Revision of the pentacrinid stalked crinoids of the genus Endoxocrinus (Echinodermata, Crinoidea), with a study of environmental control of characters and its consequences for taxonomy Author David, Jerome Author Roux, Michel Author Messing, Charles G. Author Ameziane, Nadia text Zootaxa 2006 1156 1 50 journal article 50584 10.5281/zenodo.172265 20ced0ab-42ec-4de6-bab0-b3da6529bae9 1175­5326 172265 Subgenus Diplocrinus Döderlein, 1912 Type species of the subgenus: Pentacrinus maclearanus Thomson, 1872 b. Synomymy: Cenocrinus ( Diplocrinus ) Döderlein, 1912 : 21 ; Diplocrinus A.H. Clark, 1923 : 11 ; Diplocrinus ( Diplocrinus ) Roux, 1977 : 64 ; Endoxocrinus ( Diplocrinus ) David, 1998: 202 (unpublished data) and Roux et al., 2002 : 820. Emended diagnosis A subgenus of Endoxocrinus with Br2ax in all brachitaxes, very rarely Br1ax or Br3ax; number of internodals per mature noditaxis strongly variable; usually distal callus at stalk end; number of cirrals per cirrus 19–35 (mode usually <30), each cirral relatively long (usually> 1.1 mm ); orientation of proximal cirri variable. Included species Pentacrinus alternicirrus Carpenter, 1882 (= Isocrinus sibogae Döderlein, 1907 ); Pentacrinus maclearanus Thomson, 1878 ; Pentacrinus wyvillethomsoni Jeffreys, 1870 .