Diagnoza

Roundedly triangular conch outline.

Porównanie

S. paradoxa co-occurs with S. solarioides on the same bedding planes. There is also a great variation in the conch outline among triangular specimens found together, although the sample size is too small to enable reasonable statistics . The single more roundedly triangular specimen described  as  S. semiparadoxa by Schindewolf,1937 may belong to the same species as an extreme morphology. There seems to be, however, a bimodality in frequency distribution of conch morphologies covering ranges of S. solarioides and S. paradoxa; these thus seem to be biologically meaningful. Because the triangular or regularly spiral coiling starts from almost the beginning of the conch growth, it is unlikely that this is a case of sexual dimorphism.

Autekologia

Występowanie geograficzne

Dzikowiec.

Zasięg czasowy

Late P. jugosus Zone.  

Materiały muzealne

ZPAL: 10 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.