Journal of Paleontology最新文献_第8页

†Estelestes ensis (Mammalia, Metatheria) from the early Eocene of Baja California (Mexico) as a generalized polydolopimorphian †Estelestes ensis(哺乳纲，后生动物目)来自始新世早期的下加利福尼亚(墨西哥)，是一种广义的多食动物

IF 1.4 4区地球科学

Journal of Paleontology Pub Date : 2023-01-16 DOI: 10.1017/jpa.2022.105

F. Goin, E. C. Vieytes, V. Crespo, É. Oliveira

{"title":"†Estelestes ensis (Mammalia, Metatheria) from the early Eocene of Baja California (Mexico) as a generalized polydolopimorphian","authors":"F. Goin, E. C. Vieytes, V. Crespo, É. Oliveira","doi":"10.1017/jpa.2022.105","DOIUrl":"https://doi.org/10.1017/jpa.2022.105","url":null,"abstract":"Estelestes ensis Novaceck et al., 1991 is a curious Paleogene metatherian mammal recognized on the basis of a single specimen from Baja California (Mexico) in southern North America. It comes from early Eocene (Wasatchian age) levels of the Las Tetas de Cabra Formation at “Marsupial Hill” in the Lomas Las Tetas de Cabra site (also known as Punta Prieta; see Novaceck et al., 1991). The specimen consists of a fragmentary left mandible with the last premolar, the roots of the first two molars, and almost complete last two molars (Fig. 1). It was referred to the Didelphini (Marsupialia, Didelphimorphia, Didelphidae, Didelphinae) even though Novaceck et al. (1991) stated that the overall morphology of the type specimen poses intriguing problems regarding its relationships. For example, the very deep, robust jaw of Estelestes distinguishes it from any other Holarctic “didelphine” (at the time Novaceck et al., 1991 published their work, both the concept and extent of Didelphidae and Didelphinae were much broader than today). Interestingly, they concluded that Estelestes had close affinities with “Mirandotherium” (lapsus calami for Mirandatherium), from the early Eocene of Itaboraí, in southeastern Brazil. “Resemblance between the two taxa is nevertheless striking, once again raising the possibility of close relationships among certain early members of the Northern Hemisphere and South American Didelphinae” (Novaceck et al., 1991, p. 16). The affinities of Mirandatherium are contested, having been regarded as part of the Didelphimorphia (e.g., de Paula Couto, 1952a) or Microbiotheria (e.g., Marshall, 1987; McKenna and Bell, 1997; Oliveira and Goin, 2011), or even as an alphadontian (Carneiro, 2019).","PeriodicalId":50098,"journal":{"name":"Journal of Paleontology","volume":"97 1","pages":"533 - 538"},"PeriodicalIF":1.4,"publicationDate":"2023-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45182285","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

Miocene instead of Jurassic: the importance of sound fieldwork for paleontological data analysis 中新世而非侏罗纪：良好的实地调查对古生物数据分析的重要性

IF 1.4 4区地球科学

Journal of Paleontology Pub Date : 2023-01-16 DOI: 10.1017/jpa.2022.106

F. Fürsich, Suraj Bhosale, Matthias Alberti, D. Pandey

引用次数: 2

Sympatric speciation driving evolution of Late Ordovician brachiopod Zygospira in eastern North America 同域物种形成驱动北美东部晚奥陶世腕足类合螺类进化

IF 1.4 4区地球科学

Journal of Paleontology Pub Date : 2023-01-16 DOI: 10.1017/jpa.2022.102

Colin D. Sproat, Jessica S.A. McLeod

引用次数: 1

JPA volume 97 issue 1 Cover and Front matter JPA第97卷第1期封面和封面事项

IF 1.4 4区地球科学

Journal of Paleontology Pub Date : 2023-01-01 DOI: 10.1017/jpa.2023.9

引用次数: 0

The rangeomorph fossil Charnia from the Ediacaran Shibantan biota in the Yangtze Gorges area, South China 长江三峡地区埃迪卡拉纪石板滩生物群的轮虫化石

IF 1.4 4区地球科学

Journal of Paleontology Pub Date : 2022-12-06 DOI: 10.1017/jpa.2022.97

Chengxi Wu, K. Pang, Zhe Chen, Xiaopeng Wang, Chuanming Zhou, B. Wan, Xunlai Yuan, S. Xiao

