Diagnoza

Pachyconic shell at 15 mm diameter, casing thick disc-shaped at 30 mm with narrow to moderately wide umbilicus; umbilical edge faintly wrinkled, flanks and external side broad rounded; ornamentation at 30 mm diameter with weak, short knots on the edge of the umbilicus, bundled crenulated growth lines and strong spiral lines; lobe line with wide external lobe of the adventitious lobe) and moderately high median saddle.

Porównanie

Cancelloceras crenulatum (Bisat, 1924) has a broader shell with a wider umbilicus; Agastrioceras carinatum (Frech, 1899) shows a very similar ornamentation but in the middle growth stage has a sharpened external side.

Autekologia

Występowanie geograficzne

Great Britain (Lancashire and Yorkshire in England, Pembrokeshire in Wales), Portugal, Belgium (Hainaut, Liège), Netherlands, Germany (Rhenish slate Mts.), Poland (Lublin Coal Basin), Ukraine (Donets Basin) and Algeria (Atlas)

Zasięg czasowy

Carboniferous, Moscovian; in Poland only marine horizon of Namurian C

Materiały muzealne

Literatura

Bisat, W.S. 1923. Gastrioceras cancellatum (sp. nov.) at Meanwood, Leeds. Transactions of the Leeds Geological Association 19: 47-50.

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.

Korejwo, K. 1969. Stratigraphy and palaeogeography of the Namurian in the Polish Lowland. Acta Geologica Polonica 19 (4): 609–709.

Korejwo, K. 1986. Biostratigraphy of the Carboniferous deposits of the Świdnik blocks (Lublin Coal Basin). Acta Geologica Polonica 36 (4): 337–346.

Ramsbottom, W.H.C & Calver, M.A. 1962. Some marine horizons containing Gastrioceras in North West Europe. Quatrième Congrès International de Stratigraphie et de Géologie du Carbonifère, Heerlen 1958, Compte Rendu 3: 571-576.