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Xenurolebias tupinikin Gomes, Sarmento-Soares, Martins-Pinheiro & Leite, 2025 |
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photo by
Gomes, B.P. et al., 2025 |
| Family: | Rivulidae (Rivulines), subfamily: Cynolebiinae | |||
| Max. size: | 2.39 cm SL (male/unsexed) | |||
| Environment: | benthopelagic; freshwater | |||
| Distribution: | South America: Brazil. | |||
| Diagnosis: | Dorsal soft rays (total): 12-17; Anal soft rays: 21-23. This species is distinguished from its congeners by the following set of characters: adult males presenting in life a dark blotch overlapping the median portion of the last stripe on the caudal peduncle; dorsal and anal fin borders with a black outline; body depth of 25.9-27.9 in SL; caudal fin in males with 5-6 bars; male head depth 64.5-76.9% of HL; and absence of yellow spots on the distal half of the dorsal fin in males (Ref 138058). | |||
| Biology: | This species inhabits an isolated pool, spanning roughly 2 km² and densely covered with emergent vegetation dominated by grasses and ferns. Its substrate is composed of a mixture of emergent plants, decomposing plant debris, and sand (Ref. 138058). | |||
| IUCN Red List Status: | Not Evaluated (N.E.) Ref. (130435) | |||
| Threat to humans: | harmless | |||