Typ MOLLUSCA » Podtyp CONCHIFERA » Gromada CEPHALOPODA » Podgromada AMMONOIDEA » Rząd Goniatitida » Podrząd Goniatitina »
Rodzina Girtyoceratidae Wedekind, 1918
Opis Shell discoidal and oxyconic, umbilicus closing during ontogeny; ornament with biconvex growth lines; suture line with V-shaped external lobe and rounded ventrolateral saddle; adventive lobe V-shaped with slightly sinuous flanks. Synonimy Zasięg czasowy Carboniferous; Tournaisian-Bashkirian Literatura Wedekind, R. 1918. Die Genera der Palaeoammonoidea (Goniatiten). (Mit Ausschluß der Mimoceratidae, Glyphioceratidae und Prolecanitidae). Palaeontographica 62: 85-184. |
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