Podrobnosti záznamu

Název
    New Emsian (late Early Devonian) gastropods from Limestone Mountain, Medfra B-4 quadrangle, west-central Alaska (Farewell Terrane), and their paleobiogeographic affinities and evolutionary significance
Údaj o odpovědnosti
    Jiří Frýda, Robert B. Blodgett
Autor
    Blodgett, Robert B.
    Frýda, Jiří, 1961-
Jazyk
    anglicky
Zdrojový dokument - seriál
    Journal of paleontology
Svazek/č.
    Vol. 78, no. 1
Strany
    p. 111-132
Rok
    2004
Poznámky
    4 obr., 8 pl.
    Bibliografie na s. 129-132
    il.
    Zkr. název ser.: J. Paleont.
Klasifikační znak
    562/569
Předmětová skupina
    Archaeogastropoda
    devon
    ems
    Gastropoda
    nový taxon
    paleobiogeografie
    paleontologická rekonstrukce
    paleontologie
    popis taxonů
    schránky
    terán
Geografické jméno
    USA-Alaska
Klíčové slovo
    Affinities
    Alaska
    B-4
    Devonian
    Early
    Emsian
    Evolutionary
    Farewell
    Gastropods
    Late
    Limestone
    Medfra
    Mountain
    New
    Paleobiogeographic
    Quadrangle
    Significance
    Terrane
    West-central
Abstrakt (anglicky)
   A significant number of small-sized gastropods are described from Emsian (late Early Devonian) strata on the south flank of Limestone Mountain, Medfra B-4 quadrangle, west-central Alaska, providing the first detailed taxonomie inventory of Emsian gastropods from the Farewell terrane of southwestern and west-central Alaska. The fauna is distinctly of Old World Realm character, and contains not a single species in common with Emsian faunas of nearby nonaccreted rocks of western Canada and east-central Alaska ("Western Canada Province" of Blodgett et al., 2001a). The genera Balbinipleura Bandel and Frýda, 1996 and Nanochilina Frýda, 1998, as well as the subgenus Palaeozygopleura (Rhenozyga) Frýda, 2000, are reported for the first time in the Devonian of the Western Hemisphere.
   The gastropod fauna includes members of three (i.e., Archaeogastropoda, Caenogastropoda, and Heterobranchia) of the five modern gastropod subclasses, illustrating that these gastropod lineages were separated from each other since the Early Devonian. New taxa include the new genera Arctozone, Farewellia, and Medfrazyga, represented by the new species Arctozone cooki, Farewellia heidelbergerae, and Medfrazyga clauticae. Further new species include Quadricarina (Quadricarina?) noklebergi, Balbinipleura krawczynskii, Decorospira lepaini, Decorospira? minutula, Palaeozygopleura (Rhenozyga) reifenstuhli, and Nanochilina gubanovi. In addition, the following previously described gastropods are also discussed and illustrated: Alaskiella medfraensis Frýda and Blodgett, 1998; Alaskacirrus bandeli Frýda and Blodgett, 1998; and Kuskokwimia moorei Frýda and Blodgett, 2001a
Přispěvatel
    Česká geologická služba
Kód přispěvatele
    ČGS (UNM)
Zdrojový formát
    U
Datum vložení
    31. 3. 2008
Datum importu
    8. 8. 2012