Hyphessobrycon langeanii

Hyphessobrycon langeanii Lima & Moreira 2003

Hyphessobrycon langeanii Lima & Moreira (2003) . Paratypes: 1 lot, 5 specimens; DZSJRP 5467, 28.7–34.0 mm SL, córrego Mosquito, Km 476.3 of Ferronorte railroad, upper rio Araguaia basin, Alto Araguaia, Mato Grosso, Brazil, 17°25’8”S, 53°13’60”W, cols. C.R. Moreira & F.C.T. Lima, 19 May 2001.

Annotated catalog of the type specimens deposited at the fish collection of the “ Universidade Estadual Paulista, Câmpus de São José do Rio Preto ”, São Paulo, Brazil (DZSJRP)

description

Description. Morphometric data of the holotype and paratypes are presented in Table 1. Body compressed, moderately slender, greatest body depth at pelvic-fin origin. Dorsal profile of head convex from upper lip to vertical through middle of orbit; slightly concave from latter point to tip of supraoccipital spine. Predorsal profile of body convex, dorsal-fin base posteroventrally inclined, straight to slightly convex in smaller individuals (less than 50 mm SL), and convex in larger specimens (see Figs. 2 - 3). Body profile straight to convex from end of base of dorsal fin to adipose fin; slightly concave between latter point to origin of dorsalmost procurrent caudal-fin ray. Ventral profile of head and body convex from lower lip to vertical through pectoral-fin insertion; slightly convex from latter point to pelvic-fin insertion. Ventral profile between pelvic-fin insertion and anal-fin origin straight. Body profile along anal-fin base straight to slightly convex and posterodorsally slanted. Ventral profile of caudal peduncle slightly concave. Jaws equal, mouth terminal. Maxilla reaching middle of orbit. Premaxillary teeth in two rows (Fig. 4). Outer row with 2 (2), 3 (16), or 4 * (

Three new species of Hyphessobrycon (Characiformes: Characidae) from the upper rio Araguaia basin in Brazil

diagnosis

Diagnosis. Hyphessobrycon langeanii can be distinguished from all congeners by the presence of a single well-defined, round to horizontally oval humeral spot, similar to the one found in species of the Astyanax bimaculatus (Linnaeus) complex (vs. humeral spot absent, double, or variously developed, never round to horizontally oval). It can also be distinguished from its congeners, except H. reticulatus Ellis, by the combination of a reticulate dark pigmentation pattern, a broad, horizontally-elongate caudal-peduncle blotch, a narrow dark stripe extending along the central caudal-fin rays, 5 or 6 horizontal scale rows between the dorsal-fin origin and the lateral line, 4 or 5 horizontal scale rows between the lateral line and the pelvic-fin origin, and 15 - 20 branched anal-fin rays. Hyphessobrycon langeanii can be distinguished from H. reticulatus by the possession of a conspicuous, dark round to oval humeral spot (vs. relatively faint, vertically-elongate humeral spot), a horizontally-elongate caudal-peduncle blotch (vs. vertically-elongate caudal-peduncle blotch), the midlateral dark stripe relatively wide and faint (vs. midlateral dark stripe extremely narrow and well-defined),

Three new species of Hyphessobrycon (Characiformes: Characidae) from the upper rio Araguaia basin in Brazil

etymology

Etymology. The new species is named after our colleague Francisco Langeani, who first collected the new species.

Three new species of Hyphessobrycon (Characiformes: Characidae) from the upper rio Araguaia basin in Brazil