Hisonotus taimensis ( Buckup, 1981 )

Carvalho, Tiago Pinto & Reis, Roberto E., 2011, Taxonomic review of Hisonotus Eigenmann & Eigenmann (Siluriformes: Loricariidae: Hypoptopomatinae) from the laguna dos Patos system, southern Brazil, Neotropical Ichthyology 9 (1), pp. 1-48: 19-20

publication ID

1982-0224

persistent identifier

http://treatment.plazi.org/id/513387FA-1B10-FFB1-24BE-5619C466F88D

treatment provided by

Carolina

scientific name

Hisonotus taimensis ( Buckup, 1981 )
status

 

Hisonotus taimensis ( Buckup, 1981)  

Figs. 6b and 20b

Microlepidogaster taimensis Buckup, 1981: 22   (original description, type locality:novo canal do arroio Taim, Estação Ecológica do Taim, Rio Grande, Rio Grande do Sul, Brasil). -Buckup & Malabarba, 1983 [listed]. - Malabarba, 1989: 150 [listed]. - Grosser et al., 1994 [listed].

Hisonotus taimensis   . - Schaefer, 2003: 323 [listed, new combination]. -Bemvenuti & Moresco, 2005: 55 [listed and illustrated]. -Reis & Carvalho, 2007: 84 [listed]. - Ferraris, 2007: 248 [listed].

Diagnosis. Hisonotus taimensis   differs from its congeners, except from H. notopagos   and H. laevior   by the higher number of lateral plates 26-29 ( Table 2), vs. 20-25, by the number of predorsal plates 3-4 (usually 4), vs. 2-3, and by vertebral count 31-32, vs. 25-29 vertebrae. Hisonotus taimensis   differs from H. notopagos   by the presence of a posterior notch articulation in the rostral plate, vs. absence of a notch articulation in the rostral plate, by having a round caudal peduncle in cross section, vs. a slightly square caudal peduncle in cross section, and by having the area anterior to nares unplated, vs. area anterior to nares covered by dermal plates. Hisonotus taimensis   can be distinguished from H. laevior   by the narrow cleithral width 18.5-21.3% SL, mean 20.0%, vs. 20.6-24.6% SL, mean 22.9% ( Fig. 15), and by the lower body depth at dorsalfin origin 13.3-16.3% SL, mean 15.1%, vs. 16.2-20.8% SL, mean 18.1% ( Fig. 16).

Description. Morphometrics and meristics in Table 4. This species was described by Buckup (1981) and will not be redescribed here.

Distribution and habitat. Hisonotus taimensis   is known from localities nearby the laguna Mirim ( Fig. 22). This species inhabits, at type locality, slow flowing watercourses with brown waters of muddy and sandy bottom. The individuals are found in between aquatic vegetation of the genus Eichhornia   , in grasses or similar kind of submersed vegetation. According to Buckup (1981) the enlarged rostral and pelvic-fin odontodes contribute to them cling the stems and roots of Eichhornia   . See Grosser et al. (1994) for detailed description of the species habitat and distribution in the Taim region.

Material examined. All from laguna dos Patos system, Rio Grande do Sul, Brazil. Paratypes of M. taimensis: MAPA 1054   , 1, 36.3 mm SL, Santa Vitória do Palmar , channel at km 114 on highway BR-471, Estação Ecológica do Taim. MAPA 1055 View Materials , 1059- 1061 View Materials , 4 View Materials , 37.5-51.1 mm SL, Rio Grande , channel at east of lagoa do Jacaré , Estação Ecológica do Taim. MAPA 1070 View Materials , 1 View Materials , 26.1 mm SL, Santa Vitória do Palmar , old course of arroio Taim , Estação Ecológica do Taim. MAPA 1013 View Materials , 1014 View Materials , 1016 View Materials , 1018 View Materials , 1019 View Materials , 1024 View Materials , 1026-1028 View Materials , 1063-1065 View Materials , 1067-1069 View Materials , 15 View Materials , 30.1-47.4 mm SL, Rio Grande , new channel of arroio Taim , Estação Ecológica do Taim. MCN 4835-4844, 10, 34.7-45.9 mm SL, Rio Grande , new channel of arroio Taim , Estação Ecológica do Taim. MCN 7660, 2, 23.9- 50.0 mm SL, Rio Grande , north channel of lagoa do Jacaré , Estação Ecológica do Taim. UFRGS 352-353 View Materials , 2 View Materials , 40.4-43.5 mm SL, Rio Grande , new channel of arroio Taim , Estação Ecológica do Taim. UFRGS 396 View Materials , 1 View Materials , 37.3 mm SL. Rio Grande , new channel of arroio Taim near the highway BR-471. Non-types : MCP 14467 View Materials , 2 View Materials + 3 c&s, 21.8-42.5 mm SL, Rio Grande , new channel of arroio Taim , Estação Ecológica do Taim. MCP 17417 View Materials , 27 View Materials + 3 c&s, 24.6-41.8 mm SL, Rio Grande , new channel of arroio Taim. UFRGS 697 View Materials , 2 View Materials , 32.8-37.4 mm SL, Rio Grande , Estação Ecológica do Taim. UFRGS 2462 View Materials , 5 View Materials , 21.1-42.3 mm SL, Rio Grande , Estação Ecológica do Taim , curve in the new channel of arroio Taim on highway BR- 471. UFRGS 2583 View Materials , 1 View Materials , 36.2 mm SL, Rio Grande , Estação Ecológica do Taim , southeast margin of lagoa das Flores. MCN 6474, 1, 46.2 mm SL, Chuí , Barra do Chuí , 33º44’S 53º22’W. CIMC 2341, 2, 28.0- 30.7 mm SL, Rio Grande , canal near Estação Ecológica do Taim. CIMC 2405, 67, 20.6-37.3 mm SL, Capão do Leão , canal São Gonçalo near sanga das Traíras. INPA 791 View Materials , 1 View Materials , 47.5 mm SL, Rio Grande, arroio Bolacha. INPA 790 View Materials , 2 View Materials , 25.1-44.1 mm SL, Rio Grande, arroio Senandes GoogleMaps   .

SL

University of Sierra Leone, Njala University College

MCP

Pontificia Universidade Catolica do Rio Grande do Sul

Kingdom

Animalia

Phylum

Chordata

Class

Actinopterygii

Order

Siluriformes

Family

Loricariidae

Genus

Hisonotus

Loc

Hisonotus taimensis ( Buckup, 1981 )

Carvalho, Tiago Pinto & Reis, Roberto E. 2011
2011
Loc

Microlepidogaster taimensis

Malabarba, L 1989: 150
Buckup, P 1981: 22
1981