Journal of Paleontology最新文献_第5页

Paleobiological implications of the bone histology of the extinct Australian marsupial Nimbadon lavarackorum 已灭绝的澳大利亚有袋动物Nimbadon lavalrackorum骨组织学的古生物学意义

IF 1.4 4区地球科学

Journal of Paleontology Pub Date : 2023-05-01 DOI: 10.1017/jpa.2023.22

A. Chinsamy, K. Black, S. Hand, M. Archer

{"title":"Paleobiological implications of the bone histology of the extinct Australian marsupial Nimbadon lavarackorum","authors":"A. Chinsamy, K. Black, S. Hand, M. Archer","doi":"10.1017/jpa.2023.22","DOIUrl":"https://doi.org/10.1017/jpa.2023.22","url":null,"abstract":"Abstract. Despite the recognition that bone histology provides much information about the life history and biology of extinct animals, osteohistology of extinct marsupials is sorely lacking. We studied the bone histology of the ca. 15-mil-lion-year-old Nimbadon lavarackorum from Australia to obtain insight into its biology. The histology of thin sections of five femora and five tibiae of juveniles, subadult, and adult Nimbadon lavarackorum was studied. Growth marks in the bones suggest that N. lavarackorum took at least 7–8 years (and likely longer) to reach skeletal maturity. The predominant bone tissue during early ontogeny is parallel-fibered bone, whereas an even slower rate of bone formation is indicated by the presence of lamellar bone tissue in the periosteal parts of the compacta in older individuals. Deposition of bone was interrupted periodically by lines of arrested growth or annuli. This cyclical growth strategy indicates that growth in N. lavarackorum was affected by the prevailing environmental conditions and available resources, as well as seasonal physiological factors such as decreasing body temperatures and metabolic rates.","PeriodicalId":50098,"journal":{"name":"Journal of Paleontology","volume":"97 1","pages":"722 - 734"},"PeriodicalIF":1.4,"publicationDate":"2023-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42514651","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}

引用次数: 0

New records of injured Cambrian and Ordovician trilobites – ERRATUM 寒武系和奥陶系三叶虫损伤新记录-勘误

IF 1.4 4区地球科学

Journal of Paleontology Pub Date : 2023-05-01 DOI: 10.1017/jpa.2023.37

R. Bicknell, Patrick M. Smith, T. Howells, J. R. Foster

{"title":"New records of injured Cambrian and Ordovician trilobites – ERRATUM","authors":"R. Bicknell, Patrick M. Smith, T. Howells, J. R. Foster","doi":"10.1017/jpa.2023.37","DOIUrl":"https://doi.org/10.1017/jpa.2023.37","url":null,"abstract":". — Records of abnormal fossil arthropods present important insight into how extinct forms responded to traumatic damage and developmental complications. Trilobites, bearing biomineralized dorsal exoskeletons, have arguably the most well-documented record of abnormalities spanning the Cambrian through the end-Permian. As such, new records of malformed, often injured, trilobites are occasionally identi ﬁ ed. To further expand the documentation of abnormal specimens, we describe malformed specimens of Lyriaspis sigillum Whitehouse, 1939, Zacanthoides sp. indet., Asaphiscus wheeleri Meek, 1873, Elrathia kingii (Meek, 1870), and Ogygiocarella debuchii (Brongniart, 1822) from lower Paleozoic deposits. In considering these forms, we propose that they illustrate examples of injuries, and that the majority of these injuries re ﬂ ect failed predation. We also considered the origin of injuries impacting singular segments, suggesting that these could re ﬂ ect predation, self-induced damage, or intraspeci ﬁ c interactions during soft-shelled stages. Continued examination of lower Paleozoic trilobite injuries will further the understanding of how trilobites functioned as prey and elucidate how disparate trilobite groups recovered from failed attacks.","PeriodicalId":50098,"journal":{"name":"Journal of Paleontology","volume":"97 1","pages":"774 - 775"},"PeriodicalIF":1.4,"publicationDate":"2023-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48566339","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}

引用次数: 0

The unusual atrypide brachiopod Qilianotryma suspectum (Popov, 1982) from the Upper Ordovician of the South China paleoplate 华南古板块上奥陶统罕见的非典型腕足动物Qilianotryma suectum (Popov, 1982)

