The record of fossil beavers from Miocene age strata in the Texas Coastal Plain is sparse. The first occurrence of fossil beavers is in Arikareean age faunas. One fossil beaver specimen was reported from a Hemingfordian fauna near Navasota, TX. Both Monosaulax and Anchitheriomys are described here from multiple early Barstovian faunas including a new taxon, Anchitheriomys buceei. The taxon, A. buceei, was a relatively large beaver, similar to A. fluminis in size, and shares characters with both A. fluminis and A. nanus. The holotype of Anchitheriomys buceei is a partial skull and endocast that preserves key features of the orbital foramina and palatine. Referred specimens include a partial dentary, isolated cheek teeth, and two post-cranial elements. The co-occurrence of this taxon and a small beaver identified as Monosaulax sp. in early Barstovian faunas is coeval with the first occurrence of proboscideans along the Texas Coastal Plain. Beavers are unknown in late Barstovian and Clarendonian faunas, although rodent fossils are uncommon from these faunas in general. Most of the fossil beaver specimens were obtained in the early twentieth century by collectors affiliated with Dr. Mark Francis at Texas A&M University, or with the State-Wide Paleontologic-Mineralogic Survey in Texas and are curated at the Texas Vertebrate Paleontology Collections. Archival materials housed at that facility have been instrumental in unraveling the history of collection, the distribution of localities and the evolving understanding of Miocene vertebrate biostratigraphy on the Texas Coastal Plain. Steven R. May, Jackson School Museum of Earth History, The University of Texas at Austin, Austin, Texas 78758, USA. srmay@utexas.edu Matthew A. Brown, Jackson School Museum of Earth History, The University of Texas at Austin, Austin, Texas 78758, USA. matthewbrown@utexas.edu
{"title":"Anchitheriomys buceei (Rodentia, Castoridae) from the Miocene of Texas and a review of the Miocene beavers from the Texas Coastal Plain, USA","authors":"S. May, Matthew Brown","doi":"10.26879/1236","DOIUrl":"https://doi.org/10.26879/1236","url":null,"abstract":"The record of fossil beavers from Miocene age strata in the Texas Coastal Plain is sparse. The first occurrence of fossil beavers is in Arikareean age faunas. One fossil beaver specimen was reported from a Hemingfordian fauna near Navasota, TX. Both Monosaulax and Anchitheriomys are described here from multiple early Barstovian faunas including a new taxon, Anchitheriomys buceei. The taxon, A. buceei, was a relatively large beaver, similar to A. fluminis in size, and shares characters with both A. fluminis and A. nanus. The holotype of Anchitheriomys buceei is a partial skull and endocast that preserves key features of the orbital foramina and palatine. Referred specimens include a partial dentary, isolated cheek teeth, and two post-cranial elements. The co-occurrence of this taxon and a small beaver identified as Monosaulax sp. in early Barstovian faunas is coeval with the first occurrence of proboscideans along the Texas Coastal Plain. Beavers are unknown in late Barstovian and Clarendonian faunas, although rodent fossils are uncommon from these faunas in general. Most of the fossil beaver specimens were obtained in the early twentieth century by collectors affiliated with Dr. Mark Francis at Texas A&M University, or with the State-Wide Paleontologic-Mineralogic Survey in Texas and are curated at the Texas Vertebrate Paleontology Collections. Archival materials housed at that facility have been instrumental in unraveling the history of collection, the distribution of localities and the evolving understanding of Miocene vertebrate biostratigraphy on the Texas Coastal Plain. Steven R. May, Jackson School Museum of Earth History, The University of Texas at Austin, Austin, Texas 78758, USA. srmay@utexas.edu Matthew A. Brown, Jackson School Museum of Earth History, The University of Texas at Austin, Austin, Texas 78758, USA. matthewbrown@utexas.edu","PeriodicalId":56100,"journal":{"name":"Palaeontologia Electronica","volume":"1 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69148221","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}
