The trilobite faunas that occur with the Steptoean Positive Isotope Carbon Excursion (SPICE) at Smithfield Canyon, Utah, have been reported, but not illustrated. Given the importance of the SPICE at this section for international correlations, the trilobites from new collections from the upper Nounan Dolomite to lower St. Charles Formation at Smithfield Canyon are reported herein and integrated with the previously reported taxa. Trilobite assemblages indicate that the upper Cedaria to the Ellipsocephaloides biozones (Miaolingian Series, Guzhangian Stage to Furongian Series, Jiangshanian Stage) are present stratigraphically below or above the SPICE. Some of the taxa reported herein may represent new species, but they are not represented by well-enough preserved specimens and are left in open nomenclature. However, Kingstonia smithfieldensis n. sp. and Bromella utahensis n. sp. are named on the basis of common and well-preserved specimens. New carbon isotope data from Smithfield Canyon from an overlapping section of the lower St. Charles Formation, that add to the overall shape of the SPICE curve, are presented. The new δ13C values above the Elvinia Biozone range from –0.36‰ to +1.5‰, confirming that the SPICE concludes within the Elvinia Biozone. UUID: http://zoobank.org/ad4fd372-8da4-4caa-98ed-ea82700cca60
犹他州史密斯菲尔德峡谷（Smithfield Canyon）的斯蒂普托恩正同位素碳考察（SPICE）所发现的三叶虫动物群已有报道，但没有图示。鉴于该地段的 SPICE 对国际关联的重要性，本文报告了从史密斯菲尔德峡谷的上努南白云岩到下圣查尔斯地层新采集的三叶虫，并将其与之前报告的类群整合在一起。三叶虫的组合表明，上Cedaria至Ellipsocephaloides生物带（古丈阶庙岭系至江山阶芙蓉系）在地层上存在于SPICE之下或之上。本文报告的一些类群可能是新种，但由于没有足够的标本保存，因此暂不命名。不过，Kingstonia smithfieldensis n. sp.和 Bromella utahensis n. sp.是根据常见且保存完好的标本命名的。本文介绍了来自史密斯菲尔德峡谷的新碳同位素数据，这些数据来自圣查尔斯地层下部的一个重叠部分，它们增加了 SPICE 曲线的整体形状。新的δ13C值在Elvinia生物区之上，范围从-0.36‰到+1.5‰，证实了SPICE在Elvinia生物区内的结论。UUID: http://zoobank.org/ad4fd372-8da4-4caa-98ed-ea82700cca60
{"title":"Cambrian trilobites from the Nounan Dolomite and lower St. Charles Formation (upper Marjuman to lower Sunwaptan; Miaolingian to Furongian Series), Smithfield Canyon, northern Utah","authors":"F. Sundberg, H. Cothren, Carol M. Dehler","doi":"10.1017/jpa.2023.48","DOIUrl":"https://doi.org/10.1017/jpa.2023.48","url":null,"abstract":"\u0000 The trilobite faunas that occur with the Steptoean Positive Isotope Carbon Excursion (SPICE) at Smithfield Canyon, Utah, have been reported, but not illustrated. Given the importance of the SPICE at this section for international correlations, the trilobites from new collections from the upper Nounan Dolomite to lower St. Charles Formation at Smithfield Canyon are reported herein and integrated with the previously reported taxa. Trilobite assemblages indicate that the upper Cedaria to the Ellipsocephaloides biozones (Miaolingian Series, Guzhangian Stage to Furongian Series, Jiangshanian Stage) are present stratigraphically below or above the SPICE.\u0000 Some of the taxa reported herein may represent new species, but they are not represented by well-enough preserved specimens and are left in open nomenclature. However, Kingstonia smithfieldensis n. sp. and Bromella utahensis n. sp. are named on the basis of common and well-preserved specimens.\u0000 New carbon isotope data from Smithfield Canyon from an overlapping section of the lower St. Charles Formation, that add to the overall shape of the SPICE curve, are presented. The new δ13C values above the Elvinia Biozone range from –0.36‰ to +1.5‰, confirming that the SPICE concludes within the Elvinia Biozone.\u0000 UUID: http://zoobank.org/ad4fd372-8da4-4caa-98ed-ea82700cca60","PeriodicalId":50098,"journal":{"name":"Journal of Paleontology","volume":"9 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2024-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139439089","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}
Atzcalli Ehécatl Hernández-Cisneros, T. Schwennicke, Heriberto Rochín-Bañaga, Cheng‐Hsiu Tsai
