Diagnoza

Mature specimens reaching about 30 mm in diameter; suture with rounded deep lobe; evolute juvenile conch.

Porównanie

Suture has been traced only in two specimens and they differ significantly in shape of the flank lobe, subcircular in one, and parabolic in the other. I am thus skeptical regarding taxonomic value of this character in distinguishing species of the genus. In fact, data show that virtually all characters of the species are extremely variable, with possible exception of the apertural modifications. The specimen with well preserved shell  shows coarse growth lines characteristic of the species but most specimens from the Państwowy Instytut Geologiczny in Warsaw collection are devoid of the external shell layer.

Autekologia

Występowanie geograficzne

Ostrówka.

Zasięg czasowy

P. trachytera Zone.

Materiały muzealne

ZPAL: 15 specimens.

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.