Bolma recens ( Dell, 1967 )

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 : 109-110

Bolma recens ( Dell, 1967)

Fig. 44E–F

Incilaster recens Dell, 1967: 305 , figs 6–7, text-fig. 8.

Type loc.: Kiwi Seamount , 30.75° S, 173.25° E, ca 500 km north of New Zealand, 358–677 m.

Bolma clemenceae Bozzetti, 2010: 11 .

Type loc.: Lavanono , southern Madagascar.

Bolma recens – Beu & Ponder 1979: 32, fig. 11h–i. — Marshall 1979: 549. — Alf & Kreipl 2011: 37, pls 152–154. — Castelin et al. 2017 (molecular sequence data). — Araya, Alf & Aliaga 2023: 427, fig. 1e–h.

Material examined

WALTERS SHOAL – slopes • 1 living specimen; stn DW4890; 33°09′ S, 43°59′ E; depth 492–588 m; 4 May 2017; DNA tissue sample; MNHN-IM-2013-64409 • 1 living specimen; same collection data as for preceding; DNA tissue sample; MNHN-IM-2013-64411 • 1 living specimen; same collection data as for preceding; DNA tissue sample; MNHN-IM-2013-64412 • 2 empty shells, juvenile; stn DW4898; 33°09′ S, 44°01′ E; depth 652–668 m; 6 May 2017; MNHN .

Distribution

Widely distributed in the Indo-West Pacific; recorded from the northern Mozambique Channel, southern Madagascar, the Philippines ( Araya, Alf & Aliaga 2023) and the south-western Pacific ( Castelin et al. 2017). On Walters Shoal it was found alive at only one station (492–588 m), dredged on coarse sand with rocks.

Remarks

Bolma recens is easily separated from B. mainbaza on account of its strongly bicarinate whorl periphery, with fine spiral cords between the peripheral carinae. The spire angle is also usually broader. Of the two species, B. recens is evidently considerably less abundant on Walters Shoal and the limited data available suggest that it occurs at somewhat greater depths (living specimens> 400 m).

Figures

Fig. 44. A–D. Bolma mainbaza Alf, Maestrati & Bouchet, 2010, Walters Shoal, stn DW4881, shell (height 23.0 mm) and operculum (maximum diameter 8.5 mm) (MNHN). E–F. Bolma recens (Dell, 1967), Walters Shoal, stn DW4890, height 19.1 mm (MNHN-IM-2013-64411, images courtesy of P. Maestrati).