Scabriscutellum sp.

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 : 83

Scabriscutellum sp.

Text-fig. 4d

M a t e r i a l. One fragment of pygidium, internal mould;

(?) minute fragment of cranidium.

R e m a r k s. One fragment of scutelluid pygidium possesses typically narrow ribs and wide inter-rib furrows, but lacks the pygidial marginal spines (pygidial posterolateral margin is smooth). It corresponds to the Scabriscutellum (Scabriscutellum) and/or Scabriscutellum (Cavetia) PILLET, 1973 . As no other material is available, the specimen is left in open nomenclature. It is, however, most probable that the specimen belongs to the S. (S.) caelebs caelebs ( BARRANDE, 1852), known from the Acanthopyge Limestone (see Vaněk and Valíček 2002 but not Šnajdr 1960 and Chlupáč 1983 – these authors affiliated occurrence of this taxon to the older Suchomasty Limestone; original and supplementary material of Šnajdr stored in Czech Geological Survey collections is nonetheless correctly affiliated to the Acanthopyge Limestone by author himself). Chlupáč (1983: 60, pl. 5), has mentioned a rare occurrence of Scabriscutellum (different than S. (S.) caelebs caelebs?) in Acanthopyge Limestone. The middle rib of the studied specimen slightly widens anteriorly, while in S. (S.) caelebs caelebs it narrows anteriorly ( Šnajdr 1960: pl. 26, figs 4, 8–9)