Among the several evolutionary lineages of the baleen whales (Mysticeti), the eomysticetids are an ancient successful family that retain possibly nonfunctional teeth and functional baleen, a transitional stage between toothed and baleen-assisted filter-feeding mysticetes. The patchy fossil record leaves gaps in eomysticetid paleobiology interpretations, but their diversity and widespread geographical distribution can be a relevant proxy to understanding the evolution of crown Mysticeti. Here we describe a new baleen whale, Echericetus novellus n. gen. n. sp., from the Oligocene of Mexico (slightly older than 27.95 million years ago). This new taxon has morphological features that show its affinity to Eomysticetidae, such as the intertemporal region longer than wide, the elongate and oval temporal fossa, and a well-developed and lobate coronoid process of the mandible. Similarly, our cladistic analyses confirm the inclusion of Echericetus in the Eomysticetidae. Echericetus reinforces our notion of the eomysticetid diversity and disparity. Geographically, the existence of Echericetus from Mexico also indicates that eomysticetid inhabited subtropical regions in the Northern Hemisphere. Last, our discovery of a new eomysticetid from the Oligocene of Mexico provides new insights into the distribution patterns and habitat use of Eomysticetidae, essential to further explain the demise of this transitional lineage between toothed and baleen-bearing whales. UUID: http://zoobank.org/00cfc802-e2da-465c-9bb6-59347be00164
在须鲸（Mysticeti）的几个演化世系中，无须鲸是一个古老而成功的家族，它们可能保留了无功能的牙齿和功能性须，是有齿和须辅助滤食的神秘鲸类之间的过渡阶段。零星的化石记录为贻贝古生物学的解释留下了空白，但它们的多样性和广泛的地理分布可以作为了解冠贻贝演化的相关代表。在这里，我们描述了墨西哥渐新世（略早于 2795 万年前）的一种新须鲸--Echericetus novellus n. gen.这一新类群的形态特征表明它与Eomysticetidae亲缘关系密切，如颞区长于宽、颞窝细长且呈椭圆形、下颌骨冠状突发达且呈叶状等。同样，我们的支系分析也证实了 Echericetus 属于 Eomysticetidae。Echericetus加强了我们对Eomysticetid多样性和差异性的认识。从地理位置上看，墨西哥Echericetus的存在也表明，Eomysticetid栖息于北半球的亚热带地区。最后，我们在墨西哥渐新世发现的一种新的蜕皮鲸为蜕皮鲸科的分布模式和栖息地利用提供了新的视角，对于进一步解释这一介于齿鲸和须鲸之间的过渡类群的消亡至关重要。UUID: http://zoobank.org/00cfc802-e2da-465c-9bb6-59347be00164
{"title":"Echericetus novellus n. gen. n. sp. (Cetacea, Mysticeti, Eomysticetidae), an Oligocene baleen whale from Baja California Sur, Mexico","authors":"Atzcalli Ehécatl Hernández-Cisneros, T. Schwennicke, Heriberto Rochín-Bañaga, Cheng‐Hsiu Tsai","doi":"10.1017/jpa.2023.80","DOIUrl":"https://doi.org/10.1017/jpa.2023.80","url":null,"abstract":"\u0000 Among the several evolutionary lineages of the baleen whales (Mysticeti), the eomysticetids are an ancient successful family that retain possibly nonfunctional teeth and functional baleen, a transitional stage between toothed and baleen-assisted filter-feeding mysticetes. The patchy fossil record leaves gaps in eomysticetid paleobiology interpretations, but their diversity and widespread geographical distribution can be a relevant proxy to understanding the evolution of crown Mysticeti. Here we describe a new baleen whale, Echericetus novellus n. gen. n. sp., from the Oligocene of Mexico (slightly older than 27.95 million years ago). This new taxon has morphological features that show its affinity to Eomysticetidae, such as the intertemporal region longer than wide, the elongate and oval temporal fossa, and a well-developed and lobate coronoid process of the mandible. Similarly, our cladistic analyses confirm the inclusion of Echericetus in the Eomysticetidae. Echericetus reinforces our notion of the eomysticetid diversity and disparity. Geographically, the existence of Echericetus from Mexico also indicates that eomysticetid inhabited subtropical regions in the Northern Hemisphere. Last, our discovery of a new eomysticetid from the Oligocene of Mexico provides new insights into the distribution patterns and habitat use of Eomysticetidae, essential to further explain the demise of this transitional lineage between toothed and baleen-bearing whales.\u0000 UUID: http://zoobank.org/00cfc802-e2da-465c-9bb6-59347be00164","PeriodicalId":50098,"journal":{"name":"Journal of Paleontology","volume":"16 11","pages":""},"PeriodicalIF":1.4,"publicationDate":"2024-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139389354","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}
