New species of <i>Leporinus</i> (Characiformes: Anostomidae) from the highlands of the Guiana Shield in Venezuela

Birindelli, José L. O.; Britski, Heraldo A.; Provenzano, Francisco

doi:10.1590/1982-0224-20190022

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Original article • Neotrop. ichthyol. 17 (2) • 2019 • https://doi.org/10.1590/1982-0224-20190022 linkcopy

New species of Leporinus (Characiformes: Anostomidae) from the highlands of the Guiana Shield in Venezuela

Authorship SCIMAGO INSTITUTIONS RANKINGS

ABSTRACT

A new species of Leporinus is described using morphological data and compared to all other species of the family. Specimens were illustrated using digital photograph, measured using digital calipers, and had teeth, scales, and fin rays counted under a stereomicroscope. The new species is distinguished from all other Anostomidae, except Anostomus anostomus, A. brevior, A. ternetzi, Hypomasticus despaxi, Leporinus arcus, and L. striatus, by having four dark longitudinal stripes on body. The new species is distinguished from aforementioned species by having terminal mouth with four teeth on the premaxilla, 12 series of scales around caudal peduncle, and 34 to 36 scales in the lateral line. The new species is remarkably similar to Leporinus arcus, which occurs on the opposite side of Guyana Shield highlands. The new species and L. arcus are possibly closely related to Leporinus gomesi, L. granti, L. lebaili, L. melanostictus, L. nijsseni, and L. santosi.

Keywords:
Anostomoidea; Phylogeny; South America; Systematics; Taxonomy

	Leporinus tepui, new species					Leporinus arcus
	n	Mean	Range	SD	Holotype	n	Mean	Range	SD	Holotype
Standard Length (mm)	27		29.6-143.7		143.7	18		36.4-308.5		189.8
Percentages of SL
Predorsal distance	16	51.0	46.9-55.2	2.13	47.7	10	48.3	46.4-52.3	1.74	46.5
Dorsal-fin origin to adipose-fin origin	8	38.5	37.5-39.9	0.85	38.1	9	39.3	37.4-41.5	1.45	39.8
Prepelvic distance	16	53.8	50.6-60.1	2.44	50.6	10	50.9	49.0-52.3	1.03	49.0
Body depth	16	31.3	25.0-33.5	2.08	30.4	10	29.9	27.4-32.5	1.44	27.4
Caudal peduncle length	16	12.0	10.7-13.4	0.67	10.9	10	10.9	10.2-11.9	0.55	10.3
Caudal peduncle depth	8	12.6	11.4-13.5	0.71	13.4	9	12.6	9.4-14.6	1.75	13.8
Anal-fin lobe length	16	17.7	10.8-20.1	2.15	16.3	10	15.8	14.6-18.0	0.97	15.4
Head length	16	29.3	24.7-31.8	1.83	24.7	10	25.9	24.0-28.1	1.52	24.0
Percentages of HL
Preopercle length	8	77.2	75.0-82.3	2.38	77.2	9	77.8	75.0-82.3	2.42	75.0
Snout length	16	38.1	33.6-42.9	2.63	39.7	10	39.9	35.8-41.9	1.89	40.0
Head depth	8	82.7	78.8-88.2	3.41	88.2	9	82.7	76.3-92.9	4.56	84.2
Eye diameter	16	30.9	23.1-35.4	2.90	23.1	10	23.0	15.8-28.4	4.48	22.2
Bony interorbital	16	37.7	35.4-41.3	1.93	37.5	10	41.2	36.8-47.9	3.19	43.7

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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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