Down arrow Cat-eLog Data Sheet
Scientific Name Avalithoxus jantjae  (Lujan, 2008)
Common Name
Type Locality Río Ventuari, above Tencua Falls 58 kilometers east-southeast of San Juan de Manapiare, ca. 5°02'N, 65°36'W, Amazonas, Venezuela.
Synonym(s) Lithoxus jantjae
Pronunciation AH vah lith OX uss. - yahnt jee
Etymology Avalithoxus is a portmanteau of the Latin word ava, meaning ‘grandmother’, and the genus name Lithoxus. It refers to both the apparently basal position of this lineage and the matronym of the type species, which honoured Jeanne Lujan, the author's mother. Matronym honoring the author's mother, nicknamed Jantje prior to her emigration from the Netherlands
Down arrow Species Information
Size 38mm or 1.5" SL. Find near, nearer or same sized spp.
Identification Avalithoxus can be distinguished from other species of Lithoxini by having 12 branched caudal fin rays (vs. 14 or 13), four branched anal-fin rays (vs. 5), five interdorsal plates (vs. 6 to 9), at most low hemispherical papillae around the oral disc margin (vs. digitate papillae), and a maximum of 25 hypertrophied cheek odontodes (mode, 18; range, 16–25) vs. a maximum of 21 (mode, 12; range, 5–21).

The only known species in Lithoxus with 12 caudal fin rays (others have 14)
Down arrow Habitat Information
Distribution Known only from rapids that extend for a few hundred meters upstream of Tencua Falls, the first major faunal barrier in the Ventuari River, a right bank tributary of the upper Orinoco in Amazonas State, Venezuela.
Orinoco, Upper Orinoco, Ventuari (click on these areas to find other species found there)

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IUCN Red List Category Not Evaluated
Down arrow Husbandry Information
Breeding Unreported.
Breeding Reports There is no breeding report.
Down arrow Further Information
Reference Neotropical Ichthyology v. 6 (no. 3), pp 414, Fig. 1.
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Last Update 2019 Oct 13 02:31 (species record created: 2009 Jan 04 04:52)