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  • for which the shell is a loosely coiled, gradually expanding dextral torticone with a slightly depressed whorl section. Siphuncle small, ventral, submarginal...
    1 KB (91 words) - 20:37, 17 December 2021
  • Thumbnail for Oncocerida
    cyrtoconic brevicones. More advanced forms include gyrocones, serpenticones, torticones, and elongate orthocones and cyrtocones, reflective of the different families...
    5 KB (681 words) - 00:11, 30 November 2021
  • characterized by exogastric (or rarely endogastric) gyrocones, brevicones, and torticones. that tend to develop vestigial actinosiphonate deposits and subtriangular...
    2 KB (154 words) - 19:58, 28 April 2021