Taeniogyrus Semper, 1868, 1867

O’Loughlin, P. Mark, 2007, New apodid species from southern Australia (Echinodermata: Holothuroidea: Apodida), Memoirs of Museum Victoria 64, pp. 53-70 : 58

Taeniogyrus Semper, 1868

Figures 2a, 3a,b, 4–7

Diagnosis (as emended by Rowe, 1976). Chiridotid genus with wheels and sigmoid ossicles present, scattered, or in groups or clustered into papillae; wheels with serrations continuous around the inner margin; tentacles 10 or 12.

Species in southern Australia. Taeniogyrus heterosigmus Heding, 1931 ; T. papillis O’Loughlin sp. nov.; T. roebucki

( Joshua, 1914); T. tantulus O’Loughlin sp. nov.

Remarks. An abundance of T. roebucki (Joshua) material from southernAustralia, including the types, is present in the collections of Museum Victoria and was available for comparative examination. T. roebucki differs from the other 3 Taeniogyrus species in southern Australia in having only 2 pairs of digits per tentacle. Rowe (1995) reported T. heterosigmus Heding as known only from the type locality (Koombana Bay in SW Australia). I have found specimens at Normanville in Gulf St. Vincent in South Australia, in the rock and sediment shallows (NMV F74612 (1), F82706 (4), F82707 (5)), and confirmed their identity with the type (ZMH E.5032). T. heterosigmus differs in 3 significant ways from the other 3 species of Taeniogyrus in southern Australia: dense round clusters of wheels in the body wall; 2 series of ciliated funnels along the coelomic wall, in the left lateral and right ventral interradii; multiple branching gonad tubules. T. heterosigmus is similar to T. roebucki : sigmoid hooks significantly larger than wheels; tentacle rods with lateral denticulations that are papillate or sub-columnar, never with additional fine spinelets apically. In T. heterosigmus the wheels are in rounded dense clusters; in T. roebucki wheels are in close irregular bands adjacent to the longitudinal muscles, and sparse mid-interradially. In T. heterosigmus the hooks are scattered in all interradii; in T. roebucki hooks are aligned transversely in paired series over the edges of longitudinal muscles.