A Name for the Species of Allobates (Anura: Dendrobatoidea: Aromobatidae) from the Magdalena Valley of Colombia
We describe a new species of Allobates from the Magdalena Valley in Colombia. The new species and its sister species, A. talamancae, are the only two species of Allobates known to occur west of the Andes. The new species differs from A. talamancae in being smaller, possessing a diffuse pale oblique lateral stripe, and exhibiting strong swelling of finger III in adult males. Tadpoles also differ in the relative size of anterior and posterior labial papillae; in the new species anterior papillae are conspicuously larger than posterior papillae, whereas in A. talamancae they are subequal in size. Allobates talamancae and the new species are allopatric. Among the cis-Andean species of Allobates, the new species most resembles A. melanolaemus, which also possesses a diffuse pale oblique lateral stripe and a solid black throat in adult males, but from which it differs in being smaller and adult males having finger III strongly swollen and solid black pigmentation covering the chest and most of the belly. Se describe una nueva especie de Allobates del Valle del Magdalena en Colombia. Esta especie y su especie hermana, A. talamancae, son las únicas dos especies de Allobates que ocurren al occidente de los Andes. La nueva especie difiere de A. talamancae por ser más pequeña, poseer una difusa franja oblicualateral pálida, y tener el dedo III de la mano en los machos adultos fuertemente ensanchado. Además, las larvas difieren en el tamaño relativo de las papilas del labio anterior y posterior. Entre las especies cis-andinas de Allobates, la más parecida es A. melanolaemus, con la cual comparte la difusa franja oblicualateral pálida y la garganta negra en los machos adultos. La nueva especie se diferencia de A. melanolaemus por su menor tamaño y porque los machos adultos exhiben el dedo III de la mano fuertemente ensanchado y la pigmentación del pecho y del abdomen negra.Abstract
Resumen
Palmar view of the hand of adult male holotype MUJ 3520 (hand length 3.8 mm) of Allobates niputidea. Note the strong preaxial swelling of finger III.
Plantar view of the foot of adult male MUJ 3544 (foot length 7.0 mm) of Allobates niputidea.
Dorsal (A) and lateral (B) view of adult female MUJ 3529 (SVL = 17.3 mm) of Allobates niputidea. Note the diffuse pale oblique lateral stripe extending from the groin area in (B).
Ventral views of adults showing sexual dimorphism in coloration of Allobates niputidea. (A) Adult male holotype MUJ 3520 (SVL = 16.7 mm). (B) Adult female MUJ 3529 (SVL = 17.3 mm).
Stage 25 larva of Allobates niputidea taken from the back of female nurse from MUJ 3534. Upper left: Dorsal view. Upper right: Lateral (sinistral) view. Lower: Mouth. Upper scale bar = 1 mm. Lower scale bar = 0.25 mm.
Map of central Colombia (see upper left for context) showing the known localities (triangles) of Allobates niputidea. Gray lines indicate 500 m contour. Black lines indicate departmental borders; names are given for departments that include A. niputidea localities. All localities occur below 350 m in the Magdalena Valley. The open triangle indicates the type locality.
Summary of the phylogeny proposed by Grant et al. (2006) and the distribution of Allobates and its sister group (Aromobatinae) in relation to the Andes. Dendrobatidae and Anomaloglossinae occur on both sides of the Andes.
Contributor Notes
Section editor: M. J. Lannoo.