The Echinoid Directory

Contributed by Andrew Smith, July 2011

Desmechinus H. L. Clark, 1923, p. 342

Diagnostic Features	Medium-sized; low and depressed in profile Apical disc hemicyclic with oculars I and II broadly insert. Periproct displaced strongly towards genital 1. Suranal plate inconspicuous. Ambulacra trigemminate with pore-pairs in arcs forming broad adradial band. Interambulacral plates broad with 3-4 small, subequal tubercles forming a horizontal row. Test sculpted, especially on oral surface, with small pits along horizontal sutures. Base of tubercles indented giving a stellate appearance, and plates wih reticulate epistromal ridges. Peristome small with deep, sharp buccal notches. Buccal membrane naked or with small platelets only. Spines short, simple, with axial cavity.
Distribution	Recent, China Sea
Name gender	masculine
Type	Desmechinus anomalus Clark, 1923, p. 342 by original designation.
Species Included	D. anomalus Clark, 1923; Recent, China Sea. D. versicolor (Mortensen, 1904); Recent, Malay Archipelago D. rufus (Bell, 1894); Recent, Malay Archipelago
Classification and/or Status	Camarodonta, Temnopleuroida, Trigonocidaridae.
Remarks	See Mortensen, T. 1943. A monograph of the Echinoidea III.2 Camarodonta 1. Orthopsidae, Glyphocyphidae, Temnopleuridae and Toxopneustidae. C. A. Reitzel, Copenhagen.