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Astyanax serratus Garavello & Sampaio, 2010 |
| Family: | Acestrorhamphidae (American tetras), subfamily: Acestrorhamphinae | |||
| Max. size: | 12 cm SL (male/unsexed) | |||
| Environment: | benthopelagic; freshwater | |||
| Distribution: | South America: Brazil. | |||
| Diagnosis: | Dorsal soft rays (total): 8-9; Anal soft rays: 16-20. This species can be distinguished from all its congeners from Iguaçu basin by this set of characters: infraorbital 3 narrow and deep but not in contact with preopercle, leaving a naked area approximately 1/5 of height between border and preopercle; premaxillary external series with 2-5, usually 4 tricuspid teeth; non-symphysial teeth in premaxillary internal series pentacuspid; maxillary with 0-4, usually 2 teeth; humeral spot rounded and dark, frequently with a weak and narrow vertical downward prolongation (Ref. 85756). | |||
| Biology: | ||||
| IUCN Red List Status: | Least Concern (LC); Date assessed: 07 November 2018 Ref. (130435) | |||
| Threat to humans: | harmless | |||