| Characidae (Characins; tetras), subfamily: Stethaprioninae |
| 7.49 cm SL (male/unsexed) |
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benthopelagic; freshwater |
| Central America: Río Acatlán in Puebla and Río Jía in Oaxaca, Mexico. |
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Dorsal soft rays (total): 10-10; Anal soft rays: 21-24; Vertebrae: 32-33. Astyanax acatlanensis is distinguished from its congeners in inland central Mexico by the following characters: supracephalic profile, usually concave (vs. usually convex); modally 12 (modally 11-11.5) predorsal scales; modally 15.5 or fewer scales around caudal peduncle (vs. modally 16 or more); 10 or more procurrent unsegmented caudal fin rays on dorsum (9 or fewer
in A. rioverde); head short, mean 23.8% SL (mean 24.6% or higher in A. mexicanus, A. rioverde and A. salvatoris); sides of anterior fontanel, straight (convex, in A. rioverde); ascending vs. descending arms of premaxilla, subequal (vs. dentigerous longer); infraorbital IV, square with projections (rectangular in A. rioverde); and opercle dorsal edge, convex (obtuse in A. rioverde and A. salvatoris) (Ref.118583). |
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Data deficient (DD); Date assessed: 07 September 2018 Ref. (130435)
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| harmless |
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