Opis

Remarks. — The tornoceratine goniatites inherited a low conch expansion rate after their anarcestine ancestors. The conchs are generally involute with the area of the septum on both sides of the preceding whorl vaulted in the dorso-ventral plane.
Much value is given to the profile of aperture in the tornoceratine goniatites and an elaborate terminology for various shapes of growth lines and ribs is available. To make the text comprehensible also to non-specialists I avoid such terms and refer only to prominence of ventrolateral protrusions of the aperture (auricles) and depth of the ventral infundibular sinus. Schematic drawings of growth lines offer enough information on their exact course. Also while describing sutures possibly neutral descriptives are used in hope that this will be understandable to followers of various notation systems. 

Synonimy

Zasięg czasowy

Literatura

Dzik, J. 2006. The Famennian "Golden Age" of conodonts and ammonoids in the Polish part of the Variscan sea. Palaeontologia Polonica 63, 1-359.