Diagnoza

Shell with a narrow apical angle with a decentric narrow siphuncle, probably orthochoanitic; septa correspond to the low transverse ribs set approximately 2-3 mm apart; intercostal areas are covered with 9-14 distinct transverse striae, slightly wavy in places.

Porównanie

Differs from Brachycycloceras scalare mainly by the much lower expansion rate of the conch and also by less prominent, slightly sinuous annuli; less dense transverse striae.

Autekologia

Poland (Gałęzice, Zagłębie Dolnośląskie; boreholes: Husynne, Kosmów, Krasnystaw, Niedrzwica 2, Zagłębie Lubelskie), Belgium, Scotland.

Występowanie geograficzne

Carboniferous; Visean-Namurian

Zasięg czasowy

Materiały muzealne

Literatura

Żakowa, H. 1971. Poziom Goniatites granosus w synklinie galęzickiej (Góry Świętokrzyskie). Prace lnstytutu Geologicznego 60: 1-137