Paracoskinolina prestati Peybernés & Delmas, 1981

Schlagintweit, Felix, 2020, Cribellopsis Moulladei (Saint-Marc, 1974) Nov. Comb. (Foraminiferida, Orbitolinidae): An Albian Marker Taxon Of The Southern Neotethysian Margin, Acta Palaeontologica Romaniae 16 (1), pp. 37-41 : 39

Paracoskinolina prestati Peybernés & Delmas, 1981

The axial sections provided by Peybernès and Delmas (1981) as well as those from Prestat (1977; see synonymy) clearly evidence that the "pillars" are not aligned between subsequent chambers ( Fig. 1a–b, j–l, r ). This feature, however, is one of the diagnostic characteristics of the genus Paracoskinolina Moullade (see Arnaud-Vanneau, 1980, or Clavel in Granier et al., 2013, p. 153). Therefore, the upper? Albian Somali taxon can not be a species of Paracoskinolina . In fact, the partitions of the central zone in Cribellopsis are thickening "upwards" (= towards the apex; Arnaud-Vanneau, 1980, p. 668, "épaississent vers le haut"). This feature observable in axial sections, was also reported by Saint-Marc (1974, p. 225) for " Simplorbitolina " moulladei ("cloisons radiales ont une section triangulaire, en cȏne renversé"). It is worth mentioning here that this aspect of the central zone is described from several doubtful paracoskinolinas such as P. tunesiana Peybernès , P. pfenderae Canérot & Moullade , P. hispanica Peybernès , or P. querolensis Canérot & Peybernès as "hemi-pillars…pointe en haut" (e.g., Peybrnès and Delmas, 1981, p. 82). Transverse sections of Cribellopsis show that the vertical elements of the central zone are not isolated columnar pillars but sections of a reticulate (or anastomosing), often loose and poorly constrained, network formed by laterally fused main partitions (e.g., Fig. 1s ). This statement does not mean per se that all of the above cited species belong to Cribellopsis . Their taxonomic status must be clarified individually.

Figures

Fig. 1 Cribellopsis moulladei (Saint-Marc) nov. comb., Albian of Somalia (a–b, j–l, r), Italy (c–g, m, p–q, s), and Lebanon (h–i, n–o; type material). a–f Axial sections of megalospheric specimens. g, r Subaxial sections of possibly microspheric specimens. h–i, k Subaxial sections of megalospheric specimens. j, m Tangential-oblique sections. l, q Tangential sections. n–p, s Transverse sections. a–b, k extracted from Peybernès & Delmas (1981, pl. 1, fig. 1–2, h) as Paracoskinolina prestati; j, l extracted from Peybernès (1982, pl. 2, fig. 12, fig. 11) illustrated as Paracoskinolina prestati; c, f–g, m, p, q, s extracted from Chiocchini (1989, pl. 1, fig. 14, fig. 5, pl. 2, fig. 8, pl. 1, fig. 11, fig. 10, fig. 12, fig. 4) illustrated as Cribellopsis arnaudae n. sp.; d extracted from Schmitt et al. (2019, in press, fig. 5d) illustrated as Cribellopsis arnaudae Chiocchini. e extracted from Cruz-Abad (2018, fig. 93J) illustrated as Cribellopsis aff. arnaudae Chiocchini; h–i, n–o extracted from Saint-Marc (1974, pl. 2, figs. 6, 3–4, 7) illustrated as Simplorbitolina moulladei n. sp. r extracted from Prestat (1977, pl. 12, fig. 10) illustrated as Iraqia sp. Abbreviations: b = beam (or main partition), deu = deuteroconch, ib = intercalary beam, pr = proloculus