Freyella microspina Verrill 1894

Freyella microspina Verrill, 1894

Freyella microspina Verrill, 1894:285.—Korovchinsky and Galkin. 1984:1214 [key].

Freyella trispinosa H.L. Clark, 1941:65–66.—Korovchinsky and Galkin, 1984:1214 [key].

MERISTICS.—Arms = 10–13, R = 95–140 mm (estimated), r = 5–11.5 mm, R/r = 12–19/1, length of gonadal region = 20–33 mm, length of longest arm spine = 7 mm.

DIAGNOSIS.—[80.a] Madreporite large; [100.b] madreporite rough, irregular; [110.b] abactinal disc plates small, tumid, roundish; [120.a] abactinal disc plates scattered in membrane; [130.a] abactinal disc plates bearing central group of 1–5 short, sharp spinelets; [170] number of arms 10–13; [205.a] gonadal region of arms 20–33 mm long, rather sturdy; [210.b] abactinal arm plates tumid; [220.b,c] abactinal arm plates in irregular mosaic; [240.a] abactinal arm plates bearing roughtly 2 rows of short, sharp spinelets; [280.a] marginals small; [290.c] marginals conical; [310.a] marginals bearing one large acicular spine; [320.b] adambulacral plates slightly longer than high, with long truncate prolongation at inner distal edge; [330.e] adambulacral plates knobbed; [340.a] furrow margin straight; [350] furrow spines usually absent, sometimes one short spinelet on distal prolongation; [360.a,b] furrow spines acute or clavate; [370.a,b] one furrow spine proximal, one distal; [380] number of subambulacral spines 1 or 2; [390.a,b,c] subambulacral spines large, stout, truncate or capitate in gonadal region, aciculate beyond; [420.b] ambulacral plates small, delicate; [430.e] ambulacral plates dumbbell-shaped; [470.a] tubefeet rather delicate; [480.c] mouth plates moderately large; [490.c] mouth plates longer than wide, wider at distal than at proximal end; [500] number of preoral spines per mouth plate 3; [510.a] preoral spines moderately long, acicular; [520.b] preoral spines directed laterally, meeting across ambulacral groove, so appearance is of 3 more or less continuous rings of calcite around the actinostome; [530] number of lateral oral spines per mouth plate 1; [540.c,d] lateral oral spines short, flat, truncate, broadly expanded at tip; [550.b] lateral oral spines lying beneath preoral spines and meeting the lateral orals of adjoining mouth plates; [570.b] suboral spines large, usually capitate; [580.b] suboral spines below center of mouth plate; [620.a,b,e] pedicellariae on both surfaces of disc and arms; [630.b] pedicellariae rather large.

COLOR.—Unknown.

TYPE.—USNM 7821 (arm fragments) (holotype), Albatross Sta 2220, off Nantucket, 39°43′N, 69°23′W, 1928 m.

MATERIAL EXAMINED.—Holotype; 1 specimen, USNM 7805, Albatross Sta 2192, S of Nantucket, 1939 m; 1 specimen, USNM E20799, Pillsbury Sta 681, off Surinam, 8°11.5′N, 56°12′W, 2734 m; type of Freyella trispinosa, MCZ 3825, Atlantis Sta 2969A, off Bahia de Guantanamo, Cuba, 1847 m.

DISTRIBUTION.—Off Nantucket; southern coast of Cuba; Surinam; 1847–2734 m.