Austin J. Ashbaugh, Craig S. Scott, Gregory P. Wilson Mantilla, Jessica M. Theodor
Although knowledge of their fossil record continues to improve, multituberculates nonetheless remain one of the more poorly understood mammalian clades, which can be attributed to a record comprised of isolated teeth and fragmentary jaws. Fortunately, the p4 of multituberculates is the most common form of remains for this group and is a principal source of diagnostic characters in systematic studies, the p4 of cimolodontan multituberculates is both common and a source of diagnostic characters in systematic studies. The results of a recent morphometric study on the neoplagiaulacid Mesodma suggest that p4 size may be more useful than shape in diagnosing the various species referred to this genus. We tested this hypothesis by applying two different morphometric methods (2D geometric morphometrics and linear measurements) to two samples: (1) one including the p4s of four known species of Mesodma (M. ambigua, M. thompsoni, M. formosa, and M. pygmaea), and (2) a sample of unidentified p4s of Mesodma from the Bug Creek Anthills locality of northeastern Montana. Our results indicate that while form explains most of the morphological variation in p4s of the various species of Mesodma, linear-measurement data support differences in p4 morphology that are not recovered by form data alone. Depending on the methods used, we found evidence for the presence of one or more species of Mesodma in the Bug Creek Anthills fauna. Although shape and size both contribute to morphological variation in the p4 of Mesodma, our results suggest that the diagnostic power of each varies with the type of methodology employed.
{"title":"Species discrimination in the multituberculate Mesodma Jepsen, 1940 (Mammalia, Allotheria): considerations of size, shape, and form","authors":"Austin J. Ashbaugh, Craig S. Scott, Gregory P. Wilson Mantilla, Jessica M. Theodor","doi":"10.1017/jpa.2023.76","DOIUrl":"https://doi.org/10.1017/jpa.2023.76","url":null,"abstract":"\u0000 Although knowledge of their fossil record continues to improve, multituberculates nonetheless remain one of the more poorly understood mammalian clades, which can be attributed to a record comprised of isolated teeth and fragmentary jaws. Fortunately, the p4 of multituberculates is the most common form of remains for this group and is a principal source of diagnostic characters in systematic studies, the p4 of cimolodontan multituberculates is both common and a source of diagnostic characters in systematic studies. The results of a recent morphometric study on the neoplagiaulacid Mesodma suggest that p4 size may be more useful than shape in diagnosing the various species referred to this genus. We tested this hypothesis by applying two different morphometric methods (2D geometric morphometrics and linear measurements) to two samples: (1) one including the p4s of four known species of Mesodma (M. ambigua, M. thompsoni, M. formosa, and M. pygmaea), and (2) a sample of unidentified p4s of Mesodma from the Bug Creek Anthills locality of northeastern Montana. Our results indicate that while form explains most of the morphological variation in p4s of the various species of Mesodma, linear-measurement data support differences in p4 morphology that are not recovered by form data alone. Depending on the methods used, we found evidence for the presence of one or more species of Mesodma in the Bug Creek Anthills fauna. Although shape and size both contribute to morphological variation in the p4 of Mesodma, our results suggest that the diagnostic power of each varies with the type of methodology employed.","PeriodicalId":50098,"journal":{"name":"Journal of Paleontology","volume":"29 4","pages":""},"PeriodicalIF":1.4,"publicationDate":"2024-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139451508","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}
R. Werneburg, F. Witzmann, Larry Rinehart, Jan Fischer, Sebastian Voigt
