Turridrupa fedosovi Stahlschmidt, Puillandre, Olivera & Kantor, 2025

Stahlschmidt, Peter, Kantor, Yuri I., Zuccon, Dario, Olivera, Baldomero M. & Puillandre, Nicolas, 2025, Revision of the genus Turridrupa (Gastropoda, Turridae) with description of 15 new species, Zootaxa 5708 (1), pp. 1-66 : 49-50

Turridrupa fedosovi Stahlschmidt, Puillandre, Olivera & Kantor sp. nov.

( Figs. 17 G–K )

Type material

HOLOTYPE: New Caledonia, KANACONO , Stn DW4706 SW Isle des Pins , 22°47'S; 167°24'E, 343–355m, 19.2 mm ( MNHN-IM- 2013-68165, Figs. 17 G–I ).

PARATYPE 1, 17.3 mm, New Caledonia, Grand Passage , 250–350 m, by commercial dredging ( PS-1065 , Figs. 17 J–K ) .

Sequenced material

Holotype (MNHN-IM-2013-68165).

Type locality:

New Caledonia, SW Isle des Pins , 22°47'S; 167°24'E, 343–355m ( KANACONO , Stn DW4706 ).

Material examined

Only known by the type material.

Distribution

So far only know from New Caledonia in depths between 250 and 355 m.

Description

Shell medium-sized for genus, up to 19.2 mm in height with 7 to 8 teleoconch whorls; broadly fusiform to biconic in shape, with spire about 1.2 times height of aperture including siphonal canal; suture deeply indented; siphonal canal constricted, curved to right, terminally truncate, barely indented, rostrum with slight fasciole and false umbilicus; anal sinus deep, U-shaped, at the termination of the second spiral cord of the spire-whorls; parietal callus-pad well developed and thick; lip preceded by a low broadly convex varix.

Spire whorls with 3–4 subequal spiral cords (4th cord may be fully visible or barely showing at suture); 2nd and 3rd spiral cords slightly stronger and situated on the periphery; spiral cords narrower than their intervals, all spiral cords with laterally elliptical and shallow gemmules, 15 to 16 per spiral on penultimate whorl, stronger developed on sinus cord and third spiral cord; weaker on subsutural cord (specimens from New Caledonia) or low but of higher density (specimens from the Philippines), base of last whorl with about 5 strong spiral cords, plus 7 fine, weak closely-set spiral cords on rostrum, intervals between cords with several fine spiral threads.

Protoconch about 2.5 whorls, last 1.5 whorlswith arcuate opisthocline axial riblets.

Colour buff to slightly pinkish, spiral cords maculated with golden brown spots, mainly situated in the interspaces of the gemmules, varix and parts of the base slightly darker brown.

Remarks

Turridrupa fedosovi sp. nov. is almost indistinguishable from Turridrupa pallurae Cossignani, 2023 and would have not been recognized as a separate species without the help of DNA sequences. However, Turridrupa fedosovi is not a cryptic species since the subsequent examination of the shells revealed subtle but distinguishable differences such as the more compressed and biconic to claviform shell shape (slightly broader and shorter spire /aperture ratio), the more equally sized and spaced spiral cords on the last whorl, and the higher number and density of gemmules on the spiral cord.

Etymology

Named in honour to our friend Alexander “Sasha” E. Fedosov (SMNH) well known for his numerous contributions in malacology in general as well as in the phylogeny and taxonomy of turrids.

Figures

FIGURE 17. Turridrupa pallurae Cossignani, 2023: A–B. Holotype, 17.7 mm, Philippines, Aliguay Island, MMM Cupra Marittima; C–E. ESEM voucher (E: protoconch), 20.1 mm, New Caledonia, LAGON, Stn. DW1148, MNHN-IM-2000-30412; F. Sequenced specimen, 17.8 mm, New Caledonia, CONCALIS, Stn. DW3017, MNHN-IM-2007-35635. Turridrupa fedosovi sp. nov.: G–I. Holotype, 19.2 mm, New Caledonia, KANACONO, Stn. DW4706, MNHN-IM-2013-68165; J–K. Paratype 1, 17.3 mm, New Caledonia, Grand Passage, 250–350 m, PS-1065.