Abstract. Much work has been done on the study of vertebrate gaits over the past several decades and efforts undertaken to apply this to fossil tracks, especially dinosaurs and mammals such as cats, dogs, camels, and horses. This work seeks to expand upon such studies and in particular to study footprints laid down in sand by modern horses and apply such studies to determine the gaits of fossil horse trackways. It thus builds upon the work of Renders (1984a, b) and Kienapfel et al. (2014) and suggests additional measurements that can be taken on horse footprints. In this study the footprints left in the sand by 15 horses of various breeds with various gaits were videotaped, photographed, described, and measured in order to determine characteristics useful in distinguishing gaits. These results were then applied to two new sets of fossil footprints, those of the middle Miocene merychippine horse Scaphohippus intermontanus that I personally examined and measured and those from the late Pleistocene horse Equus conversidens, previously illustrated and described in the literature (McNeil et al., 2007). The latter horse exhibits a fast gallop of around 9.4 m/s, but it is the former whose footprints are quite unique. The quantitative and visual features of these prints are suggestive of a medium-fast gait involving apparent “understepping” of diagonal couplets and hind feet that overlap the centerline. The gait that most closely matches the footprints of Scaphohippus is the “artificial” gait of a slow rack or tolt, or pace, around 1.9 m/s, though an atypical trot of a horse with major conformation issues or which is weaving (swaying) from side to side is a less likely possibility. This intimates, along with the earlier study of Renders (1984a, b), who found the artificial gait of the running walk displayed by Pliocene hipparionine horses, that ancient horses possessed a much greater variety of gaits than modern horses and that over time they lost these abilities with the exception of certain gaited breeds.
摘要在过去的几十年里，人们对脊椎动物的步态进行了大量的研究，并努力将其应用于化石足迹，特别是恐龙和哺乳动物，如猫、狗、骆驼和马。这项工作旨在扩展这些研究，特别是研究现代马在沙子上留下的脚印，并将这些研究应用于确定化石马足迹的步态。因此，它建立在渲染(1984a, b)和Kienapfel等人(2014)的工作基础上，并建议可以对马脚印进行额外的测量。在这项研究中，我们对15匹不同品种、不同步态的马在沙地上留下的脚印进行了录像、拍照、描述和测量，以确定区分步态的有用特征。然后将这些结果应用于两组新的化石足迹，一组是我亲自检查和测量的中新世中马Scaphohippus intermontanus，另一组是来自晚更新世马Equus conversidens，之前在文献中有说明和描述(McNeil et al.， 2007)。后一匹马能以每秒9.4米的速度疾驰，但只有前一匹马的脚印才相当独特。这些脚印的数量和视觉特征表明，这是一种中速步态，包括对角对联的明显“下步”和后脚重叠在中心线上。与舟形马脚印最接近的步态是一种“人造”步态，大约1.9米/秒，尽管一匹有重大构象问题的非典型小跑或从一侧到另一侧编织(摇摆)的可能性较小。这表明，再加上早些时候的研究，发现上新世海马所展示的人造步态，古代马比现代马拥有更多种类的步态，随着时间的推移，除了某些有步态的品种外，它们失去了这些能力。
{"title":"Determining the gait of Miocene, Pliocene, and Pleistocene horses from fossilized trackways","authors":"A. Vincelette","doi":"10.5194/FR-24-151-2021","DOIUrl":"https://doi.org/10.5194/FR-24-151-2021","url":null,"abstract":"Abstract. Much work has been done on the study of vertebrate gaits over the past\u0000several decades and efforts undertaken to apply this to fossil tracks,\u0000especially dinosaurs and mammals such as cats, dogs, camels, and horses.\u0000This work seeks to expand upon such studies and in particular to study\u0000footprints laid down in sand by modern horses and apply such studies to\u0000determine the gaits of fossil horse trackways. It thus builds upon the work\u0000of Renders (1984a, b) and Kienapfel et al. (2014) and suggests additional\u0000measurements that can be taken on horse footprints. In this study the\u0000footprints left in the sand by 15 horses of various breeds with various\u0000gaits were videotaped, photographed, described, and measured in order to\u0000determine characteristics useful in distinguishing gaits. These results were\u0000then applied to two new sets of fossil footprints, those of the middle\u0000Miocene merychippine horse Scaphohippus intermontanus that I personally examined and measured and\u0000those from the late Pleistocene horse Equus conversidens, previously illustrated and described\u0000in the literature (McNeil et al., 2007). The latter horse exhibits a fast\u0000gallop of around 9.4 m/s, but it is the former whose footprints are quite\u0000unique. The quantitative and visual features of these prints are suggestive\u0000of a medium-fast gait involving apparent “understepping” of