| Family: |
Characidae (Characins; tetras), subfamily: Stethaprioninae |
| Max. size: |
6.1 cm SL (male/unsexed) |
| Environment: |
benthopelagic; freshwater |
| Distribution: |
Central America: endemic to springs at Tamazulapan, Oaxaca, Balsas drainage, Pacific versant of Mexico. |
| Diagnosis: |
Dorsal soft rays (total): 9-9; Anal soft rays: 20-22; Vertebrae: 32-33. Astyanax salvatoris is distinguished from other congeners in Oaxaca by following characters: anal-fin rays 20-22 (vs. 21-26); total gill rakers, mean 17 (vs. mean 22 or more in A. finitimus); anterior fontanel sharp-tipped (vs. blunt), long (vs. shorter in A. finitimus); in dorsal view, supraoccipital short, wide-based (vs. long, narrow-based in A. aeneus); 4 maxillary teeth, 2 larger followed by 2 smaller (vs. 1-3, all about same size); epibranchial III distal segment straight (vs. curved in A. finitimus); preopercular ventral rim, convex (vs. straight in A. aeneus); and predorsal elements irregularly expanded (Ref. 118583). |
| Biology: |
|
| IUCN Red List Status: |
Critically Endangered (CR); Date assessed: 10 September 2018 (B1ab(iii)+2ab(iii)) Ref. (130435)
|
| Threat to humans: |
harmless |
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