A new species of Knodus (Characiformes: Characidae), with deep genetic divergence, from the Mearim and Munim river basins, Northeastern Brazil, and evidence for hidden diversity in adjacent river basins

Aguiar, Rayane Gonçalves; Guimarães, Erick Cristofore; Brito, Pâmella Silva de; Santos, Jadson Pinheiro; Katz, Axel M.; Dias, Luiz Jorge B. da S.; Costa, Larissa Di Léo Nogueira; Ottoni, Felipe Polivanov

doi:10.1590/1982-0224-2021-0173

Cited by 5 publications

(2 citation statements)

References 52 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Biological collections where type specimens were deposited are LBP (Laboratório de Biologia e Genética de Peixes, UNESP, Botucatu, Brazil) and MNRJ (Museu Nacional, UFRJ, Rio de Janeiro, Brazil). Definitions of all other institutional abbreviations mentioned in this study may be found in Sabaj (2020) -with the exception of CICCAA (for this see Aguiar et al 2022).…”

Section: Morphological Datamentioning

confidence: 99%

Redefinition of Heptapterus (Heptapteridae) and description of Heptapterus carmelitanorum, a new species from the upper Paraná River basin in Brazil

Deprá¹,

Aguilera²,

Faustino‐Fuster³

et al. 2022

ZSE

Self Cite

View full text Add to dashboard Cite

A new diagnosis and a new classification of Heptapterus are provided and a new species, H. carmelitanorum, is described. Heptapterus is diagnosed by the following character combination: adipose fin confluent with the caudal fin; non-bifurcate caudal fin; anal-fin insertion posterior to vertical through adipose-fin insertion; 10–23 anal-fin rays; anal fin not confluent with caudal fin; and extremely elongate body, with a head length of 16.1–24.9%SL. Species included in Heptapterus are H. borodini, H. carmelitanorum, H. carnatus, H. exilis, H. hollandi, H. mandimbusu, H. mbya, H. mustelinus, H. ornaticeps, and H. qenqo. Some of the character states diagnosing H. carmelitanorum among its congeners are the anal-fin insertion less than one eye diameter posterior to a vertical through the adipose-fin insertion (vs. more than one eye diameter in all congeners); the isognathous mouth (vs. slightly to moderately retrognathous, except H. borodini); and the keel formed by ventral procurrent caudal-fin rays shallow, far from reaching anal-fin base (vs. keel formed by ventral procurrent caudal-fin rays deep, continuing almost to the anal-fin base, except in H. borodini and H. hollandi).

show abstract

Section: Morphological Datamentioning

confidence: 99%

Redefinition of Heptapterus (Heptapteridae) and description of Heptapterus carmelitanorum, a new species from the upper Paraná River basin in Brazil

Deprá¹,

Aguilera²,

Faustino‐Fuster³

et al. 2022

ZSE

Self Cite

View full text Add to dashboard Cite

show abstract

“…Therefore, as currently defined, Knodus comprises 40 valid species distributed throughout most cis‐Andean freshwater drainages in South America (Ferreira & Ohara, 2023; Fricke et al ., 2023). Despite the recent increase in alpha taxonomy knowledge of the genus, the real diversity of Knodus remains underestimated (Aguiar et al ., 2022; García‐Melo et al ., 2019).…”

Section: Introductionmentioning

confidence: 99%

Knodus borari, a new species from the lower Rio Tapajós basin (Characiformes: Characidae)

Silva-Oliveira

Canto

Ribeiro

2023

Journal of Fish Biology

View full text Add to dashboard Cite

A new species of Knodus from the Rio Cupari, a right‐bank tributary of the lower Rio Tapajós, is described. Among its congeners, the new species shares exclusively with K. figueiredoi the presence of only uni‐tricuspid teeth in the premaxilla, maxilla and dentary. Knodus borari differs from K. figueiredoi by the colour pattern and morphological characteristics. The new species is the fifth species of the genus described from the Rio Tapajós basin, and the second restricted to the lower portion of the basin. This is additional evidence that the lower Rio Tapajós basin is a region of ichthyofaunal endemism.

show abstract

Fish diversity in the rivers that drain the Baixada Maranhense and the Mearim basin in northeastern Brazil

Limeira-Filho,

Moraes,

Almeida

et al. 2023

Braz. J. Biol.

View full text Add to dashboard Cite

The Baixada Maranhense Environmental Protection Area of the Brazilian state of Maranhão encompasses a biologically rich region that includes the basins of four principal rivers, the Mearim, Pericumã, Pindaré, and Turiaçu, which form a complex of wetlands. The present study provides a comprehensive inventory of the fish fauna of the rivers that drain the Baixada Maranhense based on the identification of voucher specimens that were deposited in a scientific collection. Expeditions were conducted between 2014 and 2020. The inventory identified a total of 100 fish species representing 79 genera, 34 families, and 11 orders, which are found in both freshwater and estuarine environments. Six (Potamotrygon orbignyi, Leporinus piau, Moenkhausia loweae, Serrasalmus spilopleura, Pachypops fourcroi and Peckoltia greedoi) of the 100 taxa identified here are considered to be new records for one or more of the basins surveyed during this study, based on the existing data, while four – Colossoma macropomum, Megaleporinus macrocephalus, Cichla sp. and Cichla kelberi – are not native. The most speciose orders were the Siluriformes and Characiformes, while the most diverse families were the Loricariidae, Characidae, Auchenipteridae, Cichlidae, and Serrasalmidae. These data are consistent with the findings of most of the previous studies of freshwater ecosystems in the Neotropical region, in particular those of the rivers of Maranhão. The results of the present study represent an important advance in the understanding of the diversity of the fish fauna of the Mearim, Pericumã, Pindaré, and Turiaçu rivers, which are still poorly studied, and have likely had their diversity underestimated up to now.

show abstract

A new species of Knodus (Characiformes: Characidae), with deep genetic divergence, from the Mearim and Munim river basins, Northeastern Brazil, and evidence for hidden diversity in adjacent river basins

Cited by 5 publications

References 52 publications

Redefinition of Heptapterus (Heptapteridae) and description of Heptapterus carmelitanorum, a new species from the upper Paraná River basin in Brazil

Redefinition of Heptapterus (Heptapteridae) and description of Heptapterus carmelitanorum, a new species from the upper Paraná River basin in Brazil

Knodus borari, a new species from the lower Rio Tapajós basin (Characiformes: Characidae)

Fish diversity in the rivers that drain the Baixada Maranhense and the Mearim basin in northeastern Brazil

Contact Info

Product

Resources

About