A new species of Poptella (Characiformes: Characidae: Stethaprioninae) from the Rio Juma, Rio Madeira basin, Brazil

A new species of Poptella is described from the Río Putumayo, Upper Río Amazon basin, Peru. The new species is distinguished from congeners by having a dense field of dark chromatophores homogeneously spread over the posterior half of the body, posterior humeral blotch extending to three to four horizontal scale rows below the lateral line, and a higher number of branched dorsal-fin rays. The new species can be readily distinguished from P. paraguayensis by having a comparatively shorter predorsal spine.

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“…Poptella sp. : Garcia‐Ayala & Benine, 2019: 7 (comparative material from Peru).…”

Section: Resultsmentioning

confidence: 99%

“…Counts and measurements follow Sidlauskas et al . (2011) and Garcia‐Ayala and Benine (2019). We also added five measures as proposed by Fink and Weitzman (1974): length of pectoral, pelvic, dorsal and anal fins, and distance between eye and dorsal‐fin origin.…”

Section: Methodsmentioning

confidence: 99%

Poptella fuscata, a new Stethaprionini from the upper Amazon basin, Peru (Characiformes: Characidae)

Garcia‐Ayala

Benine

2021

Journal of Fish Biology

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The monophyly of Crenuchinae and description of two new species ofPoecilocharax(Teleostei: Crenuchidae) based on phenotypic and genotypic evidence

Ohara

Pastana

Camelier

2022

Zoological Journal of the Linnean Society

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Crenuchinae is a subfamily of the fish family Crenuchidae distributed in the Amazon Basin with pronounced sexual dimorphism and exuberant colour patterns. Recent fieldwork in the tributaries of the Rio Aripuanã drainage, a large tributary of the Rio Madeira (Amazon Basin), resulted in the discovery of two distinctive, undescribed species of the crenuchin genus Poecilocharax, which are formally described herein, combining morphological and molecular data. These are the first representatives of Crenuchinae discovered after a gap of 57 years and the first records of Poecilocharax from the tributaries of the right bank of the Rio Amazonas draining the Brazilian crystalline shield. Based on a taxonomic review including all species of the subfamily, we provide an expanded morphological diagnosis for Crenuchinae. This now includes characteristics related to the lateral-line canals of head and body, the number of dorsal-fin rays and sexually dimorphic traits. In addition, we review previous characteristics used to diagnose Crenuchus and Poecilocharax, providing comments on their polarity and distribution across the subfamily. A dichotomous key is provided for the first time for species of Crenuchinae.

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GBIF custom download for research into locational uncertainty in the world's preserved specimens collections

2021

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A new species of Poptella (Characiformes: Characidae: Stethaprioninae) from the Rio Juma, Rio Madeira basin, Brazil

Cited by 933 publications

References 9 publications

Poptella fuscata, a new Stethaprionini from the upper Amazon basin, Peru (Characiformes: Characidae)

Poptella fuscata, a new Stethaprionini from the upper Amazon basin, Peru (Characiformes: Characidae)

The monophyly of Crenuchinae and description of two new species ofPoecilocharax(Teleostei: Crenuchidae) based on phenotypic and genotypic evidence

GBIF custom download for research into locational uncertainty in the world's preserved specimens collections

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