Costaclymenia muensteri (Ansted, 1838) from  the early P. jugosus Zone at Jabłonna, Ostrówka and Kowala in the Holy Cross Mountains.

Costaclymenia muensteri (Ansted, 1838); growth lines, sutures, septal geometry and outline of the shell.

Diagnoza

External whorl strongly compressed; inner whorl up to 15 mm diameter smooth, middle growth stage with weak ventrolateral riblets.

Porównanie

Ventral and umbonal lobes of the suture are shallow; juvenile conch bears subventral tubercles. C. limata Czarnocki, 1989  was created for the single large specimen from the red limestone of probable Clymenia Stufe strata at Ostrówka, referring to the completely smooth conch surface as the diagnostic character. Actually the conch shows indistinct tubercles, which usually disappear at the stage when the whorls increase their height . I find thus this evidence insufficient to define a separate species.

Autekologia

Występowanie geograficzne

Ostrówka and Jabłonna, coeval strata at Kowala.

Zasięg czasowy

Red limestone of the Clymenia beds and the earliest P. jugosus Zone. 

Materiały muzealne

ZPAL: 3 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.

Korn, D, Price, J.D., & Weyer, D. 2018. The genus Costaclymenia in Europe (Ammonoidea, Late Devonian). Neues Jahrbuch für geologie und Paläontologie, Abhandlungen 287, 249-260.