IF 1.4 4区地球科学

Journal of Paleontology Pub Date : 2023-05-01 DOI: 10.1017/jpa.2023.26

Yuchen Zhang, Colin D. Sproat, Renbin Zhan

{"title":"The unusual atrypide brachiopod Qilianotryma suspectum (Popov, 1982) from the Upper Ordovician of the South China paleoplate","authors":"Yuchen Zhang, Colin D. Sproat, Renbin Zhan","doi":"10.1017/jpa.2023.26","DOIUrl":"https://doi.org/10.1017/jpa.2023.26","url":null,"abstract":"Abstract. The atrypide brachiopod Qilianotryma Xu in Jin et al., 1979 is an early member of the subfamily Spirigerininae initially described from the Katian (Upper Ordovician) Koumenzi Formation of the Qilian Mountains, Qaidam terrane, Northwest China. Qilianotryma suspectum (Popov in Nikiforova et al., 1982) is described for the first time from the Upper Ordovician of South China paleoplate. Serial sectioning in this study revealed the typical spiralia and other internal structures of early atrypides. The rephotographing of type material and discriminant analysis support that Qilianotryma and broadly similar Euroatrypa can be differentiated in terms of external morphology. The distribution of Qilianotryma across the South China paleoplate, Qaidam terrane, and a few Kazakh terranes (i.e., Chu-Ili, Boshchekul, and Chingiz-Tarbagatai) supports a low-latitude faunal province separate from that of Laurentia and Baltica during the Katian, but further work describing and reviewing additional fossil material from these plates and terranes may improve our understanding of the position of these plates and the role that paleogeography played in increasing biodiversity during the Ordovician Radiation.","PeriodicalId":50098,"journal":{"name":"Journal of Paleontology","volume":"97 1","pages":"539 - 548"},"PeriodicalIF":1.4,"publicationDate":"2023-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46029518","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}

引用次数: 0

Pliocene fossils support a New Zealand origin for the smallest extant penguins 上新世化石支持现存最小企鹅的新西兰起源

IF 1.4 4区地球科学

Journal of Paleontology Pub Date : 2023-05-01 DOI: 10.1017/jpa.2023.30

Daniel B. Thomas, A. Tennyson, F. G. Marx, D. Ksepka

引用次数: 1

Two Asian cricetodontine-like muroid rodents from the Neogene of western North America – CORRIGENDUM 来自北美西部新近纪的两种亚洲类啮齿动物-勘误

4区地球科学

Journal of Paleontology Pub Date : 2023-05-01 DOI: 10.1017/jpa.2023.28

Robert A. Martin, Thomas S. Kelly, Patricia Holroyd

引用次数: 0

Conulariid soft parts replicated in silica from the Scotch Grove Formation (lower Middle Silurian) of east-central Iowa 爱荷华州中东部Scotch Grove组（志留系下中期）二氧化硅中复制的球藻状软质部分

IF 1.4 4区地球科学

Journal of Paleontology Pub Date : 2023-04-27 DOI: 10.1017/jpa.2023.6

Heyo Van Iten, N. Hughes, Douglas L. John, R. Gaines, M. Colbert

{"title":"Conulariid soft parts replicated in silica from the Scotch Grove Formation (lower Middle Silurian) of east-central Iowa","authors":"Heyo Van Iten, N. Hughes, Douglas L. John, R. Gaines, M. Colbert","doi":"10.1017/jpa.2023.6","DOIUrl":"https://doi.org/10.1017/jpa.2023.6","url":null,"abstract":"\u0000 Two specimens of Metaconularia manni (Roy, 1935) from the lower Middle Silurian Scotch Grove Formation (eastern Iowa) exhibit well-defined, relict soft parts replicated in silica. One of these specimens bears phosphatic periderm, whereas the other specimen is a mold. Present within the erect, undistorted apical region of the specimen preserving periderm, on opposite sides of the peridermal cavity, are two small, elongate masses of silica located near the midlines of two of the four faces. Present in the central portion of the other specimen, at a somewhat greater distance from the apex, are five pairs of hollow, elongate, keeled pouch-like bodies (hereafter pouches), the long axes of which converge on the center of the fossil. Each pair of pouches is associated with a short, narrow, gently curved or broadly U-shaped tube, also composed of silica. Additionally, two of the pouch/tube combinations are associated with a pair of rectilinear furrows that correspond to the paired internal carinae that straddled the conulariid's facial midlines. We interpret the paired pouches and short tubes in the moldic specimen as relic conulariid soft parts homologous, respectively, to the interradial gonads and retractor muscles of extant, stauromedusan and polypoid scyphozoan cnidarians. Unlike most conulariids, which exhibit four faces, this individual had five faces, an aberrant morphology known in one other conulariid. The two small masses in the other specimen are more difficult to interpret, but they, too, could be relic gonads or longitudinal muscles. These interpretations suggest that, as in certain extant scyphozoans, at least one conulariid lost the free-living, sexual medusoid life phase.","PeriodicalId":50098,"journal":{"name":"Journal of Paleontology","volume":" ","pages":""},"PeriodicalIF":1.4,"publicationDate":"2023-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45478855","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}

