Skip to main content
. 2012 Mar 2;7(3):e31940. doi: 10.1371/journal.pone.0031940

Figure 6. Diversity of ophiuroid skeletal elements: lateral arm plates and vertebrae.

Figure 6

A–O. arm vertebrae; A–K. zygospondylous articulation. A–B. Ophiura sarsii (Ophiuridae); C–E. Ophiothrix fragilis (Ophiotrichidae), keeled type; F–G. Ophiocoma erinaceus (Ophiocomidae); H–I. Ophiacantha bidentata (Ophiacanthidae); J–K. Ophioderma longicauda (Ophiodermatidae); L–O. streptospondylous articulation, Gorgonocephalus eucnemis (Gorgonocephalidae); L–M. regular vertebrae; N. first vertebra of a new branch; O. last vertebra before a new branch (N and another similar vertebra articulate with O). P–Z. lateral arm plates. P–Q. O. sarsii; R–S. O. fragilis; T–U. O. erinaceus; V–W. O. bidentata; X–Y. O. longicauda; Z. G. eucnemis, dist, distal; ext, external; g, groove; int, internal; k, keel; m, muscle attachment area; prox, proximal; sa, spine articulation. Scale bars in millimetres.