Diagnoza

Porównanie

L. commutata is almost coeval and perhaps conspecific with the type species of the genus, Lochriea montanaensis Scott,1942. There is no significant difference between the apparatus structure of Polish populations from the late Visean of Czerna  and those from the Namurian of North America. L. cracoviensis (Bełka, 1985) seems to represent a population of the same lineage. The robust appearance of the P₁ elements, with strongly widened tips of the denticles, may be a feature of advanced ontogenetic stages and the difference in respect to other populations from Poland may be a matter of population dynamics. Adult specimens in American populations of L. commutala approach this morphology.

Autekologia

Występowanie geograficzne

Zasięg czasowy

Materiały muzealne

Literatura

Dzik, J. 1997. Emergence and succession of Carboniferous conodont and ammonoid communities in the Polish part of the Variscan sea. Acta Palaeontologica Polonica 42, 57-170.