Ophiopetagno Thuy, Eriksson & Numberger-Thuy 2022

Genus Ophiopetagno Thuy, Eriksson & Numberger-Thuy, 2022 Type species Ophiopetagno paicei Thuy, Eriksson & Numberger-Thuy, 2022, by original designation. Diagnosis (modified from Thuy et al. 2022) Ankhurid ophiuroid with relatively thin, slightly arched, elongate lateral arm plates; ventro-proximalwards protruding ventral portion; ventral plate edge with a clear tentacle notch incision and with well-developed ambulacral groove spine articulations; large, prominent lateral spine articulations consisting of a single round opening surrounded by an elevated ring; inner side of lateral arm plates with large, sub-triangular vertebral articular knob; vertebrae roughly cylindrical, with slightly concave waist; lateral sides with deep podial basin distally, and subtriangular articulation surface proximally, matching vertebral articular knob on inner side of lateral arm plates; distal side with large, dorsally converging zygocondyles; water vessel canal running entirely within vertebra, distally enclosed by large zygosphene. Other species included Ophiopetagno bonzo sp. nov., Ophiopetagno kansas sp. nov., Ophiopetagno doro sp. nov., Ophiopetagno sp. 1 and Ophiopetagno sp. 2.