[= Amathinidae: Adelactaeon? schwartzi (Handmann, 1883)]
Actaeon Schwartzi n. f. — Handmann 1883: 168.
Actaeon Schwartzi Handm.— Handmann 1888: 40.
Acteon vindobonensis (Handmann) — Fordinál & Zlinská 1998: 138, pl. 1, fig. 3 [non Leucotina vindobonensis (Handmann, 1882)].
Type material. The holotype was stored in the Kollegium Kalksburg in Vienna, a Catholic private school, but is lost; SL: 5 mm, MD: 3 mm; Hölles (Austria).
Discussion. Handmann (1883) described a thin shell of five whorls with globose last whorl, attaining more than half of the total height, sculpture of broader and narrower, punctate spiral grooves. Columella with small, oblique fold; columellar callus forming narrow, adherent rim delimiting narrow umbilical chink. Fordinál & Zlinská (1998) illustrated a small shell, which corresponds largely to the description of Handmann (1883) (SL: 2.4 mm). It lacks a clear columellar fold, which may be due to its subadult growth stage. We tentatively place this dubious species in the Amathinidae genus Adelactaeon Cossmann, 1895 [type species Myonia japonica A. Adams, 1860; present-day, Japan]
Distribution in Central Paratethys. Sarmatian (Middle Miocene): Vienna Basin: Hölles (Austria) (Handmann 1883); Skalica (Slovakia) (Fordinál & Zlinská 1998).