A new species of Characidium Reinhardt (Characiformes: Crenuchidae) from the Río Huallaga, central Peruvian Amazon, with a review of secondary sexual characters in the genus

A new species of Characidium Reinhardt (Characiformes: Crenuchidae) from the Río Huallaga, central Peruvian Amazon, with a review of secondary sexual characters in the genus

Characidium pumarinri n. sp. is described from the affluents of Río Huallaga, a tributary of Río Marañón that drains the eastern slopes of the Andes, in the Peruvian Amazon. The new species has a deep body (24–31% in LS), 11–17 well‐marked dark bars and remarkable sexual dimorphism related to colour...

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Veröffentlicht in:Journal of fish biology 2021-01, Vol.98 (1), p.178-188
Hauptverfasser: Teixeira, Tulio F., Melo, Marcelo R. S.
Format: Artikel
Sprache:eng
Schlagworte:
Amazon Basin
Animals
Characidium
Characiformes - anatomy & histology
Characiformes - classification
Colour
colour pattern
Female
Fins
Male
Marañón River
New species
Peru
Pigmentation - physiology
Rivers
Secondary sexual characters
Sex Characteristics
Sexual dimorphism
South‐American darters
Species Specificity
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Beschreibung
Zusammenfassung:Characidium pumarinri n. sp. is described from the affluents of Río Huallaga, a tributary of Río Marañón that drains the eastern slopes of the Andes, in the Peruvian Amazon. The new species has a deep body (24–31% in LS), 11–17 well‐marked dark bars and remarkable sexual dimorphism related to colour pattern, in which males have darker anal, dorsal, pectoral and pelvic fins than females. C. pumarinri resembles some species allocated in Clade C4, mainly by having a high number of transversal bars and a deep body. In addition, a thorough review and further descriptions of the secondary sexual characteristics in Characidium are provided.
ISSN:0022-1112
1095-8649
DOI:10.1111/jfb.14568