Gatunek typowy
Acontiodus (Semiacontiodus) nogamii Miller, 1969.

Opis

Apparatus weakly differentiated, elements with relatively shallow basal cavities. The symmetric element robust, with strong lateral ridges; asymmetric elements with more or less oval cross sections of their cusps, bearing distally oblique ridges along their inner side.

Synonimy
Staufferella Sweet, Thompson & Satterfield, 1975 is a generic name commonly used for Late Ordovician species of the same group. Its type species differs from older ones in having incisions at the base of lateral ribs in the tr elements.

Zasięg czasowy

Literatura

Dzik, J. 1994. Conodonts of the Mójcza Limestone. In: J. Dzik, E. Olempska, & A. Pisera. Ordovician carbonate platform of the Holy Cross Mountains. Palaeontologia Polonica 53, 43-128. 

Löfgren, A. 1999a. The Ordovician conodont Semiacontiodus cornuformis (Sergeeva, 1963) and related species in Baltoscandia. Geologica et Palaeontologica 33, 71–91.