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Mitsuhiro Iwamoto (2)

Description: This species is distinguished by the following characters: maxillary barbel extending beyond the pectoral-fin base; teeth few in both jaws (1-2 in premaxilla; 4-6 in dentary); edge of lips with barbelets, surface of lips with papillae and with one thick barbelet behind premaxillae and other two barbelets next to each pre-maxillae; in the holotype the barbelet behind premaxillae ramifies into two conical arms with equal size, while in paratypes this thick barbelet is not ramified; differs from all its congeners by the presence of a unique pattern of the buccal ornamentation, with numerous elongated smooth papillae in irregular rows on lower lip (vs. papillae not elongated; differs from Rhadinoloricaria macromystax, R. stewarti and R. listrorhinos by having fewer premaxillary teeth, 1-2 (vs. 4-6 in macromystax, stewarti, and 5-6 in listrorhinos), and by having a triangular-shaped head in dorsal view (vs. spatula-shaped head); differs from R. rhami by maxillary barbel reaching the middle of the pectoral fin (vs. maxillary barbel not reaching the gill opening), (Crispim-Rodrigues et al 2023). Etymology: The genus name Cheilonimata: Cheilonimata is derived from the Greek, Cheilos meaning lip and nimátia or nimata meaning threads or filaments, alluding to the cylindrical, elongated, unbranched and fleshy barblets observed over lower lip surface. Gender feminine. The specific name papillosa: Name from Latin word 'papillosa'” referring to numerous elongated papillae on the lower lip of specimens examined. Remarks: Still found on some online searches as the junior synonym Rhadinoloricaria papillosa.

None

Rhadinoloricaria papillosa

Loricariidae

Brazil: Lower Rio Negro.

7.5cm. (3ins)

24-27°c (75-81°f)

6.5-7.2.

Crispim-Rodrigues, J. L., M. J. Bernt, B. T. Waltz, G. S. C. Silva, R. C. Benine, C. Oliveira, R. Covain and F. F. Rox, 2023. A new species of mailed catfish of genus Rhadinoloricaria (Siluriformes: Loricariidae: Loricariinae) from Rio Negro basin, Brazil. J. Fish Biol.
Froese, R. and D. Pauly. Editors. 2024. FishBase. World Wide Web electronic publication. www.fishbase.org, ( 02/2024 ).
Provenzano, F. 2023 (11 July). A new genus and species of whiptail armored catfish (Siluriformes: Loricariinae) from southern Venezuela. Zootaxa 5315 (no. 4): 315-328. [Author seen as Provenzano-Rizzi.].