Teliocrinus springeri, (Clark, 1909)

Roux, Michel, Améziane, Nadia & Eleaume, Marc, 2009, The genus Teliocrinus (Crinoidea, Echinodermata): a key taxon among pentacrinid stalked crinoids, Zoological Journal of the Linnean Society 155 (1), pp. 22-39 : 37

TELIOCRINUS SPRINGERI (CLARK, 1909)

Synonym: Hypalocrinus springeri Clark, 1909a: 650 ; Hypalocrinus ornatus Clark, 1909a: 651 ; Hypalocrinus liliaceus Clark, 1909b: 150 ; Teliocrinus asper Döderlein, 1912: 22 ; Comastrocrinus springeri Clark, 1912: 254 ; Comastrocrinus ornatus Clark, 1912: 257 ; Comastrocrinus liliaceus, Clark, 1912: 257 ; Teliocrinus springeri Clark, 1923: 10 ; Teliocrinus monarthrus, Clark, 1928: 365 ; Teliocrinus springeri Clark, 1932: 391 ; Teliocrinus springeri Clark, 1946: 20–21 ; Teliocrinus springeri (extant specimens only) Oji, 1990: 423.

Emended diagnosis: A species with IIBr more frequently 4 (up to 55%) or 2 (up to 44%) IIBrax; IIIBr frequently restricted to the axillary (up to 56%), and IVBrax: rare. IBr2ax: short and broad triangular. Transverse synarthry: at IIIBr1+2 or IIIBr2+3. Arm syzygies: with a concave symmorphy having raised centre around the lumen. Distal aboral border of brachials: more-or-less everted, at least in the proximal part of the crown. Distal end of arm: with only rudimentary pinnules over a few centimetres. Rectangular and convex radials, and small basals usually disjointed. Cryptic infrabasals present. Stalk: slender, usually pentagonal to rounded pentagonal in cross section. Number of internodals per noditaxis: 9–16, mode at 11. Infranodal synostoses (cryptosymplexies): flat with areolar lobes lanceolate to losangic, interpetaloid zones covered by dense syzygial stereom with a fine axial groove, and axial lumen filled in by a large meshed stereom either preserving a pentalobate secondary lumen or not. Cirri: slender and delicate, as long as two or more noditaxes, and orientated upwards in the proximal stalk. Cirrus socket: heartshaped taking place on the distal half of the nodal.

Locus typicus: North of the Laccadive Islands, 13°47′49″N, 73°07′00″E; depth 1145 m .

Occurrence: North Indian Ocean from the Arabian Sea to the Bay of Bengal and south-west Sumatra; depth range? 366–1280 m. The detailed locations of the 20 known specimens are listed in Table 1 .

Included subspecies: Hypalocrinus springeri Clark, 1909a ; Hypalocrinus liliaceus Clark, 1909b .