Majoidea are one of the most plesiomorphic clades of Eubrachyura and display a huge diversity in modern ecosystems. We describe one new fossil genus and three new species including Eoparanaxia eocenica n. gen. n. sp., Planobranchia elongata n. sp., Spinirostrimaia echinata n. sp.; and one indeterminate species tentatively assigned to Macrocheira sp. from the Pamplona Marls Formation (upper Eocene, southern Pyrenees, Spain). All of them are new or first reported from the Iberian Peninsula. This shows a highly diversified fauna associated with prodelta clays that favoured preservation of decapods and other invertebrates. Cluster analyses based on Jaccard and Raup-Crick coefficients of Eocene Majidae suggest close affinities of Iberia with other European basins. Fernando A. Ferratges. Departamento de Ciencias de la Tierra-IUCA, Universidad de Zaragoza, Zaragoza E-50009, Spain. fer.afk87@gmail.es orcid.org/0000-0002-9532-6972 Josep Lluis Domínguez. Padre Manjón, 12. 50010 Zaragoza, Spain. jl.domin@hotmail.com Àlex Ossó. Llorenç de Villalonga, 17B, 1-1 43007 Tarragona, Catalonia. aosso@tinet.cat orcid.org/0000-0003-2528-9915 Samuel Zamora. Instituto Geológico y Minero de España (IGME-CSIC), Residencia CSIC, Campus Aula Dei, Av. Montañana 1005, 50059 Zaragoza, Spain. s.zamora@igme.es orcid.org/0000-0002-3917-4628
大idea是真齿纲中最具半形性的分支之一，在现代生态系统中表现出巨大的多样性。报告了Eoparanaxia eoocenica n. gen. n. sp、Planobranchia elongata n. sp、Spinirostrimaia echinata n. sp等3个新种和1个新属;1种暂定为Macrocheira sp.，来自Pamplona Marls组(上始新世，比利牛斯山脉南部)。所有这些都是伊比利亚半岛新发现的或首次报告的。这表明与前三角洲粘土相关的高度多样化的动物群有利于保存十足类动物和其他无脊椎动物。基于始新世马吉达科Jaccard和Raup-Crick系数的聚类分析表明，伊比利亚盆地与欧洲其他盆地具有密切的亲缘关系。Fernando A. Ferratges。西班牙萨拉戈萨大学，西班牙萨拉戈萨E-50009。fer.afk87@gmail.es orcid.org/0000-0002-9532-6972何塞·路易斯Domínguez。Padre Manjón, 12岁。西班牙萨拉戈萨50010号jl.domin@hotmail.com Àlex Ossó。Llorenç de Villalonga, 17B, 1- 43007塔拉戈纳，加泰罗尼亚。aosso@tinet.cat orcid.org/0000-0003-2528-9915塞缪尔·萨莫拉。Geológico y Minero de España研究所(IGME-CSIC)， Residencia CSIC, Campus Aula Dei, Av. Montañana 1005, 50059 Zaragoza，西班牙。s.zamora@igme.es orcid.org/0000 - 0002 - 3917 - 4628
{"title":"Spider crabs (Decapoda: Brachyura: Majoidea) from the upper Eocene of south Pyrenees (Huesca, Spain)","authors":"F. Ferratges, J. L. Domínguez, À. Ossó, S. Zamora","doi":"10.26879/1270","DOIUrl":"https://doi.org/10.26879/1270","url":null,"abstract":"Majoidea are one of the most plesiomorphic clades of Eubrachyura and display a huge diversity in modern ecosystems. We describe one new fossil genus and three new species including Eoparanaxia eocenica n. gen. n. sp., Planobranchia elongata n. sp., Spinirostrimaia echinata n. sp.; and one indeterminate species tentatively assigned to Macrocheira sp. from the Pamplona Marls Formation (upper Eocene, southern Pyrenees, Spain). All of them are new or first reported from the Iberian Peninsula. This shows a highly diversified fauna associated with prodelta clays that favoured preservation of decapods and other invertebrates. Cluster analyses based on Jaccard and Raup-Crick coefficients of Eocene Majidae suggest close affinities of Iberia with other European basins. Fernando A. Ferratges. Departamento de Ciencias de la Tierra-IUCA, Universidad de Zaragoza, Zaragoza E-50009, Spain. fer.afk87@gmail.es orcid.org/0000-0002-9532-6972 Josep Lluis Domínguez. Padre Manjón, 12. 50010 Zaragoza, Spain. jl.domin@hotmail.com Àlex Ossó. Llorenç de Villalonga, 17B, 1-1 43007 Tarragona, Catalonia. aosso@tinet.cat orcid.org/0000-0003-2528-9915 Samuel Zamora. Instituto Geológico y Minero de España (IGME-CSIC), Residencia CSIC, Campus Aula Dei, Av. Montañana 1005, 50059 Zaragoza, Spain. s.zamora@igme.es orcid.org/0000-0002-3917-4628","PeriodicalId":56100,"journal":{"name":"Palaeontologia Electronica","volume":"1 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69148612","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}
