Deltocyathus corrugatus Cairns, 1999

Kitahara, Marcelo V. & Cairns, Stephen D., 2009, A revision of the genus Deltocyathus Milne Edwards & Haime, 1848 (Scleractinia, Caryophylliidae) from New Caledonia, with the description of a new species, Zoosystema 31 (2), pp. 233-248 : 243-244

Deltocyathus corrugatus Cairns, 1999 ( Fig. 1G)

Deltocyathus corrugatus Cairns, 1999: 98 .

TYPE MATERIAL. — The holotype is at the NZOI (H 689), and 10 paratypes are deposited at the USNM (94169 [5], and 94170 [5]).

TYPE LOCALITY. — 28°54’36’’S, 167°44’12’’E (Norfolk Islands), 390 m.

NEW RECORDS. — BATHUS 4, stn DW 898, 8 specimens (MNHN-Scl.2008-0019); stn CP 883, 2 specimens (MNHN-Scl.2008-0020); 1 specimen ( USNM 1114161 ) ; stn DW 903, 2 specimens (MNHN-Scl.2008-0021); stn CP 885, 1 specimen (MNHN-Scl.2008-0022); stn CP 889, 3 specimens (MNHN-Scl.2008-0023); 3 specimens ( USNM 1114162 ) ; stn CP 967, 3 specimens (MNHN-Scl.2008-0018).

DISTRIBUTION. — New Caledonia waters from 18°59.93’S, 163°13.55’E to 23°02.53’S, 166°58.18’E, including Loyalty Islands ( Cairns 1995), 250- 600 m. Previous records: from southern Great Barrier Reef, Australia ( Wells 1984) to Norfolk Ridge, New Zealand ( Cairns 1995), 73- 390 m.

DESCRIPTION

Corallum circular. Calice lancetted, lancets correspond to each C3 flanked by C4. Largest specimen examined (BATHUS 3, stn CP 847) 15 mm in calicular diameter and 4.2 mm in height. Corallum usually white but sometimes slightly reddish-brown pigmented. Base flat to slightly convex, having a small scar of previous attachment (during early stages) in centre. All costae well developed. C1-2 more prominent near calicular edge, becoming a row of granules near centre of base. C3 thickest and tallest costae, extending up to 2 mm and normally upturned slightly beyond calicular edge as granulated costal spines. C4 and C3 form a broad three-step ridge. All costae granulated specially near calicular edge, and a small low granule ridge is present beside each C1-2.

Septa hexamerally arranged in 4 complete cycles (S1≥S2>S4>S3). S1 independent, extending half distance to columella and bearing a wide lamellar palus, which is often fused to columella. S2 equal to or slightly less wide than S1, also bearing a pali of same size of P1, forming a crown more recessed from columella than the crown formed by P1. S3 smallest septa, bearing the tallest pali which fuse to inner edge of near P2 by a porous lamella. S4 slightly wider than S3, and have a spinose margin. Each S4 fuses the adjacent P3 through a long porous lamella. All pali equal sized (P1 sometimes dimorphic) and septa and palar faces bear pointed granules.

Fossa shallow with an elliptical papillose columella.

REMARKS

See Remarks of D. ornatus .