Exostoma effrenum Ng & Vidthayanon, 2014

Family:  Sisoridae (Sisorid catfishes), subfamily: Glyptosterninae
Max. size:  6.5 cm SL (male/unsexed)
Environment:  benthopelagic; freshwater
Distribution:  Asia: Thailand.
Diagnosis:  Distinguished from its congeners by the following characters: eye diameter 11.5-15.0% HL; head width 18.5-19.8% SL; body depth at anus 10.5-12.4% SL; length of adipose-fin base 25.8-29.0% SL; adipose fin distinctly separate from upper procurrent caudal-fin rays; caudal peduncle length 20.5-21.3% SL, depth 5.1-7.0% SL; caudal fin forked; preanal vertebrae 21-22 (Ref. 97386).
Biology: 
IUCN Red List Status: Not Evaluated (N.E.) Ref. (130435)
Threat to humans:  harmless
Country info:  Type locality, upper reaches of the Ping River (one of two main tributaries of the Chao Phraya River) drainage in northwestern Thailand, NIFI 4955 (holotype of Exostoma effrenum, 5.13 cm SL), Found in the upper reaches of the Ping River (one of two main tributaries of the Chao Phraya River) drainage in northwestern Thailand (Ref. 97386).


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