Diagnoza

Very characteristic elements of the symmetry fransition series of this species, with strongly recurved ventral branches and short dorsal ones can be traced in virtually all Dzikowiec samples. There are some difficulties in matching them with other elements, but at least in the case of oz elements this can be done on the basis of some morphologic similarities. Quite numerous and very variable oz elements with strongly recurved ventral branches are invariably associated with those of the s1'rnmetry transition series. Some ne element with wide processes and long denticles may belong to the species. The crucial point is, however, the identity of the sp element. No platform element type can be correlated with this set of ramiforms on the basis of its distribution in the section. Among associated 'spathognathoduses' the only one that shows distribution along the sections and morphology consistent with that of the discussed ramiforms, is that with a gently arched blade.

The restored apparatus organisation resembles Cudotaxis priceslingi Charff, 198 1 from the late Toumaisian and earliest Vis6an (Chauff 1981). In the Muhua section, above the range of occurrence of this species, another related form occurs that bears some similarity to later species of Synprioniodina. Perhaps all these genera belong to a single evolutionary branch.

Porównanie

Autekologia

Występowanie geograficzne

Zasięg czasowy

Materiały muzealne

Literatura