Marine & Environmental Sciences Faculty Articles
A Revision of the Zenometridae (new rank) (Echinodermata, Crinoidea, Comatulidina)
Document Type
Article
Publication Title
Zoologica Scripta
ISSN
0300-3256
Publication Date
12-21-2001
Keywords
Stalked crinoids, Echinodermata
Abstract
Three genera of unstalked crinoids, Zenometra, Sarametra and Psathyrometra, formerly included in the subfamily Zenometrinae of the family Antedonidae, are removed and placed in a distinct family, the Zenometridae. Diagnostic features include a cavernous centrodorsal cavity, a complete basal circlet with a large central lumen and cirrus sockets with a concave fulcral bowl around the lumen. Sarametra nicobarica is synonymized under S. triserialis, which is redescribed in detail. Psathyrometra is redefined and includes only the species P. fragilis, P. congesta and P. bigradata, which are redescribed. P. erythrizon is synonymized under P. fragilis. The four other species formerly included in Psathyrometra are removed to Athrypsometra gen. n., retained in the Antedonidae. The other genera formerly included in the Zenometrinae are considered incertae sedis in the family Antedonidae pending detailed re-examination. Cladistic analysis using the antedonids, Poliometra prolixa (a former zenometrine) and Florometra serratissima, and the thalassometrid, Oceanometra annandalei, as outgroups produces the following tree: (O. annandalei((F. serratissima/P. prolixa)(((P. fragilis/P. congesta)P. bigradata) (S. triserialis/Z. columnaris)))).
DOI
10.1046/j.1463-6409.2001.00062.x
Volume
30
Issue
3
First Page
159
Last Page
180
NSUWorks Citation
Messing, Charles G., and Christopher M. White. "A revision of the Zenometridae (new rank)(Echinodermata, Crinoidea, Comatulidina)." Zoologica Scripta 30, no. 3 (2001): 159-180.
Comments
©The Norwegian Academy of Science and Letters