Astyanax bacalarensis Schmitter-Soto, 2017
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Family:  Characidae (Characins), subfamily: Incertae sedis
Max. size:  9.48 cm SL (male/unsexed)
Environment:  benthopelagic
Distribution:  Central America: Quintana Roo, Caribbean versant of Yucatan Peninsula in Mexico, south to the Sittie River, Toledo district in Belize, west to Mop├ín in Guatemala.
Diagnosis:  Dorsal soft rays (total): 9-11; Anal soft rays: 21-27; Vertebrae: 32-33. Astyanax bacalarensis is distinguished from its congeners in the Yucatan by the following characters: anal fin origin never overlapping last dorsal-fin ray (always overlapping in A. altior); head length 28% SL or less (27% or more in A. altior); predorsal length, mean 50.4% SL (mean 53% or more in A. altior and A. angustifrons); mean distance between origins of pelvic and anal fins, 20.5% SL (vs. mean 19.3% or less); humeral spot rectangular-triangular to oval (P-shaped to indistinct in A. belizianus and A. brevimanus) (Ref. 118583).
Biology: 
IUCN Red List Status: Least Concern (LC); Date assessed: 09 September 2018 Ref. (120744)
Threat to humans:  harmless
Country info:   
 

Entered by: Torres, Armi G. - 24.09.18

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