Vörös A. szerk.: Fragmenta Mineralogica Et Palaentologica 14. 1989. (Budapest, 1989)

FRAGMENTA MINERALOGICA ET PALAEONTOLOGICA 14. BUDAPEST, 1989 p. 29-40 A revision of the Jurassic gastropod fauna from Cape San Vigilio (S-Alps, Italy), published by M. Vacek (1886) By M. A. CONTI and J. SZABÓ (Received December 23, 1988) Abstract: This taxonomic revision is based on VACEK's originals, deposited in the Geologische Bundesanstalt in Vienna. One of the species represents a new genus, Vacekia (Trochidae), designed here and definitions are given for two new species which have been misidentified: Bathrotomaria submandokii sp.n. (instead of Pleurotomaria subdecorata) and Neritopsis dumortieri sp.n. (instead of Neritopsis spinosa). Almost all the other names needed some correction, too. INTRODUCTION This systematical revision was made in the frame of a general reexamination to update the old Tethyan Jurassic gastropod faunistic sources for paleoecological, paleobiogeographical and stratigraphical evaluation. VACEK's fauna, found in the so-called "Oolite di S. Vigilio", is an especially important one because it is partially filling the gaps of knowledge between the relatively well-known Hettangian - Pliensbachian and Bajocian gastropod fauna of the Tethyan region. The gastropods constitute only a small part of the enormous amount of fossils found in the same outcrop and discussed by VACEK (1886) in his monograph. Other gastropod collections from the locality were also studied by MENEGHINT (1879), de GREGORIO (1886), FUCINI (1892) and GIOLI (1887, 1888). Recently, the originals of the latter authors have not been available but they are planned to be studied as soon as it becomes possible; so this paper is only the first step toward a complete revision. Unfortunately, VACEK's non-figured material has also been lost. Acknowledgements : The authors are indebted to Dr. Franz STOJASPAL (Geologische Bundesanstalt, Dep. Palaeontology), helping realisation of this revision with the loan of VACEK's originals. The dimensions are given in millimetres. Please, consider that sometimes the measurements are taken on slightly damaged shell portions. The following shortenings are used: H= total height of shell; HL= height of last whorl; HA= height of aperture; D= diameter of shell; W= width of aperture; A= apical (spiral) angle, consisting of two numbers in case of coeloconical and cyrtoconical forms, the first one measured on apex the second one on the last whorl; L= length of patelliform shell (in anterior - posterior direction).