Acremodontina carinata ( Powell, 1940 )

Herbert, David G., 2024, The Vetigastropoda (Mollusca) of Walters Shoal, with descriptions of two new genera and thirty new species, European Journal of Taxonomy 923, pp. 1-119 : 49

Acremodontina carinata ( Powell, 1940)

Fig. 21

Conjectura carinata Powell, 1940: 223 , pl. 28 fig. 8.

Type loc.: between Spirits Bay and Three Kings Islands , northern New Zealand .

Conjectura carinata – Powell 1979: 74, pl. 20 fig. 22.

Acremodontina carinata – Marshall 1995: 102, figs 20–22, 29–30, 56–59.

Acremodontina aff. carinata – Herbert 2015: 84 , fig. 9j–k.

Material examined

SOUTH AFRICA – Eastern Cape • 3 living specimens; off Mbashe River ; stn Q1; 32°18.2′ S, 29°4.1′ E; depth 200–220 m; 18 Jul. 1982; Natal Museum Dredging Programme, R.V. Meiring Naudé leg.; sponge rubble; NMSA V908 .

WALTERS SHOAL – slopes • 1 empty shell; stn DW4893; 33°16′ S, 43°58′ E; depth 623–629 m; 4 May 2017; MNHM.

Distribution

Recorded from off northern New Zealand, 27–805 m (living, 88–221 m) ( Marshall 1995) and the east coast of South Africa (200–220 m, living in sponge dominated communities) ( Herbert 2015). Here recorded also from the slopes of Walters Shoal, at a depth of 623– 629 m.

Remarks

I have previously drawn attention to the occurrence of this genus in the south-western Indian Ocean ( Herbert 2015). A single specimen belonging to the same species was obtained on Walters Shoal. I can find no features by which south-western Indian Ocean specimens can be convincingly distinguished from those from New Zealand and thus consider them to be conspecific.

Figures

Fig. 21. Acremodontina carinata (Powell, 1940). A. Off Mbashe River, E Cape, South Africa, height 2.13 mm (NMSA V908). B. Subadult specimen, Walters Shoal, stn DW4893, height 1.42 mm (MNHN). C. Protoconch of A, scale bar =100 μm.