trichospilus, Achirus Berg [C.] 1895:130 [Anales del Museo Nacional de Historia Natural de Buenos Aires v. 4; ref. 14575] Entre-Ríos, Argentina and Río Negro, Mercedes, Uruguay. Syntypes: MACN (2); MHNM. Type catalog: Loureiro et al. 2016:413 [ref. 35150]. Appeared as Achirus richospulus in Serrano 1929:6 [ref. 34188]. •Synonym of Catathyridium jenynsii (Günther 1862) -- (Ramos in Reis et al. 2003:668 [ref. 27061], Litz & Koerber 2014:36 [ref. 33622], Mirande & Koerber 2015:59 [ref. 35117], Koerber et al. 2017:82 [ref. 35267]). Current status: Synonym of Catathyridium jenynsii (Günther 1862). Achiridae. Habitat: freshwater.