Vörös A. szerk.: Fragmenta Mineralogica Et Palaentologica 15. 1992. (Budapest, 1992)

The specimens of G. bakonicus strongly differ from G. sp. and gammarocrinitid indet. found also in the same outcrop in the presence of the characteristic interradial lobes and in the smaller dimension of the cup. Gammarocrinites sp. <P1. II, Fig. 1; Text-fig. 5 1979 Sclerocrinus sp. - Pisera and Dzik, p. 813, fig. 5 g; pi. 3 fig. 5 1987 Sclerocrinus sp. - Gluchowski, p. 27, pi. 7 fig. 1. Description: Small but high oblique cup, circular in outline, with heterometric RR. External surface covered by very small grains. Sutures between radiais clearly visible. Interradial projections very low. Radial plates stout with wide upper articular facet. Radial facets subvertical, characterized by crescent-shaped aboral and subrectangular adorai surface. Aboral surface characterized by a wide ligament fossa with a deep and very small ligament pit. Adorai surface possessing two flat subrectangular interarticular fossae and two smaller subhorizontal circular muscular fossae separated by a radial groove. Aboral and adorai surfaces separated by a fulcral ridge with axial canal. Ventral cavity deep and small, circular in outline. Dorsal side circular in outline, characterized by five interradial lobes and by a shallow and wide dorsal cavity. Each lobe is deeply furrowed by a suture between two RR. Remarks: The cups illustrated by Pisera and Dzik (1979, fig. 5; pl. Ill, fig. 5) and Gluchowski (1987, pl. VII, fig. 1) as Sclerocrinus sp. are very similar to our specimens but slightly more lobate and more markedly pentagonal in outline. Textfig. 5 - Gammarocrinites sp, reconstruction of a cup (x 10). a, dorsal view; b, lateral view; c, ventral view The single, although reasonably well preserved specimen precludes a full description and specific identification. Nevertheless its morphology is typical for the Late Jurassic gammarocrinitids but different from any known species. Further material will enable us to describe it as a new species.