Depressipoma kwajaleina, Mclean, 2012

Mclean, James Hamilton, 2012, New species and genera of colloniids from Indo-Pacific coral reefs, with the definition of a new subfamily Liotipomatinae n. subfam. (Turbinoidea, Colloniidae), Zoosystema 34 (2), pp. 343-376 : 368-370

Depressipoma kwajaleina n. sp.

( Fig. 14 A-C)

TYPE MATERIAL. — Holotype: Kwajalein Atoll, Marshall Islands, 9°15’N, 167°30’E, ocean side of reef, sediment sample at 20 m, VII.2007, Wes Blackater for Bret Raines, H 1.7, D 3.2 mm ( LACM 3213 ).

TYPE LOCALITY. — Kwajalein Atoll, Marshall Islands.

DISTRIBUTION. — Known only from the holotype.

ETYMOLOGY. — After the type locality, Kwajalein Atoll, Marshall Islands.

DESCRIPTION

Shell ( Fig. 14 A-C)

Of 2.7 whorls; profile very low, whorls with strong peripheral angulation nearly midway on whorl; whorls rounded and inflated above and below angulation. Axial sculpture of 27 projecting ribs, weakly spinose and projecting in early whorls, becoming less spinose in final whorl. Spiral sculpture of narrow cords, forming radially elongate cancellations; upper half of whorl with three weak cords, lower with three cords; emergent cord obscured. Umbilical slope broad, obscured by agglutinated deposition, partially obstructed by short extension of inner lip, forming short tongue. Final lip massive, extending for ∕₄ of final quarter whorl, with successively decreasing layers of deposition, with indentations conforming to spiral sculpture. Aperture slightly oblique, plane of aperture aligned with coiling axis. H 1.7, D 3.2 mm (holotype).

Operculum

Unknown. REMARKS

The single holotype specimen is poorly preserved and has a hole in the base on the last quarter whorl. It is clearly not the same as Liotipoma laddi n. sp., from Eniwetok, Marshall Islands, which has a more rounded profile and narrower spiral cords on the base.

Figures

FIG. 14. — A-C, Depressipoma kwajaleina n. gen., n. sp.holotype (LACM 3213),Kwajalein Atoll,Marshall Islands,20 m,H 1.7,D 3.2 mm; D-F, Depressipoma laddi n. gen., n. sp. holotype (USNM 648301), Elugelab Islet, Eniwetok Atoll, Marshall Islands, H 1.4, D 3.3 mm. Scale bars: 1 mm.