Diagnoza

Shell very small to small (up to 6.3 mm in width), very strongly ventribiconvex to almost planoconvex, slightly transverse, with mucronate postero-lateral extensions; maximal width at hinge line, sometimes at midlength (in this case shell with a postero-lateral indentation anterior to short mucrons), maximal thickness at hinge line; cardinal margin nearly straight; dorsal valve semielliptic, weakly convex to nearly flat, with rather broad and shallow sinus with flat bottom; dorsal interarea low, anacline, notothyrium open; ventral valve pyramidal and ventral interarea nearly flat to moderately concave, very high, triangular, apsacline to nearly catacline, transversely striated; ornamentation consisting of radial costellae, originating in the umbonal region, separated by wider or narrower furrows, 8-10 on each lateral flank.

Porównanie

Genus Skenidium have an procline ventral interarea, cardinal process not continuous with dorsal median septum and a dorsal interarea vestigial.

Autekologia

Występowanie geograficzne

Łysogóry Region, Poland; reported also from Karczówka and Kielce in Poland (see Siemiradzki, 1922b), Inner Mongolia (Nei Monggol) in China (Zhang, 1985) and Morocco (Drot 1961, 1975).

Zasięg czasowy

Upper Eifelian (outcrop SK-3) to Givetian (outcrop SW-2)

Materiały muzealne

78 specimens from outcrop SK-3 (ZPAL Bp. IV) and 60 articulated shells from outcrop SW-2 (ZPAL Bp 48/27/1)

Literatura

Drot, J. 1961. Quelques formes de Brachiopodes givetiens du Draa (Maroc presaharien) peu communes en Afrique du Nord. Notes Serv. geol. Maroc 20: 59-68, pl. 1; Rabat.

Drot, J. 1975. Orthida (Brachiopodes) du Maroc presaharien. I. Orthidina. II. Dalmanellidina du Devonien inferieur a l'exclusion du genre Schizophoria. Ann. Paleont. (Invert.) 61 (1): 45-99, pls 1-8; Paris.

Gürich, G. 1896. Das Palaeozoicum im polnischen Mittelgebirge. Verh. Russ.-Kais. Min. Ges. St.-Petersb. (2) 32: 1-539, pls, 1-15, map; St-Petersburg.

Halamski, A.T. 2009. Middle Devonian Brachiopods from the northern Part of the Holy Cross Mountains, Poland in relation to selected coeval faunas. Part One: Introduction, Lingulida, Craniida, Strophomenida, Productida, Protorthida, Orthida. Palaeontographica Abteilung A, 287: 41-98.

Siemiradzki, J. 1922b. Katalog systematyczny zbiorów paleontologicznych Muzeum im. Dzieduszyckich we Lwowie. Ramionoplawy (Brachiopoda). Catalogue systemathique des brachiopodes fossiles du Musee Dzieduszycki a Lwów (Pologne). Rozpr. Wiad. Muz. Dziedusz. 5-6: 151-182 (1-28); Lwów.

Zhang, Y. 1985. Early Middle Devonian (Eifelian) Brachiopods from Zhusilenghaierhan region, Western Nei Monggol. Acta Palaeontologica Sinica 24 (2): 243-258, pls 1-3; Nanking.