D (Declining) - Populations appear less numerous today. 



PER (Peripheral) - At the edge of their range in Texas. 



IUCN International Union for Conservation of Nature and Natural Resources. 

 1966, 1968, 1972. Red data book. 3 vols. Morges, Switzerland. 



E (Endangered) - In immediate danger of extinction. 



R (Rare) - Not in immediate danger of extinction, but occurring in such 

 small numbers and/or in such a restricted or specialized habitat that 

 it could quickly disappear. Also includes V (Vulnerable) . 



D (Depleted) - Although still occurring in numbers adequate for survival, 

 the species has been heavily depleted and continues to decline at a rate 

 which gives cause for serious concern. 



SU (Indeterminant) - Apparently in danger, but insufficient data 'avail- 

 able. 



OP (Out of Danger) - Not defined. 



SEWS Southeastern Section of The Wildlife Society. 1974. Endangered species 

 workshop. Tallahassee, Florida. 



E (Endangered) , T (Threatened) , SU (Status Undetermined) , SC (Special 

 Concern)" , PER (Peripheral ) , EXTINCT - Not defined. 



AFS Miller, R. R. 1972. Threatened freshwater fishes of the United States. 

 Trans. American Fish. Soc, 101(2) :239-252. 



E (Endangered) - Actively threatened with extinction; continued survival 

 unlikely without implementation of special protective measures. 



R (Rare) - Not under immediate threat of extinction but occurring in 

 such small numbers and/or in such a restricted or specialized habitat 

 that it could quickly disappear. Requires careful watching. 



D (Depleted) - Although still occurring in numbers adequate for sur- 

 vival , the species has been heavily depleted and continues to decline 

 at a rate substantially greater than can be sustained. 



SU (Indeterminant) - Apparently threatened but insufficient data pres- 

 ently available on which to base a reliable assessment of status. 



SSAR Ashton, Ray E. 1976. Endangered and threatened amphibians and reptiles 

 in the United States. Soc. Study Amphib. Rept., Misc. Publ . , Herpetol . 

 Circ. 5. 65 pp. 



Taxa are classified with respect to their status in each State. The 

 State abbreviation follows the classification on the table. 



E (Endangered) - A taxon that has become reduced in numbers throughout 

 its range (or had its habitat reduced) to such a point that reproductive 

 populations are extremely small or vulnerable to extirpation. 



