Fig. 2 in Understanding the color variability and resolving taxonomic confusion in the sea cucumber Isostichopus badionotus (Echinodermata, Holothuroidea): a revision of the genus Isostichopus

Fig. 2 (see previous page). Ossicles of species and subspecies of Isostichopus Deichmann, 1958. A–H. Tables. A. Regular tables present in several parts of the body in the five species (1–2 = lateral view; 3 = top or dorsal view; 4 = ventral view). B. Large, regular tables, only present in I. maculatus maculatus (Greeff, 1882) (lateral view). C. Table with reduced disc, only present in the dorsal body wall of I. macroparentheses (Clark, 1922) adults (lateral view). D. Large tables with disc and spire modified, only present in the top of the dorsal papillae of I. maculatus maculatus – "modified maculatus tables" (lateral view, top view). E. Regular tables present in the ventral body wall and tube feet (top and lateral view). F. Tables with low and incomplete spires, present in the tentacles (top view). G. Tables with circular spire, several pillars, observed in the cloaca of I. fuscus (top and lateral view). H. Large tables with well-developed spires, several pillars forming a very dense and thick crown of spines, present in the mouth membrane and other internal organs (top and lateral view). I–T. Rods. I. Large thin C-shaped rods present in I. macroparentheses. J–K. Thin C, S-shaped rods present in the body wall, papillae and tube feet, and some internal organs. L. Thick C rods and worm-shaped rods present in the dorsal papillae of I. maculatus maculatus and I. maculatus phoenius (Clark, 1922). M. Simple rods present in several internal organs. N. Simple rods present in gonads. O. Simple rods present in the tentacles. P. Cross-shaped rods present in the intestine. Q. Branched rods present in several internal organs. R. Irregular plate-like branched rods present mostly in the anterior cloaca. S. Large, curved rods with quadrangular projections in the middle, present in the papillae. T. Large slightly or strongly curved rods with wide perforated expansions in the middle, present in the tube feet. U–X. Perforated plates. U. Perforated plates from papillae. V. Perforated plate from tube feet. W. End-plate. X. Tridimensional spheres only observed in the respiratory trees of I. macroparentheses. Photos by G. Borrero.