Cardioglossa gracilis Boulenger, 1900
Original Published Description:
Rio Benito Long-fingered Frog (English)
The specific name 'gracilis' means slender in Latin.
The type specimen measured 37 mm from snout to vent (Boulenger, 1900).
Head is much depressed and slightly longer than broad. Snout is longer than the orbit, truncate at the end and scarcely projecting beyond the mouth. Canthus rostralis is distinct; loreal region is concave. Nostril is closer to the end of the snout than the eye. Eye is rather small. Interorbital space is much broader than the upper eyelid. Tymanum is very distinct, measuring two-thirds or three-fourths the diameter of the eye. Fingers and toes are long and slender, the tips dilated into small disks. Subarticular tubercles are small but very prominent. The first finger does not extend quite as far as second. A rather prominent, moderately large, oval inner metatarsal tubercle is present. The tibio-tarsal articulation reaches the tip of the snout or slightly beyond (Boulenger, 1900).
Dorsum and venter are dark brown. A black band, edged beneath with white, extends on each side from the nostril to halfway down the side of the body, passing through the eye and tympanum, and widening behind; this band is followed by a large black inguinal spot. Dark symmetrical markings are present on the limbs, those on the front and back of the thighs are black, edged with white. Ventral surfaces are spotted or marbled with white. Males have internal vocal sacs (Boulenger, 1900).
Omosternum has a slender bony style. Sternum is a small cartilaginous plate, without a bony style. Terminal phalanges are T-shaped (Boulenger, 1900).