GBIF Taxonomic Backbone & Wikipedia Registry Profile
Description. Morphometric and meristic data of topotypes are presented in Table 1 and 2, respectively (largest examined specimen 46.2 mm SL). Body slightly short and somewhat depressed. Greatest body width at cleithrum, progressively tapering to the end of caudal peduncle. Dorsal profile slightly convex from snout to dorsal-fin origin; slightly concave from dorsal-fin origin to adipose fin; straight at adipose fin base; slightly concave from this point to origin of uppermost caudal-fin rays. Ventral body profile of head straight or slightly concave; ventral profile of trunk somewhat convex from pectoral girdle to posterior base of pelvic fin; ventral profile of trunk somewhat convex from pectoral girdle to posterior base of pelvic fin; somewhat concave of the anus origin to lowermost caudal-fin rays. Head and snout depressed and rounded in dorsal view. Eyes relatively small, dorsolaterally positioned midway between snout tip and pterotic-supracleithrum anterior margin; distance between orbit margin and ventral surface of head greater than orbital diameter. Dorsal iris operculum present. Interorbital space slightly convex. Pectoral girdle completely exposed and covered by odontodes, except for small triangular anterior area over median suture where skin is visible in some specimens, arrector fossae small, almost meeting in at midline. Greatest body depth at dorsal-fin origin, inferior rostral margin of snout with posteriorly directed odontodes; odontodes on upper part of head, arranged in rows and similar in size those of the inferior rostral margin of snout. Oral disk ovate with numerous small papillae; maxillary barbels shorter than orbital diameter. All teeth short and bifid. Trunk depressed at insertion of dorsal and anal fin. Caudal peduncle rounded in cross section. Dorsal fin i, 7; its origin immediately posterior to unbranched first ray of the pelvic-fin; other rays branched; dorsal fin when adpressed extending to vertical through beyond anal-fin base. Adipose fin present. Pectoral fin i, 6; unbranched pectoral fin first ray, slightly curved, covered with small odontodes, reaching one quarter to one third of length of first pelvic-fin ray; other rays branched. Pelvic-fin rays i, 5; unbranched first ray curved, covered with small odontodes; pelvic-fin reaching beyond anus, ending just anterior to anal-fin origin. Anal-fin i, 5; base covering three plates. Caudal fin i, 14, i; slightly notched, with lower lobe slightly longer than upper. Lateral-line canal in median series complete, pore tube visible. Abdomen completely covered of dermal plates between the pectoral girdle and the anus; with five to seven rows of elongate plates. Dorsal-fin spine flexible, with locking mechanism nonfunctional, followed by seven branched rays. Nuchal plate exposed, not covered by skin. Dorsal-fin spinelet present, V-shaped, wider than base of dorsal spine. Total vertebrae 21 (2 c & s). Coloration. Background color in ethanol of dorsal and lateral surfaces dark brown to grayish, with four lighter dark brown bars inconspicuous on the upper part of the trunk; most previous at the dorsal fin origin; the second on the base of the dorsal fin; the third at the adipose fin origin and the last on the caudal peduncle, near the origin of the caudal fin. Side with a dark brown band extending from the previous part or the snout to the caudal peduncle. Clear yellowish small elongated spots on the dorsal and lateral regions of the head and trunk, lighter patch in the pineal region; the spots of the trunk generally converging in two series on the lateral (Figs. 1, 2). Ventral region of the head and abdomen (trunk) yellowish. Fins with dark chromatophores concentrated, forming irregular set of stripes that alternates between dark brown and yellow clear: dorsal fin of three or four stripes; pectoral, pelvic and anal fins of two or three stripes dark brown inconspicuous. Caudal fin with three stripes dark, the first two rather dark: one transversal on the base of fin, the second a bar oblique only in the lower lobe and third transversal inconspicuous in both lobes. Coloration in life follows the same pattern described above, with the small elongated spots yellowish pattern more evident (Fig. 4).
