Spondylus tenuitas Garrard, 1966
GARRARD, T. A. 1966. New species of mollusca from Eastern Australia (Part 2) with notes on some known species. Journal of the Malacological Society of Australia, 1 (10): 3-12, pl. 1. [p. 3, pl. 1, fig. 3]
1966 Spondylus tenuitas Garrard, 1966
T. A. Garrard, 1966, plate 1.
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«Remarks: This very attractive new addition to the genus appears only to have been taken so far from about 80 fathoms 18 miles N.N.E. of Cape Moreton, Queensland, although deep water trawling in other areas may well extend its range. The short spines suggest a shore or reef dwelling form rather than a deep water species, and being a mud dweller the lower valve is not attached. The only other Australian species of similar form and sculpture appears to be the Victorian Miocene fossil, Spondylus pseudoradula McCoy.
Description: Shell almost equivalve, equilateral in early stages, tending to be somewhat produced posteriorly at maturity. Shell a mud-dweller, non-adherent, but position in life unknown. Lower or right valve with six rows of thin major spines, rounded on top and channeled below, with three to five rows of almost vertical prickles between each major row; several additional spines on each edge of valve near dorsal margin. Upper or left valve similarly sculptured but spines less prominent in major rows, lacking altogether near ventral margin, and 12 to 16 rows of almost vertical prickles between each major row, varying somewhat in size. Triangular ligamental area on right valve narrow and very finely grooved axially, with short similar grooves inside edge of left valve; hinge teeth somewhat small; interior margins crenulate; posterior muscle scar roughly circular. Shell white inside and out, occasionally with a light brown flush near umbonal area and sometimes on tips of prickles.
Dimensions: Holotype, length 54 mm., breadth 45 mm., height of conjoined valves 22 mm.
Type locality: Trawled in 80 fathoms, 18 miles N.N.E. of Cape Moreton, due east of Caloundra, Queensland.
Types: Holotype presented to Australian Museum Sydney, where it is registered No. C. 64802, together with four single valves.»
T. A. GARRARD, 1966
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«TYPE MATERIAL. — Holotype (pv) AMS C64802.
TYPE LOCALITY. — Deep water east of Caloundra, southern Queensland.
MATERIAL EXAMINED. — The type material.
Norfolk Ridge. BERYX 11: sta. CP17, 24°48' S, 168°09' E, 250-270 m, 1 lv, 2 rv (Figs 13 D-E). Australia. 1 pv (AMS C30379). — 1 pv (KL). — Off Cape Moreton, southern Queensland, 1 pv, 2 lv, 1 rv (KL). — Off Mooloolooba, southern Queensland, 150 m, 2 lv, 5 rv (KL). DISTRIBUTION. — Southwest Pacific: southern to central Queensland, New Caledonia. Among shell debris, to 250 m.
DESCRIPTION. — Shell height to 65 mm; equivalve, elongate-ovate. Sculpture of 9-10 principal ribs which are ornamented with numerous, short, sharp, depressed spines; interstices with numerous fine ridges ornamented with dense, smaller, fine, sharp spines. Colour white internally and externally, sometimes pink umbonally.
REMARKS. — This is the first record of this rare species from outside Queensland waters.
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. 153]
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Spondylus tenuitas Garrard, 1966; K. L. Lamprell & J. M. Healy, 2001, Spondylidae from New Caledonia and adjacent waters, figures 13D, 13E.
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