diagonal\u0000couplets and hind feet that overlap the centerline. The gait that most\u0000closely matches the footprints of Scaphohippus is the “artificial” gait of a slow\u0000rack or tolt, or pace, around 1.9 m/s, though an atypical trot of a horse\u0000with major conformation issues or which is weaving (swaying) from side to\u0000side is a less likely possibility. This intimates, along with the earlier\u0000study of Renders (1984a, b), who found the artificial gait of the running walk\u0000displayed by Pliocene hipparionine horses, that ancient horses possessed a\u0000much greater variety of gaits than modern horses and that over time they\u0000lost these abilities with the exception of certain gaited breeds.","PeriodicalId":48830,"journal":{"name":"Fossil Record","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2021-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41351320","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, M. Gimmel, Gabriela Packova, A. Bukejs, S. Blank
Abstract. Dascillidae are a species-poor beetle group with a scarce fossil record. Here, we describe Baltodascillus serraticornis gen. et sp. nov. based on a well-preserved specimen from Eocene Baltic amber. It differs from all known Dascillidae by its reduced mandibles. After studying the specimen using light microscopy and X-ray microtomography, we tentatively place this genus in the poorly defined subfamily Karumiinae based on the large eyes, serrate antennae, and lack of prosternal process. This is the first representative of the Dascillidae formally described from Baltic amber and the first described fossil member of the subfamily Karumiinae. We briefly discuss the problematic higher classification of Dascillidae, along with the morphology and biogeography of the group.
摘要Dascillidae是一个物种贫乏的甲虫群，化石记录很少。在这里，我们描述了Baltodascillus serraticornis gen. et sp. 11 .基于一个保存完好的始新世波罗的海琥珀标本。它与所有已知的滑蝇科的不同之处在于它的下颌骨缩小了。在使用光学显微镜和x射线显微断层扫描对标本进行研究后，我们根据大眼睛，锯齿状触角和缺乏前胸骨突初步将该属归入定义不明确的Karumiinae亚科。这是在波罗的海琥珀中被正式描述的dascillidae的第一个代表，也是Karumiinae亚科的第一个被描述的化石成员。我们简要地讨论了有问题的Dascillidae高级分类，以及该群体的形态和生物地理。
{"title":"A new enigmatic lineage of Dascillidae (Coleoptera: Elateriformia) from Eocene Baltic amber described using X-ray microtomography, with notes on Karumiinae morphology and classification","authors":"Robin Kundrata, M. Gimmel, Gabriela Packova, A. Bukejs, S. Blank","doi":"10.5194/FR-24-141-2021","DOIUrl":"https://doi.org/10.5194/FR-24-141-2021","url":null,"abstract":"Abstract. Dascillidae are a species-poor beetle group with a scarce\u0000fossil record. Here, we describe Baltodascillus serraticornis gen. et sp. nov. based on a well-preserved\u0000specimen from Eocene Baltic amber. It differs from all known Dascillidae by\u0000its reduced mandibles. After studying the specimen using light microscopy\u0000and X-ray microtomography, we tentatively place this genus in the poorly\u0000defined subfamily Karumiinae based on the large eyes, serrate antennae, and\u0000lack of prosternal process. This is the first representative of the\u0000Dascillidae formally described from Baltic amber and the first described\u0000fossil member of the subfamily Karumiinae. We briefly discuss the\u0000problematic higher classification of Dascillidae, along with the morphology\u0000and biogeography of the group.","PeriodicalId":48830,"journal":{"name":"Fossil Record","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2021-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48818938","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 genus, Palaeatalasis gen. nov. (type species P. monrosi sp. nov.), from the tribe Megamerini (Chrysomelidae: Sagrinae) from the early-middle Eocene Green River Formation is described and illustrated. The new genus is similar to the Recent Atalasis Lacordaire, 1845 but differs from it in the subparallel sides of the pronotum, metafemora without teeth, and non-emarginate eyes. It differs from the Eocene Eosagra Haupt, 1950 in the large, convex, non-emarginate eyes, wide elytra, and transverse pronotum. The new genus is distinguished from the Paleocene Gallopsis Legalov, Kirejtshuk et Nel, 2019 in the wide forehead and convex eyes. It is the first record of the Sagrinae from North America and the fourth known species of the family Chrysomelidae from the Green River.
