Record details

Title
    Delphinulopsidae, a new neritopsoidean gastropod family from the Upper Triassic (upper Carnian or lower Norian) of the Wallowa terrane, northeastern Oregon
Statement of responsibility
    Robert B. Blodgett, Jiří Frýda, George D.Stanley jr.
Other titles
    Delphinulopsidae, nová čeleď neritopsoidních gastropodů ze svrchního triasu (svrchní karn nebo spodní nor) teránu Wallowa, severovýchodní Oregon
Author
    Blodgett, Robert B.
    Frýda, Jiří
    Stanley, George D., jr.
Language
    anglicky
Source title - serial
    Journal of the Czech Geological Society
Vol./nr.
    Vol. 46, no. 3-4
Pages
    p. 307-318
Year
    2001
Notes
    3 obr., 3 fot., 3 s.bibl.
    České resumé
    il.
    Zkr. název ser.: J. Czech geol. Soc.
Subject group
    Gastropoda
    Neritimorpha
    nový taxon
    paleobiogeografie
    paleogeografie
    schránky
    taxonomie
    terán
    trias-svrchní
Geographical name
    USA-Oregon
Keyword
    Carnian
    Delphinulopsidae
    Family
    Gastropod
    Lower
    Neritopsoidean
    New
    Norian
    Northeastern
    Oregon
    Terrane
    Triassic
    Upper
    Wallowa
Abstract (in english)
   Three new neritopsoidean gastropods, Paradelphinulopsis vallieri gen. et sp.nov., Spinidelphinulopsis whaleni gen. et sp.nov., and Wallowanerita newtonae gen. et sp.nov., are described from the Martin Bridge Formation of northeastern Oregon. These species come from late Carnian or early Norian age strata of the Spring Creek locality in Hells Canyon. The new genera are placed in the new family Delphinulopsidae, belonging to the superfamily Neritopsoidea. This new family also includes the genera Dephinulopsis and Seisia. The Delphinulopsidae represents a dinstinctive Middle to Late Triassic group of neritopsoideans characterized by a rapidly expanding shell and a strongly developed plate-like septum extending into the aperture from the inner lip. The group is characteristic for warm tropical seaways of the Middle to Late Triassic, including the classical Tethyan regions of Europe, as well as southern China, Oregon, and southern Alaska.
   Close paleobiogeographic affinities are notes between the Late Triassic gastropod fauna of the Wallowa and Wrangellia terranes, including the sharing of two of the new species described here. On the basis of their closely similar faunas (60% of the Wrangellian species from Green Butte are also found in the coeval Spring Creek fauna), we believe that these two terranes were in close reproductive communication in the tropics of the Panthalassa Ocean
Contributor
    Česká geologická služba
Contributor code
    ČGS (UNM)
Source format
    U
Entered date
    31. 3. 2008
Import date
    8. 8. 2012