Английская Википедия:Hemibrycon sanjuanensis

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Hemibrycon sanjuanensis is a species of characin from the upper San Juan River, Colombia.[1]

Etymology

It takes its name from the San Juan River, where specimens were collected.[1]

Description

Individuals range between Шаблон:Convert in length. The body is slender and long, with a short, compressed face and flexible lips. In an example of sexual dimorphism, the rays of males' pelvic and anal fins are lined with small hooks.[1]

General coloration is a dark brownish-yellow, with a dark stripe running from directly behind the gills to the caudal peduncle. The ventral surface is light yellow. The dorsum and fins are patterned with melanophores. A reddish spot can be observed on the ventral part of the base of the caudal fin.[1]

Range and habitat

H. sanjuanensis is believed to be endemic to the upper San Juan River in Colombia. Specimens were recovered from clear, fast-flowing streams with sandy or rocky bottoms.[1]

Diet

The species is insectivorous. Among other things, it has been known to eat water scavenger beetles, black flies, flesh flies, damselflies, predaceous diving beetles, caddisflies, nematodes, and isopods.[1]

References

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