Cloacaspis ekphymosa Fortey, 1974

Hopkins, Melanie J., 2019, Phylogenetic analysis and revision of the trilobite subfamily Balnibarbiinae (Olenidae), American Museum Novitates 2019 (3928), pp. 1-1 : 1-

Cloacaspis ekphymosa Fortey, 1974

Figure 4A

Triarthrus sp. Ross, 1965: 18 , pl. 8, fig. 4.

Cloacaspis ekphymosa Fortey, 1974: 41 , pl. 11, figs. 12, 14–18.

HOLOTYPE: Cranidium, SMA 84075 (figured in Fortey, 1974: pl. 11, fig. 12).

TYPE LOCALITY: Profilstranda, Olenidsletta Member, Valhallfonna Formation, Ny Friesland, Spitsbergen, Svalbard.

OTHER GEOGRAPHIC OCCURRENCES: Lost River Area, Seward Peninsula, Alaska (see Ross, 1965).

STRATIGRAPHIC RANGE: Fortey (1974, 1980) recovered this species from 105 m to 120 m in the section of Fortey (1980), stratigraphically below the congeneric Cloacaspis senilis , which was recovered from 120 m to 145 m above the base of the Olenidsletta Member. This species was recovered in 2016 cooccurring with Cloacaspis senilis at 139 m above the base of the

Figures

FIGURE 4. Cloacaspis spp. A. Cloacaspis ekphymosa Fortey, 1974, USNM 144232. Collected from the Lost River Area on Seward Peninsula, Alaska, and previously identified as Triarthrus sp. (Ross, 1965). Arrow pointing to postpalpebral furrow. B. Anterior border of Cloacaspis ceryx anataphra (Fortey, 1974), AMNH- FI-101655. Black arrows pointing to faint anterior border pits on internal mold. C. Cloacaspis ceryx anataphra (Fortey, 1974), AMNH-FI-101655. Collected from PO-18 of the Olenidsletta Member of the Valhallfonna Formation (Kröger et al., 2017). D) Cloacaspis ceryx ceryx (Fortey, 1974), AMNH-FI-101657. Close-up of E, anterior glabellar lobe and F,posterior wing, showing presence of fine granulation of recently prepared surface (white arrow) and lack of granulation on exposed and slightly eroded surface (black arrow). Collected from bed PO-18 of the Olenidsletta Member of the Valhallfonna Formation (Kröger et al., 2017). Scale bars = 1 mm except A and D, where scale bar = 5 mm.