Record details

    Carcassonnella, a new Lower Ordovician bellerophontiform mollusc with dorsally located retractor muscle attachments (Class Tergomya)
Statement of responsibility
    Radvan J. Horný, John S. Peel = John S. Peel
    Horný, Radvan J.
    Peel, John S.
Source title - serial
    Věstník Českého geologického ústavu (Bulletin of the Czech Geological Survey)
    Vol. 71, no. 4
    p. 305-331
    6 obr., 4 fot., 13 pl., 2 s.bibl.
    České, francouzské resumé
    Zkr. název ser.: Věst. Čes. geol. Úst. (Bull. Czech geol. Surv.)
Subject group
    nový taxon
    popis taxonů
Subject category
Geographical name
    Montagne Noire (Francie)
Abstract (in english)
   Carcassonnella, a new slit-bearing tergomyan mollsc of the Order Cyrtonellida, is described on the basis of the species Gamadiscus courtessolei Yochelson, 1982 from the Lower Ordovician (Tremadoc-Arenig) of the Montagne Noir, southern France. An internal mould with muscle scars, previously identified as ? Megalomphala sp. indet. Yochelson, 1982, is re-assigned to C. courtessolei following the discovery of five additional specimens with muscle scars. The muscle scar pattern, with the largest retractor scars in a dorsal position, confirm the relationship of Carcassonnella with Cyrtolites and Sinuitopsis, and to the advanced cyrtonellid tergomyan Thoraspira. Carcassonnella is thus the oldest known cyrtonellid mollusc possessing a slit and selenizone in which the assignment to the Cyrtonellida is confirmed by the preservation of dorsally located retractor muscle scars.
   The mode of life of Carcassonnella, including traces of failed predation, and the classification of cyrtonellid molluscs are briefly discussed
    Česká geologická služba
Contributor code
    ČGS (UNM)
Source format
Entered date
    28. 3. 2008
Import date
    8. 8. 2012