摘要一个新属，Palaetalasis gen.nov.（模式种P.monrosi sp.nov.），来自始新世中期早期绿河地层的Megamerini部落（金花虫科：Sagrinae）。这一新属与1845年的RecentAtalasis Lacordaire属相似，但与之不同的是，前肢的近平行侧、没有牙齿的后股骨和非微缺眼。它与1950年始新世的Eosagra Haupt的不同之处在于大而凸、非微缺的眼睛、宽的鞘翅和横向的前足。新属与古新世Gallopsis Legalov，Kirejtshuk et Nel，2019在宽额和凸起方面有所不同。这是北美洲首次记录到仙人掌科，也是绿河金花虫科已知的第四个物种。
{"title":"First record of the subfamily Sagrinae (Coleoptera: Chrysomelidae) from the Eocene of North America","authors":"A. Legalov","doi":"10.5194/FR-24-135-2021","DOIUrl":"https://doi.org/10.5194/FR-24-135-2021","url":null,"abstract":"Abstract. A new genus, Palaeatalasis gen. nov. (type species P. monrosi sp. nov.), from the tribe Megamerini\u0000(Chrysomelidae: Sagrinae) from the early-middle Eocene Green River Formation\u0000is described and illustrated. The new genus is similar to the Recent\u0000Atalasis Lacordaire, 1845 but differs from it in the subparallel sides of the\u0000pronotum, metafemora without teeth, and non-emarginate eyes. It differs from\u0000the Eocene Eosagra Haupt, 1950 in the large, convex, non-emarginate eyes, wide\u0000elytra, and transverse pronotum. The new genus is distinguished from the Paleocene Gallopsis Legalov, Kirejtshuk et Nel, 2019 in the wide forehead and convex\u0000eyes. It is the first record of the Sagrinae from North America and the\u0000fourth known species of the family Chrysomelidae from the Green River.","PeriodicalId":48830,"journal":{"name":"Fossil Record","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2021-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43858666","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 polycentropodid caddisfly species is described from Miocene Dominican amber. The family Polycentropodidae is therefore represented in the Dominican amber with two species belonging to the genus Cernotina: C. pulchra Wichard, 2007, and C. fossilinova sp. nov. The endemic C. danieli Flint & Sykora, 2004, is the only representative of the genus occurring on Hispaniola today and is similar to the two fossil species. On the Caribbean islands altogether six extant species of the genus Cernotina are registered.
{"title":"The polycentropodid genus Cernotina (Insecta, Trichoptera) in Miocene Dominican amber","authors":"W. Wichard, C. Neumann","doi":"10.5194/FR-24-129-2021","DOIUrl":"https://doi.org/10.5194/FR-24-129-2021","url":null,"abstract":"Abstract. A new polycentropodid caddisfly species is described from Miocene\u0000Dominican amber. The family Polycentropodidae is therefore represented in\u0000the Dominican amber with two species belonging to the genus Cernotina: C. pulchra Wichard, 2007,\u0000and C. fossilinova sp. nov. The endemic C. danieli Flint & Sykora, 2004, is the only\u0000representative of the genus occurring on Hispaniola today and is similar to the\u0000two fossil species. On the Caribbean islands altogether six extant species\u0000of the genus Cernotina are registered.","PeriodicalId":48830,"journal":{"name":"Fossil Record","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2021-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43275575","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. Two new fossil species of Baltocar Kuschel, 1992 and Pseudomesauletes Legalov, 2001 (Curculionoidea: Rhynchitidae) are described from Eocene Baltic amber. Baltocar sontagae sp. nov. is similar to B. groehni Riedel, 2012 but differs in the shorter rostrum, tarsomere 1 shorter than tarsomere 5 and 1.4× as long as tarsomere 2, longer elytra, and shorter body. Pseudomesauletes lobanovi sp. nov. is similar to P. culex (Scudder, 1893) and P. ibis (Wickham, 1912): the new species differs from P. culex in the larger eyes, longer pronotum, being 0.44× shorter than elytra, and slightly smaller body size; from P. ibis it differs in the smaller body size, rostrum shorter than elytra, and weakly convex pronotum. This is the first record of Pseudomesauletes from Baltic amber and the sixth species of Baltocar. Keys to species of the genus Baltocar and to the Eocene species of the genus Pseudomesauletes are given. Assumed trophic relationships of these fossil taxa are discussed (urn:lsid:zoobank.org:pub:260EBE6E-DA6C-4D6D-A1D2-2C258224622F).