{"title":"The rangeomorph fossil Charnia from the Ediacaran Shibantan biota in the Yangtze Gorges area, South China","authors":"Chengxi Wu, K. Pang, Zhe Chen, Xiaopeng Wang, Chuanming Zhou, B. Wan, Xunlai Yuan, S. Xiao","doi":"10.1017/jpa.2022.97","DOIUrl":"https://doi.org/10.1017/jpa.2022.97","url":null,"abstract":"\u0000 The terminal Ediacaran Shibantan biota (~550–543 Ma) from the Dengying Formation in the Yangtze Gorges area of South China represents one of the rare examples of carbonate-hosted Ediacara-type macrofossil assemblages. In addition to the numerically dominant taxa—the non-biomineralizing tubular fossil Wutubus and discoidal fossils Aspidella and Hiemalora, the Shibantan biota also bears a moderate diversity of frondose fossils, including Pteridinium, Rangea, Arborea, and Charnia. In this paper, we report two species of the rangeomorph genus Charnia, including the type species Charnia masoni Ford, 1958 emend. and Charnia gracilis new species, from the Shibantan biota. Most of the Shibantan Charnia specimens preserve only the petalodium, with a few bearing the holdfast and stem. Despite overall architectural similarities to other Charnia species, the Shibantan specimens of Charnia gracilis n. sp. are distinct in their relatively straight, slender, and more acutely angled first-order branches. They also show evidence that may support a two-stage growth model and a epibenthic sessile lifestyle. Charnia fossils described herein represent one of the youngest occurrences of this genus and extend its paleogeographic and stratigraphic distributions. Our discovery also highlights the notable diversity of the Shibantan biota, which contains examples of a wide range of Ediacaran morphogroups.\u0000 UUID: http://zoobank.org/837216cd-4a4a-4e13-89e2-ee354ba48a4c","PeriodicalId":50098,"journal":{"name":"Journal of Paleontology","volume":" ","pages":""},"PeriodicalIF":1.4,"publicationDate":"2022-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48068470","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

Needmorella, a new trilobite genus of the Synphoriinae (Dalmanitidae) from the Lower–Middle Devonian of West Virginia 西维吉尼亚泥盆纪中下泥盆世三叶虫科三叶虫属Needmorella

IF 1.4 4区地球科学

Journal of Paleontology Pub Date : 2022-12-06 DOI: 10.1017/jpa.2022.96

D. Holloway, Brian M. Scott

{"title":"Needmorella, a new trilobite genus of the Synphoriinae (Dalmanitidae) from the Lower–Middle Devonian of West Virginia","authors":"D. Holloway, Brian M. Scott","doi":"10.1017/jpa.2022.96","DOIUrl":"https://doi.org/10.1017/jpa.2022.96","url":null,"abstract":"Abstract. The trilobite Needmorella new genus, with type species N. simoni new genus new species from the late Emsian to mid-Eifelian Needmore Shale of West Virginia, is a distinctive member of the subfamily Synphoriinae. It also occurs in the same formation in Pennsylvania and Virginia. It is not very similar to other Devonian representatives of the subfamily and is considered to have its origins in a morphologically less-derived ancestor because it shares certain similarities with Silurian genera, including the very short anterior cephalic border unmodified by crenulations or spines, S2 that is not largely reduced to a deep pit adaxially, the relatively low inflation of L3, and the well-defined interpleural furrows on the pygidium. Other particularly distinctive characters of the genus include the very long genal spines and the abaxially inflated and expanded posterior pleural bands on the thorax and pygidium that project slightly distally. The conventional concept of the Devonian synphoriine Anchiopsis Delo, 1935 appears to be incompatible with the holotype of the type species, judging from the early illustrations of the specimen, and the genus could be a synonym of Synphoria Clarke, 1894.","PeriodicalId":50098,"journal":{"name":"Journal of Paleontology","volume":"97 1","pages":"355 - 365"},"PeriodicalIF":1.4,"publicationDate":"2022-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43408553","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

Cornulitid tubeworms and other calcareous tubicolous organisms from the Hirmuse Formation (Katian, Upper Ordovician) of northern Estonia 爱沙尼亚北部赫斯穆斯组(卡提亚，上奥陶统)的角质管虫和其他钙质管状生物

