Diagnoza

Postero-lateral extremities auriculate to various degree, in some cases a broad and shallow U-shaped lateral indentation of the lateral margin being present in the posterior part; ventral valve convex in the umbonal region, otherwise weakly convex to flat or resupinate, with koskinoid perforations in the umbonal region; dorsal valve weakly to strongly convex; ventral interarea apsacline; dorsal interarea anacline, linear to lowly triangular; chilidium striate; ornamentation consisting of radial costae and costellae appearing by intercalation, first thin and low, then of the same thickness and height as the costae.

Porównanie

Schellwienella umbraculum minor Biernat, 1954 (Late Emsian of Grzegorzowice) lacks crenulated costellae and its dorsal interarea is virtually absent.

Autekologia

Występowanie geograficzne

Eifel Mts. (Germany), Skały (Holy Cross Mts., Poland), Belgium (Ardennes), Morocco (Qebel Issimouv, Anti-Atlas) and probably material from Myanmar, Czech Rep., Spain and Russia.

Zasięg czasowy

Mid Devonian, Mid Eifelian to Early Givetian.

Materiały muzealne

Material from Eifel Mts. (Germany), Skały - outcrop SK-3, Poland (ZPAL Bp VII/1307, 1308, 1310, 1311, 3700, 3704-3713; ZPAL Bp 48/17/3; L PZ-D.547-548, olim 757), Belgium (Ardennes), Morocco (Qebel Issimouv, Anti-Atlas). Probably also material from Myanmar, Czech Rep., Spain and Russia. 

Literatura

Biernat, G. 1954. Ramienionogi z eiflu Grzegorzowic. Brachiopods from the Couvinian of Grzegorzowice. Acta Geologica Polonica 4 (4): 485-533,

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.

Kayser, E. 1871. Die Brachiopoden des Mittel- und Ober-Devon der Eifel. Z. deutsch. geol. Ges. 23: 491-647, Plates 9-14; Berlin.

Schlotheim, E.F. von 1820. Die Petrefactenkunde auf ihrem jetzigen Standpunkte durch die Beschreibung seiner Sammlung versteinerter und fossiler Uberreste des Tier- und Pflanzenreichs der Vorwelt erlautert. LXII+ 437 pp., Pls. 15-39; Becker'sche Buchhandlung, Gotha.

Schlotheim, E.F. von 1822. Nachtrage zur Petrefactenkunde. Mit XXI Kupfertafeln. XI+ 100 pp.; Becker'sche Buchhandlung, Gotha.

Schnur, J. 1851. Die Brachiopoden aus dem Uebergangsgebirge der Eifel. Progr. verein. hoh. Biirg. u. Prov.-Gewerbeschule Trier, Schuljahr 1850-1851, 16 pp., Fr. Lintz; Trier.

Sobolew, D. 1909. Sredniy devon Kelecko-Sandomirskago Krah. Mat. geol. Ross. 24: 43-536, Plates 2-6; St. Petersburg, Moskva.