Protopanderodus liripipus Kennedy, Barnes & Uyeno, 1979 from the Mójcza Limestone.

Diagnoza

Bases of the elements elongated into internal and external flat processes of parabolic shape.

Porównanie

The species differs from its ancestor P. varicostatus in a further development of wings at the element bases and from its successor P. insculptus in the lack of a denticle on the inner of these wings . Juvenile specimens do not show diagnostic features of the species, being similar to P. gradatus in their general shape except for a very deep cavity within a funnel-shaped base. The wings develop
gradually during grow th of the element. Also the shape of the cusp changes somewhat, in mature specimens being almost straight, which gives specimens the characteristic triangular appearance .

The population described by NOWLAN ( 1981) is less advanced in the development of external processes while the specime ns illustrated by HARRIS et al. ( 1979) seem to be more advanced in the same respect , being on the way to P. insculptus.

Autekologia

Występowanie geograficzne

ójcza, Zalesie, Miedzygórz.

Zasięg czasowy

According to MCCRACKEN ( 1989) the species ranges from the P. gerdae Subzone
of the A. tvaerensis Zone to the A. ordovicicu s Zone. In Mójcza it occurs in the marly limestone of the Za1esie Formation (A . ordovicicus Zone), being common also in coeval strata in Międzygórz and Zalesie.

Materiały muzealne

Literatura

Dzik, J. 1994a Conodonts of the Mójcza Limestone. In: J. Dzik, E. Olempska, & A. Pisera. Ordovician carbonate platform of the Holy Cross Mountains. Palaeontologia Polonica 53, 43-128.