Eremiproetus, RICHTER et RICHTER, 1919

Budil, Petr & Mergl, Michal, 2019, Trilobite Assemblage Of Calceola - Bearing Beds In Acanthopyge Limestone (Choteč Formation, Middle Devonian, Eifelian, Prague Basin, The Czech Republic), Fossil Imprint 75 (1), pp. 79-91 : 85

Eremiproetus ? sp.

Text-fig. 3o

M a t e r i a l. One incomplete juvenile cranidium, internal mould and its counterpart.

R e m a r k s. This incomplete juvenile cranidium is very poorly preserved, both the internal mould and its counterpart. It is barely determinable, because all details are effaced by re-crystallization. Only preliminary affiliation to the Eremiproetus is possible, based on overall (slightly violinshaped) outline of glabella and, especially, the course of the preocular facial suture, diverging slightly anteriorly. The medium-vaulted frontal border is less arched and narrower than in E. eremita ( BARRANDE, 1852) . An indistinct median tubercle is present on the anterior part of the occipital lobe. On much of the fragmentary internal mould, indistinct coarse granulation on the surface of the glabella is present. Fragment of the cranidium, possibly because of its heavy corrosion, is somewhat reminiscent of the invalid species E. hornyi PŘIBYL, 1965 (established on corroded specimen, encompassed by Šnajdr (1977, 1980) into the synonymy of E. eremita ), and by some features, especially by narrower and less vaulted anterior border and glabellar granulation, also reminiscent of E. notabilis (G. ALBERTI, 1966) sensu Feist and Belka (2018 : text-fig. 3R, S). Due to some of abovediscussed characters, the cranidium is also reminiscent of cornuproetid Tafilaltaspis G. ALBERTI, 1966 which, however, has not yet been described from the Acanthopyge Limestone , but is known from underlying Suchomasty Limestone facies, upper Emsian in age. From Nagaproetus ŠNAJDR, 1977 , a fragment of the cranidium differs by a diverging preocular branch of the facial suture, and from Proetopeltis PŘIBYL, 1965 and Buchiproetus PILLET, 1969 , by the outline of the cranidium and the shape of the frontal border.