Phylogenetic Analysis and Redescription of the Genus Henochilus (Characiformes: Characidae)

Henochilus, a characiform genus endemic to eastern Brazil is reviewed. A single species, Henochilus wheatlandii, from the Rio Doce and possibly the Rio Mucuri in the states of Minas Gerais and Espirito Santo is recognized and redescribed. The phylogenetic analysis indicates that Henochilus is most closely related to the clade consisting of Brycon and likely Chilobrycon.

Resumen

Henochilus, um gênero de Characiformes endêmico do leste do Brasil, é revisto. Uma única espécie, Henochilus wheatlandii, do Rio Doce e possivelmente do Rio Mucuri, nos Estados de Minas Gerais e Espirito Santo, é reconhecida e redescrita. A análise filogenética indica que Henochilus é mais proximamente relacionado com o clado composto por Brycon e possivelmente Chilobrycon.

Fig. 1.

Map of Rio Doce, Rio Mucuri, and adjoining basins showing distribution of Henochilus wheatlandii. Holotype locality indicated by star; nontype Thayer Expedition material indicated by triangle; other samples by dots (A = Rio Doce; B = Rio Mucuri; C = Rio São Francisco; D = Rio Jequitinhonha; E = Rio Paraíba do Sul; F = Rio Grande)

Fig. 2.

Henochilus wheatlandii: (A) MZUSP 73118, 75.5 mm SL; and (B) MZUSP 75398, 239.7 mm SL.

Fig. 3.

Henochilus wheatlandii: (A) right premaxilla and maxilla in lateral view, and (B) premaxilla and premaxillary dentition in ventral view; LIRP 4018, 134.1 mm SL

Fig. 4.

Fifth through seventh premaxillary teeth of Henochilus wheatlandii: (A) 254.9 mm SL specimen (MZUSP 73105); and (B) 65.8 mm SL specimen (MZUSP 73118); drawings not to scale, anterior to right

Fig. 5.

Strict consensus MP tree of five equally parcimonious trees obtained when gaps were considered as missing data and Ti:Tv ratio was 1:1 (TL = 2392, CI = 0.28, RI = 0.36). Numbers above branches are bootstrap values from 1000 replicates. Numbers below branches are bootstrap values based on 100 replicates in the ML analysis. Bootstrap values below 50% are not shown

Contributor Notes

(RMCC) LaboratÓrio de Ictiologia de RibeirÃo Preto, departamento de biologia, Faculdade de Filosofia, CiÊncias e Letras de RibeirÃo Preto, Universidade de SÃo Paulo, Avenida Bandeirantes 3900, 14040-901 RibeirÃo Preto, SÃo Paulo, Brazil; (RPV) Department of Zoology, Division of Fishes, National Museum of Natural History, Smithsonian Institution, Washington, DC 20560-0159; (FV) Ecologia, ConservaÇÃo e Manejo de Vida Silvestre, Instituto de CiÊncias BiolÓgicas, Universidade Federal de Minas Gerais, CP 486, 30161-970 Belo Horizonte, MG, Brazil; and (CO) Departamento de Morfologia, Instituto de BiociÊncias, Universidade Estadual Paulista, 18618-000 Botucatu, SÃo Paulo, Brazil. (RMCC) rmcastro@ffclrp.usp.br; (RPV) vari.richard@nmnh.si.edu; (FV) eleotris@dedalus.lcc.ufmg.br; and (CO) claudio@ibb.unesp.br Send reprint requests to RMCC.