A new species of the armored catfish genus   <i>Pareiorhaphis</i> Miranda Ribeiro (Siluriformes: Loricariidae) from the rio Paraguaçu, Bahia State, northeastern Brazil

Pereira, Edson H. L.; Zanata, Angela M.

doi:10.1590/S1679-62252014000100003

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Article • Neotrop. ichthyol. 12 (01) • Jan-Mar 2014 • https://doi.org/10.1590/S1679-62252014000100003 linkcopy

A new species of the armored catfish genus Pareiorhaphis Miranda Ribeiro (Siluriformes: Loricariidae) from the rio Paraguaçu, Bahia State, northeastern Brazil

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Abstract

A new armored catfish species of the genus Pareiorhaphis is described from the middle and upper portions of rio Paraguaçu basin, coastal drainage of Bahia State, northeastern Brazil. The new species is readily distinguished from all its congeners by having two putative autapomorphies: (1) skin fold just posterior to each emergent tooth series of dentary formed by a single enlarged, flattened papilla, and (2) the midline of lower lip immediately behind the dentaries with small patch of distinct papillae arranged in a short median bump. In addition, the shallow caudal peduncle and comparatively lower number of teeth in each dentary also distinguishes the new species from all congeners. The new species is also compared to Pareiorhaphis bahianus, the geographically closest congener.

Cascudos; Chapada Diamantina; Neoplecostominae; Neoplecostomus ; Pareiorhaphis bahianus

	H	n	Low	High	Mean	SD
Standard length (mm)	76.9	33	45.5	82.1	65.1	-
Percents of standard length
Head length	34.9	33	31.4	36.2	34.0	1.25
Predorsal length	43.5	33	40.0	44.3	42.7	1.05
Postdorsal length	40.5	33	36.5	43.7	41.0	1.52
Preanal length	63.9	33	61.0	68.0	64.3	1.92
Preadipose length	80.1	33	77.6	82.4	80.2	1.10
Dorsal-fin spine length	21.0	33	19.3	22.8	21.1	0.80
Anal-fin unbranched ray length	14.1	33	11.9	15.0	13.4	0.77
Pectoral-fin spine length	17.4	33	16.4	21.7	18.9	1.27
Ventral-fin unbranched ray length	24.5	33	21.5	25.7	23.7	1.15
Upper principal caudal-fin ray	21.3	30	19.4	25.5	22.9	1.75
Lower principal caudal-fin ray	26.0	30	22.6	30.6	26.9	1.99
Adipose-fin spine length	8.9	33	7.1	10.2	9.0	0.73
Adipose to caudal fin distance	20.2	33	17.9	21.4	19.4	0.86
Trunk length	16.9	33	15.9	18.9	17.6	0.74
Abdominal length	22.7	33	21.3	24.8	22.9	0.85
Cleithral width	29.4	33	27.4	30.7	28.8	0.85
Body depth at dorsal-fin origin	17.4	33	14.0	18.9	16.6	1.37
Body width at dorsal-fin origin	21.2	33	19.1	24.7	22.1	1.42
Body width at anal-fin origin	14.1	31	12.2	15.4	14.0	0.82
Caudal peduncle length	34.9	33	33.4	39.4	36.2	1.56
Caudal peduncle depth	7.7	33	6.7	7.8	7.2	0.33
Caudal peduncle width	5.1	33	4.1	5.3	4.7	0.30
Percents of head length
Snout length	62.4	33	58.1	65.1	61.9	1.47
Orbital diameter	13.2	33	11.8	15.7	13.9	0.94
Interorbital width	26.3	33	25.2	29.8	27.7	1.27
Head depth	48.9	33	42.4	52.8	47.1	2.81
Mandibular ramus left	18.7	33	15.1	19.7	17.1	1.30
Mandibular ramus right	19.2	33	15.1	19.3	17.0	1.33
Counts
Premaxillary teeth left	40	30	23	40	30.8	4.39
Premaxillary teeth right	37	31	21	40	30.9	5.04
Dentary teeth left	32	30	20	38	26.9	4.85
Dentary teeth right	28	30	21	38	27.3	4.61
Plates in median lateral series left	27	33	23	27	25.0	1.02
Plates in median lateral series right	28	32	24	28	25.3	1.08
Plates at dorsal-fin base	6	33	5	7	6.0	0.50
Plates between dorsal and adipose	6	33	6	8	6.5	0.56
Plates between adipose and caudal	4	33	3	5	3.4	0.56
Plates at anal-fin base	2	33	2	3	2.5	0.51
Plates between anal and caudal fins	12	33	10	12	11.2	0.50
Preadipose azygous plates	2	33	2	3	2.3	0.48

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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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