Revalidation and redescription of Steindachnerina nigrotaenia and redescription of S. insculpta (Characiformes: Curimatidae)

Britski, Heraldo A.; Melo, Bruno F.; Vari, Richard P.; Oliveira, Claudio

doi:10.1590/1982-0224-20180076

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Original article • Neotrop. ichthyol. 17 (1) • 2019 • https://doi.org/10.1590/1982-0224-20180076 copy

Revalidation and redescription of Steindachnerina nigrotaenia and redescription of S. insculpta (Characiformes: Curimatidae)

Authorship SCIMAGO INSTITUTIONS RANKINGS

ABSTRACT

Steindachnerina nigrotaenia is resurrected from the synonym of S. brevipinna and considered a valid species. The previous designation of the lectotype of S. nigrotaenia is considered invalid and a new lectotype is designated herein. Steindachnerina nigrotaenia and S. insculpta are redescribed based on type specimens and on additional material from the rio Paraguai and the upper rio Paraná basins, respectively. The two species can be separated by the number of scales of the lateral line and of the transverse series and by phylogenetic analyses of molecular data.

Keywords:
Ostariophysi; Neotropical fishes; Systematics; Taxonomy

Taxon	Voucher	Specimen	Locality	City, State	Country	Genbank
Steindachnerina brevipinna	LBP 6690	32153	Rio Paraná	Marilena, Paraná	Brazil	GU701503
Steindachnerina brevipinna	LBP 6690	32154	Rio Paraná	Marilena, Paraná	Brazil	GU701502
Steindachnerina brevipinna	LBP 6690	32155	Rio Paraná	Marilena, Paraná	Brazil	GU701501
Steindachnerina brevipinna	LBP 6690	32156	Rio Paraná	Marilena, Paraná	Brazil	GU701505
Steindachnerina brevipinna	LBP 6690	32157	Rio Paraná	Marilena, Paraná	Brazil	GU701504
Steindachnerina insculpta	LBP 3192	19389	Rio Tietê, Rio Paraná	Conchas, São Paulo	Brazil	JN989237
Steindachnerina insculpta	LBP 3192	19390	Rio Tietê, Rio Paraná	Conchas, São Paulo	Brazil	JN989238
Steindachnerina insculpta	LBP 5207	26343	Rio Paraná	Porto Rico, Paraná	Brazil	JN989236
Steindachnerina insculpta	LBP 6671	32081	Rio Paraná	Marilena, Paraná	Brazil	JN989239
Steindachnerina insculpta	LBP 19770	32158	Rio Paraná	Marilena, Paraná	Brazil	GU701506
Steindachnerina nigrotaenia	LBP 5636	27395	Rio Paraguai	Cuiabá, Mato Grosso	Brazil	MK495705
Steindachnerina nigrotaenia	LBP 8573	43355	Rio Paraguai	Barra do Bugres, Mato Grosso	Brazil	MK495709
Steindachnerina nigrotaenia	LBP 9818	45230	Rio Paraguai	Miranda, Mato Grosso do Sul	Brazil	MK495701
Steindachnerina nigrotaenia	LBP 9818	45231	Rio Paraguai	Miranda, Mato Grosso do Sul	Brazil	MK495706
Steindachnerina nigrotaenia	LBP 9818	45232	Rio Paraguai	Miranda, Mato Grosso do Sul	Brazil	MK495702
Steindachnerina nigrotaenia	LBP 9818	45233	Rio Paraguai	Miranda, Mato Grosso do Sul	Brazil	MK495703
Steindachnerina nigrotaenia	LBP 9818	45234	Rio Paraguai	Miranda, Mato Grosso do Sul	Brazil	MK495707
Steindachnerina nigrotaenia	LBP 9862	45408	Rio Paraguai	Miranda, Mato Grosso do Sul	Brazil	MK495704
Steindachnerina elegans	LBP 8272	38329	Rio São Francisco	Jaíba, Minas Gerais	Brazil	MK495708

	Steindachnerina nigrotaenia					Steindachnerina insculpta
	Lectotype	N	Range	Mean	SD	Paratype	N	Range	Mean	SD
Standard length (mm)	43.5	44	37.0-90.3	63.4	-	105.0	78	42.6-108.1	75.6	-
Percentages of standard length
Body depth	26.5	44	25.0-33.8	28.8	1.5	29.5	78	25.6-34.1	30.1	1.7
Caudal peduncle depth	11.0	44	10.3-11.7	11.0	0.3	11.7	78	10.8-12.4	11.7	0.4
Head length	32.0	44	25.7-32.5	29.0	1.7	18.9	78	25.6-30.2	28.1	0.8
Predorsal distance	47.2	44	44.3-49.7	46.8	1.2	46.8	78	43.3-49.7	46.2	1.2
Prepelvic distance	51.9	44	48.8-55.4	52.4	1.4	54.9	78	48.8-58.0	52.1	1.6
Pectoral-fin length	15.2	44	15.0-20.0	18.1	0.9	17.9	78	15.6-19.8	18.0	0.9
Pelvic-fin length	19.9	44	18.0-22.3	19.7	0.9	19.6	78	15.5-21.8	19.0	1.2
Percentages of head length
Eye diameter	32.4	44	27.6-34.9	30.5	1.8	27.7	78	26.3-33.5	29.8	1.7
Snout length	34.5	44	30.1-35-6	32.9	1.3	35.1	78	29.7-38.9	34.1	1.7
Interorbital distance	33.1	44	31.7-43.2	38.0	2.2	39.7	78	38.3-44.8	41.0	1.8

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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[1] Edited by

Paulo Lucinda