Szekessy Vilmos (szerk.): A Magyar Természettudományi Múzeum évkönyve 54. (Budapest 1962)

Rásky, K.: Tertiary plant remains from Hungary (Upper Eocene and Middle Oligocene)

width 0,35 cm medially. Wings elongated, slightly broadening above median lien, apically blunt, rounded. A fine venation visible on wings. No definite midrib, though sometimes a suggestion of it. Veins rather parallel, slightly divergent toward apex of wing, extending to their margins. Wings not connate basally. Remarks : the fruit remain found in the Upper Eocene Buda marl formation is sufficiently comparable with the remains of Heterocalyx ungeri described by SAPORTA (1873, p. Ill, PI. 16, Figs. 19-26). On SAPORTA'S finds, from the Middle Oligocène flora in Aix, the calyces consist of two, three, four and five sepals, some of which are connected with a slender stalk. On SAPORTA'S figures, the fruit is above, the calyx composed of narrower and broader sepals, all sepals having three midribs. The Heterocalyx ungeri SAP. find differs from the remain of Abelia quadrialata REID & CHANDLER, already described from the Buda marl (RÁSKY 1960); in this latter the sepals are basally connate. On the other hand, SAPORTA'S Heterocalyx ungeri specimens from France (Aix) differ, by reason of the three midribs of the wings, both from the Hungarian Abelia quadrialata and Heterocalyx ungeri finds, in which latter the parallel veins predominate. On REID & CHANDLER'S Abelia quadrialata specimens (Bembridge flora, REID & CHANDLER 1926, p. 133, Pt. 8, Figs. 29 — 31; Text-Fig. 11), also a parallel venation is visible. In turn, the wings display three midribs on BEID á CHANDLER'S species Abelia trialata (Bembridge flora). In spite of the parallel state of the venation of the wings, the fruit remnant found in the Buda marl provisionally remains in the genus Heterocalyx. Comparison with recent species: SAPORTA compared the species Heterocalyx ungeri with the recent Astronium taxa, relegating the fossil remains to the family Anacardiaceae. The Astronium species live today in the tropical and subtropical areas of South America. ELAEOCARPACEAE Sloaneaeearpum eocenicum n. gen., n. sp. (Plate II, Figs. 1-3) Derivation of generic n am e : from the name of the recent genus Sloanea. Derivation of specific name: from the geological formation in which it occurs. Holotype : the fruit shown on Plate II, Fig. 1, and its counterpart on Plate II, Fig. 3. Paleobotanical Collection of the Rotanical Department of the Hungarian Natural History Museum; Collect, nr. 62.63. 1. and Fig. 3 nr. 62. 64. 1. Type locality: Rudapest-Óbuda, the former Nagybátony-Üjlak brick-yard. Type stratum : marl formation, Upper Eocene. Materials : impression of 1 fruit, the holotype and the counterpart. Diagnosis gen. et sp.: An ovoid fruit. Length 2,0 cm, width 1,5 cm. Remnant of curved pedicel about 2 cm long. Upper portion of pedicel comparatively thick, its width almost 0,3 cm. Whole surface of fruit covered with comparatively long, thin, very fine and very densely spaced spines. Spines straight, linear, hard, rigid, their tips (apices) nowhere hooked. Greatest measurable length of spines 1,2 cm, but also longer could have existed. Surface of fruit, where spines fell of

, broke away, or are missing, covered with small protuberances and emergencies. Fruit probably dry or slightly woody. Remarks : There are some spine-like emergencies on the fruit remain of Castanea ungeri HEER described from North Greenland (HEER 1859, p. 470, Tab.