PaleoBios Pub Date : 2024-05-08 DOI: 10.5070/p941161500

J. N. Cerasoni, Michael A. Bell, Y. Stuart

引用次数: 0

A new fossil Euspira? (Mollusca: Gastropoda: Naticidae) from the Gubik Formation on the North Slope of Arctic Alaska 一种新化石阿拉斯加州北坡古比克组的软体动物(软体动物:腹足目:软体动物科)

PaleoBios Pub Date : 2023-11-05 DOI: 10.5070/p9401557134

Charles L. Powell, II, Ashley A. Dineen

引用次数: 0

A late Eocene wood assemblage from the Crooked River Basin, Oregon, USA 美国俄勒冈州克鲁克河流域晚始新世木材组合

PaleoBios Pub Date : 2023-11-01 DOI: 10.5070/p9401462457

Elisabeth A. Wheeler, Steven R. Manchester, Pieter Baas

{"title":"A late Eocene wood assemblage from the Crooked River Basin, Oregon, USA","authors":"Elisabeth A. Wheeler, Steven R. Manchester, Pieter Baas","doi":"10.5070/p9401462457","DOIUrl":"https://doi.org/10.5070/p9401462457","url":null,"abstract":"Well-preserved silicified woods are common in the Pacific Northwest, USA. Localities near the town of Post, Oregon, provide insights into the late Eocene vegetation and climate ca. 36 million years ago and data for comparing both older and younger wood floras of the region. New investigations of the late Eocene Dietz Hill locality (UF 278) revealed woods belonging to the families Pinaceae (Keteleeria farjonii sp. nov.), Cupressaceae (Taxodioxylon sp.), Magnoliaceae (Magnolia hansnooteboomii sp. nov.), Lauraceae (Laurinoxylon sp. A and B), Platanaceae (Platanoxylon haydenii (Felix) Süss and Müller-Stoll, 1977), Fabaceae (cf. Styphonolobium sp.), Fagaceae (Fagus dodgei Wheeler and Manchester, 2021, Quercus sp., Red Oak type), Juglandaceae (Carya leroyii sp. nov.), Ulmaceae (Ulmus woodii Wheeler and Manchester, 2007), Sapindaceae (Aesculus constabularisii sp. nov., Klaassenoxylon wilkinsonii gen. et sp. nov.), and Araliaceae (Plerandreoxylon oskolskii sp. nov.). Some woods could be assigned to order, but not to family, Rosales (Urticaleoxylon stevensii gen. et sp. nov., and two unnamed woods with features of  Cannabaceae and Moraceae), Sapindales (cf. Fagaroxylon sp.). There also is a Hamamelidoxylon sp., which has features found in both the Theaceae and Hamamelidaceae. These woods, together with taxa identified from co-occurring silicified fruits and seeds represent a diverse assemblage of warm temperate to subtropical woody plants, some with East Asian affinities. Comparing the wood functional traits of the Dietz Hill assemblage to the older Clarno Nut Beds (mid-Eocene) woods and to the younger woods associated with Oligocene Bridge Creek flora attests to increased seasonality and cooling climate.","PeriodicalId":477091,"journal":{"name":"PaleoBios","volume":"22 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135221171","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Two new plioplatecarpine mosasaurs (Mosasauridae; Plioplatecarpinae) of the genus Ectenosaurus from the Upper Cretaceous of North America 沧龙科沧龙属二新种;颈龙属来自北美上白垩纪

PaleoBios Pub Date : 2023-10-23 DOI: 10.5070/p9401362375

Caitlin R. Kiernan, Jun A. Ebersole

{"title":"Two new plioplatecarpine mosasaurs (Mosasauridae; Plioplatecarpinae) of the genus Ectenosaurus from the Upper Cretaceous of North America","authors":"Caitlin R. Kiernan, Jun A. Ebersole","doi":"10.5070/p9401362375","DOIUrl":"https://doi.org/10.5070/p9401362375","url":null,"abstract":"Two new species of the rare mosasaur Ectenosaurus are reported from the Upper Cretaceous of North America. Ectenosaurus tlemonectes sp. nov. (YPM VP4673) consists of a largely complete skull and some associated post-cranial elements that were derived from an unknown level within the Smoky Hill Member of the Niobrara Chalk (upper Coniacian-lower Campanian), of Kansas, USA. Ectenosaurus shannoni sp. nov. (ALMNH:Paleo:5452) is described from a much more fragmentary specimen collected from the unnamed member of the Mooreville Chalk (upper Santonian-lower Campanian) of Alabama, USA. These new taxa can be distinguished from the other members of the genus, E. clidastoides (Merriam, 1894) and E. everhartorum Willman et al. (2021), by clear morphological differences in the skull and jaws. Two parsimony analyses of a data matrix consisting of 98 characters and 20 terminal taxa were carried out, the first without constraints and the second constrained by the assumption of monophyly in Ectenosaurus. Both analyses resulted in 30 equally parsimonious trees of 255 steps. Neither analysis yielded definitive information about the position of Ectenosaurus within Plioplatecarpinae, suggesting the need for an expanded data matrix. Although Ectenosaurus is an extremely rare component of the mosasaur assemblages from which it is found, it is also a diverse genus, with now at least four recognized species. This raises questions about the paleoecology and paleobiogeography of this genus and requires additional investigation.","PeriodicalId":477091,"journal":{"name":"PaleoBios","volume":"57 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135365931","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Nucella demouthae, A New Late Miocene Muricid Gastropod From Northern California, U.S.A. 美国北加州晚中新世一种新的杀人腹足动物

PaleoBios Pub Date : 2023-10-13 DOI: 10.5070/p9411257951

Charles L. Powell, II, Barry Roth, Christine N. Garcia

引用次数: 0

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