Parastrophia cf. ivani Vannozzi, 2017

Walter, Angelo Vannozzi & Renda, Walter, 2024, Sampling the depth: New data on the Caecidae (Mollusca, Gastropoda) from northeastern Papua New Guinea, Zoosystema 46 (14), pp. 327-347 : 346

Parastrophia cf. ivani Vannozzi, 2017

( Fig. 9D, E )

MATERIAL EXAMINED. — Papua New Guinea • 1 sh; New Ireland; KAVIENG 2014 Stn DW4470; 2°45’S, 150°37’E; 163-358 m depth; 3.IX.2014; MNHN • 1 sh; New Ireland; KAVIENG 2014 Stn DW4487; 2°25’S, 149°59’E; 130-153 m depth; 6.IX.2014; MNHN .

DESCRIPTION

Shell small for the genus, colourless, semitransparent. Coiled protoconch small of 0.75 whorls.Uncoiled protoconch conical, slightly curved, ending with a clear varix showing a crenulated edge. Teleoconch conical, virtually smooth, gradually growing, showing a few hardly-visible rings both adapically and abapically. Microsculpture of fine growth lines. Hardly visible longitudinal cordlets occur in the early teleoconch. Aperture simple, slightly dilated and then contracted.Length c. 2.8 mm.

REMARKS

Two specimens, none of them in good condition, were examined. Attribution is tentative due to slight differences with respect to specimens of Parastrophia ivani examined from other localities.

Figures

FIG. 9. — Parastrophia de Folin, 1869 species from deep-water stations from northeastern PNG: A-C, P. megadattilida Pizzini, Raines & Vannozzi, 2013 from Stn DW4463; D, E, P.cf. ivani Vannozzi, 2017 from Stn DW4470 (D) and Stn DW4487 (E). Scale bar: 1 mm.