| Characidae (Characins; tetras), subfamily: Stevardiinae |
| 6.13 cm SL (male/unsexed) |
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benthopelagic; freshwater |
| South America: Northwestern portions of the Río La Plata basin in Bolivia. |
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Dorsal soft rays (total): 10-10. Acrobrycon ortii is distinguished from A. ipanquianus by having the following characters: 19-21 anal-fin rays (vs. 23-27); body depth at the dorsal-fin origin 22.8-37.4% of SL (vs. 49.0-51.2% SL); and the caudal peduncle length relative to the body depth at the dorsal-fin origin 160-230% (vs. 240-440%). It can be diagnosed from A. starnesi in having 19-21 branched anal-fin rays (vs. 22-26), 53-58 perforated lateral-line scales (vs. 61-66), 19-20 horizontal scales rows around the caudal peduncle (vs. 22-26), body depth at the dorsal-fin origin relative to the least interorbital width 90-120% (vs. 70-80%), body depth at the dorsal-fin origin relative to the anal-fin base length 70-90% (vs. 100-120%), and the horizontal eye diameter relative to the least interorbital width 90-110% (vs. 70-80%) (Ref. 94771).
Description: dorsal-fin rays ii, 8; anal-fin rays ii or iv, 19-21; pectoral-fin rays i-ii, 9-11; pelvic-fin rays ii, 6 (Ref. 94771). |
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Near Threatened (NT); Date assessed: 28 October 2020 (B1a) Ref. (130435)
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| harmless |
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