Karoceras

Last updated

    Karoceras
    Scientific classification OOjs UI icon edit-ltr.svg
    Domain: Eukaryota
    Kingdom: Animalia
    Phylum: Mollusca
    Class: Cephalopoda
    Subclass: Nautiloidea
    Order: Oncocerida
    Family: Karoceratidae
    Genus: Karoceras
    Roussanoff, 1909

    Karoceras is a genus of oncocerid nautiloids that lived during the Silurian and possibly Early Devonian, type genus for the Karoceratidae. The shell is a compressed, exogastric cyrtocone, section sub ovoid. The siphuncle is ventral, near the outer, externally convex curvature. Septal necks flair outwardly, segments are inflated ventrally and are straight dorsally, a character of the family.

    Karoceras is the only member of the Karoceratidae that is actinosiphonate, a character produced by lamellae projecting radially inward toward the middle of the siphuncle from the connecting rings.

    This genus has been found in central Europe in the region of the Czech Republic and on Novaya Zemlya.

    References