Lophophaena undetermined

Lophophaena sp. cf. Trisulcus testudus Petrushevskaya, 1971 group

Plate 36, Figs. 5A – 7B.

? Trisulcus testudus n. sp., Petrushevskaya, 1971, pl. 72, figs. 1–3.

unknown plagonid group C sp 65, Trubovitz et al., 2020, supplementary data 7.

Remarks. The specimens we illustrate here resemble a species described by Petrushevskaya (1971), Trisulcus testudus. We believe our specimens may belong to two separate species, but it is unclear which of these, if either, fit Petrushevskaya’s concept, due to her somewhat ambiguous illustrations (pl. 72, figs. 1–3) and no designation of a type specimen. Regardless, we suspect that Trisulcus testudus Petrushevskaya may fit the definition of Lophophaena better than Trisulcus, due to the proportions and characteristics of the cephalis and thorax. Here we call our specimens Trisulcus testudus? (group) to convey their similarity to Petrushevskaya’s species, but also to indicate that there are multiple forms which may justify separate species after more specimens can be studied.

Range. Three specimens from Latest Pliocene—Recent, EEP (Table 1).