Spondylus deforgesi Lamprell & Healy, 2001
LAMPRELL, K. L. & J. M. HEALY. 2001. Spondylidae (Bivalvia) from New Caledonia and adjacent waters. Mémoires du Muséum National d’Histoire Naturelle, 185: 111-163 (In: P. Bouchet & B. A. Marshall Eds., Tropical Deep-Sea Benthos 22). [p. 119, figs. 3A-3C, 10D, 15A]
2001 Spondylus deforgesi Lamprell & Healy, 2001
K. L. Lamprell & J. M. Healy, 2001, figures 3, 10, 15
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«TYPE MATERIAL. — Holotype and 5 paratypes MNHN.
TYPE LOCALITY. — New Caledonia, Grand Récif Sud, 22°41' S, 167°00' S, 49 m [LAGON, sta. 364].
MATERIAL EXAMINED. — New Caledonia. LAGON: sta. 364, Grand Récif Sud, 22°41' S, 167°00' S, 49 m, 1 pv (holotype, Figs 3 A-C, 15 A). — Sta. 472, Surprise Atoll, 18°26' S, 163°05' E, 48 m, 2 Iv (paratypes). — Sta. 771, E. of Ponérihouen, 21 °09' S, 165°42' E, 34 m, 1 Iv. — Sta. 1154, near Belep Is, 19°08' S, 163°19' E, 40 m, 1 Iv.
EXPEDITION MONTROUZIER: sta. 1318, Grand Récif de Koumac, 20°41.4' S, 164°14.8' E, 20-30 m, 1 Iv. BATHUS 1: sta. DW678, Passe de Touho, 20°49' S, 165°19' E, 94-100 m, 1 pv, 1 Iv (paratypes). Coral Sea. CHALCAL 1: sta. CP13, 20°51' S, 158°37' E, 70 m, 1 Iv. - Sta. DC17, 19°12' S, 158°56' E, 44 m, 1 Iv. — Sta. DC26, 19°11' S, 158°35' E, 48 m, 2 Iv. — Sta. DC41, 20°35' S, 158°47' E, 67 m, 1 Iv. CORAIL 2: sta. DW10, 20°52' S, 161 °41' E, 60 m, 13 lv, 2 rv. — Sta. DW18, 20°44' S, 161 °00' E, 69 m, 5 Iv. — Sta. DW31, 19°25' S, 158°45' E, 57 m, 6 Iv. — Sta. DW41, 19°22' S, 158°32' E, 52 m, 1 Iv. — Sta. DW43, 19°21' S, 158°26' E, 52 m, 1 Iv. — Sta. DW67, 19°15' S, 158°37' E, 66 m, 1 Iv. — Sta. DW76, 19°12' S, 158°33' E, 53 m, 1 pv (paratype Fig. 10 D). — Sta. DW102, 19°09' S, 158°30' E, 58 m, 6 Iv. — Sta. DW103, 19°01' S, 158°32' E, 58 m, 2 lv, 1 rv. — Sta. CP112, 19°23' S, 158°44' E, 62-74 m, 2 Iv (paratypes). — Sta. DW117, 19°25' S, 158°32' E, 52 m, 1 Iv. — Sta. DWl18, 19°25' S, 158°28' E, 52 m, 1 Iv. — Sta. DW138, 19°34' S, 158°18' E, 31 m, 1 Iv. DISTRIBUTION. — Known only from New Caledonia and the Chesterfield-Bellona plateau. Alive at 49-100 m, valves in 30-94 m.
DESCRIPTION. — Shell to 34.8 mm in height, elongate ovate, thin, inequivalve, the rv deeper, auricIes comparatively small. Lv depressed; sculpture of 5 (4-6) well defined, rounded, principal radial ribs; interstices wide, with one primary secondary radial rib and several radial ribs of lesser strength; principal ribs ornamented with low nodulous spines and, towards the margins, a few irregular, strong, depressed palmate spines; internal excavation under the hinge plate very shallow, margin strongly and unevenly crenulate, with the external ribs visible internally, scalloping the margin. Rv convex, much deeper than Iv; sculpture similar to lv; attachment area small; internal excavation under hinge plate moderately shallow, external ribs visible internally; crenulated margin strong and uneven with the ribs raised at the margin. Colour variable with orange, red or tan-brown and white being the principal colours, palmate spines white, yellow or red; internally valves blue white with some external colour visible, margin usually darker coloured.
Measurements of holotype: Height 34.8 mm, width 32.1 mm, depth of pv 16.2 mm. REMARKS. — Spondylus deforgesi is a small species characterised by a moderately depressed lv, moderately deep rv and sparse palmate and finger-like depressed spines. It is similar in colour and size to S. maestratii and can also be compared with S. foliaceus Schreibers, 1793, which has similar spination (particularly in juvenile specimens). For comparisons between S. deforgesi and these species, see Tables 1 and 4.
ETYMOLOGY. — Named for Dr Bertrand RICHER DE FORGES who led numerous ORSTOM expeditions.»
KEVIN LESLIE LAMPRELL & JOHN M. HEALY, 2001
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