Gattenpleura Weyer, 1976

Korn, Dieter & Weyer, Dieter, 2023, The ammonoids from the Gattendorfia Limestone of Oberrödinghausen (Early Carboniferous; Rhenish Mountains, Germany), European Journal of Taxonomy 882, pp. 1-230 : 150

Genus Gattenpleura Weyer, 1976

Type species

Gattenpleura bartzschi Weyer, 1976: 846 ; original designation.

Diagnosis

Genus of the Gattendorfiinae with a discoidal conch with low coiling rate (WER = 1.50–1.75); inner whorls subevolute or evolute, adult stage subinvolute to subevolute. Whorl profile with a depression on the inner flank, umbilical margin raised. Ornament with convex or slightly biconvex, rursiradiate growth lines, shell with or without constrictions. Some species with shallow radial riblets. Suture line with deep, lanceolate or narrowly V-shaped external lobe (as deep as the adventive lobe).

Genus composition

Gattenpleura bartzschi Weyer, 1976 ; Gattenpleura pfeifferi Weyer, 1976 ; Gattendorfia concava Vöhringer, 1960 .

Remarks

Gattenpleura was established by Weyer (1976) for forms that differ from Gattendorfia in two characters, namely the dorsolateral groove and the presence of riblet-like, splitting radial folds on the shell. Here, we change this original definition in such a way that the dorsolateral groove is regarded as a key distinguishing character from Gattendorfia and especially from Weyerella . This means that “ Gattendorfia concava ” is also assigned to Gattenpleura . Weyer (1976) had already pointed out the close relationship; according to this, “ Gattendorfia concava ” should be an almost direct ancestor of “ Gattendorfia molaris ”.