KEYS TO 1-ROGS AND TOADS 



12. Hyla versicolor versicolor (Le Contc) (Common Tree Toad) 



Distribution: eastern half of Oklahoma. Habitat: trees ot hoth woodland 

 and savannahs. Abundant. Breeding: from April to August (concentrated in 

 May) in pools and creek-overflows of its habitat. Eggs: brown and cream, 

 produced at surface, attached lightly to vegetation or, rarely floating freely. 

 Tadpoles: young tadpoles easily confused with those of Pseudacris strecf(eri 

 and Ps. triseriata and, morphologically, with those of Ps. clarl{ii but they are 

 not likely to be found with the last mentioned (a grassland rather than a 

 woodland form). Older tadpoles are absolutely distinguished from all others 

 known in Oklahoma by the red or red and black mottled tail fin. Shy and 

 fast at all ages and older ones have a tendency to float near surface. Descrip- 

 tions: eggs, Wright and Wright (1942); tadpoles, Wright (1929); adults, 

 Wright and Wright (1942), Walker (1946). 



13. Mierohyla carolinensis carolinensis (Holbrook) (Southern Narrow 



Mouth Toad)-" 

 Distribution: eastern Oklahoma only. Known at present from Delaware, 

 eastern Cherokee, Adair, central Latimer, LeFlore and McCurtain counties. 

 Habitat: imperfectly known, so far observed only in grassy valleys and in 

 edges of woodlands along streams. Breeding: in grassy pools of shallow water 

 after rains in late spring and summer. Breeding adults are shy, the most dif- 

 ficult to catch by hand of any Oklahoma form. Eggs: small, black and white, 

 floating singly or in small groups on the surface. Tadpoles: Hat, quick moving. 

 Descriptions: eggs and adults, Wright and Wright (1942); tadpoles, Wright 

 1929).-i 



14. Microhyla carolinensis olivacea (Hallowell) (Northern Narrow Mouth 



Toad) 

 Distribution: probably state-wide except as replaced in eastern Oklahoma 

 by A/, c. carolinensis (q.v.). Intergrades with latter at least in Latimer County 

 (Hecht and Matalas, 1946) and both species occur in Cherokee County 

 ( Bragg, 1947). Unknown and uncertain in the Panhandle. Habitat: abundant 

 in all ecological zones except lower levels of large flood plains, at least in 

 central Oklahoma. Breeding: from about May 1 throughout summer in tem- 

 porary pools after rains of some extent (0.5 in. upward) but only at relatively 

 high temperatures. Eggs and tadpoles: similar to the Southern Narrow Mouth 

 Toad (q.v.). Descriptions: eggs and adults, Wright and Wright (1942); tad- 

 poles, Wright (1929).-'' 



15. Pseudacris clarl^ii (Baird) (Spotted Chorus Frog) 



Distribution: approximately western two-thirds of Oklahoma, but east 



-"The older names, Gastrophrync ccirolincnsis and G. icxciisis ( ^olifdcca ) , are 

 used by some, including the author of the paper cited. 



-1 Many vernacular names are current for this animal. Inasmuch as Narrow Month 

 Toads is frequently used for the family Microhylidae of which at least three members of 

 the genus Microhyla and one of Hypopachus occur in the United States and adjacent north- 

 ern Mexico, the above is proposed exclusively for this subspecies, specifically to distinguish 

 it from its northern relative, M. c. oliiuuca which also occurs in Oklahoma. 



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