引用次数: 1

Two Asian cricetodontine-like muroid rodents from the Neogene of western North America 北美洲西部新第三纪的两种亚洲类环齿龙类鼠

IF 1.4 4区地球科学

Journal of Paleontology Pub Date : 2023-04-13 DOI: 10.1017/jpa.2023.10

R. A. Martin, Thomas S. Kelly, P. Holroyd

{"title":"Two Asian cricetodontine-like muroid rodents from the Neogene of western North America","authors":"R. A. Martin, Thomas S. Kelly, P. Holroyd","doi":"10.1017/jpa.2023.10","DOIUrl":"https://doi.org/10.1017/jpa.2023.10","url":null,"abstract":"Abstract. We appraise the morphology and potential origin of two Neogene cricetodontine-like muroids, Pliotomodon primitivus from Late Miocene sediments in northern California and an undescribed muroid from the late Oligocene or Early Miocene of central Oregon. Superficial resemblance of the dentition of Pliotomodon with members of the North American galushamyinan neotominins is considered a result of parallel evolution, as shown by the large size and unreduced M3/m3 of the former. Dental features of Pliotomodon are similar to those of Eurasian genera such as Byzantinia, Hispanomys, and Ruscinomys, but the unusual morphology of M3/m3, with continuous enamel connections across their lingual surfaces closing the hypoflexus and posteroflexid, respectively, plus retention of only three roots on M1, suggests Pliotomodon arose from an ancestor distinct from the one that gave rise to the large late Neogene hypsodont cricetodontines of the Old World. In the absence of known ancestral taxa in North America, we postulate Pliotomodon dispersed to North America across Beringia during the Hemphillian (ca. 8.6 Ma, Hh-1). Another archaic cricetodontine-like rodent, from the Warm Springs region of the John Day Formation in Oregon, is named as a new species of Deperetomys, D. dingusi new species. Deperetomys dingusi n. sp. likely descended from a species of Deperetomys intermediate between archaic species such as D. calefactus and D. magnus and more dentally derived species such as D. intermedius and D. hagni, dispersing to North America during the late Oligocene or Early Miocene (Arikareean; ca. 23 Ma, Ar3 or Ar4).","PeriodicalId":50098,"journal":{"name":"Journal of Paleontology","volume":"97 1","pages":"735 - 753"},"PeriodicalIF":1.4,"publicationDate":"2023-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42304936","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}

引用次数: 0

What's behind a name: The taxonomic status of Helicancylus Gabb, 1869 and Hamiticeras Anderson, 1938 (Ammonoidea, Lower Cretaceous) 名称背后的内容：Helicancylus Gabb的分类地位，1869年和Hamiticeras Anderson，1938年（菊科，下白垩纪）

IF 1.4 4区地球科学

Journal of Paleontology Pub Date : 2023-04-12 DOI: 10.1017/jpa.2023.15

C. Frau, L. Bulot

引用次数: 0

Ancient Basidiomycota in an extinct conifer-like tree, Xenoxylon utahense, and a brief survey of fungi in the Upper Jurassic Morrison Formation, USA 美国上侏罗统莫里森组已灭绝针叶树中古担子菌群的研究

