A new species of <i>Aphanotorulus</i> (Siluriformes: Loricariidae) from the rio Aripuanã basin, Brazil

Oliveira, Andreza S.; Py-Daniel, Lúcia Rapp; Zawadzki, Cláudio H.

doi:10.1590/1982-0224-20160034

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ARTICLES • Neotrop. ichthyol. 15 (01) • 2017 • https://doi.org/10.1590/1982-0224-20160034 copy

A new species of Aphanotorulus (Siluriformes: Loricariidae) from the rio Aripuanã basin, Brazil

Authorship SCIMAGO INSTITUTIONS RANKINGS

ABSTRACT

The cis-Andean genus Aphanotorulus was recently revised and comprises six valid species: A. ammophilus, A. emarginatus, A. gomesi, A. horridus, A. phrixosoma and A. unicolor. Herein, a new species is described from tributaries of the rio Aripuanã basin, in Amazonas and Mato Grosso states, Brazil. The new species is easily distinguished from congeners by its color pattern: caudal fin with upper lobe mostly hyaline with dark spots along rays and membranes, and lower lobe red and without dark spots; and absence of dark spots in the lateral series of mid-ventral plates.

Keywords:
Amazon basin; Fishes; Hypostominae; Taxonomy

	Holotype	N	Range	Mean/SD
Standard length (mm)	200.9	62	72.4 - 240.5
Percents of standard length
Head length	30.8	62	26.5 - 33.7	29.6 ± 1.5
Predorsal length	36.9	62	34.3 - 39.5	36.3 ± 1.3
Snout length	17.3	62	16.1 - 20.2	18.3 ± 0.9
Cleithral width	26.5	62	23.5 - 27.8	25.3 ± 1.0
Dorsal-fin base length	22.2	62	19.3 - 23.9	21.5 ± 1.1
Interdorsal length	24.9	62	21.2 - 27.6	24.7 ± 1.4
Caudal-peduncle length	36.8	62	32.2 - 37.9	36.0 ± 1.2
Caudal-peduncle depth	7.9	62	6.9 - 9.0	7.5 ± 0.3
Dorsal-fin spine length	28.3	61	24.2 - 32.4	28.4 ± 1.9
Pectoral-fin spine length	24.6	62	21.6 - 28.4	25.1 ± 1.5
Pelvic-fin spine length	21.5	62	18.9 - 23.4	21.5 ± 1.1
Thoracic length	24.5	62	20.3 - 25.6	22.6 ± 1.2
Abdominal length	22.3	62	18.2 - 22.3	19.8 ± 0.8
Upper caudal-fin unbrached ray length	26.3	55	17.6 - 41.7	29.8 ± 5.3
Lower caudal-fin unbranched ray length	31.7	54	23.7 - 44.8	35.1 ± 4.7
Percents of head length
Head depth	53.2	62	44.3 - 59.1	51.5 ± 2.8
Cleithral width	86.3	62	79.5 - 95.9	85.5 ± 2.9
Snout length	56.1	62	54.9 - 72.3	61.8 ± 2.8
Orbital diameter	18.5	62	15.1 - 22.1	18.3 ± 1.4
Interorbital width	37.9	62	33.6 - 41.1	37.3 ± 1.4
Interdorsal length	80.9	62	64.8 - 103.0	83.9 ± 8.2
Premaxillary length	13.8	62	13.0 - 17.8	14.7 ± 1.1
Dentary length	12.9	62	11.4 - 16.8	13.8 ± 1.2
Lip width	45.6	62	37.2 - 52.8	44.7 ± 3.3
Lower-lip length	13.8	62	9.7 - 18.2	13.9 ± 2.0
Barbel length	14.8	61	6.7 - 16.7	11.6 ± 2.1
Counts					Mode
Median plate series	29	62	28 - 30	28
Plates limiting supraoccipital	3	62	4 - 6	4
Plates between dorsal and adipose fin	9	62	8 - 10	9
Dorsal plates below dorsal-fin base	7	62	7 - 8	7
Premaxillary teeth	57	62	33 - 57	45
Dentary teeth	54	62	31 - 58	44

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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