{"title":"Two new species of the family Rhynchitidae (Coleoptera: Curculionoidea) from Eocene Baltic amber, with key to species and assumed trophic relationships","authors":"A. Bukejs, A. Legalov","doi":"10.5194/FR-24-117-2021","DOIUrl":"https://doi.org/10.5194/FR-24-117-2021","url":null,"abstract":"Abstract. Two new fossil species of Baltocar Kuschel, 1992 and Pseudomesauletes Legalov, 2001 (Curculionoidea:\u0000Rhynchitidae) are described from Eocene Baltic amber. Baltocar sontagae sp. nov. is similar to\u0000B. groehni Riedel, 2012 but differs in the shorter rostrum, tarsomere 1 shorter\u0000than tarsomere 5 and 1.4× as long as tarsomere 2, longer elytra,\u0000and shorter body. Pseudomesauletes lobanovi sp. nov. is similar to P. culex (Scudder, 1893) and P. ibis\u0000(Wickham, 1912): the new species differs from P. culex in the larger eyes, longer\u0000pronotum, being 0.44× shorter than elytra, and slightly smaller body\u0000size; from P. ibis it differs in the smaller body size, rostrum shorter than\u0000elytra, and weakly convex pronotum. This is the first record of\u0000Pseudomesauletes from Baltic amber and the sixth species of Baltocar. Keys to species of the genus\u0000Baltocar and to the Eocene species of the genus Pseudomesauletes are given. Assumed trophic\u0000relationships of these fossil taxa are discussed (urn:lsid:zoobank.org:pub:260EBE6E-DA6C-4D6D-A1D2-2C258224622F).","PeriodicalId":48830,"journal":{"name":"Fossil Record","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2021-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48942581","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}
N. Abbassi, Masoumeh Khoshyar, S. Lucas, F. Esmaeili
Abstract. An extensive vertebrate tracksite from the middle–late Miocene Upper Red Formation in western Zanjan Province, northwestern Iran, provides new records of paleobiogeographical significance. These are records of common footprints of felids referred to as Felipeda lynxi Panin and Avram, canids referred to as Canipeda longigriffa Panin and Avram and less common bird footprints referred to as Iranipeda abeli Lambrecht. The Canipeda record establishes the late Miocene presence of canids on the Iranian Plateau as part of the Eurasia-wide “Eucyon event”. The Felipeda footprints are consistent with body fossil and footprint records elsewhere in Eurasia that indicate a widespread distribution of felids by late Miocene time. An unusual trace associated with the footprints is a large, shallow grazing or locomotion trace similar to Megaplanolites in some features but distinctive in various features and its occurrence in nonmarine facies, and it will be the subject of further study.
