Diagnoza

The whorls early increase in width in the ontogeny and strongly embrace each other; between 10 and 30 mm the form is more narrowly umbilicated than in other species, the umbilicus size decreases to 1/3 diameter; above 30 mm, the relative umbilical width increases sharply, so that the largest senile whorls are very widely umbilicated.

Porównanie

The whorl cross-section of the adult form is semicircular as in Gastrioceras rurae  only the umbilical wall is more oblique and the umbilical edge is more rounded.

Autekologia

Występowanie geograficzne

Great Britain (Lancashire, Cornwall), Ireland (Kilkenny Co.), Netherlands, Germany (Rhenish slate Mts.), Poland (Lublin Coal Basin)

Zasięg czasowy

Carboniferous, Bashkirian (Yeadonian – Duckmantian)

Materiały muzealne

Literatura

Bojkowski, K. 1979. Goniatyty z karbonu Górnośląskiego i Lubelskiego Zagłębia Węglowego. Biuletyn Instytutu Geologicznego 311: 5-68.

Dzik, J. 1997. Emergence and succession of Carboniferous conodont and ammonoid communities in the Polish part of the Variscan sea. Acta Palaeontologica Polonica 42, 57-170.

Foord, A.H. 1903 . Monograph of the Carboniferous Cephalopoda of Ireland, Part V, Containing the families Glyphioceratidae (concluded) and  Prolecanitidae, with title-page and index. Palaeontolographical Society Monograph 57: 147-234,

Schmidt, H. 1925. Die carbonischen Goniatiten Deutschlands. Jahrbuch der Preußischen Geologischen Landesanstalt 45 (for 1924): 489-609.