Thrypticotrochus petterdi ( Dennant, 1906 )

Cairns, S. D., 2004, The Azooxanthellate Scleractinia (Coelenterata: Anthozoa) of Australia, Records of the Australian Museum 56, pp. 259-329 : 300

Thrypticotrochus petterdi ( Dennant, 1906)

Trochocyathus petterdi Dennant, 1906: 153–154 , pl. 5, figs. 2a,b (NSW).– Wells, 1958: 262 (listed); 1964: 109 (listed); Veron, 1986: 606 (listed).– Stranks, 1993: 20 (type deposition).

Thrypticotrochus multilobatus Cairns, 1989a: 37 , pl. 19b–g (Qld), new synonym; 1995: 92, pl. 28, figs. d–h ( NZ); 1997: 19, pls. 2h, 5b, 7h,i (remarks).–Cairns & Zibrowius, 1997: 149–150 (remarks).

Thrypticotrochus petterdi .– Cairns, 1989a: 37 (remarks); 1997: 19 (listed).

New records. NEW SOUTH WALES: Kapala 78/27/01, 1, AM G15289. — QUEENSLAND: Franklin 03/99/D10, 1, USNM 1008592; Franklin 03/ 99/D11, 13: 11, USNM 1008591 and 2, ZMUZ; Franklin 03/99/D14, 1, USNM 1008590; Cidaris I 43-2, 13, MTQ G56433.

Types. The holotype of T. petterdi is NMV F41515 ; 2 of 8 additional paratypes areAM G12050. Type Locality: 20 miles (= 32 km) northeast of Port Jackson , New South Wales, 457 m.

The holotype of T. multilobatus is USNM 81901 ; additional paratypes are split among USNM, MNHN, and AM. Type Locality: 5°25'56"N 120°03'39"E (off Tawi Tawi, Sulu Archipelago ), 507 m.

Remarks. In my original description of T. multilobatus Cairns, 1989 , I noted that it was very similar and perhaps conspecific with T. petterdi but seemed to differ from the two paratypes by having wider costae than intercostae. Now that I have examined the holotype, I cannot find any basis to distinguish the two species. The holotype is unusual in that it has six pairs of S5 contained in only two systems for a total of 60 septa, but its costae are much wider than its intercostae and thus consistent with those described for T. multilobatus .