IF 1.4 4区地球科学

Journal of Paleontology Pub Date : 2023-04-11 DOI: 10.1017/jpa.2023.12

Aowei Xie, C. T. Gee, N. Tian

{"title":"Ancient Basidiomycota in an extinct conifer-like tree, Xenoxylon utahense, and a brief survey of fungi in the Upper Jurassic Morrison Formation, USA","authors":"Aowei Xie, C. T. Gee, N. Tian","doi":"10.1017/jpa.2023.12","DOIUrl":"https://doi.org/10.1017/jpa.2023.12","url":null,"abstract":"Abstract. Although the well-known Upper Jurassic Morrison Formation has yielded abundant fossil plants for nearly a century, relatively little is known about fossil fungi and their ecological relationships to the Morrison flora. The first mention of fungal decay in fossil wood was briefly made over three decades ago, and since then, a few more reports of fungal decay associated with Morrison plants have been published. However, up to now, detailed data on the fossil fungi themselves have not been given from the Morrison Formation. Here we describe in detail well-preserved fossil mycelia in a silicified log of Xenoxylon utahense Xie et Gee, 2021 from the Upper Jurassic Morrison Formation at Miners Draw, Blue Mountain, near Vernal in northeastern Utah, USA. The fungal hyphae are variable in form, ranging from straight to slightly curved to highly coiled to tubular; they measure ∼1.53 µm in diameter and possess clamp connections, septa, and occasional bifurcations. The occurrence of clamp connections typical of living Basidiomycota indicates a taxonomic affinity to this division of fungi. On the basis of the patterns of wood decay in the Xenoxylon log, the fossil fungi are interpreted here as pertaining to saprotrophic, white-rot wood fungi. These fossil mycelia represent a new record of ancient Basidiomycota from the Upper Jurassic Morrison Formation and provide further evidence for plant–fungus interactions in Jurassic terrestrial ecosystems.","PeriodicalId":50098,"journal":{"name":"Journal of Paleontology","volume":"97 1","pages":"754 - 763"},"PeriodicalIF":1.4,"publicationDate":"2023-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42529928","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}

引用次数: 0

New paddlefishes (Acipenseriformes, Polyodontidae) from the Late Cretaceous Tanis Site of the Hell Creek Formation in North Dakota, USA 美国北达科他州Hell Creek组晚白垩世Tanis遗址的新白鲟（鲟形目，多齿目）

IF 1.4 4区地球科学

Journal of Paleontology Pub Date : 2023-04-11 DOI: 10.1017/jpa.2023.19

E. Hilton, Melanie A. D. During, L. Grande, P. Ahlberg

{"title":"New paddlefishes (Acipenseriformes, Polyodontidae) from the Late Cretaceous Tanis Site of the Hell Creek Formation in North Dakota, USA","authors":"E. Hilton, Melanie A. D. During, L. Grande, P. Ahlberg","doi":"10.1017/jpa.2023.19","DOIUrl":"https://doi.org/10.1017/jpa.2023.19","url":null,"abstract":"Abstract. The recently discovered mass mortality of fishes from the Tanis Site in the North Dakota portion of the Late Cretaceous Hell Creek Formation contains many well-preserved, three-dimensional skeletons. Among these are representatives of two acipenseriform families, Acipenseridae (sturgeons) and Polyodontidae (paddlefishes). This paper describes two new monotypic polyodontid genera, expanding our knowledge of polyodontid diversity. The first of the new species described here is †Parapsephurus willybemisi n. gen. n. sp. It is distinguished from all other known species by having a combination of posteriorly elongate parietals, the middle fenestra longitudinalis bordered medially by the parietal and frontal and laterally by the dermopterotic, slender and numerous dorsal caudal fulcra, an elongate hyomandibula that is not hourglass shaped, and gill rakers that are short and widely spaced. The second polyodontid species described here is †Pugiopsephurus inundatus n. gen. n. sp. It is diagnosed by a combination of having stellate bones that are exceptionally poorly developed or absent and having a dermopalatine with a medial expansion and lacking an ectopterygoid process. The two species of paddlefishes described in this paper add to the morphological and taxonomic diversity of Polyodontidae. The presence of these taxa within the Hell Creek Formation hints at substantial diversity of polyodontids at this stage of their evolutionary history.","PeriodicalId":50098,"journal":{"name":"Journal of Paleontology","volume":"97 1","pages":"675 - 692"},"PeriodicalIF":1.4,"publicationDate":"2023-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42129101","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}

引用次数: 1