Lophophaena sp. F

Plate 38, Figs. 1A – 2B.

unknown plagonid group C sp 29, Trubovitz et al. 2020, supplementary data 7.

Remarks. This species is notable for its smooth, thumb-shaped cephalis, with relatively large pores and no prominent spines. The thorax is wider than cephalis, and no thoracic spines are present. Due to a lack of characters, this species is difficult to distinguish from broken specimens of similar taxa that do have numerous spines, such as Lophophaena nadezdae (Pl. 23, Figs. 1A – 2C).

Material examined. Over 300 specimens observed from samples 321-1337A-12H-5, 23–26cm (Late Miocene), 321-1337A-10H-2, 91–94cm (Early Pliocene), 321-1337A-7H- 6, 104–107cm (Early Pliocene), 321-1337A-6H-3, 29–32cm (Late Pliocene), 321-1337A-5H-5, 11–14cm (Late Pliocene), 321-1337A-4H- 6, 115–118cm (Early Pleistocene), 321-1337A-4H-2, 16–19cm (Middle Pleistocene), 321-1337A-3H- 2, 103–106cm (Middle Pleistocene), 321-1337A-2H-3, 76–79cm (Late Pleistocene), and 321-1337D-1H-1, 0–3cm (Recent).

Range. Latest Miocene—Recent, EEP (Table 1).