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

Protopanderodus liripipus Kennedy, Barnes & Uyeno, 1979 - M and S₀ elements

Diagnoza

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

Synonims:

Protopanderodus insculptus (BRANSON er MEHL); DZIK,1976; Protopanderodus liripipus sp. n.; KENNEDYet  al., 1979;Protopanderodus liripipus KENNEDY et al.; AN et al.,1979; Protopanderodus liripipus (KENNEDY et al .).1979; Protopanderodus liripipus KENNEDY et al .; BURRETT et al., 1983: Protopanderodus cf. P. liripipus KENNEDY et al.; OWLAN, 1983; Protopanderodus liripipus KENEDY et al.; WANG and Luo, 1984; Protopanderodus liripipus KENNEDY et al.; CHEN and ZHANG, 1984;. Protopanderodus liripipus KENNEDY et al.; BERGSTROM and ORCHARD, 1985.

Porównanie

The species differs from its ancestor P. varicostatus in a furth er 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 fo ravery deep cavity within a funnel-shaped base. The wings develop
gradually during growth 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 specimens 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

Zasięg czasowy

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