Diagnoza

thinly pachyconic shell at 15 mm Dm (Wb/Dm = 0.60-0.70), thick-disc-shaped shell at 30 mm (Wb/Dm = 0.45-0.55) and disc-shaped shell at 60 mm ( Wb/Dm = 0.40-0.50); sharpening of the external side in the middle growth stage; in old age with a clear keel; umbilicus moderately wide (Nw/Dm = 0.20–0.26 between 10 and 60 mm Dm);  umbilical edge is rounded when young, and from around 15 mm in diameter a clear umbilical edge forms; ornamentation at 30 mm diameter with weak short knots on the edge of the umbilicus, bundled crenulated and clearly biconvex growth stripes and fine spiral stripes; lobe line in the youth with parallel-walled external lobe; in old age the external lobe is V-shaped.

Porównanie

similar to Agastrioceras clathratum KORN, 1997, but even in old age the navel edge is covered with ribs and rounded external side over 40 mm in diameter

Autekologia

Występowanie geograficzne

Southwest Portugal, Spanish Pyrenees, Belgium (Liège, Hainaut), Netherlands, Great Britain (Cheshire,), Ireland (Clare and Limerick County), Germany (Rhenish Slate Mts.), Poland (Lublin Coal Basin), Uzbekistan (Karachatyr Mts., Sangruntau Mt.) and China (Guangxi, Ningxia)

Zasięg czasowy

Carboniferous, Bashkirian (Arnsbergian-Kinderscoutian)

Materiały muzealne

Literatura

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

Hind, W. 1905. Notes on the homotaxial equivalents of the beds which immediately succeed the Carboniferous Limestone in the west of Ireland. Proceedings of the Royal Irish Academy section B 25 : 93-116.

Korejwo, K. & Teller, L. 1967. Some horizons of Upper Carboniferous goniatites of the Lublin Basin. Bulletin de l’ Academie Polonaise des Sciences. Serie des Sciences geologiques et  geographiques 15 (4): 207-209.

Korejwo, K. & Teller, L. 1968. Stratygrafia karbonu zachodniej części niecki lubelskiej. Acta Geologica Polonica 18 (1): 153-177.

Korejwo, K. & Teller, L. 1971. Karbon struktury Dęblina. Acta Geologica Polonica 21 (2): 213-239.

Korn, D.  2007. Goniatiten von der Namur/Westfal-Grenze im Rheinischen Schiefergebirge (Cephalopoda, Ammonoidea; Oberkarbon. Deutschland Geologie und Paläontologie in Westfalen, Heft 69: 5-45

Musiał, Ł. & Tabor, M. 1988. Stratygrafia karbonu na podstawie makrofauny. In. Z. Dembowski & J. Porzycki (eds.), Karbon Lubelskiego Zagłębia Węglowego. Prace Instytutu Geologicznego 122: 88-111.