Description of a new species of   <i>Microglanis</i> (Siluriformes: Pseudopimelodidae) from the Amazon basin, Amazonas State, Brazil

Jarduli, Lucas Ribeiro; Shibatta, Oscar Akio

doi:10.1590/S1679-62252013000300004

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Original Articles • Neotrop. ichthyol. 11 (03) • Sept 2013 • https://doi.org/10.1590/S1679-62252013000300004 linkcopy

Description of a new species of Microglanis (Siluriformes: Pseudopimelodidae) from the Amazon basin, Amazonas State, Brazil

Authorship SCIMAGO INSTITUTIONS RANKINGS

Abstract

The first species of Microglanis from the rio Amazonas, Amazonas State, Brazil is described. This species differs from all congeners by the forked caudal fin, and color pattern of the supraoccipital region consisting of two elliptical and juxtaposed pale spots, besides a combination of morphometrics characters.

Bumble-bee catfish; Multivariate morphometrics; Systematics

Characters	Holotype	Min.-Max.	Mean± SD
Standard length (mm)	27.7	20.8-27.7	23.7±2.2
Percents of SL
Head length	29.7	27.4-30.0	28.4±1.1
Pelvic fin length	19.3	15.8-20.1	18.0±1.3
Dorsal spine length	15.9	11.4-15.9	13.0±1.4
Pectoral spine length	19.2	15.5-19.2	16.9±1.2
Posterior cleithral process length	11.9	9.6-14.5	11.8±1.7
Predorsal length	38.6	35.5-38.6	37.1±1.1
Preventral length	54.4	49.5-54.4	52.1±1.7
Preanal distance	72.5	68.1-74.1	70.9±2.1
Caudal peduncle depth	11.2	9.9-11.3	10.8±0.4
Caudal peduncle length	12.2	9.9-17.7	14.4±3.0
Body width	30.4	26.4-30.4	27.6±1.4
Dorsal-fin base length	13.5	9.7-14.4	13.0±1.4
Adipose-fin base length	16.6	13.1-16.6	14.6±1.1
Anal-fin base length	12.2	9.5-12.9	11.0±1.0
Percents of HL
Interorbital length	44.2	40.4-44.2	42.0±1.3
Eye diameter	9.8	8.0-9.8	9.1±0.7
Snout length	43.8	38.3-43.8	40.8±2.1
Mouth width	44.4	38.0-47.3	43.4±2.4
Maxillary barbel length	104.1	89.4-104.1	96.7±4.7

	CV1 (81.11%)	CV2 (16.47%)
Head length	-0.14042	-0.1891
Interorbital distance	0.10768	0.43904
Eye diameter	-0.11396	-0.19571
Snout length	-0.014809	0.41971
Mouth width	0.10935	0.07983
Maxillary barbel length	0.023589	0.26127
Anal fin length	-0.072884	0.050899
Dorsal spine length	-0.069149	0.13113
Pectoral spine length	0.10587	0.31419
Humeral process length	-0.037374	0.0036545
Predorsal distance	-0.11807	0.060669
Preventral distance	-0.088499	-0.073199
Preanal distance	0.34928	-0.38767
Caudal peduncle height	-0.084459	-0.26858
Caudal peduncle length	-0.059994	0.10492
Body width	-0.073092	-0.2741
Dorsal-fin base length	-0.061181	0.023965
Adipose-fin base length	-0.061677	0.10203
Anal-fin base length	-0.011569	-0.18645

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Sociedade Brasileira de Ictiologia Neotropical Ichthyology, Departamento de Biologia Animal e Vegetal, CCB, Universidade Estadual de Londrina, Rodovia Celso Garcia Cid, Km 380, Cidade Universitária, 86055-900, Londrina, Paraná, Brazil, Phone +55(43)3371-5151 - Londrina - PR - Brazil
E-mail: neoichth@nupelia.uem.br

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