Ophiotoma incredibilis Thuy 2013, sp. nov.

• Main Author: Thuy, Ben
• Format: Other/Unknown Material
• Language: unknown
• Published: 2013
• Subjects: Biodiversity; Taxonomy; Animalia; Echinodermata; Ophiuroidea; Ophiurida; Ophiacanthidae; Ophiotoma; Ophiotoma incredibilis; Northeast Atlantic
• Online Access: https://zenodo.org/record/3844149; https://doi.org/10.5281/zenodo.3844149

Ophiotoma incredibilis sp. nov. urn:lsid:zoobank.org:act: 768EE8E5-D636-4D23-9640-6D22A392265B Fig. 13: 1-3 Diagnosis Species of Ophiotoma with large LAPs displaying a low height/width ratio; outer surface with welldeveloped vertical striation; up to four relatively small spine articulations in shallow notches of the non-elevated distal portion of the LAP; ridge on inner side devoid of thickened parts, composed of two separated parts: a long, oblique, nearly straight, dorso-proximally pointing dorsal one and a shorter ventro-proximally pointing ventral one. Etymology From incredibilis, Latin for “unbelievable”, referring to the surprisingly emotional reactions some colleagues showed when confronted with the discovery of the Blake Nose deep-sea ophiuroid assemblage. Type material Holotype GZG.INV.78549. Paratypes GZG.INV.78550 and GZG.INV.78551. Type locality and horizon Blake Nose, borehole ODP 171B 1049A 20x5, tropical northeast Atlantic; latest Aptian to earliest Albian, Hedbergella trochoidea to Microhedbergella rischi planktonic foraminiferal zones, Early Cretaceous. Additional material GZG.INV.78552 (26 dissociated LAPs). Description Holotype GZG.INV.78549 is a dissociated, very large, proximal LAP; slightly wider than high; dorsal edge straight; distal edge convex; proximal edge irregularly concave, devoid of spurs; ventral third to quarter strongly protruding ventro-proximalwards; ventro-distal tip of LAP weakly protruding, tongue shaped; outer surface with well-developed, rather regular vertical striation composed of coarse, overlapping lamellae replaced by finely meshed stereom in very narrow band along the proximal edge of the LAP. Four relatively small, ear-shaped spine articulations in shallow notches of the non-elevated distal edge of LAP; very weak dorsalward increase in size of spine articulations and of gaps separating them; notches of spine articulations deeply incising vertical striation of outer surface; dorsal and ventral lobes of spine articulations proximally separated by very small notch; ...