Diagnoza

Thickly lenticular conch widest near the closed umbilicus; suture line with rounded prongs of the ventral lobe, narrow ventrolateral saddle, and broadly rounded adventive lobe.

Porównanie

A. lacerus has a slightly denticulated external lobe, even at smaller diameter, ventrolateral saddle is wider and more symmetrical ; A. deansi Ramsbottom, 1970 has a denticulate adventive lobe.

Autekologia

Występowanie geograficzne

Germany (Rhenish Massif), Belgium (Namur and Liege), the Netherlands, Great Britain (Wales), Southwestern Portugal (Quebradas Formation, G1 Zone),  Poland (Lublin Coal Basin), Algeria (Kenadza region) and Morocco (Tafilalt)

Zasięg czasowy

Carboniferous; Moscovian (Late Namurian zones: R2c and G1)

Materiały muzealne

Literatura

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.

Korn, D. 1997. The Palaeozoic ammonoids of the South Portuguese Zone. Memórias do Instituto geológico e Mineiro 33: 1-131, 69 text-figs., 16 pls., Lisboa.

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.