A new eryopid temnospondyl, Stenokranio boldi n. gen. n. sp. is described based on well-preserved cranial and postcranial material from fluvio-lacustrine deposits of the Permo-Carboniferous (Gzhelian/Asselian) Remigiusberg Formation at the Remigiusberg quarry near Kusel, Saar–Nahe Basin, southwest Germany. The new taxon is characterized by three autapomorphies within the Eryopidae: (1) the relatively narrow posterior skull table, therefore nearly parallel lateral margins of the skull; (2) the short postparietals and tabulars; and (3) the wide ectopterygoid. Phylogenetic analysis reveals a monophyletic Eryopidae with the basal taxa Osteophorus, Glaukerpeton, and Onchiodon labyrinthicus forming a polytomy. Actinodon may be either a basal eryopid or a stereospondylomorph, and the genus Onchiodon is not monophyletic. Stenokranio n. gen. is found as a more derived eryopid forming the sister taxon to Eryops. Stenokranio n. gen. was among the largest predators of the Saar–Nahe Basin. Its semiaquatic lifestyle enabled Stenokranio n. gen. to browse riverbanks and lake shorelines for prey, but most likely it fed on aquatic vertebrates. Stenokranio n. gen. was part of a faunal assemblage of aquatic, semiaquatic, and fully terrestrial vertebrates, such as sarcopterygian and actinopterygian fishes, xenacanthid sharks, a dvinosaurian temnospondyl, different “lepospondyls”, diadectomorphs, and synapsids. This is in general accordance with the vertebrate community from the Permo-Carboniferous of North America and from the early Permian localities of Manebach (Thuringian Forest Basin) and Niederhäslich (Döhlen Basin). It is notable that the occurrence of Stenokranio n. gen. and other eryopids in these localities excluded the presence of other large temnospondyls such as Sclerocephalus. However, a previously described isolated eryopid mandible from the Remigiusberg locality differs from that of Stenokranio n. gen. in several characters, implying that probably two different eryopid taxa lived at the same locality. UUID: www.zoobank.org/88a52547-d6fc-40af-965c-a6786c252ed5
根据德国西南部萨尔-纳河盆地库塞尔附近雷米吉斯贝格采石场的二叠石炭纪（格泽尔/阿塞尔纪）雷米吉斯贝格地层中保存完好的头骨和颅后材料，描述了一种新的红腹角鲨类（Stenokranio boldi n. gen. n. sp）。这一新类群在蝼蛄类中具有三个自同形特征：(1) 相对狭窄的后颅骨台，因此头骨的侧缘几乎平行；(2) 较短的后顶骨和表骨；(3) 较宽的翼外喙。系统发育分析表明，Eryopidae为单系类群，其基础类群为Osteophorus、Glaukerpeton和Onchiodon labyrinthicus。Actinodon可能是一个基干eryopid或一个立体软骨动物，而Onchiodon属不是单系的。Stenokranio n. gen.是一个更为衍生的红腹锦鸡类，是 Eryops 的姊妹类群。Stenokranio 属是萨尔-纳河盆地最大的食肉动物之一。它的半水生生活方式使其能够在河岸和湖岸浏览猎物，但很可能以水生脊椎动物为食。Stenokranio n. gen. 是由水生、半水生和完全陆生脊椎动物组成的动物群的一部分，这些脊椎动物包括石首鱼类和翼手目鱼类、栉齿鲨、一种二维龙类的temnospondyls、不同的 "lepospondyls"、diadectomorphs和synapsids。这与北美二叠纪和二叠纪早期的马内巴赫（Manebach）（图林根森林盆地）和尼德赫斯利希（Niederhäslich）（多伦盆地）的脊椎动物群落基本一致。值得注意的是，在这些地方出现的 Stenokranio n. gen. 和其他红腹石龙类排除了其他大型 temnospondyls（如 Sclerocephalus）的存在。然而，先前描述的雷米吉斯贝格（Remigiusberg）地区分离出的红腹角雉下颚在多个特征上与 Stenokranio n. gen. 的下颚不同，这意味着可能有两个不同的红腹角雉类群生活在同一地点。UUID: www.zoobank.org/88a52547-d6fc-40af-965c-a6786c252ed5
{"title":"A new eryopid temnospondyl from the Carboniferous–Permian boundary of Germany","authors":"R. Werneburg, F. Witzmann, Larry Rinehart, Jan Fischer, Sebastian Voigt","doi":"10.1017/jpa.2023.58","DOIUrl":"https://doi.org/10.1017/jpa.2023.58","url":null,"abstract":"\u0000 A new eryopid temnospondyl, Stenokranio boldi n. gen. n. sp. is described based on well-preserved cranial and postcranial material from fluvio-lacustrine deposits of the Permo-Carboniferous (Gzhelian/Asselian) Remigiusberg Formation at the Remigiusberg quarry near Kusel, Saar–Nahe Basin, southwest Germany. The new taxon is characterized by three autapomorphies within the Eryopidae: (1) the relatively narrow posterior skull table, therefore nearly parallel lateral margins of the skull; (2) the short postparietals and tabulars; and (3) the wide ectopterygoid. Phylogenetic analysis reveals a monophyletic Eryopidae with the basal taxa Osteophorus, Glaukerpeton, and Onchiodon labyrinthicus forming a polytomy. Actinodon may be either a basal eryopid or a stereospondylomorph, and the genus Onchiodon is not monophyletic. Stenokranio