Comprehensive DescriptionRead full entry
Cochranella mache males range from 22-24 mm in size while the female holotype collected was 28 mm. This species can be distinguished from others of the same genus by the following characteristics: (1) vomerine teeth present; (2) snout subacuminate when viewed dorsally and gradually inclined in lateral view; (3) eye diameter double the width of disc of Finger III; (4) tympanic annulus present; in some specimens, a weak supratympanic fold is present; (5) dorsal skin shagreened and covered with minute spinules and warts with protruding spicules, in breeding males but not in females; (6) dermal folds with white tubercles present on ventrolateral edges of finger IV, forearms, elbows, toe V, tarsi, and heels; both dermal folds and tubercles are less conspicuous on females; (7) large nuptial pad with concealed prepollex; (8) humeral spine lacking; (9) presence of white warts ornamenting cloaca; in males cloacal opening bordered laterally by n-shaped fold; in females cloacal skin flaps present but not n-shaped; (10) bones green in life; (11) hepatic peritoneum is clear or covered by small patches of white iridophores in contrast to most centrolenid species with hepatic iridophores which generally cover the entire surface; iridophores cover anterior third of parietal peritoneum, entire pericardium and visceral peritonea, and sometimes renal capsules; (12) liver with four lobe; (13) finger I greater or equal in length to finger II. Feet are webbed and hands are partially webbed (Cisneros-Heredia et al. 2008; Guayasamin and Bonaccorso 2004).
The coloration of this species is unique: dorsum and ventral surfaces of limbs are blue-green; small yellow spots on the dorsum; large dull yellow patch on top of head; white iris with fine black reticulation; narrow golden ringed pupil. Moreover, the chromatic scheme can change dramatically, to a completely light blue background color with bright orange spots; the head patch now bright yellow; the iris light lavender with dark lavender reticulations; and the pupillary ring becomes a less noticeable bluish white. In males, fingers I and II and toes I and II are entirely white, while on females, only the points of fingers I and II and toes I and II are white along with the margins of the webbing (Cisneros-Heredia et al. 2008; Guayasamin and Bonaccorso 2004).
The scientific name Cochranella mache refers to the type locality of the species, Montañas de Mache.