We revisit recently described putative anseriform birds from the early Eocene London Clay of Walton-on-the-Naze (Essex, UK). Phylogenetically relevant skeletal elements of Danielsavis nazensis Houde et al., 2023 are reported that were omitted from the original description, including the pterygoids and palatines. We detail that anseriform affinities of D. nazensis are not strongly supported and that the species shares presumably derived characteristics with the Galliformes. Actually, it is not straightforward to determine whether Danielsavis is a galliform-like stem group anseriform or whether it represents an anseriform-like stem group galliform, and our re-analysis of an emended data matrix from the original description supported galliform affinities. If D. nazensis is an anseriform bird, it is the phylogenetically earliest-diverging currently known, and in view of its morphological distinctness, the species is here assigned to a new taxon (Danielsavidae, fam. nov.). Among the material that was previously likened to Danielsavis are various fossils, which are not from galloanserine birds. Some of these have cervical vertebrae with an unusual tuberculate surface and are assigned to Perplexicervix Mayr, 2010, within the new taxon Perplexicervicidae, fam. nov. A new species, P. paucituberculata, is described and postcranial elements that are tentatively referred to this species show a resemblance to the Otidiformes (bustards). If a classification into the Otidiformes is corroborated by future studies, the fossils would constitute the first formally described Paleogene record of this Old World group of birds. Gerald Mayr. Ornithological Section, Senckenberg Research Institute and Natural History Museum Frankfurt, Senckenberganlage 25, 60325 Frankfurt am Main, Germany, *Corresponding author Gerald.Mayr@senckenberg.de Vicen Carrió. Department of Natural Sciences, National Museums Scotland, Chambers Street, Edinburgh MAYR, CARRIÓ, & KITCHENER: BIRDS FROM THE LONDON CLAY 2 EH1 1JF, UK. v.carrio@nms.ac.uk Andrew C. Kitchener. Department of Natural Sciences, National Museums Scotland, Chambers Street, Edinburgh EH1 1JF, UK and School of Geosciences, University of Edinburgh, Drummond Street, Edinburgh EH8 9XP, UK. a.kitchener@nms.ac.uk
我们重新研究了最近描述的来自英国埃塞克斯郡沃尔顿-纳兹(walton -on- naze)的始新世早期伦敦粘土的假定的反形鸟类。据报道，Danielsavis nazensis Houde etal .， 2023的系统发育相关骨骼元件在原始描述中被省略，包括翼状体和腭。我们详细说明了D. nazensis的反形亲缘关系并没有得到强有力的支持，并且该物种可能与加利形类具有相同的衍生特征。实际上，要确定Danielsavis是一个类似于galliform的茎群反形，还是它代表了一个类似于反形的茎群反形，这并不简单，我们对原始描述的修正数据矩阵的重新分析支持了galliform的亲和力。如果D. nazensis是一种反形鸟类，它是目前已知的系统发育上最早分化的鸟类，鉴于其形态的独特性，该物种被分配到一个新的分类单元(Danielsavidae, fam)。11月)。在之前被比作丹尼尔萨维斯的材料中，有各种各样的化石，它们不是来自羚羊类鸟类。其中一些具有具有不寻常的结节状表面的颈椎，并被分配到Perplexicervix Mayr, 2010，在新的分类单元Perplexicervicidae, fam中。11 .描述了一个新种，P. paucituberculata，暂定为该物种的颅后成分显示出与耳形目(鸨)的相似之处。如果在未来的研究中，这些化石将成为第一个正式描述这一旧大陆鸟类群的古近纪记录。杰拉尔德·迈尔。法兰克福Senckenberg研究所和自然历史博物馆鸟类科，Senckenberg ganlage 25, 60325 Frankfurt am Main，德国，*通讯作者Gerald.Mayr@senckenberg.de Vicen Carrió。自然科学部，苏格兰国家博物馆，钱伯斯街，爱丁堡迈尔，CARRIÓ，和基奇纳:来自伦敦粘土的鸟类2 eh1jf，英国。v.carrio@nms.ac.uk Andrew C. Kitchener。苏格兰国家博物馆自然科学部，英国爱丁堡钱伯斯街EH1 1JF;爱丁堡大学地球科学学院，英国爱丁堡德拉蒙德街EH8 9XP。a.kitchener@nms.ac.uk
