Dillwynella sp.

Kiel, Steffen, Aguilar, Yolanda M. & Kase, Tomoki, 2020, Mollusks from Pliocene and Pleistocene seep deposits in Leyte, Philippines, Acta Palaeontologica Polonica 65 (3), pp. 589-627 : 616

Dillwynella sp.

Fig. 29F .

Material.— One specimen from the Pliocene of Liog-Liog Point : NMNS PM 28441 , W = 4.5 mm, H = 4.0 mm .

Remarks.—Species of Dillwynella can be variable in the height of the spire, as shown for Dillwynella vitrea Hasegawa, 1997 from wood-falls in Japanese waters ( Hasegawa 1997). Two species with a similar spire and a similarly narrow umbilicus as the specimen reported here are D. haptricola Marshall, 1988 living on algal holdfasts, and D. ingens Marshall, 1988 living on wood falls in New Zealand waters ( Marshall 1988).

Figures

Fig. 29. Neomphaline and Vetigastopoda from late Pliocene (A–F, Liog-Liog Point) and Pleistocene (G, Antipolo Point) seep deposit in Leyte, Philippines. A–C. The neomphalid Retiskenea sp. A. NMNS PM 28435, in apical (A1) and apertural (A2) views. B. NMNS PM 28436, apertural view. C. NMNS PM 28437, apertural view. D. The neomphalid Planorbidella sp., NMNS PM 28438, in apical (D1) and apertural (D2) views, and close-up on protoconch (D3). E. Lopheliella? sp., NMNS PM 28442, apertural view, note umbilical slit bordered by distinct ridge. F. The skeneid vetigastropod Dillwynella sp., NMNS PM 28441, apical view. G. The trochoid vetigastropod Solariella sp., NMNS PM 28443, apical view.