Acanthicus hystrix
| Acanthicus hystrix | |
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| From the Xingu River (Altamira, Pará, Brazil) | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Actinopterygii |
| Order: | Siluriformes |
| Family: | Loricariidae |
| Genus: | Acanthicus |
| Species: | A. hystrix
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| Binomial name | |
| Acanthicus hystrix | |
| Synonyms | |
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Acanthicus hystrix, the lyre-tail pleco,[2] is a species of armored catfish native to the Amazon, Tocantins–Araguaia and Orinoco basins.[1] It is typically found at various depths on a rock or rock–gravel bottom in the main channel of rivers in places with moderate to strong current,[1] although it also occurs in slow currents.[2] The species is occasionally seen in the aquarium trade, but its adult size and territorially aggressive behavior means that a very large tank is required.[2]
Appearance
It grows to 62.8 cm (2.06 ft) in standard length,[1] but may possibly reach 100 cm (3.3 ft).[2] Its color ranges from medium-brown to near-black (especially those from the Madeira, Branco and Xingu rivers are dark), and the underparts often have a vermiculated pattern.[1] Some of the variants are commonly considered as separate, undescribed species in the aquarium trade (e.g., L193 from the Orinoco basin and L407 from the Branco basin; in the L-number system), but there is extensive overlap in the morphometrics of the different populations.[1] Unlike the polka dot lyre-tail pleco (A. adonis), A. hystrix never has white spots.[1] Adults males are especially spiny with extensive odontodes on the cheeks and opercle.[1]
References
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