{"title":"On the “screamer-like” birds from the British London Clay: An archaic anseriform-galliform mosaic and a non-galloanserine “barb-necked” species of Perplexicervix","authors":"G. Mayr, Vicen Carrió, A. Kitchener","doi":"10.26879/1301","DOIUrl":"https://doi.org/10.26879/1301","url":null,"abstract":"We revisit recently described putative anseriform birds from the early Eocene London Clay of Walton-on-the-Naze (Essex, UK). Phylogenetically relevant skeletal elements of Danielsavis nazensis Houde et al., 2023 are reported that were omitted from the original description, including the pterygoids and palatines. We detail that anseriform affinities of D. nazensis are not strongly supported and that the species shares presumably derived characteristics with the Galliformes. Actually, it is not straightforward to determine whether Danielsavis is a galliform-like stem group anseriform or whether it represents an anseriform-like stem group galliform, and our re-analysis of an emended data matrix from the original description supported galliform affinities. If D. nazensis is an anseriform bird, it is the phylogenetically earliest-diverging currently known, and in view of its morphological distinctness, the species is here assigned to a new taxon (Danielsavidae, fam. nov.). Among the material that was previously likened to Danielsavis are various fossils, which are not from galloanserine birds. Some of these have cervical vertebrae with an unusual tuberculate surface and are assigned to Perplexicervix Mayr, 2010, within the new taxon Perplexicervicidae, fam. nov. A new species, P. paucituberculata, is described and postcranial elements that are tentatively referred to this species show a resemblance to the Otidiformes (bustards). If a classification into the Otidiformes is corroborated by future studies, the fossils would constitute the first formally described Paleogene record of this Old World group of birds. Gerald Mayr. Ornithological Section, Senckenberg Research Institute and Natural History Museum Frankfurt, Senckenberganlage 25, 60325 Frankfurt am Main, Germany, *Corresponding author Gerald.Mayr@senckenberg.de Vicen Carrió. Department of Natural Sciences, National Museums Scotland, Chambers Street, Edinburgh MAYR, CARRIÓ, & KITCHENER: BIRDS FROM THE LONDON CLAY 2 EH1 1JF, UK. v.carrio@nms.ac.uk Andrew C. Kitchener. Department of Natural Sciences, National Museums Scotland, Chambers Street, Edinburgh EH1 1JF, UK and School of Geosciences, University of Edinburgh, Drummond Street, Edinburgh EH8 9XP, UK. a.kitchener@nms.ac.uk","PeriodicalId":56100,"journal":{"name":"Palaeontologia Electronica","volume":"1 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69149056","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}
An intriguing pattern among extant lineages of vertebrates is the existence of depauperons: clades that have remained species-poor over huge time spans (i
{"title":"A large coelacanth, †Whiteia giganteus sp. nov., from the Triassic of Texas, USA, establishes a Pangean radiation of early Mesozoic actinistians","authors":"C. Brownstein","doi":"10.26879/1254","DOIUrl":"https://doi.org/10.26879/1254","url":null,"abstract":"An intriguing pattern among extant lineages of vertebrates is the existence of depauperons: clades that have remained species-poor over huge time spans (i","PeriodicalId":56100,"journal":{"name":"Palaeontologia Electronica","volume":"1 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69148386","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}
D. Morón-Alfonso, Marcela Cichowolski, René Hoffmann, D. Korn, V. Vennari, Ninon Allaire
Here we study the variation of the Paleozoic to Mesozoic ammonoid whorl profile shape (WPS, in previous contributions referred as the whorl cross-section shape) employing a geometric morphometric approach, virtual modelling, and statistical tools to assess possible biological phenomena. For this approach, a dataset covering 300 individuals (each belonging to a different genus) was generated from revised specimens and published literature data. From this dataset, we proposed several predictors (e
