A new species of bumblebee catfish of the genus <i>Microglanis</i> (Siluriformes: Pseudopimelodidae) from the upper rio Paraguay basin, Brazil

Shibatta, Oscar Akio

doi:10.1590/1982-0224-20160031

Brasil

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ARTICLES • Neotrop. ichthyol. 14 (03) • 2016 • https://doi.org/10.1590/1982-0224-20160031 linkcopy

A new species of bumblebee catfish of the genus Microglanis (Siluriformes: Pseudopimelodidae) from the upper rio Paraguay basin, Brazil

Authorship SCIMAGO INSTITUTIONS RANKINGS

ABSTRACT

A new species of Microglanis from upper rio Paraguay basin is described. The species differs from congeners by the following combination of characters: deeply forked caudal fin with pointed lobes, bifurcated hook between antrorse and retrorse hooks on anterior margin of pectoral-fin spine, lateral line relatively long, surpassing the vertical through end of dorsal fin but not reaching adipose fin, color pattern of dorsal region of head dark brown with a restrict thin light area between anterior nostril and eye, broad light stripe on supraoccipital region.

Keywords: Microglanis carlae; Microglanis cottoides; Multivariate morphometrics; Pantanal; Systematics

	Holotype	Min-Max	Mean±SD
Standard length	33.0	19.5-33.0	25.4±6.0
Proportion of standard length
Head length	28.4	26.5-29.3	28.0±1.0
Pelvic fin length	17.7	17.7-20.0	19.1±1.0
Dorsal-fin spine length	15.2	15.1-17.8	16.1±1.1
Pectoral-fin spine length	17.3	17.3-23.4	19.3±2.2
Posterior cleithral process length	14.3	9.4-14.3	11.9±1.8
Predorsal length	38.2	38.0-39.5	38.6±0.7
Prepelvic length	52.3	48.2-56.7	51.8±3.0
Preanal length	51.6	51.6-74.5	68.8±8.6
Caudal peduncle depth	10.6	10.6-12.9	11.5±0.9
Caudal peduncle length	12.7	12.7-18.6	15.3±2.1
Body width	29.2	27.3-31.1	29.2±1.7
Body depth at dorsal fin	17.8	17.8-26.7	20.1±3.3
Dorsal-fin base length	14.8	9.1-15.4	12.6±2.5
Adipose-fin base length	19.2	15.0-19.8	18.0±1.8
Anal-fin base length	12.5	9.9-13.1	11.4±1.3
Proportion of head length
Head depth	42.5	40.8-47.5	44.3±2.6
Interorbital width	44.1	44.1-51.2	46.4±2.7
Orbital diameter	14.3	8.5-14.3	10.6±2.0
Snout length	38.5	37.5-45.8	40.8±3.0
Mouth width	72.0	61.5-72.0	65.8±3.9
Maxillary-barbel length	92.8	92.8-146.1	118.3±17.4

	PC1	ShearedPC2	ShearedPC3
Standard length	0.195001	-0.008698	0.090347
Head length	0.212373	0.049486	0.045401
Interorbital width	0.197606	-0.018352	-0.033466
Orbital diameter	0.229321	-0.606059	-0.129629
Snout length	0.196460	0.152083	0.052126
Mouth width	0.217175	0.039774	0.049849
Maxillary barbel length	0.161459	-0.036518	0.140108
Pelvic fin length	0.195257	-0.055775	0.146366
Dorsal-fin spine length	0.216646	0.075786	0.154311
Pectoral-fin spine length	0.247000	-0.078143	0.166862
Posterior cleithral process length	0.305656	-0.145145	-0.341022
Predorsal length	0.195277	0.033412	0.086692
Prepelvic length	0.205904	0.019946	0.119410
Preanal length	0.233464	0.567386	-0.192885
Caudal peduncle depth	0.204813	0.211335	0.151192
Caudal peduncle length	0.167568	0.123586	0.033589
Body width	0.208917	0.056911	0.312646
Dorsal-fin base length	0.278154	-0.222623	0.092792
Adipose-fin base length	0.294856	0.254592	-0.636464
Anal-fin base length	0.246763	-0.260195	-0.408984
Eigenvalue	0.319	-0.012	-0.009
Percentage of total variance	90,52	3,36	2,42

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Sociedade Brasileira de Ictiologia Neotropical Ichthyology, Núcleo de Pesquisas em Limnologia, Ictiologia e Aquicultura, Universidade Estadual de Maringá., Av. Colombo, 5790, 87020-900, Phone number: +55 44-3011-4632 - Maringá - PR - Brazil
E-mail: neoichth@nupelia.uem.br

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