Genus Acrospirifer Helmbrecht & Wedekind, 1923

Type species: Spirifer primaeva Steininger, 1853 .

Stratigraphic distribution: Pragian to Emsian (middle to upper Lower Devonian). Geographic distribution: Europe.

MIN 0001777.1-2

Acrospirifer primaevus (Steininger, 1853)

Locality: Kollenbacher Stollen, Siegen, Siegerland, Germany Stratigraphy: Taunusquarzit Formation, Pragian, middle Lower Devonian