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Acestrocephalus stigmatus Menezes, 2006 |
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photo by
Menezes, N.A. |
| Family: | Characidae (Characins; tetras), subfamily: Characinae | |||
| Max. size: | 13.5 cm TL (male/unsexed); max.weight: 45.0 g | |||
| Environment: | benthopelagic; freshwater | |||
| Distribution: | South America: Rio Tocantins, Rio das Mortes (tributary of Rio Araguaia) and Rio Xingu in Brazil. | |||
| Diagnosis: | Dorsal soft rays (total): 11-11; Anal soft rays: 33-35; Vertebrae: 38-39. Distinguished from all species of Acestrocephalusexcept Acestrocephalus boehlkei and Acestrocephalus maculosus by having a dark humeral blotch. Differs from Acestrocephalus boehlkei in having fewer anal-fin rays 29-31 (vs. 34-36) and fewer scale rows around caudal peduncle 22-23 (vs. 25); and from Acestrocephalus maculosus in having more anal-fin rays 29-31 (vs. 25-27). The muscular hiatus of the pseudotympanum in Acestrocephalus stigmatus is narrower than that of Acestrocephalus boehlkei, but much more developed than that of Acestrocephalus maculosus (Ref. 75890). Description: Dorsal fin ii,9; Anal fin iv,29-31; Pectoral fin i+13-14; Pelvic fin i+7 (Ref. 75890). | |||
| Biology: | ||||
| IUCN Red List Status: | Least Concern (LC); Date assessed: 07 November 2018 Ref. (130435) | |||
| Threat to humans: | harmless | |||