Ringicula

Helwerda, Renate A., 2015, Acteonidae, Bullinidae and Ringiculidae (Gastropoda: Heterobranchia) from the Plio-Pleistocene of the Philippines, Zootaxa 3990 (2), pp. 197-220 : 215

Ringicula spec 6

( Figures 37–38 )

Material. AndaDeVos (2) RGM 961.758 and RGM 961.832.

Characterization. Shell small; H 1.64 mm, W 0.98 mm; protoconch slightly elevated, 1.2 whorl, DP 0.23 mm; nucleus small, DN 0.11 mm; teleoconch with distinct subsutural ridge and groove; additional sculpture of 8 irregularly spaced spiral grooves on the body whorl; lip not much thickened, probably not full-grown; parietal callus thin, with odd-shaped nodule consisting of triangular part fused to lamella; columella with two rather weak folds.

Figures

FIGURE 34 – 40. 34. Ringicula spec 4. RGM 961.849. Locality Roxas. (a) rear view, (b) oblique apertural view, (c) apertural view, (d) basal view, (e) apical view. 35. Ringicula spec 5. RGM 961.755. Locality AndaDeVos. (a) rear view, (b) oblique apertural view, (c) apertural view, (d) basal view, (e) apical view. 36. Ringicula spec 5. RGM 961.851. Locality Roxas. (a) rear view, (b) apertural view, (c) basal view, (d) oblique apertural view. 37. Ringicula spec 6. RGM 961.832. Locality AndaDeVos. (a) rear view, (b) apertural view, (c) basal view, (d) oblique apertural view. 38. Ringicula spec 6. RGM 961.758. Locality AndaDeVos. (a) apical view, (b) apertural view. 39. Microglyphis angulata nov. spec .. Holotype RGM 961.759. Locality Roxas. (a) rear view, (b) oblique apertural view, (c) apertural view, (d) basal view, (e) apical view, (f) apertural view, (g) apical view. 40. Microglyphis angulata nov. spec .. Paratype RGM 961.833. Locality Tiep 2. (a) apical view, (b) apertural view.