Diagnoza

The elements sp with the inner lobe of the anterior process approximately two times longer than the remaining lobe; the anterior process in dextral oz element shorter than the remaining ones.

Synonims:

cf. Prioniodus sp.; SPASSOV and TELLER, 1963; cf. Prioniodus mojczensis sp. nov.; SPASSOV and TELLER, 1963; cf. Ambalodus sp.; SPASSOV and TELLER, 1963;
 Eoplacognathus zgierzensis sp. n.; DZIK, 1976;  partim Amorphognathus variabilis SERGEEVA; DZIK, 1976;  Eoplacognathus? variabilis (SERGEEVA); LOFGREN, 1978.

Porównanie

This is the oldest species of the genus, different from its predecessor Lenodus variabilis solely in an elongation of the inner lobe of the anterior process (the diagnostic feature of Eoplacognathus ) and in a denticulated internal process in the ne element. Its success or, E. pseudoplanus (VIlRA, 1974 ), has the inner lobe of the anterior process elongated even further, to a degree
typical for most species of the genus, while the elongation of the anterior process in the oz elements starts from still younger E. suecicus BERGSTROM, 1971 .
The degree of development in denticulation of the ne elements vary rather randomly among samples. This , together with a generally incomplete preservation of the sp elements, hampers any biometrical study, thus not allowing clarification of the relationship with Lenodus, which precedes the species stratigraphically in Mójcza and the Baltic sections.

Autekologia

Występowanie geograficzne

Mójcza.

Zasięg czasowy

In Mójcza the species appears 0.5 m below the discontinuity (sample MA-127),
where it cooccurs with Sagittodontina kielcensis. The transition to E. pseudoplanus cannot be traced in Mójcza because it corresponds to the hiatus, which covers also the range of E. pseudoplanus, E.suecicus, at least partially E. foliaceus, and probably a major part of the range of E. reclinatus .

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.