Journal of Paleontology

Journal Information
ISSN / EISSN : 0022-3360 / 1937-2337
Current Publisher: Cambridge University Press (CUP) (10.1017)
Former Publisher: Paleontological Society (10.1666)
Total articles ≅ 5,093
Current Coverage
SCOPUS
SCIE
GEOBASE
LOCKSS
Archived in
SHERPA/ROMEO
EBSCO
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Latest articles in this journal

James R. Thomka, Carlton E. Brett, Donald L. Bissett
Journal of Paleontology pp 1-7; doi:10.1017/jpa.2020.91

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Lijing Liu, Yasheng Wu, Hongping Bao, Hongxia Jiang, Lijing Zheng, Yanlong Chen
Journal of Paleontology pp 1-23; doi:10.1017/jpa.2020.82

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Jan Ove R. Ebbestad, Dennis R. Kolata, Mare Isakar
Journal of Paleontology pp 1-17; doi:10.1017/jpa.2020.81

Abstract:
A new sinistrally coiled univalved mollusk Catalanispira n. gen. is described with two species; Catalanispira reinwaldti (Öpik, 1930) from the Middle Ordovician Kõgekallas Formation (Darriwilian) of Estonia and Catalanispira plattevillensis n. gen. n. sp. from the Upper Ordovician Platteville Formation (Sandbian) of northern Illinois, USA. Morphological features include a large, low-trochiform shell, a narrow lenticular aperture, a deep funnel-like umbilicus, a falcate inner lip and a large (1.4 mm wide) protoconch. Ornamentation consists of fine commarginal growth lines or ribs but superimposed on a slightly irregular shell surface. Catalanispira n. gen. is placed within the sinistrally coiled order Mimospirida and the family Onychochilidae, and Catalanispirinae n. subfam. is proposed. The large Lower Ordovician (Tremadocian) Pelecyogyra Ebbestad and Lefebvre, 2015 from Morocco and France is transferred to this new subfamily. The well-preserved initial growth stage of Catalanispira plattevillensis n. gen. n. sp. is cap-shaped, slightly asymmetrical, unusually large, and smooth, and represents either an unusually large embryonic shell (protoconch 1) or a larval shell (protoconch 2). It differs from the smaller protoconch described for the clisospirine Mimospira Koken in Koken and Perner, 1925, which might include a multiwhorled larval shell (protoconch 2). Mimospirids are dominantly Ordovician, and have been classified as untorted mollusks (only distantly related to gastropods), dextral hyperstrophic gastropods, or sinistral orthostrophic gastropods. Sinistral asymmetry already in the embryonic shell and lack of conclusive evidence for coiling direction, e.g., an operculum, could suggest that Catalanispira n. gen. or similar mimosprids were sinistral orthostrophic gastropods. Currently the group is therefore classified as a group of sinistral orthostrophic gastropods, unranked within the Gastropoda. UUID: http://zoobank.org/affc8dcf-4c0f-493d-bee5-75a457996e84
Michael Hautmann, Evelyn Friesenbichler, Eugen Grădinaru, Romain Jattiot, Hugo Bucher
Journal of Paleontology pp 1-7; doi:10.1017/jpa.2020.79

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Eric J. Hilton, Lance Grande, Fan Jin
Journal of Paleontology pp 1-14; doi:10.1017/jpa.2020.80

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Chase Doran Brownstein, Immanuel Bissell
Journal of Paleontology pp 1-9; doi:10.1017/jpa.2020.83

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Journal of Paleontology, Volume 94; doi:10.1017/jpa.2020.90

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Journal of Paleontology, Volume 94; doi:10.1017/jpa.2020.89

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Anna V. Koromyslova, Petr V. Fedorov
Journal of Paleontology pp 1-16; doi:10.1017/jpa.2020.73

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Luis Collantes, Eduardo Mayoral, Eladio Liñán, Rodolfo Gozalo
Journal of Paleontology pp 1-10; doi:10.1017/jpa.2020.71

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