Cheiragonus (subgenus of Hypsagonus) Herzenstein [S. M.] 1890:118 Masc. Hypsagonus gradiens Herzenstein 1890. Type by original designation (also monotypic). Objectively invalid; preoccupied by Cheiragonus Bethold in Latreille 1827 in Decapoda (not researched). •Synonym of Hypsagonus Gill 1861 -- (Lindberg & Krasyukova 1987:295 [ref. 15964], Kanayama 1991:12 [ref. 19261], Parin et al. 2002:S97 [ref. 28300], Sheiko 1993:74 [ref. 21227], Sheiko & Mecklenburg 2004:3 [ref. 27591], Parin et al. 2014:288 [ref. 33547]). 1°Homonym. Current status: Synonym of Hypsagonus Gill 1861. Agonidae: Hypsagoninae.