Diagnoza

Shell thick disc-shaped, umbilicus narrow; ornamentation with 48-56 spiral ridges and very fine, almost straight growth lines; there are 2 to 5 constrictions, mostly arranged regularly; flanks of the external lobe almost parallel; the median saddle reaches 25% of the height of the asymmetric ventrolateral saddle.

Porównanie

American Lusitanites newsomi (Smith, 1903) is more densely ribbed; only Lyrogoniatites tener and L. liethensis have more than 50 spiral stripes, but L. tener is narrower and L. liethensis wider; the shape of L. eisenbergensis is intermediate. L. newsomi (Smith, 1903) described by Żakowa, 1971 is L. eisenbergensis.

Autekologia

Występowanie geograficzne

Germany (Hohenlimburg, Rhenish Slate Mts., Harz Mts.), USA (Caney Shale, Moorefield shale etc.), Great Britain, northern Africa, northern Spain, Belgium, NW Kazakhstan, Poland (Gałęzice).

Zasięg czasowy

Carboniferous; Serpukhovian

Materiały muzealne

3 specimens from Gałęzice (Żakowa, 1971).

Literatura

Korn, D. 1988. Die Goniatiten des Kulmplattenkalkes (Cephalopoda, Ammonoidea; Unterkarbon; Rheinisches Schiefergebirge). Geologie und Palåontologie in Westfalen 11: 1–293.

Ruprecht, L. 1937. Die Biostratigraphie des obersten Kulm im Sauerland. Jahrbuch der Preussischen Geologischen Landesanstalt 57 (for 1936): 238-283.

Smith, J. P. 1903. The Carboniferous ammonoids of America. U.S. Geological Survey Monograph 42: 1-211.

Żakowa, H. 1971. Poziom Goniatites granosus w synklinie galęzickiej (Góry Swiętokrzyskie). Prace lnstytutu Geologicznego 60: 1-137.