Fly-eater Mini Tetra

description

Description. Morphometric data in Table 2. Body elongated and compressed. Greatest body depth at dorsal-fin origin. Dorsal profile of head strongly convex from tip of snout to vertical through anterior margin of anterior nares; gently convex from that point to base of supraoccipital process, then straight to slightly concave along length of supraoccipital process. Predorsal profile convex. Profile straight to slightly convex along dorsal-fin base. Dorsal profile from last dorsal-fin ray insertion to adipose fin slightly convex in immatures and females, deeply convex in adult males with ventrally arched caudal peduncle. Dorsal profile straight to slightly concave from end of adiposefin base to anteriormost dorsal procurrent caudal-fin ray. Ventral profile of head convex along anterior region of lower jaw, gently convex from that point to pelvic-fin insertion. Ventral region straight to slightly concave from pelvic-fin insertion to anal-fin origin in immatures and females, deeply concave in mature males. Anal-fin base slightly concave in immatures and females; conspicuously convex in mature males along anterior region supporting hypertrophied anal-fin rays and then straight posterior

Review of the species of the genus Serrapinnus Malabarba, 1998 (Teleostei: Characidae: Cheirodontinae) from the rio Tocantins-Araguaia basin, with description of three new species

diagnosis

Diagnosis. Serrapinnus lucindai is primarily distinguished from its congeners by the 17 to 19 ventral procurrent caudal-fin rays (vs. less than 17). Furthermore, the species can also be diagnosed from the remaining species of the genus by the presence of anal-fin hooks on the first unbranched and five branched rays of mature males (vs. anal-fin hooks on at least the anterior six branched rays on the remaining species of the genus), the absence of a continuous mid-lateral black stripe extending from the opercular region to the caudal-peduncle spot (vs. presence of a stripe in S. sterbai), the presence of 9 to 11 cusps on the premaxillary teeth (vs. 5 in S. microdon and S. potiguar, 7 in S. aster, 7 to 9 in S. calliurus, S. heterodon, S. kriegi, S. micropterus, S. notomelas and S. piaba, and 10 to 12 in S. gracilis and S. littoris), the dentary teeth without expanded cusps forming a sharp cutting edge and the incomplete lateral line (vs. dentary teeth with expanded cusps forming a sharp cutting edge and complete lateral line in S. heterodon), the hyaline dorsal fin (vs. fin with a proximal black blotch in S. notomelas), and an absence of a black spot in the posteroventral region of t

Review of the species of the genus Serrapinnus Malabarba, 1998 (Teleostei: Characidae: Cheirodontinae) from the rio Tocantins-Araguaia basin, with description of three new species

distribution

Distribution. Serrapinnus lucindai is distributed in several tributaries of the rio Tocantins-Araguaia basin (Fig. 5 b).

Review of the species of the genus Serrapinnus Malabarba, 1998 (Teleostei: Characidae: Cheirodontinae) from the rio Tocantins-Araguaia basin, with description of three new species

etymology

Etymology. The species name lucindai is in honor to the Brazilian ichthyologist Paulo Henrique Franco Lucinda (UNT), in recognition of his contribution to the taxonomy of Neotropical freshwater fish, mainly those of the rio Tocantins basin.

Review of the species of the genus Serrapinnus Malabarba, 1998 (Teleostei: Characidae: Cheirodontinae) from the rio Tocantins-Araguaia basin, with description of three new species