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Archolaemus santosi Vari, de Santana & Wosiacki, 2012 |
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photo by
de Santana, C.D. |
| Family: | Sternopygidae (Glass knifefishes) | |||
| Max. size: | 21.2 cm TL (male/unsexed) | |||
| Environment: | benthopelagic; freshwater | |||
| Distribution: | South America: Rio Jamari, Amazon basin, Brazil. | |||
| Diagnosis: | Anal soft rays: 204-221. Distinguished from other congeners by having the following combination of characters: the rictus falling short of the vertical through the posterior border of the posterior naris; depth of the caudal filament 6.7-9.1% CL; length of the caudal filament 14.4- 27.0% LEA; anteroposterior length of premaxilla equal to the transverse width; length of the posterior ceratohyal approximately the same length as the ventral hypohyal; length of the coronomeckelian bone less than 20% the length of Meckel’s cartilage; head length to the rear of the opercle 15.0-16.3% LEA; mouth width 7.0-10.3% HL; teeth on the dentary restricted to the anterior one-half or slightly more of the dorsal margin; presence of a narrow dark stripe along the lateral line and a broad band of dusky to dark pigmentation overlying the basal pterygiophores of the anal fin; 19-21 pectoral-fin rays; and 204-221 anal-fin rays (Ref. 93148). | |||
| Biology: | Found in rapids (Ref. 93148). | |||
| IUCN Red List Status: | Vulnerable (VU); Date assessed: 07 November 2018 (B1ab(iii)) Ref. (130435) | |||
| Threat to humans: | harmless | |||