{"title":"The intriguing shapes of the ammonoid whorl","authors":"D. Morón-Alfonso, Marcela Cichowolski, René Hoffmann, D. Korn, V. Vennari, Ninon Allaire","doi":"10.26879/1263","DOIUrl":"https://doi.org/10.26879/1263","url":null,"abstract":"Here we study the variation of the Paleozoic to Mesozoic ammonoid whorl profile shape (WPS, in previous contributions referred as the whorl cross-section shape) employing a geometric morphometric approach, virtual modelling, and statistical tools to assess possible biological phenomena. For this approach, a dataset covering 300 individuals (each belonging to a different genus) was generated from revised specimens and published literature data. From this dataset, we proposed several predictors (e","PeriodicalId":56100,"journal":{"name":"Palaeontologia Electronica","volume":"1 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69148595","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}
New cranial and postcranial (including shell and thin sections) material of the baenid turtle “Trinitichelys” maini is described and the species is taxonomically revised and referred to a new genus, Gehennachelys. The hypodigm of G. maini is expanded to include informative specimens allowing for a more comprehensive morphological understanding and shell reconstruction, as well as more thorough comparisons with confamilials.This taxon is phylogenetically placed at the base of Baenodda. Gehennachelys maini comb. nov. lacks a contribution of the posteriormost vertebral scale to the carapace margin and an omega-shaped femoral-anal sulcus, both historically regarded as baenodd synapomorphies, despite showing derived cranial characters for Baenodda. This inconsistency challenges the utility of these traits in diagnosing baenodds and highlights problems in resolving baenid relationships. Gehennachelys demonstrates that baenodds evolved as early as the middle Cenomanian, and it likely dispersed to southwestern Appalachia during a regression in the early Cenomanian, becoming the terminal baenid from the eastern North American landmass. Brent Adrian. Institute of Human Origins, School of Human Evolution and Social Change, 900 S. Cady Mall, Tempe, Arizona, 85287 USA. badrian@asu.edu Heather F. Smith. Department of Anatomy, 19555 N. 59th Avenue, Midwestern University, Glendale, Arizona 85308 USA. hsmith@midwestern.edu Christopher R. Noto. Department of Biological Sciences, University of Wisconsin Parkside, Kenosha, Wisconsin, 53141, USA. noto@uwp.edu
描述了贝尼龟“Trinitichelys”maini的新颅骨和颅骨后(包括壳和薄片)材料，并对该物种进行了分类修订，并将其归入新属Gehennachelys。maini的次类被扩展到包括信息丰富的标本，允许更全面的形态学理解和壳重建，以及更彻底的与同科的比较。在系统发育上，这个分类群被置于Baenodda的基部。Gehennachelys主梳。11 .缺乏对甲壳缘的最后方椎体鳞片和ω形股肛沟的贡献，尽管显示出Baenodda的衍生颅骨特征，但两者在历史上都被认为是Baenodda的突触型。这种不一致挑战了这些特征在诊断性别歧视中的效用，并突出了解决性别歧视关系中的问题。Gehennachelys证明baenodds早在Cenomanian中期就开始进化了，并且很可能在Cenomanian早期的退行中分散到阿巴拉契亚西南部，成为北美东部大陆的最终baenid。布伦特艾德里安。人类起源研究所，人类进化与社会变革学院，900 S. Cady Mall, Tempe, Arizona, 85287 USA。badrian@asu.edu Heather F. Smith。美国亚利桑那州格兰代尔市中西部大学59大道19555号解剖学系85308 USAhsmith@midwestern.edu克里斯托弗·r·诺托。威斯康辛大学帕克赛德分校生物科学系，美国威斯康辛州基诺沙53141noto@uwp.edu
{"title":"A revision of “Trinitichelys” maini (Testudinata: Baenidae) and additional material of its new genus from the Lewisville Formation (Woodbine Group, Cenomanian), Texas, USA","authors":"Brent Adrian, H. Smith, Christopher R. Noto","doi":"10.26879/1266","DOIUrl":"https://doi.org/10.26879/1266","url":null,"abstract":"New cranial and postcranial (including shell and thin sections) material of the baenid turtle “Trinitichelys” maini is described and the species is taxonomically revised and referred to a new genus, Gehennachelys. The hypodigm of G. maini is expanded to include informative specimens allowing for a more comprehensive morphological understanding and shell reconstruction, as well as more thorough comparisons with confamilials.This taxon is phylogenetically placed at the base of