n. gen. is found as a more derived eryopid forming the sister taxon to Eryops. Stenokranio n. gen. was among the largest predators of the Saar–Nahe Basin. Its semiaquatic lifestyle enabled Stenokranio n. gen. to browse riverbanks and lake shorelines for prey, but most likely it fed on aquatic vertebrates. Stenokranio n. gen. was part of a faunal assemblage of aquatic, semiaquatic, and fully terrestrial vertebrates, such as sarcopterygian and actinopterygian fishes, xenacanthid sharks, a dvinosaurian temnospondyl, different “lepospondyls”, diadectomorphs, and synapsids. This is in general accordance with the vertebrate community from the Permo-Carboniferous of North America and from the early Permian localities of Manebach (Thuringian Forest Basin) and Niederhäslich (Döhlen Basin). It is notable that the occurrence of Stenokranio n. gen. and other eryopids in these localities excluded the presence of other large temnospondyls such as Sclerocephalus. However, a previously described isolated eryopid mandible from the Remigiusberg locality differs from that of Stenokranio n. gen. in several characters, implying that probably two different eryopid taxa lived at the same locality.\u0000 UUID: www.zoobank.org/88a52547-d6fc-40af-965c-a6786c252ed5","PeriodicalId":50098,"journal":{"name":"Journal of Paleontology","volume":"43 15","pages":""},"PeriodicalIF":1.4,"publicationDate":"2024-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139452057","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}
{"title":"Response by Matt Friedman for the presentation of the 2022 Schuchert Award of the Paleontological Society","authors":"Matt Friedman","doi":"10.1017/jpa.2023.69","DOIUrl":"https://doi.org/10.1017/jpa.2023.69","url":null,"abstract":"","PeriodicalId":50098,"journal":{"name":"Journal of Paleontology","volume":"50 23","pages":""},"PeriodicalIF":1.4,"publicationDate":"2023-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138952510","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}
{"title":"Presentation of the 2022 Paleontological Society Medal to Conrad C. Labandeira","authors":"Peter Wilf","doi":"10.1017/jpa.2023.64","DOIUrl":"https://doi.org/10.1017/jpa.2023.64","url":null,"abstract":"","PeriodicalId":50098,"journal":{"name":"Journal of Paleontology","volume":"9 11","pages":""},"PeriodicalIF":1.4,"publicationDate":"2023-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138948591","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}
{"title":"Presentation of the 2022 Schuchert Award of the Paleontological Society to Matt Friedman","authors":"Zerina Johanson, Michael I. Coates","doi":"10.1017/jpa.2023.68","DOIUrl":"https://doi.org/10.1017/jpa.2023.68","url":null,"abstract":"","PeriodicalId":50098,"journal":{"name":"Journal of Paleontology","volume":"39 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2023-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139001479","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}
W. Ausich, Chuck Ciampaglio, Alexander J. Fabian, Jeremy R. Myers
A diverse echinoderm fauna lived in reef and non-reef Silurian facies of the upper Midwestern USA. However, these faunas are dominantly preserved in dolostones with moldic preservation, and fossils from dolostone facies have not been documented to the extent of Silurian crinoids in nondolostone strata. Herein, an echinoderm fauna is described from the dolostones of the Cedarville Member of the Laurel Limestone (Wenlock, Homerian) from the Pepcon Cement Quarry in west-central Ohio. The described fauna contains blastoids, hemicosmitoids, and crinoids, including Troosticrinus subcylindricus (Hall and Whitfield, 1875); Caryocrinites sp. indet.; an unidentifiable diplobathrid camerate; Periechocrinus tennesseensis (Hall and Whitfield, 1875); Periechocrinus egani? (Miller, 1881); Stiptocrinus farringtoni (Slocom, 1908); Calliocrinus primibrachialis Busch, 1943; Calliocrinus poepplemani new species; Calliocrinus hadros new species; and Lecanocrinus sp. indet. Generic concepts for the Eucalyptocrinitidae are clarified; and, surprisingly, Eucalyptocrinites Goldfuss, 1831 is absent from this fauna. Additionally, lectotypes and paralectotypes are designated for Periechocrinus tennesseensis and Calliocrinus primibrachialis. UUID: http://zoobank.org/a8c8e7e3-9bc3-4078-83bd-5572816366e5
