Record details

Title
    New early Devonian gastropods from the families Crassimarginatidae (new family) and Scoliostomatidae (new family), Royal Creek Area, Yukon Territory, Canada
Statement of responsibility
    Jiří Frýda, Robert B. Blodgett, Alfred C. Lenz
Author
    Blodgett, Robert B.
    Frýda, Jiří
    Lenz, Alfred C.
Language
    anglicky
Source title - serial
    Journal of paleontology
Vol./nr.
    Vol. 76, no. 2
Pages
    p. 246-255
Year
    2002
Notes
    2 pl., 2 s.bibl.
    il.
    Zkr. název ser.: J. Paleont.
Subject group
    Barrandien
    devon-spodní
    Gastropoda
    nový taxon
    paleobiogeografie
    pražská pánev
Geographical name
    ČR-Čechy
    Kanada-Yukon
    Koněprusy (Beroun)
Keyword
    Area
    Canada
    Crassimarginatidae
    Creek
    Devonian
    Early
    Families
    Family
    Gastropods
    New
    Royal
    Scoliostomatidae
    Territory
    Yukon
Abstract (in english)
   Two new distinctive families, Crassimarginatidae and Scoliostomatidae, each characterized by unusual gerontic apertural morphotypes, are established on the basis of study of the richly diverse Lower Devonian gastropod fauna of the Road River Formation in the Royal Creek area, Yukon Territory. The Early Devonian genus Crassimarginata Jhaveri, 1969, is transferred from the family Palaeotrochidae and placed, together with the new genus Yukonoconcha, into the new family Crassimarginatidae, hich is characterized by a pupiform shell with an explanate outer apertural lip in the gerontic growth stage. The new family Scoliostomatidae unites Devonian gastropod genera (Scoliostoma Braun, 1838; Brilonella Kayser, 1873; Anarconcha Horný, 1964; Eoscoliostoma new genus; Mitchellia Koninck, 1877; and Pseudomitchellia new genus), which are characterized by a distinctive, free, twisted (both outwards and backwards) gerontic final half whorl.
   More detailed morphological comparison of members of this family has allowed their division into two new subfamilies: the Scoliostomatinae and Mitchelliinae. New genera include Yukonoconcha, Eoscoliostoma, and Pseudomitchellia. The former two genera are represented each by a single new species from Yukon Territory, Yukonoconcha pedderi and Eoscoliostoma norrisi. The latter genus is represented by two species, the type Pseudomitchellia bohemica (Perner) from the Koněprusy Limestone (Pragian) of the Czech Republic and Pseudomitchellia macqueeni new species from Yukon Territory
Contributor
    Česká geologická služba
Contributor code
    ČGS (UNM)
Source format
    U
Entered date
    21. 8. 2007
Import date
    8. 8. 2012