Comprehensive Description

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Rhadinoloricaria Isbruecker & Nijssen, 1974 ZBK .

Type species: Loricaria macromystax Guenther , 1869 ZBK .

Holotype : BMNH 1869.5.21.8 , Peru , Amazon River .

Gender: feminine.

This monotypic genus is distributed in the upper Amazon and Orinoco River basins, Essequibo, and Tocantins drainages. Although poorly known and uncommon in collections, Rhadinoloricaria ZBK is known to occur over sandy substrates. Ecological and behavioral data are unavailable. Most studies of Rhadinoloricaria ZBK are based on the holotype, which is in a poor state of preservation (particularly its mouth, which is one of the most important features for the study of this group). The holotype is an adult with complete abdominal plate cover; smaller specimens have incomplete abdominal plate cover forming a double median row of platelets. This feature, which is also observed in Apistoloricaria ZBK , Crossoloricaria ZBK , and one species of Dasyloricaria ZBK , could reflect a common developmental pattern of abdominal plates among these taxa. Consequently, its use as a diagnostic feature should be rejected (see Crossoloricaria ZBK above).

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Source: Plazi.org

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