Pyrgulina angulata (Lea, 1846), new comb.

Cunha, Carlo M. & Salvador, Rodrigo B., 2018, Type specimens of fossil " Architectibranchia " and Cephalaspidea (Mollusca, Heterobranchia) in the Academy of Natural Sciences of Philadelphia, Zoosystematics and Evolution 94 (2), pp. 505-527 : 505

Pyrgulina angulata (Lea, 1846), new comb. Figure 6T

Acteon angulatus Lea, 1846: 256, pl. 36, fig. 57.

Type locality.

Petersburg, Dinwiddie County, Virginia, USA. Type stratum: Yorktown Formation. Age: Late Miocene to Middle Pliocene.

Type material.

Holotype, ANSP IP1521.

Taxonomical reassessment.

This species is better classified in the genus Pyrgulina due to the following conchological features ( Robba 2013): elongated (somewhat turreted) conical shell, convex whorls, distinct subsutural shelf, deep suture, preence of a columellar fold present, teleoconch sculpture consisting of axial ribs (including on the base) overridden by spiral threads.

Campbell (1993: 68) considers Acteon angulatus Lea 1846 a synonym of Melanella angulata (Lea, 1846) ( Eulimidae ), which is clearly not the case. The present species lacks the diagnostic conchological features of the latter genus (and of eulimids in general), such as: a high spire, a smooth teleoconch with fine axial marks, and the absence of a columellar fold ( Warén 1984, Geiger 2016).