Chthonius C.L. Koch, 1843

Judson, Mark L. I., 2012, Nomenclatural problems associated with the generic names Obisium Leach, 1814, Blothrus Schiödte, 1847 and Neobisium Chamberlin, 1930 (Arachnida: Chelonethi), Zootaxa 3475, pp. 21-35 : 25

Synonymy between Chthonius C.L. Koch, 1843 and Obisium Leach, 1814

The genus Chthonius C.L. Koch, 1843 was created for Chelifer trombidioides Latreille, 1804 and Obisium orthodactylum Leach, 1817 , which Koch (1843) treated as separate species, even though they are objective synonyms ( Judson 1997). The type species of Chthonius was later designated as O. orthodactylum by Simon (1879), who also overlooked this synonymy. Chthonius is thus a junior objective synonym of Obisium Leach, 1814 , but remains the valid name of the genus because Obisium Leach, 1814 is a junior homonym of Obisium Illiger, 1798 .