FIGURE 4. Ophioplocus januarii ZUEC OPH 2207 in Shallow-water brittle stars (Echinodermata: Ophiuroidea) from Araçá Bay (Southeastern Brazil), with spatial distribution considerations

FIGURE 4. Ophioplocus januarii ZUEC OPH 2207 (4.4 mm dd). (A) Dorsal view. (B) Ventral view. (C) Detail of the oral view. (D) Detail of dorsal arm. (E) Detail of ventral arm. (F) Dorsal arm plates. (G) Ventral arm plate. (H-I) Lateral arm plate. (J) Vertebra—proximal surface. (K) Vertebra—distal surface. (L) Vertebra—dorsal surface. (M) Vertebra—ventral surface. Abbreviations: ads: adoral shields; ap: apical papilla; as: arm spine; bs: bursal slits; cpp: central primary plate; d: dorsal; dap: dorsal arm plate; ddi: dorso-distal; ddmf: dorso-distal muscular fossae; di: distal; dp: dorso-proximal; lap: lateral arm plate; lop: lateral oral papillae; ma: madreporite; os: oral shields; p: proximal; pe: perforation; prp: primary radial plates; rs: radial shields; tn: tentacle notch; tp1: tentacle pore 1; tp2: tentacle pore 2; ts: tentacle scale; v: ventral; vap: ventral arm plate; vdi: ventrodistal; vp: ventro-proximal; zd: zygocondyle; zp: zygosphene. Stereomicroscope photos: (A)–(E), scale bar equal to 0.5 mm. SEM photos: (F)–(M), scale bar equal to 100 µm.