{"title":"A Silurian (Homerian) pelmatozoan echinoderm fauna from west-central Ohio, USA","authors":"W. Ausich, Chuck Ciampaglio, Alexander J. Fabian, Jeremy R. Myers","doi":"10.1017/jpa.2023.74","DOIUrl":"https://doi.org/10.1017/jpa.2023.74","url":null,"abstract":"\u0000 A diverse echinoderm fauna lived in reef and non-reef Silurian facies of the upper Midwestern USA. However, these faunas are dominantly preserved in dolostones with moldic preservation, and fossils from dolostone facies have not been documented to the extent of Silurian crinoids in nondolostone strata. Herein, an echinoderm fauna is described from the dolostones of the Cedarville Member of the Laurel Limestone (Wenlock, Homerian) from the Pepcon Cement Quarry in west-central Ohio. The described fauna contains blastoids, hemicosmitoids, and crinoids, including Troosticrinus subcylindricus (Hall and Whitfield, 1875); Caryocrinites sp. indet.; an unidentifiable diplobathrid camerate; Periechocrinus tennesseensis (Hall and Whitfield, 1875); Periechocrinus egani? (Miller, 1881); Stiptocrinus farringtoni (Slocom, 1908); Calliocrinus primibrachialis Busch, 1943; Calliocrinus poepplemani new species; Calliocrinus hadros new species; and Lecanocrinus sp. indet. Generic concepts for the Eucalyptocrinitidae are clarified; and, surprisingly, Eucalyptocrinites Goldfuss, 1831 is absent from this fauna. Additionally, lectotypes and paralectotypes are designated for Periechocrinus tennesseensis and Calliocrinus primibrachialis.\u0000 UUID: http://zoobank.org/a8c8e7e3-9bc3-4078-83bd-5572816366e5","PeriodicalId":50098,"journal":{"name":"Journal of Paleontology","volume":"81 3","pages":""},"PeriodicalIF":1.4,"publicationDate":"2023-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139005725","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}
Lobopodians are an iconic and diverse group of animals from the Cambrian, which alongside radiodonts, present an important window into the evolution of arthropods and the development of Paleozoic ecosystems. Of these, a rare few species outside of Radiodonta possess lateral swimming flaps. The recent discovery of Utahnax provided much-needed insight into the evolution of swimming flaps, suggesting that the ventrolateral flaps of Kerygmachela evolved independently from other flap-bearing lobopodians and radiodonts. Here a new pelagic lobopodian species is described, Mobulavermis adustus new genus new species, the first lobopodian to be reported from the Cambrian-age Pioche Shale of Nevada. Mobulavermis adustus was large and possessed more ventrolateral flap pairs than any other known lobopodian or radiodont. It is found to be a close relative of both Kerygmachela and Utahnax, allowing the establishment of the new lobopodian family Kerygmachelidae new family. In addition, an indeterminate euarthropod fossil from the Pioche Formation is described in brief, and the recently described Chengjiang species Parvibellus avatus Liu et al., 2022, thought to have been related to the “gilled lobopodians,” is reinterpreted as a juvenile siberiid lobopodian. UUID: http://zoobank.org/759c4eb9-ec60-4d5a-8b20-4f115ab79575