摘要伊朗西北部赞詹省西部中新世中晚期上红组的一个广泛的脊椎动物足迹提供了具有古生物地理学意义的新记录。这些是被称为Felipeda lynxi Panin和Avram的猫科动物的常见足迹记录，被称为Canipeda longigriffa Panin和Avram的犬科动物的足迹记录，以及被称为Iranipeda abeli Lambrecht的不太常见的鸟类足迹记录。犬科动物记录表明，作为欧亚大陆范围内“Eucyon事件”的一部分，伊朗高原上存在中新世晚期的犬科动物。Felipeda足迹与欧亚大陆其他地区的身体化石和足迹记录一致，表明到中新世晚期，猫科动物分布广泛。与脚印相关的一个不寻常的痕迹是一个大型浅放牧或运动痕迹，在某些特征上类似于巨平橄榄岩，但其独特的不变特征及其在非海相中的出现，这将是进一步研究的主题。
{"title":"Extensive vertebrate tracksite from the Upper Red Formation (middle–late Miocene), west Zanjan, northwestern Iran","authors":"N. Abbassi, Masoumeh Khoshyar, S. Lucas, F. Esmaeili","doi":"10.5194/FR-24-101-2021","DOIUrl":"https://doi.org/10.5194/FR-24-101-2021","url":null,"abstract":"Abstract. An extensive vertebrate tracksite from the middle–late\u0000Miocene Upper Red Formation in western Zanjan Province, northwestern Iran,\u0000provides new records of paleobiogeographical significance. These are records\u0000of common footprints of felids referred to as Felipeda lynxi Panin and Avram, canids\u0000referred to as Canipeda longigriffa Panin and Avram and less common bird footprints referred to as\u0000Iranipeda abeli Lambrecht. The Canipeda record establishes the late Miocene presence of canids on\u0000the Iranian Plateau as part of the Eurasia-wide “Eucyon event”. The\u0000Felipeda footprints are consistent with body fossil and footprint records elsewhere\u0000in Eurasia that indicate a widespread distribution of felids by late Miocene\u0000time. An unusual trace associated with the footprints is a large, shallow\u0000grazing or locomotion trace similar to Megaplanolites in some features but distinctive in\u0000various features and its occurrence in nonmarine facies, and it will be the\u0000subject of further study.","PeriodicalId":48830,"journal":{"name":"Fossil Record","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2021-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47268341","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. With a remarkable exception for the Mediterranean, the worldwide Pliocene record of true dolphins (Cetacea, Odontoceti, Delphinidae) remains scarce, in stark contrast with the large number of extant species testifying to the evolutionary success of this family. Based on a fragmentary skull discovered in lower Pliocene deposits (Zanclean, 5 to 4.4 Ma) of the Kattendijk Formation in the Antwerp harbour (Belgium, southern margin of the North Sea basin), we describe here a new delphinid species, Pliodelphis doelensis gen. et sp. nov. This small dolphin with cranial dimensions in the range of the short-beaked common dolphin Delphinus delphis can be distinguished from other extinct and extant delphinids by a combination of cranial features including the maxilla being significantly narrower than the premaxilla at a short distance anterior to the antorbital notch in dorsal view, the maximum opening of the mesorostral groove being located at the level of the antorbital notches, a transversely wide and anteroposteriorly long dorsal exposure of the presphenoid anterior to the bony nares, and all dorsal infraorbital foramina being located posterior to the premaxillary foramina. P. doelensis constitutes the first member of the family described from the early Pliocene of the North Sea basin and, for the whole North Atlantic realm, only the third outside the Mediterranean. This new record contributes thus to our understanding of the poorly known Pliocene radiation(s) of true dolphins.
