RefDoc
Haut

Faire une nouvelle recherche
Make a new search
Lancer la recherche


Titre du document / Document title

New Late Cretaceous epitoniid and zygopleurid gastropods from the Pacific slope of North America

Auteur(s) / Author(s)

SQUIRES Richard L. ; SAUL Louella R. ;

Résumé / Abstract

Seventeen species of epitoniid gastropods are discussed from Upper Cretaceous shallow-marine rocks in British Columbia, California, and northern Baja California. Eleven of the species are new: Opalia atra, Opalia cavea, Amaea trifolia, Amaea cerva, Amaea pentzia, Belliscala petra, Belliscala meta, Acirsa alpha, Acirsa beta, Acirsa delta, and Acirsa epsilon. The genera Amaea, Belliscala, and Acirsa have not been previously reported from Cretaceous rocks in this region. Generic assignment, age, and distribution of Opalia? mathewsonii (Gabb, 1864), Belliscala suciense (Whiteaves, 1879), Acirsa obtusa (White, 1889), Acirsa nexilia (White, 1889), and Confusiscala newcombii (Whiteaves, 1903) are discussed. Claviscala sp. is recognized, and it represents the first confirmed Late Cretaceous occurrence of this genus in this region. The very rare and large Zebalia n. gen. suciensis (Packard, 1922), from Upper Cretaceous rocks in Washington and southern California, is an epitoniid-like zygopleurid gastropod and the first Late Cretaceous record of zygopleurids.

Revue / Journal Title

The Veliger    ISSN  0042-3211   CODEN VLGHAL 

Source / Source

2003, vol. 46, no1, pp. 20-49 [30 page(s) (article)]

Langue / Language

Anglais

Editeur / Publisher

California Malacozoological Society, Santa Barbara, CA, ETATS-UNIS  (1958) (Revue)

Localisation / Location

INIST-CNRS, Cote INIST : 13997, 35400010379460.0020

Nº notice refdoc (ud4) : 14485113



Faire une nouvelle recherche
Make a new search
Lancer la recherche
Bas