Rodriguezia Bott, 1969

Souza-Carvalho, Edvanda A., Magalhães, Célio, Carvalho, Fabrício L. & Mantelatto, Fernando L., 2025, Systematics of Neotropical freshwater crabs Trichodactylinae based on multi-genes and morphological data: new tribe and new combinations, Arthropod Systematics & Phylogeny 83, pp. 315-329 : 315-329

Genus Rodriguezia Bott, 1969

Trichodactylus ( Trichodactylus) — Pretzmann 1968: 70 [part.].

Trichodactylus ( Rodriguezia) Bott, 1969: 25 [part.].

Trichodactylus — Holthuis 1986: 614 (in list) [part]. — Guinot 1988: 19 [part]. — Morrone and Lopretto 1996: 71 [part].

Rodriguezia — Rodríguez 1992: 62. — Sternberg 1997: 55 (in tab.), 58 (in fig.) [part]. — Villalobos-Hiriart et al. 1993: 284. — Álvarez et al. 1996: 129. — Magalhães and Türkay 1996 a a: 67 (in list), 71 (in key), 72. — Ng et al. 2008: 188 (in list). — De Grave et al. 2009: 42. — Álvarez et al. 2011: 276. — Magalhães and Türkay 2012: 34. — Alvarez and Villalobos 2018: 138 . — Rogers et al. 2020: 942 (in key).

Type species.

Trichodactylus villalobosi Rodríguez & Manrique, 1967 , by original designation.

Diagnosis.

Carapace: lateral margin devoid of teeth. Efferent branchial channel: aperture with yugal lateral lobe absent. Pleon: pleonal somites free. Telson (male): subtriangular; anterior margin nearly as broad as posterior margin of pleonal somite VI. G 1: simple, nearly straight; distal half subcylindrical, with weakly developed lobes on ventrolateral surface; distal opening wide, subcircular, apex symmetrical, situated terminally. G 2: shorter than G 1; apex lanceolate or subtriangular. Small-sized species (up to 30 mm CW).

Distribution.

Atlantic drainage in southern Mexico.

Composition.

Rodriguezia villalobosi ( Rodríguez & Manrique, 1967) ; Rodriguezia mensabak ( Cottarelli & Argano, 1977) ; Rodriguezia adani Alvarez & Villalobos, 2018 .

Remarks.

Rodriguezia was previously described as a subgenus of Trichodactylus by Bott (1969) and later elevated to generic status by Rodríguez (1992). This genus is found only in the Atlantic drainage of southern Mexico and comprises three species as listed above. Rodriguezia villalobosi and R. mensabak are known only from their holotypes. Rodriguezia adani and R. mensabak are stygobitic species and exhibit morphological adaptations associated with cave life, such as the absence of eyes, a reduced ocular peduncle, and elongated, slender legs ( Cottarelli and Argano, 1977; Alvarez and Villalobos, 2018).