Kaszab Zoltán (szerk.): A Magyar Természettudományi Múzeum évkönyve 75. (Budapest 1983)

Vörös, A.: Some new genera of Brachiopoda from the Mediterranean Jurassic

socket ridges are high and lean over the sockets. The crura are similar to the falcifer type. The loop is very long, attaining almost the anterior margin. The descending branches are straight and divergent, the ascending branches are wide and convergent, connected by a wide arched transverse band. Species: S. partschi (OPPEL) (1861, p. 538, pl. X, fig. 6a-c). — S. hierlatzica (OPPEL) (1861, p. 539). — S. securiformis (GEMMELLARO) (1874, p. 66, pl. X, fig. lOa-c, 11). Discussion : Several "axiniform" zeilleriid species are known from the Mediterranean Lower Jurassic. The above three are selected to belong to Securina on the basis of their straight lateral commissures. Some other species, very similar in general form (e.g. "Waldheimia pomatoides Di STEFANO, "W" oxygonia UHLIG), have strongly bent lateral commissures running along the beak ridges of the brachial valves. This means that the planareas fall completely to the pedicle valves and this regarded as a character of generic value. The only Mesozoic zeilleriid genus showing apparent similarity to Securina is the Bathonian — Callovian Digonella. This NW-European form is however separated from Securina by the time-gap and by some morphological differences; notably, Digonella has a much longer septalium and does not possess the strongly falciform crura. Distribution : Sinemurian and Pliensbachian of the Mediterranean Region (Betic Cordilleras, Saharian Atlas, Sicily, Appennines. Southern Alps, Northern Limestone Alps, West Carpathians. Hungary). References AGER, D. V. (1965): Mesozoic and Cenozoic Rhynchonellacea. — In: MOORE, R. C. (ed.): Treatise on Invertebrate Paleontology. Part H.: Brachiopoda.: H597-H625. AGER. D. V. (1956-67): A Monograph of the British Liassic Rhynchonellidae. : i-xxvi + 1-50. (1956). 51-84. (1959), 85-136. (1962), 137-172. (1967), Palaeontogr. soc. London. AGER, D. V. (1967): Some Mesozoic brachiopods in the Tethys region. — Syst. Assoc. PubL, No.7r 135-151. AGER, D. V.. CHILDS, A. & PEARSON, D. A. B. (1972) : The evolution of the Mesozoic Rhynchonellida. — Geobios, 5 (2-3): 157-235. BABANOVA, L. I. (1964): New data on the Jurassic brachiopods. — Paleont. Zhurn., 1964 (1): 63-70. (In Russian) BAKER. P. G. (1972): The development of the loop in the Jurassic brachiopod Zeilleria leckenbyi. — Palaeontology. 15 (3): 450-472. BENIGNI, C. (1978): Revisione tassonomica dei Rhynchonellida liassici di Ra Stua (Belluno) e Fanes (Bolzano). — Riv. Ital. Paleont.. 84 (1): 121-168. BÖSE, E. (1898): Die mittelliassische Brachiopodenfauna der östlichen Nordalpen. Nebst einem Anhange über die Fauna des unteren Dogger in bayerischen Innthale. — Palaeontographica. 44: 145-236. BÖSE, E. & SCHLOSSER, M. (1900): Über die mittelliassische Brachiopodenfauna von Südtyrol. — Palaeontographica. 46: 175-212. BUCKMAN. S. S. (1918): The Brachiopoda of the Namyau Beds, Northern Shan States, Burma. — Palaeont. Indica, (N. S.), 3 (2): 1-299. CANAVARI, M. (1880): I brachiopodi degli Strati a Terebratula Aspasia Mgh. nell'Appennino Centrale. — Atti R. Accad. Lincei (3) Mem. Cl. Sei. Fis. Mat. Nat., 8: 329-360. CANAVARI, M. (1883): Contribuzione 111 alia conoscenza dei brachiopodi degli Strati a Terebratula Aspasia Mgh. nell'Appennino Centrale. — Atti Soc. tose. Sei. nat., Mem.. 6 (1): 70-110. COOPER. G. A. & GRANT, R. E. (1976): Permian brachiopods of West Texas. V. — Smiths. Contr. Paleobioi. 24: 2609-3159. DAGYS, A. S. (1963): Upper Triassic brachiopods of the southern USSR. — Moscow, p. 1-248. (In Russian) DAGYS, A. S. (1974): Triassic brachiopods (Morphology, classification, phylogeny. stratigraphical significance and biogeography). — Novosibirsk, p. 1-385. (In Russian) DELANCE, J.-H. (1974): Zeilleridés du Lias d'Europe occidentale (Brachiopodes). — Mém. Géol. Univ. Lyon. 2: 1-406. DIENI, I. & MIDDLEMISS. F. A. (1981): Pygopid brachiopods from the Venetian Alps. — Bolt. Soc. Paleont. Ital., 20 (1): 19-48.