Anatoma porcellana Geiger, 2012

Helwerda, Renate A. & Wesselingh, Frank P., 2014, Revision of Scissurellidae, Anatomidae and Fissurellidae (Gastropoda: Vetigastropoda) from the Plio-Pleistocene of the Philippines, Zootaxa 3838 (2), pp. 183-194 : 187-189

publication ID	https://doi.org/ 10.11646/zootaxa.3838.2.3
publication LSID	lsid:zoobank.org:pub:A3B0A5D4-D989-4804-9501-CE4423F146C9
DOI	https://doi.org/10.5281/zenodo.5625969
persistent identifier	https://treatment.plazi.org/id/039287E3-FFFB-FFC5-FF41-F956FA68FE4E
treatment provided by	Plazi
scientific name	Anatoma porcellana Geiger, 2012
status

Treatment

Anatoma porcellana Geiger, 2012 View in CoL

( Figures 8–9 View FIGURES 6 – 9. 6 )

2012 Anatoma porcellana nov. spec.—Geiger: p. 1020–1026, figs 830–833.

Material. Anda5 (1) RGM 961.716, Anda6 (9) RGM 961.718, AndaCliff3 (5) RGM 961.720, Tiep1 (1) RGM 961.721.

Characterization. Shell large, biconical; H 3.95 mm, W 3.97 mm; P eroded, DN 0.13–0.16 mm; shoulder with curved axial cords and 1–3 fine spiral lines; base with spiral and axial cords forming reticulate sculpture; sculpture weakens on lower third of base; aperture rounded; umbilicus closed.

Distribution. Possibly tropical Indian Ocean; southern Japan, Indo-Malayan Archipelago to the Western Pacific, 49–2570 m (Geiger 2012).

Remarks. The studied material mostly conforms to the description by Geiger (2012), although some specimens are larger than 3.2 mm (largest is 3.95 mm). The shoulder occasionally has three fine spiral lines instead of one to two. The density of axial cords on shoulder and base strongly increases on the last whorl of large specimens. P and T1 are eroded in the studied material, yet T1 appears to have only about 11 axial ribs instead of 17–20. The studied material is quite similar in its shape, sculpture and closed umbilicus to Anatoma gephyra Maxwell, 1992 from the late Eocene of New Zealand as well, but the latter has a shorter T1 of only 0.33 whorls.