Diagnoza

Relatively wide and short platform of P₁ elements, underived appearance of A-shaped M elements.

Porównanie

Wide platform makes it different from the succeeding K. triangularis, but this character is size-dependent.

Autekologia

The origin of the lineage remains cryptic; presumably it represents an exotic open-sea and cold-water element that earlier inhabited Frasnian higher latitudes.

Występowanie geograficzne

Worldwide in the Late Devonian tropics.

Zasięg czasowy

Latest Frasnian P. linguiformis Zone and the earliest part of the Famennnian.

Materiały muzealne

ZPAL

Literatura