOIUrl":"https://doi.org/10.5194/fr-24-233-2021","url":null,"abstract":"Abstract. Connectivity and climate control fish distribution today\u0000as well as in the geological past. We present here the Aquitanian (early\u0000Miocene) marine fish of the Mesohellenic Basin, a restricted basin at the\u0000border between the proto-Mediterranean and Paratethyan seas. Based on fish\u0000otoliths, we were able to identify 19 species from 17 genera, including two\u0000new species: Ariosoma mesohellenica and Gnathophis elongatus. This fish assemblage, in conjunction with the\u0000accompanying molluscan assemblage, indicates a variable shelf\u0000paleoenvironment with easy access to the open ocean. Although available data\u0000on the Indo-Pacific fishes of the early Miocene are very limited, the fish\u0000fauna of the Mesohellenic Basin has many elements in common with the North\u0000Sea, the NE Atlantic, and the Paratethys.\u0000","PeriodicalId":48830,"journal":{"name":"Fossil Record","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2021-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46059495","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract. Acritus sutirca sp. nov. is described and illustrated from Eocene Baltic amber on the basis of one adult male specimen. As the first extinct member of the subfamily Abraeinae (Histeridae) and the smallest known fossil histerid specimen, this material was examined using a combination of light microscopy and X-ray micro-computed tomography (µCT). Internal features of the abdomen are well preserved, allowing us to study sclerotized parts of the aedeagus and illustrate these structures in detail. The current finding expands the range of known Histeridae diversity from the Eocene (48–34 Ma) “amber forests” of Europe. The absolute size limits and the probable average size for Baltic amber coleopteran inclusions are also briefly discussed (urn:lsid:zoobank.org:pub:A2B17479-8628-47C7-A8D4-3E0789BF088B).
{"title":"The first extinct species of Acritus LeConte, 1853 (Histeridae: Abraeinae) from Eocene Baltic amber: a microscopic beetle inclusion studied with X-ray micro-computed tomography","authors":"V. Alekseev, A. Bukejs","doi":"10.5194/FR-24-223-2021","DOIUrl":"https://doi.org/10.5194/FR-24-223-2021","url":null,"abstract":"Abstract. Acritus sutirca sp. nov. is described and illustrated from Eocene Baltic amber on\u0000the basis of one adult male specimen. As the first extinct member of the\u0000subfamily Abraeinae (Histeridae) and the smallest known fossil histerid\u0000specimen, this material was examined using a combination of light microscopy\u0000and X-ray micro-computed tomography (µCT). Internal features of the\u0000abdomen are well preserved, allowing us to study sclerotized parts of the\u0000aedeagus and illustrate these structures in detail. The current finding\u0000expands the range of known Histeridae diversity from the Eocene (48–34 Ma)\u0000“amber forests” of Europe. The absolute size limits and the probable\u0000average size for Baltic amber coleopteran inclusions are also briefly\u0000discussed (urn:lsid:zoobank.org:pub:A2B17479-8628-47C7-A8D4-3E0789BF088B).\u0000","PeriodicalId":48830,"journal":{"name":"Fossil Record","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2021-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45332483","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
O. Béthoux, Rowan E. Norrad, M. Stimson, Olivia A. King, L. Allen, Isabelle Deregnaucourt, S. Hinds, Jake H. Lewis, J. Schneider
Abstract. A stem relative of dragon- and damselflies, Brunellopteron norradi Béthoux, Deregnaucourt and Norrad gen. et sp. nov., is documented based on a specimen found at Robertson Point (Grand Lake, New Brunswick, Canada; Sunbury Creek Formation; early Moscovian, Pennsylvanian) and preserving the basal half of a hindwing. A comparative analysis of the evolution of wing venation in early odonates demonstrates that it belongs to a still poorly documented subset of species. Specifically, it displays a MP + CuA fusion, a CuA + CuP fusion, and a CuP + AA fusion, but it lacks the “extended” MP + Cu / CuA fusion and the “extended” (CuP / CuA + CuP) + AA fusion, the occurrence of which is typical of most Odonata, including Meganeura-like species. The occurrence of intercalary veins suggests that its closest relative might be Gallotypus oudardi Nel, Garrouste and Roques, 2008, from the Moscovian of northern France.
摘要龙蝇和豆娘的近亲，Brunellopteron norradi b thoux, Deregnaucourt和Norrad gen. et spnov .，是根据在Robertson Point (Grand Lake, New Brunswick,Canada)发现的标本记录下来的。Sunbury Creek地层;早期莫斯科人，宾夕法尼亚人)，保留了后翅基部的一半。一项对早期齿形动物翅脉进化的比较分析表明，它属于一个文献记载尚少的物种子集。具体表现为aMP + CuA融合、CuA + CuP融合和CuP + AA融合，但缺乏MP + Cu / CuA“扩展”融合和“扩展”(CuP / CuA + CuP) + AA融合，这是大多数蛇目动物(包括类巨动脉瘤)的典型融合。钙间静脉的出现表明，它最近的亲戚可能是来自法国北部莫斯科的beGallotypus oudardi Nel, Garrouste和Roques, 2008。
{"title":"A unique, large-sized stem Odonata (Insecta) found in the early Pennsylvanian of New Brunswick (Canada)","authors":"O. Béthoux, Rowan E. Norrad, M. Stimson, Olivia A. King, L. Allen, Isabelle Deregnaucourt, S. Hinds, Jake H. Lewis, J. Schneider","doi":"10.5194/FR-24-207-2021","DOIUrl":"https://doi.org/10.5194/FR-24-207-2021","url":null,"abstract":"Abstract. A stem relative of dragon- and damselflies,\u0000Brunellopteron norradi Béthoux, Deregnaucourt and Norrad gen. et sp. nov., is documented\u0000based on a specimen found at Robertson Point (Grand Lake, New Brunswick,\u0000Canada; Sunbury Creek Formation; early Moscovian, Pennsylvanian) and\u0000preserving the basal half of a hindwing. A comparative analysis of the\u0000evolution of wing venation in early odonates demonstrates that it belongs to\u0000a still poorly documented subset of species. Specifically, it displays a\u0000MP + CuA fusion, a CuA + CuP fusion, and a CuP + AA fusion, but it lacks the\u0000“extended” MP + Cu / CuA fusion and the “extended” (CuP / CuA + CuP) + AA fusion,\u0000the occurrence of which is typical of most Odonata, including Meganeura-like species. The\u0000occurrence of intercalary veins suggests that its closest relative might be\u0000Gallotypus oudardi Nel, Garrouste and Roques, 2008, from the Moscovian of northern France.","PeriodicalId":48830,"journal":{"name":"Fossil Record","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2021-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41511957","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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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