New species of <i>Farlowella</i> (Siluriformes: Loricariidae) from the rio Tapajós basin, Pará, Brazil

A new species of stick-catfish Farlowella is described from streams of the lower rio Tapajós drainage, in Pará State, northern Brazil. The new species is distinguished from all congeners by a naked gular region (vs. gular region with plates) and from most congeners by the presence of five lateral series of plate rows on anterior region of body (vs. four). The new species shows variation in the series of abdominal plates and a discussion on the variation of abdominal plates within Farlowella is made and comments on synapomorphic characters in Farlowellini.

Keywords:
Amazon; Armored catfish; Biodiversity; Loricariinae; Taxonomy

Authorship

Manuela Dopazo

Conceptualization, Data curation, Formal analysis, Investigation, Methodology, Project administration, Software, Validation, Writing-original draft

Departamento de Vertebrados, Museu Nacional, Universidade Federal do Rio de Janeiro, Quinta da Boa Vista, 20940-040 Rio de Janeiro, RJ, Brazil. (MD) manueladopazoleao@gmail.com (corresponding author); (MRB) mrbritto2002@yahoo.com.br.Universidade Federal do Rio de JaneiroBrazilRio de Janeiro, RJ, BrazilDepartamento de Vertebrados, Museu Nacional, Universidade Federal do Rio de Janeiro, Quinta da Boa Vista, 20940-040 Rio de Janeiro, RJ, Brazil. (MD) manueladopazoleao@gmail.com (corresponding author); (MRB) mrbritto2002@yahoo.com.br.

https://orcid.org/0000-0002-7266-109X

Wolmar B. Wosiacki

Data curation, Formal analysis, Validation, Writing-review and editing

Museu Paraense Emílio Goeldi, Caixa Postal 399, 66040-170 Belém, PA, Brazil. (WBW) wolmar@museu-goeldi.br.Museu Paraense Emílio GoeldiBrazilBelém, PA, BrazilMuseu Paraense Emílio Goeldi, Caixa Postal 399, 66040-170 Belém, PA, Brazil. (WBW) wolmar@museu-goeldi.br.

https://orcid.org/0000-0002-4013-8501

Marcelo R. Britto

Conceptualization, Data curation, Formal analysis, Funding acquisition, Investigation, Methodology, Project administration, Validation, Writing-review and editing

https://orcid.org/0000-0002-0611-6923

Edited-by

Paulo Lucinda

Correspondence

Manuela Dopazo manueladopazoleao@gmail.com

Competing Interests

The author declares no competing interests.

Ethical Statement

Not applicable.

SCIMAGO INSTITUTIONS RANKINGS

Figures | Tables

Figures (6)
Tables (1)

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FIGURE 1 |
Additional measures used in this study. A. Minimum width of snout; B. Distance between cleithral processes; and C. Maximum width of snout.

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FIGURE 2 |
Dorsal, lateral and ventral view of Farlowella wuyjugu, holotype, 143.4 mm SL, MPEG 26178, Brazil, Pará State, Juruti municipality, igarapé Rio Branco, lower rio Tapajós, rio Amazon basin.

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FIGURE 3 |
Gular region and variation of abdominal plates in specimens, ventral view of Farlowella wuyjugu. A. MPEG 26178, 143.4 mm SL; B. INPA 59894, 128.9 mm SL; C. MPEG 12684, 125 mm SL.

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FIGURE 4 |
Caudal fin coloration of Farlowella wuyjugu. MPEG 31191, 119.9 mm SL.

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FIGURE 5 |
Geographic distribution of Farlowella wuyjugu in lower rio Tapajós. Star = holotype; circles = paratypes localities.

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FIGURE 6 |
Igarapé Rio Branco, type-locality of Farlowella wuyjugu.

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TABLE 1 |
Morphometrics of Farlowella wuyjugu, new species. Values as percents of standard length (SL) and head length (HL) for holotype and 38 paratypes. n = number of specimens, SD = Standard deviation.

FIGURE 1 | Additional measures used in this study. A. Minimum width of snout; B. Distance between cleithral processes; and C. Maximum width of snout.

FIGURE 2 | Dorsal, lateral and ventral view of Farlowella wuyjugu, holotype, 143.4 mm SL, MPEG 26178, Brazil, Pará State, Juruti municipality, igarapé Rio Branco, lower rio Tapajós, rio Amazon basin.

FIGURE 3 | Gular region and variation of abdominal plates in specimens, ventral view of Farlowella wuyjugu. A. MPEG 26178, 143.4 mm SL; B. INPA 59894, 128.9 mm SL; C. MPEG 12684, 125 mm SL.

FIGURE 4 | Caudal fin coloration of Farlowella wuyjugu. MPEG 31191, 119.9 mm SL.

FIGURE 5 | Geographic distribution of Farlowella wuyjugu in lower rio Tapajós. Star = holotype; circles = paratypes localities.

FIGURE 6 | Igarapé Rio Branco, type-locality of Farlowella wuyjugu.

TABLE 1 | Morphometrics of Farlowella wuyjugu, new species. Values as percents of standard length (SL) and head length (HL) for holotype and 38 paratypes. n = number of specimens, SD = Standard deviation.

	Holotype	n	Range	Mean	SD
Standard length (mm)	143.4	38	90.9–144.7	119.7	–
Percents of standard length
Head length	24.8	38	23.2–28.5	26.4	1.3
Body depth at dorsal-fin origin	3.5	38	3.1–4.4	4.0	0.3
Body width at dorsal-fin origin	4.5	38	4.3–5.5	4.9	0.3
Body width at anal-fin origin	4.4	38	4.4–5.7	4.9	0.3
Predorsal length	43.5	38	42.0–46.7	44.4	1.0
Postdorsal length	51.1	38	50.4–54.3	52.3	1.0
Postanal length	49.4	38	49.4–53.8	51.7	1.1
Prepelvic length	35.0	38	34.2–38.0	36.4	1.0
Distance from parieto-supraoccipital to dorsal fin	18.2	38	16.6–19.3	17.9	0.6
Caudal peduncle depth	1.5	38	0.8–1.6	1.3	0.2
Dorsal fin length	12.2	38	12.1–14.1	13.0	0.5
Pectoral fin length	9.4	38	8.6–10.7	9.4	0.5
Pelvic fin length	5.5	38	5.0–6.3	5.8	0.3
Anal fin length	11.5	38	11.1–13.6	12.1	0.5
Distance from pectoral fin origin to pelvic fin origin	10.9	38	10.9–13.3	12.3	0.5
Distance between cleithral processes	4.5	38	4.5–6.5	5.6	0.4
Percents of head length
Head width	24.4	38	19.6–27.7	23.6	1.7
Head depth	16.8	38	14.6–27.3	16.8	2.0
Snout-mouth length	44.2	38	31.1–47.1	39.4	3.9
Minimum width of snout	4.7	38	3.2–5.9	4.2	0.6
Maximum width of snout	13.6	38	9.9–38.3	13.0	4.3
Snout length	85.5	38	77.4–95.5	82.1	2.9
Eye diameter	5.8	38	3.6–5.8	4.5	0.5
Interorbital width	14.1	38	12.0–16.0	13.6	0.9
Postorbital head length	19.2	38	14.4–22.6	19.6	1.8
Internarial distance	5.3	38	4.1–5.7	4.9	0.4

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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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New species of <i>Farlowella</i> (Siluriformes: Loricariidae) from the rio Tapajós basin, Pará, Brazil

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[1] Edited-by

Paulo Lucinda