Species Description: Roedel M-O Doumbia J Johnson AT Hillers A 2009. A new small Arthroleptis (Amphibia: Anura: Arthroleptidae) from the Liberian part of Mount Nimba, West Africa. Zootaxa 2302: 19-30.
Smooth dorsal and ventral skin. The back has a fine vertebral skin raphe. Body shape is oval, slender and slightly elongated. Large eyes. Short snout which is rounded in dorsal view and almost spatulate in lateral view. Indistinct and rounded canthus rostralis with a slightly concave loreal region. Tympanum is small and indistinct. Males can be distinguished from females by a slightly longer third finger. No digital or inguinal spines are present. Fingers and toes lack webbing. The tips of both the fingers and toes are slightly expanded, but they do not form discs. Fingers have small round or ovoid subarticular tubercles. Hand has large and ovoid palmar and thenar tubercles. Foot lacks a tarsal tubercle, but have a slender and elongated internal metatarsal tubercle (no outer metatarsal tubercle was visible, but the specimen's feet were reported to be slightly dried) (Rodel et al. 2009).
In life, the dorsum is reddish brown, with a black interorbital marking on the head, posterior to which is a small black U-shape surrounding a gray spot, then two black comma-shaped marks, then followed by a black-bordered crown-shaped marking just below the scapular region, and a small black marking in the middle of the dorsum. Snout and upper eyelids are gray with black and brown mottling. Blackish loreal region. Mandible is blackish. Upper arms are reddish brown, with a darker base at the arm insertion, while the lower arms are nearly black except for lighter blotches on the elbow and near the hand. The ventral surfaces of the upper arms are dark brown. Hands and feet are gray. Upper legs are reddish brown with a single dark transverse bar and several irregular blackish spots; lower legs also have a single dark transverse bar but a reddish spot on the most distal third of the leg. The ventral surfaces of the upper legs are whitish and the ventral surfaces of the lower legs are dark brown. Flanks are blackish, with a dark pattern interrupted by a reddish brown stripe that runs from behind the scapular crown marking to the groin. Anterior to the groin area, there are more dark markings and inguinal bands. Throat is dark brown. Belly is gray. Reddish iris. (Rödel et al. 2009).
In preservative, the color appears a faded grayish brown, but the pattern is still distinguishable (Rödel et al. 2009).
Distribution and Habitat
Life History, Abundance, Activity, and Special Behaviors
Trends and Threats
The report of yet another new amphibian species from Mount Nimba, one of the most intensively herpetologically surveyed areas in West Africa, underscores how much work still remains to fully assess West African amphibian taxa. Mount Nimba has the highest diversity of amphibians known (67 species) in West Africa (Rödel et al. 2009).
Rodel, M., Doumbia, J., Johnson, A.T. and Hillers, A. (2009). ''A new small Arthroleptis (Amphibia: Anura: Arthroleptidae) from the Liberian part of Mount Nimba, West Africa.'' Zootaxa, 2302, 19-30.
Written by Stephanie Ung (stephanieung AT berkeley.edu), UC Berkeley
First submitted 2009-12-03
Edited by Kellie Whittaker (2009-12-03)
Species Account Citation: AmphibiaWeb 2009 Arthroleptis langeri <http://amphibiaweb.org/species/7399> University of California, Berkeley, CA, USA. Accessed Jul 5, 2020.
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Citation: AmphibiaWeb. 2020. <http://amphibiaweb.org> University of California, Berkeley, CA, USA. Accessed 5 Jul 2020.
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