Baenodda. Gehennachelys maini comb. nov. lacks a contribution of the posteriormost vertebral scale to the carapace margin and an omega-shaped femoral-anal sulcus, both historically regarded as baenodd synapomorphies, despite showing derived cranial characters for Baenodda. This inconsistency challenges the utility of these traits in diagnosing baenodds and highlights problems in resolving baenid relationships. Gehennachelys demonstrates that baenodds evolved as early as the middle Cenomanian, and it likely dispersed to southwestern Appalachia during a regression in the early Cenomanian, becoming the terminal baenid from the eastern North American landmass. Brent Adrian. Institute of Human Origins, School of Human Evolution and Social Change, 900 S. Cady Mall, Tempe, Arizona, 85287 USA. badrian@asu.edu Heather F. Smith. Department of Anatomy, 19555 N. 59th Avenue, Midwestern University, Glendale, Arizona 85308 USA. hsmith@midwestern.edu Christopher R. Noto. Department of Biological Sciences, University of Wisconsin Parkside, Kenosha, Wisconsin, 53141, USA. noto@uwp.edu","PeriodicalId":56100,"journal":{"name":"Palaeontologia Electronica","volume":"1 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69148605","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}
Amber is formed by tree resins in terrestrial habitats. Therefore, a preservation of animals living in water in amber may appear surprising. Still more and more finds of such animals were reported in recent years. The central question around these finds is, whether the animals became entrapped in the resin in their original habitat (in situ)
{"title":"Unique fossils of caddisfly larvae from Baltic amber and in situ amber formation in aquatic ecosystems","authors":"V. Baranov, J. Hammel, C. Gröhn, J. Haug","doi":"10.26879/1278","DOIUrl":"https://doi.org/10.26879/1278","url":null,"abstract":"Amber is formed by tree resins in terrestrial habitats. Therefore, a preservation of animals living in water in amber may appear surprising. Still more and more finds of such animals were reported in recent years. The central question around these finds is, whether the animals became entrapped in the resin in their original habitat (in situ)","PeriodicalId":56100,"journal":{"name":"Palaeontologia Electronica","volume":"24 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69148668","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}
Brooke A. Bogan, R. Martindale, R. Feldmann, C. Schweitzer, Drew Muscente
{"title":"Morphological insights into the lobster genus Uncina Quenstedt, 1851 based on new material from the Ya Ha Tinda Konservat-Lagerstätte, Canada (Early Jurassic)","authors":"Brooke A. Bogan, R. Martindale, R. Feldmann, C. Schweitzer, Drew Muscente","doi":"10.26879/1158","DOIUrl":"https://doi.org/10.26879/1158","url":null,"abstract":"","PeriodicalId":56100,"journal":{"name":"Palaeontologia Electronica","volume":"1 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69146984","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}
M. Schade, O. Rauhut, C. Foth, Olof Moleman, Serjoscha W. Evers
{"title":"A reappraisal of the cranial and mandibular osteology of the spinosaurid Irritator challengeri (Dinosauria: Theropoda)","authors":"M. Schade, O. Rauhut, C. Foth, Olof Moleman, Serjoscha W. Evers","doi":"10.26879/1242","DOIUrl":"https://doi.org/10.26879/1242","url":null,"abstract":"","PeriodicalId":56100,"journal":{"name":"Palaeontologia Electronica","volume":"1 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69148305","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}