{"title":"A large pelagic lobopodian from the Cambrian Pioche Shale of Nevada","authors":"Christian R.A. McCall","doi":"10.1017/jpa.2023.63","DOIUrl":"https://doi.org/10.1017/jpa.2023.63","url":null,"abstract":"\u0000 Lobopodians are an iconic and diverse group of animals from the Cambrian, which alongside radiodonts, present an important window into the evolution of arthropods and the development of Paleozoic ecosystems. Of these, a rare few species outside of Radiodonta possess lateral swimming flaps. The recent discovery of Utahnax provided much-needed insight into the evolution of swimming flaps, suggesting that the ventrolateral flaps of Kerygmachela evolved independently from other flap-bearing lobopodians and radiodonts. Here a new pelagic lobopodian species is described, Mobulavermis adustus new genus new species, the first lobopodian to be reported from the Cambrian-age Pioche Shale of Nevada. Mobulavermis adustus was large and possessed more ventrolateral flap pairs than any other known lobopodian or radiodont. It is found to be a close relative of both Kerygmachela and Utahnax, allowing the establishment of the new lobopodian family Kerygmachelidae new family. In addition, an indeterminate euarthropod fossil from the Pioche Formation is described in brief, and the recently described Chengjiang species Parvibellus avatus Liu et al., 2022, thought to have been related to the “gilled lobopodians,” is reinterpreted as a juvenile siberiid lobopodian.\u0000 UUID: http://zoobank.org/759c4eb9-ec60-4d5a-8b20-4f115ab79575","PeriodicalId":50098,"journal":{"name":"Journal of Paleontology","volume":"80 13","pages":""},"PeriodicalIF":1.4,"publicationDate":"2023-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139004400","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 decapod crustaceans of Central European Russia have been the subject of studies since the nineteenth century, and the only species, Eryma quadriverrucatum Trautschold, 1866 (Erymidae), has been found in the Callovian to the Oxfordian of that region. The present paper discusses the new exceptional findings of Solenoceridae, Glypheidae, and Mecochiridae from the upper Callovian sites of the Ryazan Region. The previously reported presence of Archeosolenocera sp. is confirmed in detail; Glypheopsis aff. G. etalloni (Oppel, 1861) and Eumorphia sp. are noticed for the first time for this area. Modern identification of erymids is reported: Eryma aff. E. ventrosum (von Meyer, 1835), E. ornatum (Quenstedt, 1858), and Stenodactylina insignis (Oppel, 1862) are noted in addition to E. quadriverrucatum. These findings address the gaps in the fragmented knowledge about the decapod fauna of Central European Russia and exhibit a differentiation of the local Russian decapod assemblage from those of Western Europe. The decapod community of the Ryazan region is considered to be associated with soft substrates of upper sublittoral zone.
{"title":"New findings of Decapoda (Crustacea) in the Callovian of the Ryazan region (Central European Russia)","authors":"Ivan A. Dadykin, A. Shmakov","doi":"10.1017/jpa.2023.73","DOIUrl":"https://doi.org/10.1017/jpa.2023.73","url":null,"abstract":"\u0000 The decapod crustaceans of Central European Russia have been the subject of studies since the nineteenth century, and the only species, Eryma quadriverrucatum Trautschold, 1866 (Erymidae), has been found in the Callovian to the Oxfordian of that region. The present paper discusses the new exceptional findings of Solenoceridae, Glypheidae, and Mecochiridae from the upper Callovian sites of the Ryazan Region. The previously reported presence of Archeosolenocera sp. is confirmed in detail; Glypheopsis aff. G. etalloni (Oppel, 1861) and Eumorphia sp. are noticed for the first time for this area. Modern identification of erymids is reported: Eryma aff. E. ventrosum (von Meyer, 1835), E. ornatum (Quenstedt, 1858), and Stenodactylina insignis (Oppel, 1862) are noted in addition to E. quadriverrucatum. These findings address the gaps in the fragmented knowledge about the decapod fauna of Central European Russia and exhibit a differentiation of the local Russian decapod assemblage from those of Western Europe. The decapod community of the Ryazan region is considered to be associated with soft substrates of upper sublittoral zone.","PeriodicalId":50098,"journal":{"name":"Journal of Paleontology","volume":"35 2","pages":""},"PeriodicalIF":1.4,"publicationDate":"2023-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139006573","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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