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New Cretaceous and Paleogene Decapoda (Astacidae, Thalassinidea, Brachyura) from British Columbia, Canada (CROSBI ID 148101)

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Schweitzer, Carrie ; Feldmann, Rodney ; Ćosović, Vlasta ; Ross, Richard ; Waugh, David New Cretaceous and Paleogene Decapoda (Astacidae, Thalassinidea, Brachyura) from British Columbia, Canada // Annals of carnegie museum, 77 (2009), 4; 403-423

Podaci o odgovornosti

Schweitzer, Carrie ; Feldmann, Rodney ; Ćosović, Vlasta ; Ross, Richard ; Waugh, David

engleski

New Cretaceous and Paleogene Decapoda (Astacidae, Thalassinidea, Brachyura) from British Columbia, Canada

A collection of Cretaceous and Eocene specimens of decapod crustaceans from southern Vancouver Island, British Columbia, Canada, has yielded three new genera, Cowichianassa, Comoxianassa, and Preclarocarcinus, and four new species, Cowichianassa meckerti, Comoxianassa haggarti, Preclarocarcinus parvus, and Nitotacarcinus canadensis. The former two new species, each of which are callianassid ghost shrimp, display sexual dimorphism and are well-documented from major and minor claws as well as abdomina, unusual in the fossil record and especially unusual for Cretaceous forms. Nitotacarcinus was previously only known from the Eocene of Denmark ; thus, the new species extends its paleobiogeographic range dramatically. The beds in which the decapods were collected from the Paleogene Via Appia Beds were deposited in generally high-energy conditions favoring the formation of glauconite.

Astacidae; Brachyura; Canada; Cretaceous; Decapoda; Eocene; sexual dimorphism; Thalassinidea

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Podaci o izdanju

77 (4)

2009.

403-423

objavljeno

0097-4463

Povezanost rada

Geologija

Indeksiranost