Crephelochares abnormalis, is a species of water scavenger beetle found in Cambodia, Sri Lanka, Taiwan, Thailand, Vietnam, Ryukyu Islands and Indonesia: Borneo, Java, Sulawesi, Sumatra.

[1][2][3][4][5] The species was originally described by David Sharp in 1890 under the genus Philydrus.

[6] It was transferred to the genus Chasmogenus when Chasmogenus was considered a subgenus of the genus Helochares and a synonym of Crephelochares.

Additional details about the taxonomic history of Chasmogenus and Crephelochares can be found in Girón and Short (2021).

[7] The species is closely related to Chasmogenus orbus, only can be separated by features of the aedeagus: parameres without or with small subapical tooth, where the apex is broadened inwards.