A new species of the catfish <i>Neoplecostomus</i> (Loricariidae: Neoplecostominae) from a coastal drainage in southeastern Brazil

Cherobim, Arieli Matheus; Lazzarotto, Henrique; Langeani, Francisco

doi:10.1590/1982-0224-20160015

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ARTICLES • Neotrop. ichthyol. 14 (04) • 2016 • https://doi.org/10.1590/1982-0224-20160015 copy

A new species of the catfish Neoplecostomus (Loricariidae: Neoplecostominae) from a coastal drainage in southeastern Brazil

Authorship SCIMAGO INSTITUTIONS RANKINGS

ABSTRACT

A new species of loricariid catfish is described from the rio Perequê-Açú and surrounding basins, Parati, Rio de Janeiro State. The new species has the accessory process of ceratobranchial 1 more slender than the main body of the ceratobranchial, and a very large sesamoid ossification, markedly greater in size than the interhyal. Additionally, the new species presents a distinct dorsal color pattern consisting of a conspicuous horseshoe shaped light blotch with a central dark area posterior to the supraoccipital.

Keywords:
Cascudos; Neoplecostomus microps; Perequê-Açú; Siluriformes; Taxonomy

	H	n	Range	Mean	SD
Standard length	82.2	49	50.1 - 92.0	62.6	11.0
Percentage of standard length
Predorsal length	45.3	49	41.1 - 47.3	43.8	1.2
Head length	32.7	49	28.3 - 34.1	31.5	1.2
Head width	26.1	49	22.7 - 27.8	24.8	1.0
Cleithral width	27.9	49	23.8 - 29.1	26.1	1.1
Occipital-dorsal distance	13.8	49	11.0 - 14.3	13.0	0.9
Thoracic length	15.1	49	13.3 - 17.6	14.9	0.9
Interdorsal length	20.5	49	17.7 - 23.5	20.4	1.3
Caudal-peduncle length	28.9	49	27.7 - 32.6	30.5	1.2
Caudal-peduncle depth	8.4	49	7.1 - 9.1	8.1	0.4
Body depth	17.8	49	13.1 - 19.1	16.2	1.2
Preanal length	63.7	49	61.4 - 66.9	63.9	1.2
Percentage of head length
Head width	79.9	49	74.6 - 88.4	78.6	2.8
Head depth	51.9	49	44.2 - 56.2	49.7	2.8
Snout length	62.3	49	58.4 - 63.8	61.0	1.6
Orbital diameter	8.1	49	7.8 - 10.7	9.2	0.7
Interorbital width	29.8	49	27.6 - 31.9	29.9	1.0
Mandibullary width	15.3	49	13.9 - 21.9	17.1	1.7
Other percentages
Snout length/Orbital diameter	13.0	49	12.3 - 17.5	15.1	1.3
Interorbital lenght/Orbital diameter	27.2	49	25.8 - 35.9	30.8	2.4
Interorbital lenght/Mandibullary width	51.2	49	47.5 - 78.1	57.5	6.3
Predorsal length/First dorsal ray length	49.5	49	42.5 - 56.1	47.6	2.8
Caudal peduncle length/ Caudal peduncle depth	29.1	49	23.4 - 32.7	26.7	1.8
Pelvic-fin length/ Caudal peduncle depth	33.1	49	28.2 - 38.1	33.4	1.9
Lower cd spine/ Caudal peduncle depth	31.6	46	27.4 - 38.2	31.2	2.6
Counts				Mode
Lateral-line plates	33	49	29 - 34	31	1.5
Predorsal plates	4	49	3 - 6	4	0.6
Plates of dorsal-fin base	6	49	4 - 7	6	0.6
Plates between dorsal and caudal fin	17	49	16 - 19	17	0.9
Plates between adipose and caudal fin	8	49	7 - 9	8	0.7
Plates between anal and caudal fin	13	49	11 - 15	12	0.8
Premaxillary teeth	21	49	14 - 24	19	2.0
Dentary teeth	16	49	13 - 22	16	1.9
Dorsal lateral plate series	28	49	26 - 35	30	1.7
Mid-dorsal lateral plate series	24	49	24 - 30	25	1.7
Mid-ventral lateral plate series	24	49	23 - 29	24	1.7
Ventral lateral plate series	25	48	21 - 31	24	1.8

Taxon	N. microps Paraíba do Sul		N. microps Guapi-Açu	N. microps Macaé		N. paraty	N.paranensis
Haplotype	KU608295	KU608294	KU608296	KU608297	KU608298	KU550707	EU179800.1
N. microps Paraíba do Sul KU608294	0.15%	X
N. microps Guapi-Açu. KU608296	1.39%	1.54%	X
N. microps Macaé KU608297	1.87%	2.03%	2.36%	X
N. microps Macaé KU608298	2.04%	2.19%	2.52%	0.15%	X
N. paraty	2.04%	2.04%	2.52%	3.06%	3.22%	X
N. paranensis	8.29%	8.47%	8.88%	8.10%	8.30%	8.08%	X
N. ribeirensis	11.38%	11.57%	12.02%	11.21%	11.42%	12.04%	10.88%

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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