{"title":"A new delphinid from the lower Pliocene of the North Sea and the early radiations of true dolphins","authors":"Alice Belluzzo, O. Lambert","doi":"10.5194/FR-24-77-2021","DOIUrl":"https://doi.org/10.5194/FR-24-77-2021","url":null,"abstract":"Abstract. With a remarkable exception for the Mediterranean, the worldwide\u0000Pliocene record of true dolphins (Cetacea, Odontoceti, Delphinidae) remains\u0000scarce, in stark contrast with the large number of extant species testifying\u0000to the evolutionary success of this family. Based on a fragmentary skull\u0000discovered in lower Pliocene deposits (Zanclean, 5 to 4.4 Ma) of the\u0000Kattendijk Formation in the Antwerp harbour (Belgium, southern margin of the\u0000North Sea basin), we describe here a new delphinid species, Pliodelphis doelensis gen. et sp.\u0000nov. This small dolphin with cranial dimensions in the range of the\u0000short-beaked common dolphin Delphinus delphis can be distinguished from other extinct and\u0000extant delphinids by a combination of cranial features including the maxilla\u0000being significantly narrower than the premaxilla at a short distance\u0000anterior to the antorbital notch in dorsal view, the maximum opening of the\u0000mesorostral groove being located at the level of the antorbital notches, a\u0000transversely wide and anteroposteriorly long dorsal exposure of the\u0000presphenoid anterior to the bony nares, and all dorsal infraorbital foramina\u0000being located posterior to the premaxillary foramina. P. doelensis constitutes the first\u0000member of the family described from the early Pliocene of the North Sea\u0000basin and, for the whole North Atlantic realm, only the third outside the\u0000Mediterranean. This new record contributes thus to our understanding of the\u0000poorly known Pliocene radiation(s) of true dolphins.","PeriodicalId":48830,"journal":{"name":"Fossil Record","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2021-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45667959","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 study of Baltic amber revealed a new fossil species of the genus Bacanius LeConte, 1853. Bacanius gorskii sp. nov. differs from the congener described previously from Eocene Rovno amber, B. kirejtshuki Sokolov and Perkovsky, in the shape of meso-metaventral suture, incomplete subhumeral stria, and the impunctate prosternal lobe (urn:lsid:zoobank.org:pub:EE9C6859-607A-4134-9037-8385601CF42F).
{"title":"A new Eocene Bacanius species (Histeridae: Dendrophilinae) from Baltic amber","authors":"V. Alekseev, A. Bukejs","doi":"10.5194/FR-24-93-2021","DOIUrl":"https://doi.org/10.5194/FR-24-93-2021","url":null,"abstract":"Abstract. A study of Baltic amber revealed a new fossil species of the genus\u0000Bacanius LeConte, 1853. Bacanius gorskii sp. nov. differs from the congener described previously from\u0000Eocene Rovno amber, B. kirejtshuki Sokolov and Perkovsky, in the shape of meso-metaventral\u0000suture, incomplete subhumeral stria, and the impunctate prosternal lobe (urn:lsid:zoobank.org:pub:EE9C6859-607A-4134-9037-8385601CF42F).","PeriodicalId":48830,"journal":{"name":"Fossil Record","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2021-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71234455","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}
G. Gasparini, Oscar F. Moreno-Mancilla, J. L. Cómbita
The species Selenogonus narinoensis was described by Stirton (1947) based on a single specimen which comes from sediments cropping out in the Cocha Verde locality, Nariño Department (Colombia), tentatively referred to the late Pliocene–Pleistocene (MGN 931; IGM p002118, Museo Geológico Nacional, Servicio Geológico Colombiano, Bogotá). However, morphological studies and comparative morphometric observations of the specimen suggest that (1) no diagnostic character supports the validity of the species Selenogonus narinoensis (here considered species inquirenda); (2) a combination of features (e.g., the mandibular condyle located behind the posterior edge of the vertical mandibular ramus, the angular process which projects laterally outwards, a bunolophodont crown morphology, a mesodont crown height, and a simple crown morphology of the third lobe of m3) indicates it belongs to the genus Platygonus; (3) this specimen corresponds to one of the largest South American peccaries; (4) taking into account certain anatomical characters as well as its morphometric range, this specimen is assigned to Platygonus cf. marplatensis. Even though the stratigraphic provenance of the specimen is still doubtful, it can be proposed that (1) it could be one of the most ancient records of tayassuids in South America, as would be expected given its geographical position, and (2) considering the new taxonomic proposal, this specimen represents the first record of Platygonus cf. marplatensis in Colombia and represents one of the northernmost South American records of the genus. This new interpretation would be of great relevance in the Great American Biotic Interchange due to its strategic geographical proximity to the Isthmus of Panama.
