78 



U.S. NATIONAL MUSEUM BULLETIN 2 88 



1920. Engystoma ovale concolor. — Miranda-Ribeiro, 1920a, p. 284 (type locality, 



Ypiranga) ; 1926, p. 184. 

 1920. Engystoma ovale lineala. — Miranda-Ribeiro, 1920a, p. 2S4 (type locality, 



R. da Serra, Sao Paulo). 

 1920. Engystoma ovale caesarii. — Miranda-Ribeiro, 1920a, p. 284 (type localities, 



Piquete, Os Perus, Alto da Serra [Sao Paulo], Cubatao [Santos], and 



Ypiranga) . 

 1920. Engystoma caesarii mottae Miranda-Ribeiro (nom. nud.), 1920a, p. 284 



(type locality, Sao Paulo), 1926, p. 194. 

 1922. Gastrophryne ovale, — Ruthven, 1922, p. 51. 



1926. Engystoma ovalis. — Nieden, 1926, p. 66. 



1927. Elachistocleis ovale ovale. — Parker, 1927a, p. 4. 



1929. Elachistocleis ovale.— Mertens, 1929, p. 286.— Dunn, 1931, p. 416. 



1930. Elachistocleis ovalis. — Mertens, 1930, p. 163.— Crawford, 1931, p. 38. 



Parker, 1934, p. 121.— Myers, 1942, p. 155.— Dunn, 1944, p. 524; 1949, 

 p. 13.— Carvalho, 1954, p. 15.— Rivero, 1961, p. 177; 1964a, p. 304.— 

 Gorham, 1963, p. 26. 



Diagnosis. — A microhylid with the tympanum concealed, clavicles 

 and procoracoids present but short and curved, posterior portion of 

 the prevomer absent, palatine bones absent, and snout very pointed. 



The presence of clavicles and procoracoids separates Elachistocleis 

 ovalis from species in the genera Ctenophryne and Glossostoma, while 

 the concealed tympanum and the fact that the clavicles and pro- 

 coracoids are short and strongly curved separate it from species of 

 Otophryne. From Relictivomer pearsei it may be distinguished by having 

 the belly dark with isolated light spots on the anterior face of the 



Figure 2. — Elachistocleis ovalis, FM 266 (same size). 



