Record details

Title
    On the occurrence of Spinidelphinulopsis whaleni (Gastropoda) in the Late Triassic (early Norian) Cornwallis Limestone, Kuiu Island, southeastern Alaska (Alexander terrane) and its paleobiogeographic significance
Statement of responsibility
    Robert B. Blodgett, Jiří Frýda
Author
    Blodgett, Robert B.
    Frýda, Jiří
Language
    anglicky
Source title - serial
    Věstník Českého geologického ústavu (Bulletin of the Czech Geological Survey)
Vol./nr.
    Vol. 76, no. 4
Pages
    p. 235-242
Year
    2001
Notes
    3 obr., 1 fot., 2 s.bibl.
    il.
    Zkr. název ser.: Věst. Čes. geol. Úst. (Bull. Czech geol. Surv.)
Subject group
    Delphinulopsidae
    ekologie
    Gastropoda
    larva
    Neritimorpha
    nor
    paleobiogeografie
    taxonomie
    terán
    trias-svrchní
    vápenec
Geographical name
    Kuiu Island (USA-Alaska)
    USA-Alaska
Keyword
    Alaska
    Alexander
    Cornwallis
    Early
    Gastropoda
    Island
    Kuiu
    Late
    Limestone
    Norian
    Occurrence
    Paleobiogeographic
    Significance
    Southeastern
    Spinidelphinulopsis
    Terrane
    Triassic
    Whaleni
Abstract (in english)
   The gastropod Spinidelphinulopsis whaleni Blodgett, Frýda and Stanley, 2001, was originally described from late Carnian or early Norian strata on the oregon side of Hells Canyon in the Walowa terrane of the Pacific Northwest (Oregon, Idaho, and Washington). It is probably also present in early Norian strata at Grenn Butte, Wrangell Mountains (Wrangellia terrane) of southern Alaska. The common presence of this species and many other shared gastropod species has previously been cited as being evidence for close biogeographic linkage between the Wrangellia and and Wallowa terranes. Quite dissimilar, coeval gastropod faunas are found in the in-board Alexander terrane of southern Alaska. new collections from early Norian strata on Kuiu Island, southeastern Alaska (Alexander terrane) show that S. whaleni is also present in this terrane as well, in association with an essentially totally different gastropod fauna dominated by pleurotomaroids, trochoideans, and purpurinids.
   Explanation for the now known widespread distribution of this neritimorph species in a number of different terranes in eastern Panthalassa during Late Triassic times seems to be best attributed to it having a relatively long-lived planktonic larval stage, allowing it to be relatively easily dispersed
Contributor
    Česká geologická služba
Contributor code
    ČGS (UNM)
Source format
    U
Entered date
    4. 7. 2007
Import date
    8. 8. 2012