{"title":"Selenogonus narinoensis Stirton, 1947 (Tayassuidae, Cetartiodactyla, Mammalia): taxonomic status and paleobiogeographic implications","authors":"G. Gasparini, Oscar F. Moreno-Mancilla, J. L. Cómbita","doi":"10.5194/FR-24-65-2021","DOIUrl":"https://doi.org/10.5194/FR-24-65-2021","url":null,"abstract":"The species Selenogonus narinoensis was described by Stirton (1947) based on a single specimen which comes from sediments cropping out in the Cocha Verde locality, Nariño Department (Colombia), tentatively referred to the late Pliocene–Pleistocene (MGN 931; IGM p002118, Museo Geológico Nacional, Servicio Geológico Colombiano, Bogotá). However, morphological studies and comparative morphometric observations of the specimen suggest that (1) no diagnostic character supports the validity of the species Selenogonus narinoensis (here considered species inquirenda); (2) a combination of features (e.g., the mandibular condyle located behind the posterior edge of the vertical mandibular ramus, the angular process which projects laterally outwards, a bunolophodont crown morphology, a mesodont crown height, and a simple crown morphology of the third lobe of m3) indicates it belongs to the genus Platygonus; (3) this specimen corresponds to one of the largest South American peccaries; (4) taking into account certain anatomical characters as well as its morphometric range, this specimen is assigned to Platygonus cf. marplatensis. Even though the stratigraphic provenance of the specimen is still doubtful, it can be proposed that (1) it could be one of the most ancient records of tayassuids in South America, as would be expected given its geographical position, and (2) considering the new taxonomic proposal, this specimen represents the first record of Platygonus cf. marplatensis in Colombia and represents one of the northernmost South American records of the genus. This new interpretation would be of great relevance in the Great American Biotic Interchange due to its strategic geographical proximity to the Isthmus of Panama.","PeriodicalId":48830,"journal":{"name":"Fossil Record","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2021-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47872830","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 early Permian Meisenheim Formation of the Saar–Nahe Basin (Germany) is famous for its richness in vertebrate fossils, among which the temnospondyls were present with microvores and fish-eating apex predators. The latter trophic guild was occupied exclusively by the genus Sclerocephalus in that basin within a long time interval up to M8, whereas in M9, a new taxon, Glanochthon lellbachae, appeared. This taxon is defined by (1) a preorbital region 1.8–2.0 times as long as the postorbital skull table, (2) dermal ornament with tall radial ridges, (3) a prefrontal anteriorly wider with straight lateral margin, (4) a squamosal posteriorly only half as wide as the quadratojugal, (5) phalanges of manus and pes long and gracile, (6) carpals unossified in adults, and (7) tail substantially longer than skull and trunk combined. Phylogenetic analysis finds that G. lellbachae forms the basal sister taxon of the stratigraphically younger G. angusta and G. latirostre and that this clade nests within the paraphyletic taxon Sclerocephalus, with S. nobilis forming the sister taxon of the genus Glanochthon (urn:lsid:zoobank.org:act:3038F794-17B9-4FCA-B241-CCC3F4423651; registration date: 15 March 2021).
{"title":"Osteology of the Permian temnospondyl amphibian Glanochthon lellbachae and its relationships","authors":"R. Schoch","doi":"10.5194/FR-24-49-2021","DOIUrl":"https://doi.org/10.5194/FR-24-49-2021","url":null,"abstract":"Abstract. The early Permian Meisenheim Formation of the Saar–Nahe Basin\u0000(Germany) is famous for its richness in vertebrate fossils, among which the\u0000temnospondyls were present with microvores and fish-eating apex predators.\u0000The latter trophic guild was occupied exclusively by the genus\u0000Sclerocephalus in that basin within a long time interval up to M8, whereas in M9, a new\u0000taxon, Glanochthon lellbachae, appeared. This taxon is defined by (1) a preorbital region 1.8–2.0 times as long as the postorbital skull table, (2) dermal ornament with tall\u0000radial ridges, (3) a prefrontal anteriorly wider with straight lateral margin,\u0000(4) a squamosal posteriorly only half as wide as the quadratojugal, (5) phalanges\u0000of manus and pes long and gracile, (6) carpals unossified in adults, and (7) tail substantially longer than skull and trunk combined. Phylogenetic\u0000analysis finds that G. lellbachae forms the basal sister taxon of the stratigraphically\u0000younger G. angusta and G. latirostre and that this clade nests within the paraphyletic taxon\u0000Sclerocephalus, with S. nobilis forming the sister taxon of the genus Glanochthon (urn:lsid:zoobank.org:act:3038F794-17B9-4FCA-B241-CCC3F4423651; registration date: 15 March 2021).","PeriodicalId":48830,"journal":{"name":"Fossil Record","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2021-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42269812","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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