Palaina latecostata (Mousson, 1870) Mousson, 1870

Neubert, Eike & Bouchet, Philippe, 2015, The Diplommatinidae of Fiji - a hotspot of Pacific land snail biodiversity (Caenogastropoda, Cyclophoroidea), ZooKeys 487, pp. 1-85 : 38

Taxon classification Animalia Mesogastropoda Diplommatinidae

Palaina latecostata (Mousson, 1870) comb. n. Fig. 79-81

Diplommatina godeffroyana var. latecostata Mousson 1870, Journal de Conchyliologie, 18: 183. Type locality: Viti Levu.

Palaina (Palaina) godeffroyana latecostata, - Kobelt 1902, Cyclophoridae : 399.

Type material.

Lectotype, here designated, ZMZ 526679/a, Fiji, Viti Levu, coll. Mousson ex Graeffe 1868. - Paralectotypes ZMZ 526679/6.

Material.

ZMZ 526686b/5, Viti Levu, “Tatatan” [a place name we could not identify], Graeffe 1872; ZMZ 526685/8, Fiji, Island of Ovalau, Graeffe 1866; ZMZ 526682b/7, Viti Levu, Graeffe 1872 [as Diplommatina godeffroyana ].

Diagnosis.

Shell sinistral, small, bulb well developed, periomphalum compressed, aperture circular, peristome with a faint labial callus, columella obliquely twisted, bulb lamella present.

Description.

Shell sinistral, small, broadly oval, whitish to greenish; protoconch acute, granulated; last whorl not constricted, slightly ascending; bulb well developed; umbilicus closed, periomphalum compressed; sculpture of teleoconch whorls with widely spaced ribs; aperture circular, simple, adhered to the last whorl; peristome with a faint labial callus; oblique view into the aperture revealing a strong columellaris; internally, columella obliquely twisted, forming a horizontal lamella in its lower third; a moderately strong bulb lamella present, in some specimens entering the parietum as a thick lamella; small parietalis present.

Operculum corneous, with a long lamella on the outer surface, internally smooth, OD = 0.55.

Measurements.

Lectotype (Fig. 79): H = 3.2; D = 1.73; PH = 1.35; PD = 1.22; W = 6.5.

Distribution.

Ovalau and the hitherto mysterious locality “Tatatan” (or Tatatau?) on Viti Levu (possible Cautata, NE of Suva).