Calliotropis

Helwerda, Renate Ariane, Wesselingh, Frank Pieter & Williams, Suzanne T., 2014, On some Vetigastropoda (Mollusca, Gastropoda) from the Plio-Pleistocene of the Philippines with descriptions of three new species, Zootaxa 3755 (2), pp. 101-135 : 117

Calliotropis spec. 1

( Figures 35–36 )

Material. Anda 1 (1); Anda 2 (2); Anda 4 (2).

Characterization. Shell with rounded whorls, H 0.7 mm, W 0.8 mm; P large, bulbous, granulate, 1.1 whorls, DN 0.22 mm; P/T boundary distinct rib; T with reticulate ornamentation; weak spines on intersections of spiral and axial ribs; microsculpture of discontinuous granulate spiral threads; body whorl with four spiral ribs; aperture rounded; umbilicus moderately wide.

Remarks. These shells are probably all juveniles of a single species that could not be matched with any of the other Calliotropis species in the studied material. It is most similar to C. limbifera ( Schepman, 1908) , but the spiral ribs are placed lower on the whorls in these specimens than in C. limbifera ( Schepman, 1908) , the microscopic threads are spirally instead of axially arranged and the protoconch is less inclined.

Figures

FIGURES 33 – 38. Calliotropidae. 33. Calliotropis limbifera (Schepman, 1908). RGM 608.292. Locality AndaDeVos. (a) rear view, (b) apertural view, (c) apical view, (d) spire detail. 34. Calliotropis limbifera (Schepman, 1908). RGM 608.293. Locality AndaDeVos. SEM detail of protoconch. 35. Calliotropis spec. 1. RGM 608.296. Locality Anda 2. (a) rear view, (b) apertural view, (c) basal view, (d) apical view. 36. Calliotropis spec. 1. RGM 608.297. Locality Anda 4. SEM detail of protoconch. 37. Calliotropis spec. 2. RGM 608.301. Locality Anda 2. (a) rear view, (b) apertural view, (c) basal view, (d) apical view. 38. Calliotropis spec. 2. RGM 608.302. Locality Anda 3. SEM detail of protoconch.