Abstract (en):
We describe a new species, Apistogramma megaptera (Perciformes: Cichlidae) that occurs in the upper Orinoco River Basin, in the Inírida, Atabapo and Mavaca rivers of Venezuela and Colombia. This species is characterized by a deep body and a sexual dimorphism expressed in the different shape of the dorsal and caudal fins of males and females, as well as color pattern. Other diagnostic features that differentiate it from other species from Orinoco with crossbars on the caudal fin (Apistogramma iniridae, A. velifera and A. inornata) are: anal fin with marginal black stripe; dorsal fin with a thin marginal black line; infraorbital band wide, its width equal to the pupil; these characters are not present in the above mentioned species. The males reach a larger size (58.7 mm LS) than females (39 mm LS). The pigmentation in the form of crossbars on the tail fin is the character that distinguishes it from other species in the Orinoco River Basin that have immaculate caudal fin (Apistogramma alacrina, A. hoignei, A. hongsloi, A. guttata, A. macmasteri and A. viejita).
Abstract (es):
Se describe una nueva especie, Apistogramma megaptera (Perciformes: Cichlidae), distribuida en la cuenca alta del Orinoco (ríos Inírida, Atabapo y Mavaca) de Venezuela y Colombia. Esta especie se caracteriza por presentar un cuerpo elevado y dimorfismo sexual marcado, expresado en la forma de las aletas (dorsal y caudal) de los machos y hembras, así como en el patrón de coloración. Otros caracteres diagnósticos que la diferencian de las demás especies orinoquenses con barras transversales en la aleta caudal (Apistogramma iniridae, A. velifera y A. inornata), incluyen: aleta anal con franja negra marginal; aleta dorsal con presencia de una fina línea negra marginal y una banda infraorbital gruesa, cuyo ancho es igual al de la pupila. Estos caracteres están ausentes en las otras especies descritas. Los machos alcanzan una mayor talla (58.7 mm LE) que las hembras (39 mm LE). Respecto a las especies restantes en la cuenca del Orinoco que presentan aleta caudal inmaculada (Apistogramma alacrina, A. hoignei, A. hongsloi, A. guttata, A. macmasteri y A. viejita), la pigmentación en forma de barras transversales en la aleta caudal es el carácter que diferencia a A. megaptera.
Keywords:
<em>Apistogramma megaptera<em> sp. nov., Taxonomía, Ríos Inírida, Atabapo y Mavaca (es)
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How to Cite
Mesa Salazar, L. M., & Lasso, C. A. (2011). <em>Apistogramma megaptera<em> (Perciformes: Cichlidae), una nueva especie para la cuenca del Orinoco. Biota Colombiana, 12(1). Retrieved from https://revistas.humboldt.org.co/index.php/biota/article/view/241
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