Praeradiolites subtoucasi Toucas 1907
Creators: name: Săsăran, Liana
name: Săsăran, Emanoil
name: Bucur, Ioan I.
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Animalia
Mollusca
Bivalvia
Hippuritida
Radiolitidae
Praeradiolites
Praeradiolites subtoucasi

description: Praeradiolites subtoucasi Toucas, 1907   
Fig. 7 d-e.  
 1907 Praeradiolites subtoucasi n.sp. - Toucas, p. 31, pl. 3, figs. 8, 9.   
 1954 Praeradiolites subtoucasi Toucas- Astre, p. 61, 76- 77, 83, pl. 6, figs. 1, 2.   
 1962 Praeradiolites cf. subtoucasi Toucas- Astre, p. 306, 308.   
 1965 Praeradiolites subtoucasi Toucas- Pamouktchiev, p. 37, pl. 4, fig. 1, text-fig. 6.   
 1976 Praeradiolites subtoucasi Toucas- Lupu, p. 126, pl. 17, figs. 4,5a-b, pl. 39, fig. 6.   
 1977 Praeradiolites subtoucasi Toucas- Pons, p. 69, pl. 50, figs. 1a-d.   
 1992 Praeradiolites subtoucasi Toucas- Vicens, p. 201, pl. 75, figs. 1-15, pl. 76, figs. 3-4, pl. 79, figs. 1-5.   
 1995 Praeradiolites cf. subtoucasi Toucas- Morris & Skelton, p. 292, pl.6, figs.3,4.   
 1999 Praeradiolites subtoucasi Toucas- Fenerci, p. 90- 94, text-figs. 3.28, 3.29, pl. VII, figs. 1-7.   
 2004 Praeradiolites subtoucasi Toucas- Fenerci, p. 93, pl. 1, figs. 1-6.   
 2006 Praeradiolites subtoucasi Toucas- Pons and Vicens, p. 15-16, fig. 13F, fig. 14G.   
 2012 Praeradiolites subtoucasi Toucas- Pons et al., p. 690, fig. 11B.   
 2013 Praeradiolites subtoucasi Toucas- Özer et al., p. 35-36, pl. II, figs. A-F; pl. III, figs. A-H.   
Material: two lower valves (samples nos.24080, 24081 BBU-MPS).  
Description: The shape of RV is conical to cylindrical in both specimens, having 38 and 42 mm in length and its surface is ornamented with horizontal growth lines. Diameter of RV near to the commissure is 30 mm (24081 BBU-MPS) and 35 mm (24080 BBU-MPS) with an oval contour in transverse sections (Fig. 7d, e). The outer shell layer is generally thin, ranging from 3 to 8 mm thickness on the dorsal side, were cellular structures alternate with thin calcitic compact layers. In ventral side of both RVs the outer shell layer is very eroded and the radial bands (Vb and Pb) are represented by two longitudinal grooves that show approximately the same width (Fig. 7d, e). The Ib is represented by longitudinal costae and has a width ranges from 4 to 7 mm. The ligamental ridge (L) is long (5 respectively 7 mm) has a thin stem and is rounded at its extremity (Fig. 7d, e). The cardinal apparatus is preserved showing the teeth (at and pt) and the posterior (pm) and anterior myophores (am) (Fig. 7e).  
 Discussion and remarks: Vicens (1992) designated Praeradiolites aristidis ( Munier-Chalmas, 1888) and Praeradiolites echennensis ( Astre, 1954) as synonyms of Praeradiolites subtoucasi (Toucas, 1907). Instead, Steuber (1999) described from Greece species of Praeradiolites echennensis ( Astre, 1954) that can be distinguished from the other two species (P. aristidis and P. subtoucasi) therefore considered P. echennensis as valid species.   
Age and distribution: late Santonian-early Campanian in France (Astre, 1962), Spain (Vicens, 1992), Romania (Lupu, 1976; Săsăran et al., 2010); Maastrichtian in Croatia (Gušić and Jelaska, 1990; Steuber et al., 2005), Oman (Morris and Skelton, 1995), Turkey (Fenerci, 1999, 2004), Iraq (Özer et al., 2013).
description: Published as part of Săsăran, Liana, Săsăran, Emanoil & Bucur, Ioan I., 2018, Upper Cretaceous Rudist-Bearing Mixed Siliciclastic-Carbonate And - Volcanoclastic Deposits From Strâmturii Valley, Borod Basin, Northern Apuseni Mountains: Description, Microfacies And Depositional Environments, pp. 3-20 in Acta Palaeontologica Romaniae 14 (1) on pages 11-12, DOI: 10.5281/zenodo.13190185