Leptotocinclus Ctenistus (Leptotocinclus ctenistus) is a ray-finned fish. It inhabits freshwater waters in benthic environments. This species can reach a maximum total length of 3.1 cm. With a trophic level of 2.4, it is an omnivore, consuming both plant and animal matter.
Dorsal spines (total): 1; Dorsal soft rays (total): 7; Anal soft rays: 6; Vertebrae: 27. Leptotocinclus ctenistus can be diagnosed from its only congener L. madeirae by the presence of median series of abdominal plates, arranged in one single row (vs. median series of abdominal plates absent); and having 3-6 lateral abdominal plates (vs. 1-2, but one specimen with 3). It further differs by having larger size of preanal plate (7.0-12.0% SL vs. 1.5-6.4% SL) .: elongated.
Behavioural data for Leptotocinclus Ctenistus is currently being reviewed.
Freshwater; demersal. Tropical South America: Rio Solimões and rio Negro drainages in Brazil and Colombia.
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