Plate 1

Hypselaster strougoi n. sp.; 1–1d SUSGM 018-10-160 (holotype), aboral, oral, posterior, left lateral views and closeup of apical disc, respectively, showing complete latero-anal fasciole on this side of the test; the other side is eroded. 2–2d SUSGM 018-10-161, aboral, oral, posterior, left lateral views and closeup of apical disc, respectively, showing complete latero-anal fasciole on this side of the test; the other side is eroded. 3–3e SUSGM 018-10-162, aboral, oral, posterior, left lateral, right lateral views, closeup of interambulacrum 1 of 3d and closeup of apical disc, respectively; (3c, 3d, 3d1 showing incomplete latero-anal fasciole on two sides of the test). 4–4g SUSGM 018-10-163 (paratype 1); 4–4e aboral, oral, posterior, left lateral, closeup of interambulacrum 1 of 4c, right lateral and tilted right lateral views, respectively; (4c, 4c1 showing incomplete latero-anal fasciole on this side of the test), (4d, 4e showing complete latero-anal fasciole on this side of the test); 4f closeup of petal II and peripetalous fasciole on interambulacrum 1; 4g closeup of apical disc of 4. 5–5d SUSGM 018-10-164 (paratype 2), aboral view, closeup of right lateral side of posterior end with incomplete latero-anal fasciole, closeup of petal V, closeup of ambulacrum III and apical disc and closeup of petal II and peripetalous fasciole on interambulacrum 1, respectively. Scale bars equal 5 mm