Four-digit Toad

morphology

The following is the description of Atelophryne minuta by Boulenger (1906), which was synonymized with Didynamipus sjostedti by Mertens (1965): Snout is obtusely pointed, prominent, obliquely truncate, and as long as the eye. Canthus rostralis is angular, and the loreal region is vertical. Interorbital space is broader than the upper eyelid. Tympanum is hidden. Fingers and toes are obtuse. The third finger is twice as long as second. The first and fourth fingers and toes are rudimentary, and fifth toe absent.The third toe is two and a half times as long as the second. A very slight rudiment of webbing is present between the toes. Subarticular tubercles are very large, but feebly prominent. Two obtuse metatarsal tubercles are present. The tarso-metatarsal articulation reaches the tip of the snout, or between the eye and the tip of the snout. The dorsum exhibits small smooth warts above, and the ventral skin is granular. Parotoids are absent. Dorsum is brown, with dark and lighter marblings. A dark streak is present under the canthus rostralis, sometimes continuing through the temporal region and along the side of the body, with or without a lighter streak above it. Venter is d

African Amphibians

size

The specimen examined by Boulenger (1906) in the description Atelophryne minuta was 20 mm from snout to vent.

African Amphibians

discussion

COMMENTS. — The distribution of this poorly known species has been recently revised by Gonwouo et al. (2013), who also provided insights on its natural history, stating that its reproductive mode is direct development. Our record from southern Bioko expands the distribution range of this species southwards. No phylogeographic studies have been performed including this monotypic taxon. The synonym Atelophryne minutus Boulenger, 1906, described from Bioko, represents an available name if future work confirms the specific distinctiveness of insular populations. SPECIMENS EXAMINED. — Nine specimens. From Belebu to Ureca, 3 ° 24 ʹ 25.81 ” N, 8 ° 33 ʹ 3.23 ” E, 19 November 2003 (MNCN 48947 – 48954, 46872).

Synopsis of the Amphibians of Equatorial Guinea based upon the Authors’ Field Work and Spanish Natural History Collections

distribution

DISTRIBUTION. — This species occurs both in continental Africa, where it extends from Cameroon (see Gonwouo et al. 2013) to Nigeria (Onadeko et al. 2010), and on Bioko, where it was reported from Basilé by Boulenger (1906 a). Since then, no additional records have been published for this country. We found an additional population from south Bioko province, located in the surroundings of Caldera de Luba (Map 10 B).

Synopsis of the Amphibians of Equatorial Guinea based upon the Authors’ Field Work and Spanish Natural History Collections