FROGS OF COLOMBIA — COCHRAN AND COIN 491 



Genus Trachyphrynus Goin and Cochran 



1963. Trachyphrynus Goin and Cochran, p. 502 (type species, Trachyphrynus 

 my erst) . 



Generic diagnosis. — A leptodactylid with T-shaped terminal 

 phalanges, a distinct tympanum, no vomerine teeth, and rounded 

 sacral diapophyses. 



The combination of T-shaped phalanges and no vomerine teeth 

 makes this genus readily separable from all forms except Crossodactylus 

 and Crossodactylodes . The presence of a tympanum distinguishes it at 

 once from Crossodactylodes. It differs from Crossodactylus, which is 

 perhaps its closest relative, in having tips of the digits simple rather 

 than furrowed above. It is not yet known if the males have the spines 

 at the base of the first finger as do the males of Crossodactylus. 



Trachyphrynus myersi Goin and Cochran 



Figure 46 



1963. Trachyphrynus myersi Goin and Cochran, p. 502, fig. 2 (type locality, 

 20 miles east of Pasto, Narino, Colombia). 



Description. — CAS 85177 (holotype), an adult female from 20 miles 

 east of Pasto, Narino, Colombia. No bony ridges on top of head; no 

 vomerine teeth; maxillary teeth weakly developed; tongue three- 

 fourths as wide as mouth opening, nearly circular, its posterior border 

 free and not indented; snout broadly rounded when viewed from 

 above, narrowly truncate in profile, the upper jaw extending slightly 

 beyond the lower. Nostrils lateral, strongly projecting, their distance 

 from end of snout about one-half their distance from eye. Canthus 

 rostralis appearing sharp because of a glandular ridge along it from 

 eyelid almost to nostril; loreal region flat, vertical, with the upper lip 

 flaring sharply below it. Eye large, prominent, its diameter nearly 

 as great as its distance from end of snout; interorbital diameter 1% 

 times that of upper eyelid, much greater than interval between the 

 nostrils. Tympanum distinct, its greatest diameter one-half that of 

 eye, separated from eye by an interval equal to one-half its own 

 diameter. Fingers fairly long, with disks on the three outer ones, the 

 inner finger not enlarged at tip, all with very faint lateral ridges, free, 

 first finger shorter than second, fourth longer than either and reaching 

 to base of penultimate phalanx of third, the disk of which covers 

 one-fourth the tympanum; an oval thumb pad present, and a cordi- 

 form palmar callus; metacarpal tubercles well developed. Toes long, 

 barely webbed at the base, third and fifth subequal, their disks 

 reaching to base of antepenultimate phalanx of fourth; disk of fourth 

 toe covering about one-third of tympanum, hence a trifle larger than 



