Pleuroceras cf. quadratum Howarth, 1957
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publication ID |
https://doi.org/10.1186/s13358-025-00366-5 |
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persistent identifier |
https://treatment.plazi.org/id/6B11FC53-C265-4876-FC8B-FA1197FCFB75 |
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treatment provided by |
Felipe |
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scientific name |
Pleuroceras cf. quadratum Howarth, 1957 |
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Pleuroceras cf. quadratum Howarth, 1957
( Fig. 3H, L, M View Fig )
cf. * 1957 Pleurocera s sp. nov. Howarth, p. 193, 197, 200.
cf. * 1958 Pleuroceras quadratum Howarth , p. 35, pl. 8, figs. 2–5, 9
cf.? 1972 Pleuroceras cf. quadratum Howarth ; Dadlez & Kopik, pl. 1, fig. 12.
cf. 1985 Pleuroceras immature du gr. quadratum Howarth ; Mattei, pl. 12, fig. 10.
cf. 1988 Pleuroceras solare forme quadratum (Howarth) ; Meister, pl. 7, fig. 4
cf. 2004 Pleuroceras quadratum (Howarth) ; Sciau, pl. 44, fig. 11 only.
cf. 2007 Pleuroceras quadratum Howarth ; Sapunov & Metodiev, fig. 3p–q
cf. 2023 Pleuroceras quadratum (Howarth) ; Bohain, pl. 43, figs. 3–4, 6, pl. 46, fig. 7, pl. 47, fig. 2, pl. 50, fig. 1(cf.), pl. 52, fig. 1–2
Material: Two juveniles (Ge 33508 and Ge 33509) and three more incomplete juvenile specimens.
Description: Evolute coiling with quadrilateral whorl section, the flanks slightly converging towards venter in some specimens. Radiate to slightly proradiate, relatively sharp ribs with small tubercles on the latero-ventral edge. Te tubercles can be very strong on early juvenile whorls. Ribs are curved forward on the venter, approaching the keel. Ventral side almost flat in the innermost stout whorls with low blunt keel, which becomes stronger and crenulated later.
Occurrence: Apyrenum Subzone of the Spinatum Zone (Meister, 1988) . It occurs in North-West Europe in UK, France and Poland, and in Western Tethys in Bulgary, and the Czech Republic (Outer Western Carpathians).
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