Hyloxalus nexipus (Frost, 1986)
© 2010 Tiffany Kosch (1 of 3)
A tadpole in Stage 37 has a body length of 9.2 mm and a total length of 30.5. The body is ovoid and wider than high. The snout is bluntly rounded in dorsal view and rounded in profile. The large eyes are situated and directed dorsolaterally and are not visible from below. The spiracle is sinistral with a short tube attached to the body for its entire length; the spiracular opening is directed posterodorsally well below the midline at about two-thirds of the length of the body. The cloacal tube is short, dextral, and attached to the ventral fin. The caudal musculature is robust, about equal in height on the proximal third of the tail, and gradually diminishes to a pointed terminus. The dorsal fin originates on the base of the caudal musculature, attains its greatest height at midlength of the tail, and gradually diminishes to an acutely rounded tip. The ventral fin originates on the body wall and is about equal in height throughout its length. The oral disc is directed anteroventrally; the median two-thirds of the anterior labium is bare, and elsewhere the labia have a single row of subconical marginal papillae. A few small, rounded papillae are present in the shallow, lateral labial folds.. The jaw sheaths are moderately slender and coarsely serrate; the anterior sheath forms a broad arch, and the posterior sheath is broadly V-shaped. The labial tooth row formula is 2(1)/3; the anterior rows are slightly longer than the posterior rows. The body is dark brown with tan dorsolateral stripes in the largest individuals; the tail is tan with brown flecks.
Distribution and Habitat
Country distribution from AmphibiaWeb's database: Ecuador, Peru
Life History, Abundance, Activity, and Special Behaviors
Coloma, L. A. (1995). Ecuadorian Frogs of the Genus Colostethus (Anura: Dendrobatidae). Museum of Natural History, University of Kansas, Lawrence, Kansas.
Duellman, W. E. (2004). ''Frogs of the genus Colostethus (Anura; Dendrobatidae) in the Andes of northern Peru.'' Scientific Papers of the Natural History Museum, University of Kansas, 35, 1-49.
Frost, D. R. (1986). ''A new Colostethus (Anura: Dendrobatidae) from Ecuador.'' Proceedings of the Biological Society of Washington, 99, 214-217.
Originally submitted by: William Duellman (first posted 2004-12-13)
Edited by: Kellie Whittaker (2007-12-03)
Species Account Citation: AmphibiaWeb 2007 Hyloxalus nexipus <https://amphibiaweb.org/species/1590> University of California, Berkeley, CA, USA. Accessed Jan 27, 2023.
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Citation: AmphibiaWeb. 2023. <https://amphibiaweb.org> University of California, Berkeley, CA, USA. Accessed 27 Jan 2023.
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