Granulifusus guidoi, 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 : 34-36

Granulifusus guidoi sp. nov.

urn:lsid:zoobank.org:act:8630D56D-6613-46EA-BE2D-3F0F4020FC1C

Fig. 8 E–H

Latirus kurodai – Mallard & Robin 2005: pl. 45, lower left image (not of Okutani & Sakurai 1964). — Poppe 2008: pl. 348, figs 1–2 (not of Okutani & Sakurai 1964).

Pseudolatirus kurodai – Mallard & Robin 2017: 153 (not of Okutani & Sakurai 1964).

Diagnosis

Shell strong, slender, fusiform, height up to 31 mm, protoconch of 2.5 whorls. Teleoconch whorls strongly convex, axial sculpture of medium broad opisthocline axial ribs, spiral sculpture of thin, distinct, primary cords, varying slightly in size. Aperture lirate inside, columella with distinct to weak columellar plicae. Teleoconch light tan with light orange-brown canal and caramel-colored spiral cords.

Etymology

Named for Guido Poppe, the author of the landmark Philippine Marine Molluscs and discoverer of many new molluscs in the Philippines and elsewhere, who generously provided some of the type material.

Type material

Holotype

PHILIPPINES: off Aliguay Island , northeast of Mindanao, in 50–150 m ( MNHN IM-2000-33597, ex Snyder collection).

Paratypes

PHILIPPINES: 1 specimen, same data as for holotype, SL 30.7 mm ( MNHN- 2000-33598); 1 specimen, trawled off Aliguay Island, 80–150 m, SL 30.7 mm ( ANSP 456853); 1 specimen, trawled off Aliguay Island, 100–150 m, 25.5 mm ( NMP).

Description

Shell slender, fusiform, of average size for genus. Protoconch multispiral, of 2.5 smooth whorls in holotype, with 4 axial riblets on last whorl, pale grey-orange. Transition to teleoconch marked by groove between last riblet and first teleoconch axial rib. Teleoconch of 8–9 convex whorls, suture deep, adpressed. Axial sculpture of distinct ribs, closely spaced, 10 on earlier whorls, increasing to 12 on later whorls. Spiral sculpture of dark cords, often with less prominent and paler secondary cords between them. First whorl with single dark cord, adding roughly one cord per whorl, with 7 cords on penultimate whorl. Cords continue to anterior end of canal, crowding closer together at tip; in holotype, last whorl with about 25 cords. Siphonal canal recurved back from aperture, moderately long, open. Dark spiral cords matched on inner lip by low, light brown lirae. Columellar callus white, with a few spiral lines continuing inward at adapical end of shield. Two stronger rounded columellar plicae situated towards aperture and one much weaker towards canal. Teleoconch white to light tan with light orange-brown neck; caramel-colored spiral cords on entire shell.

Holotype measurements: SL 30.2 mm, AL (without canal) 8.1 mm, SW 10.1 mm.

Distribution

Known only from the type locality.

Remarks

Granulifusus guidoi sp. nov. is most similar to G. kurodai comb. nov., with which it is often confused. It differs by a multispiral protoconch with more whorls, and a narrower shell with narrower aperture. It is also similar to Okutanius ellenae gen. et sp. nov., which has white cords with dark interspaces on the teleoconch whereas G. guidoi sp. nov. has dark, caramel-colored cords with light tan interspaces.

In the absence of data on radula and molecular phylogeny, we tentatively assign this species to Granulifusus based on shell similarities to such sequenced species as G. annae sp. nov.

Figures

Fig. 8. A–B. Granulifusus kurodai (Okutani & Sakurai, 1964) comb. nov., paratype 1, SL 35.1 mm (NSMT-Mo58524). C–D. Fusolatirus sp. aff. luteus Snyder & Bouchet, 2006 (paratype 3 of Pseudolatirus kurodai, see the text), SL 21.5 mm (NSMT-Mo70270). E–H. Granulifusus guidoi sp. nov. E–F. Holotype, SL 30.2 mm (MNHN IM-2000-33597). G–H. Paratype, SL 30.7 mm (MNHN IM-2000- 33598). All shells at the same scale.