High-resolution Plate 15

Plate 15: All SEM images. Scale bars represent 0.5 mm (except scale bar for 5b that represents 50 µm). 1–3 Acetabulastoma arcticum Schornikov 1970. 1, USNM 594230, PS2189-1, 0–1 cm; LV, lateral view. 2, USNM 594231, PS2164-4, 0–1 cm; RV, lateral view. 3, USNM 594232, PS2200-5, 183 cm; LV, lateral view. 4 Paradoxostomatid sp. 1, USNM 594233, 10/2, 24–26 cm; RV, lateral view.
5–6 Paracytherois chukchiensis Joy and Clark 1977. 5a–b, USNM 594234, PS2200-5, 178 cm; RV, adult, lateral view (5a, whole view; 5b, closeup view). 6, USNM 594235, PS2200-5, 178 cm; LV, adult, lateral view. 7–11 Microcythere medistriata (Joy and Clark 1977). 7, USNM 594236, PS2179, 9–10 cm; RV, adult, lateral view. 8, USNM 594237, PS2200-5, 183 cm; LV, adult, lateral view. 9, USNM 594238, NP-19/9; RV, adult, lateral view. 10, USNM 594239, NP-19/10; LV, adult, lateral view. 11, USNM 594240, NP-19/10; LV, adult, internal view.