The Solnhofen archipelago of southern Germany has produced hundreds of fossils of pterosaurs in the last 250 years. In addition to recent descriptions and taxonomic revisions of existing specimens, new fossils continue to be uncovered and this includes important new material. In this paper we describe a mostly complete specimen of a ctenochasmatid pterosaur, which is one of the largest known pterosaurs from the Solnhofen area and one of the largest pterodactyloids in the Jurassic (wingspan estimated at c. 2.1 m). It also has one of the largest bony crests of any Jurassic pterosaur, and also has an unusual combination of short and spike-like teeth with an expanded frontoparietal crest that would have given it a strong bite despite the long and low skull. The nature of the specimen, mostly complete but almost entirely disarticulated, is unusual for the region. Despite well over two centuries of discovery, new pterosaurs continue to be discovered in these critical deposits that add to our knowledge of their diversity and ecology. David W.E. Hone. School of Biological and Behavioural Sciences, Queen Mary University of London, Mile End Road, London, E1 4NS, UK. d.hone@qmul.ac.uk René Lauer. Lauer Foundation for Paleontology, Science and Education, Wheaton, Illinois, USA. rene@lauerfoundationpse.org Bruce Lauer. Lauer Foundation for Paleontology, Science and Education, Wheaton, Illinois, USA. bruce@lauerfoundationpse.org Frederik Spindler. Dinosaurier Museum Altmühltal, Dinopark 1, 85095 Denkendorf, Germany. mail@frederik-spindler.de
在过去的250年里，德国南部的索恩霍芬群岛出土了数百块翼龙化石。除了最近对现有标本的描述和分类修订外，还不断发现新的化石，其中包括重要的新材料。主要在本文中,我们描述一个完整的ctenochasmatid标本翼龙,这是一个已知的最大的翼龙Solnhofen面积最大的一个pterodactyloids侏罗纪(估计c翼展2.1米)。它还有一个最大的骨波峰的侏罗纪翼龙,也有一个不寻常的特殊短和牙齿扩大frontoparietal波峰,要求获得一个强大的咬尽管长和较低的头骨。标本的性质，大部分完整，但几乎完全脱节，是不寻常的地区。尽管经过了两个多世纪的发现，新的翼龙在这些重要的沉积物中不断被发现，这增加了我们对其多样性和生态学的了解。大卫·w·e·Hone。伦敦玛丽女王大学生物与行为科学学院，英国伦敦E1 4NS, Mile End Roadd.hone@qmul.ac.uk雷纳·劳尔。劳尔古生物学、科学与教育基金会，美国伊利诺斯州惠顿。rene@lauerfoundationpse.org布鲁斯·劳尔。劳尔古生物学、科学与教育基金会，美国伊利诺斯州惠顿。bruce@lauerfoundationpse.org弗雷德里克·斯平德勒。恐龙博物馆，德国登肯多夫，恐龙公园185095。mail@frederik-spindler.de
{"title":"Petrodactyle wellnhoferi gen. et sp. nov.: A new and large ctenochasmatid pterosaur from the Late Jurassic of Germany","authors":"D. Hone, R. Lauer, Bruce Lauer, F. Spindler","doi":"10.26879/1251","DOIUrl":"https://doi.org/10.26879/1251","url":null,"abstract":"The Solnhofen archipelago of southern Germany has produced hundreds of fossils of pterosaurs in the last 250 years. In addition to recent descriptions and taxonomic revisions of existing specimens, new fossils continue to be uncovered and this includes important new material. In this paper we describe a mostly complete specimen of a ctenochasmatid pterosaur, which is one of the largest known pterosaurs from the Solnhofen area and one of the largest pterodactyloids in the Jurassic (wingspan estimated at c. 2.1 m). It also has one of the largest bony crests of any Jurassic pterosaur, and also has an unusual combination of short and spike-like teeth with an expanded frontoparietal crest that would have given it a strong bite despite the long and low skull. The nature of the specimen, mostly complete but almost entirely disarticulated, is unusual for the region. Despite well over two centuries of discovery, new pterosaurs continue to be discovered in these critical deposits that add to our knowledge of their diversity and ecology. David W.E. Hone. School of Biological and Behavioural Sciences, Queen Mary University of London, Mile End Road, London, E1 4NS, UK. d.hone@qmul.ac.uk René Lauer. Lauer Foundation for Paleontology, Science and Education, Wheaton, Illinois, USA. rene@lauerfoundationpse.org Bruce Lauer. Lauer Foundation for Paleontology, Science and Education, Wheaton, Illinois, USA. bruce@lauerfoundationpse.org Frederik Spindler. Dinosaurier Museum Altmühltal, Dinopark 1, 85095 Denkendorf, Germany. mail@frederik-spindler.de","PeriodicalId":56100,"journal":{"name":"Palaeontologia Electronica","volume":"1 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69148313","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：