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Mitsuhiro Iwamoto (2)

Abstract: Acestridium gymnogaster and A. scutatum are described as new from small tributaries to the middle Rio Madeira, Amazonas, Brazil. Acestridium gymnogaster is most similar to A. discus from which it differs in the number of medial unpaired predorsal plates, the arrangement of chromatophores in predorsal area, and the absence of contact midventrally between the lateral abdominal plates. Acestridium scutatum is most similar to A. triplax from which it differs in having a longer snout and by the shape of the preanal plate (Roberto E. Reis, Pablo Lehmann A., 2009). Aquarium Care: Will need a fairly strong current in the aquarium. Not the easiest to care for so really a catfish for the more experienced Loricariid keeper, so would be better in a species tank on their own. Diet: Fine Vegetarian foods especially algae and small meaty foods such as brine shrimp nauplii. They rarely sit on the substrate but on leaf stalks and branches so they are especially difficult to feed. Etymology: The genus name Acestridium: –idium, Latin diminutive connoting resemblance: akéstra, darning needle, presumably referring to long spines on tip of snout of A. discus The specific name gymnogaster: gymnós, bare or naked; gast?r, belly or stomach, referring to naked area of skin between anterior lateral abdominal plates.

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Loricariidae

South America: Small tributaries of the middle Madeira River, Amazonas State, Brazil.

6.0cm. (2½ins)

25-29°c (77-85°f.)

6.5-7.2.

Froese, R. and D. Pauly. Editors. 2024. FishBase. World Wide Web electronic publication. www.fishbase.org, ( 02/2024 ).
Reis, R.E. and P. Lehmann A., 2009. Two new species of Acestridium Haseman, 1911 (Loricariidae: Hypoptopomatinae) from the Rio Madeira Basin, Brazil. Copeia 2009(3):446-452.