Vörös A. szerk.: Fragmenta Mineralogica Et Palaentologica 14. 1989. (Budapest, 1989)
Austriacopsis (Balinula) ? vaceki Haber, 1932 Plate I: 8-9. 1886. Emarginula sp. ind. - VACEK, S. 106, Taf XVIII, Fig. 1. 1932. Austriacopsis ? (Austriacopsis) vaceki Haber, 19 32 - HABER. s. 257. Material: a partially resorbed inner mould specimen (1886/5/55) Measurements : H L W 9.5 24 20 Description : The specimen is a medium-sized, topee-shaped inner mould with a central apex and a rim of two millimetres, bending sharply outward near the peristome almost into a plane. In the curved region, there is the infilling of the anal opening. It is rather high, indicating a thick shell. It is impossible to decide whether the bending of the shell is only an inner character, or it is visible on the outer surface too. The Jhick shell permits to imagine both possibilities. The anal opening is near the peristome, and the print of the shell tends to close round it, but there is an opening toward the peristome more likely because of the preservation. The ornament consists of radial ribs, continuing in short spines on the peristome. Finer ornamental elements are not reflected on the inner mould. Remarks : If a peristomial slit were justified by another find, the right systematic position would be within Emarginula, but the hardly asymmetric position of the exhalant opening could also be a basis for further discussions about the exact systematic place. Within Austriacopsis, the subgenus Balinula is defined as to have an anal trema near the peristome, but it bears an apex shifted almost above the posterior margin of the peristome. The systematic meaning of this difference also needs a clearing up. Superfamily Trochacea Rafinesque, 1815 Family TROCHIDAE Rafinesque, 1815 Subfamily uncertain Genus Vacekia gen. n. Type species : Vacekia gardana (VACEK, 1886), see below. Diagnosis : Medium-sized, slightly pupiform shell with somewhat convex whorls. Periphery strongly rounded on adult last whorl but subangular in juvenile stage. Base convex, anomphalous. Peristome not in one plane, outer lip strongly prosocline, columellar lip vertical. Ornament of nodose spiral laces with fine, regularly spaced collabral riblets between their pairs. False transverse costae, built up of nodes of different growth stages, less prosocline than growth-lines which run parallel to riblets. Axially elongated aperture. Remarks : Most genera, comparable to VACEKIA gen. n., can be found in Trochidae (Chilodontinae and Monodontinae) , but without the exact knowledge of the peristome further precisions in subfamiliar position cannot be given. The juvenile shell and the characters of the ornament are similar to those of Pseudoclanculus (Chilodontinae^ , but they clearly differ in the shape of the last whorl, because it does not follow the earlier coiling in Vacekia. Agathodonta, from the same subfamily, resembles also, but it has more convex whorls, a deeper suture and a less prosocline outer lip. In Monodontinae, Ozodochilus is near in shape but it bears a less marked ornament and a different kind of peristome; its columellar lip is convex and without an angulation at the parietal region, while Vacekia gen.n., has a vertical columellar lip, meeting in an angle with the base. The aperture is roundish in Ozo dochilus but transversally elongated in Vacekia . Microschisa (Pseudomelaniidae) is also similar, but it bears rounded periphery also on the juvenile whorls and an outer lip, much less prosocline than in Vacekia.