IF 1.4 4区地球科学

Journal of Paleontology Pub Date : 2022-12-05 DOI: 10.1017/jpa.2022.89

O. Vinn, A. Madison, Mark A. Wilson, U. Toom

{"title":"Cornulitid tubeworms and other calcareous tubicolous organisms from the Hirmuse Formation (Katian, Upper Ordovician) of northern Estonia","authors":"O. Vinn, A. Madison, Mark A. Wilson, U. Toom","doi":"10.1017/jpa.2022.89","DOIUrl":"https://doi.org/10.1017/jpa.2022.89","url":null,"abstract":"Abstract. Seven species of cornulitids, one unidentified tubicolous shell, and the problematic bryozoan Lagenosypho Spandel, 1898 are here described from the Katian of Baltica. Three new species—Cornulites lindae new species, Cornulites meidlai new species, and Conchicolites kroegeri new species—are described. The unidentified tubicolous organism has punctate shell structure and setae-like structures that can best be affiliated with lophophorates. The Hirmuse fauna indicates that the diversity and number of cornulitids in the Ordovician of Baltica has been underestimated and it is likely that the Baltic cornulitid fauna was as diverse and abundant as the fauna of Laurentia. Clay mud-bottom environments supported the highest cornulitid diversity in the Late Ordovician of Baltica. The occurrence of intermediate forms indicates that some tentaculitid characters, e.g., regular annulation and a nearly straight shell, which were thought to be apomorphies of free-living tentaculitids, were actually inherited from ancestral cornulitids. The cornulitid fauna of the Late Ordovician of Laurentia somewhat resembles the cornulitid fauna of the Late Ordovician of Baltica, but there are fewer common faunal elements between Gondwana and Baltica.","PeriodicalId":50098,"journal":{"name":"Journal of Paleontology","volume":"97 1","pages":"38 - 46"},"PeriodicalIF":1.4,"publicationDate":"2022-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47379184","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

A new Early Paleogene fossil mammal locality in the central-eastern Nemegt Basin, Gobi Desert, Mongolia, and notes on mammalian biostratigraphy 蒙古戈壁沙漠Nemegt盆地中东部早古近系哺乳动物化石新地点及哺乳动物生物地层学注释

IF 1.4 4区地球科学

Journal of Paleontology Pub Date : 2022-12-05 DOI: 10.1017/jpa.2022.85

K. Yo, Eva A. Hoffman, M. O'Leary, M. Novacek

{"title":"A new Early Paleogene fossil mammal locality in the central-eastern Nemegt Basin, Gobi Desert, Mongolia, and notes on mammalian biostratigraphy","authors":"K. Yo, Eva A. Hoffman, M. O'Leary, M. Novacek","doi":"10.1017/jpa.2022.85","DOIUrl":"https://doi.org/10.1017/jpa.2022.85","url":null,"abstract":"Abstract. We report new, fossiliferous Paleogene Naran Bulak Formation localities from the central-eastern part of the Nemegt Basin of the Gobi Desert, Mongolia. Early Paleogene localities have been identified previously only in the western half of the Nemegt Basin. The new localities, near the town of Daus, are also noteworthy for their geographical proximity to Ukhaa Tolgod, a Late Cretaceous Djadokhta Formation locality known for its numerous dinosaur, mammal, and lizard fossils. The Daus section consists of the Zhigden, Naran, and Bumban members of the Naran Bulak Formation at three localities, and mammal and ostracode fossils were discovered in the Naran Member. Noteworthy discoveries are a dentary of the pantodont Archaeolambda cf. A. planicanina, postcrania of Pantolambdodon, a skull of the gliroid Gomphos, and a partial skull with a worn and damaged dentition provisionally identified as an arctostylopid. Biostratigraphy has been the primary means of dating Paleogene Asian faunas, however, the local fauna from the new localities does not fit easily with established patterns. The Naran Member and Archaeolambda planicanina and the arctostylopid Palaeostylops typically have been allied with the Gashatan Asian Land Mammal Age (ALMA) and attributed to the latest Paleocene. By contrast, Gomphos repeatedly has been found in the Bumban Member and assigned a Bumbanian ALMA, which has been considered as the earliest Eocene. Pantolambdodon has been reported from middle Eocene Arshatan and Irdinmanhan ALMA beds. The co-occurrence of these taxa in Naran Member beds complicates the temporal interpretation of the new localities and the reliability of broader biostratigraphic patterns.","PeriodicalId":50098,"journal":{"name":"Journal of Paleontology","volume":"97 1","pages":"243 - 266"},"PeriodicalIF":1.4,"publicationDate":"2022-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43143447","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

Revision of Eothinoceras and the status of the Eothinoceratidae (Cyrtocerinida, Multiceratoidea, Cephalopoda) 青角鲸的修订和青角鲸科的地位(圆角鲸目，多角总目，头足目)

IF 1.4 4区地球科学

Journal of Paleontology Pub Date : 2022-12-05 DOI: 10.1017/jpa.2022.99

D. H. Evans, Marcela Cichowolski

引用次数: 0

Evidence of large sturgeons in the Paleocene of North America 北美古新世大型鲟鱼的证据

IF 1.4 4区地球科学

Journal of Paleontology Pub Date : 2022-11-17 DOI: 10.1017/jpa.2022.87

C. Brownstein

引用次数: 1