Okutanius aikeni ( Lussi, 2014 ) Kantor & Fedosov & Snyder & Bouchet, 2018

Kantor, Yuri I., Fedosov, Alexander E., Snyder, Martin Avery & Bouchet, Philippe, 2018, Pseudolatirus Bellardi, 1884 revisited, with the description of two new genera and five new species (Neogastropoda: Fasciolariidae), European Journal of Taxonomy 433, pp. 1-57 : 44

Okutanius aikeni ( Lussi, 2014) gen. et comb. nov.

Fig. 9 H–I

Pseudolatirus aikeni Lussi, 2014: 10–11 , color images of holotype.

Pseudolatirus aikeni – Mallard & Robin 2017: 151.

Type material

Holotype

South Africa: off Park Rynie , southern KwaZulu – Natal, 110 m, SL 25.6 mm, SW 10.3 mm ( NMSA W9698 /T3896).

Description

Shell strong, fusiform, up to 25.6 mm. Protoconch and uppermost teleoconch whorls eroded, protoconch conical, multispiral, of 3+ whorls (protoconch tip broken off). Teleoconch with regularly strongly convex whorls, with medium long siphonal canal. Aperture broad, oval, with nearly smooth columella with very weak ridges in the lower part, corresponding to spiral cords not completely overlaid by callus. Spiral sculpture of unevenly spaced distinct cords of varying strength; axial ribs strong, weakly opisthocline, and closely spaced, not aligned along the spire. Background colour creamy, with two darker brown spiral bands and more dark shell base. Primary spiral cords white.

Distribution

Only known from the type locality.

Remarks

The dead collected and partially distorted holotype is the only known specimen. In ventral view it is clearly seen that the shell axis is not straight, and the strongly recurved leftwards siphon is the result of abnormal shell growth. Pending knowledge on the body and radula, we tentatively allocate this species to Okutanius gen. nov., based on shell resemblance to sequenced species of the genus.

Figures

Fig. 9. A–G. Okutanius kuroseanus (Okutani, 1975) gen. et comb. nov. A. New Ireland, KAVIENG 2014, stn CP4503, 02°30′ S, 150°44′ E, 191–200 m, SL 18.1 mm, sequenced specimen; for radula, see Fig. 4G (MNHN IM-2013-59070). B. BORDAU 1, stn DW1469, 19°40′ S, 178°10′ W, 314–377 m, SL 15.9 mm. C. Protoconch, New Caledonia, BIOCAL, stn CP105, 21°31′ S, 166°22′ E, 330–335 m. D–E. Loyalty Ridge, MUSORSTOM 6, stn DW391, 20°47′ S, 167°06′ E, 390 m. D. SL 17.3 mm. E. SL 22.3 mm. F. Loyalty Ridge, MUSORSTOM 6, stn DW398, 20°47′ S, 167°06′ E, 370 m, SL 28.1 mm. G. Taiwan. TAIWAN 2000, stn DW34, 22°02′ N, 120°36′ E, 246 m, SL 23.4 mm. H–I. Okutanius aikeni (Lussi, 2014) gen. et comb. nov., holotype, SL 25.6 mm. A–B, D–G at the same scale, H–I not to scale.