Crephelochares abnormalis

Crephelochares abnormalis
	Dorsal view of Crephelochares abnormalis
Scientific classification
Kingdom:	Animalia
Phylum:	Arthropoda
Class:	Insecta
Order:	Coleoptera
Suborder:	Polyphaga
Superfamily:	Hydrophiloidea
Family:	Hydrophilidae
Subfamily:	Acidocerinae
Genus:	Crephelochares
Species:	C. abnormalis
Binomial name
	Crephelochares abnormalis; (Sharp, 1890)
Synonyms
	Philydrus abnormalis Sharp, 1890; Helochares regimbarti Knisch, 1924; Philhydrus nigritulus Régimbart, 1903; Phylhydrus ferrugatus Régimbart, 1903; Chasmogenus abnormalis (Sharp, 1890);

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]

Taxonomy

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]

Description

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. Median lobe gradually becomes narrow from apical quarter to apex and widely truncate apically.^[8]

References

^ Devi, M. Bhubaneshwari; Devi, O. Sandhyarani; Fikáček, Martin; Minoshima, Yûsuke N.; Wanghengbam, Leiphon (2016-07-27). "Redescription and lectotype designation of Chasmogenus abnormalis (Sharp), with notes on its distribution". Zootaxa. 4144 (2): 296–300. doi:10.11646/zootaxa.4144.2.12. PMID 27470857. Retrieved 2021-07-30.
^ Jia, Fenglong; Tang, Yu-dan (2018-02-19). "A faunistic study of genus Chasmogenus Sharp, 1882 of China (Coleoptera, Hydrophilidae)". ZooKeys (738): 59–66. doi:10.3897/zookeys.738.21711. PMC 5904443. PMID 29670421. Retrieved 2021-07-30.
^ Girón, J. C.; Short, A. E. Z. (2016). "Exploring morphological characters associated with habitat transitions in water scavenger beetles (Coleoptera: Hydrophilidae: Acidocerinae)". researchgate.net. Retrieved 2021-07-30.
^ Hebauer, F.; Ryndevich, S. K. (2005). "New data on the distribution of Old World Hydrophilidae (Coleoptera)" (PDF). Acta Coleopterologica. 21 (1): 43–51.
^ "Chasmogenus abnormalis (Sharp, 1890)". www.gbif.org. Retrieved 2021-07-30.
^ Sharp, D. (1890). "On some aquatic Coleoptera from Ceylon". Transactions of the Entomological Society of London. 1890 (2): 339–359. doi:10.1111/j.1365-2311.1890.tb03026.x.
^ Girón, Jennifer C.; Short, Andrew Edward Z. (2021-06-18). "The Acidocerinae (Coleoptera, Hydrophilidae): taxonomy, classification, and catalog of species". ZooKeys (1045): 1–236. doi:10.3897/zookeys.1045.63810. ISSN 1313-2970. PMC 8233300. PMID 34228772.
^ Jia, Fenglong; Tang, Yu-dan (2018-02-19). "A faunistic study of genus Chasmogenus Sharp, 1882 of China (Coleoptera, Hydrophilidae)". ZooKeys (738): 59–66. doi:10.3897/zookeys.738.21711. PMC 5904443. PMID 29670421. Retrieved 2021-07-30.

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[1] Devi, M. Bhubaneshwari; Devi, O. Sandhyarani; Fikáček, Martin; Minoshima, Yûsuke N.; Wanghengbam, Leiphon (2016-07-27). "Redescription and lectotype designation of Chasmogenus abnormalis (Sharp), with notes on its distribution". Zootaxa. 4144 (2): 296–300. doi:10.11646/zootaxa.4144.2.12. PMID 27470857. Retrieved 2021-07-30.

[2] Jia, Fenglong; Tang, Yu-dan (2018-02-19). "A faunistic study of genus Chasmogenus Sharp, 1882 of China (Coleoptera, Hydrophilidae)". ZooKeys (738): 59–66. doi:10.3897/zookeys.738.21711. PMC 5904443. PMID 29670421. Retrieved 2021-07-30.

[3] Girón, J. C.; Short, A. E. Z. (2016). "Exploring morphological characters associated with habitat transitions in water scavenger beetles (Coleoptera: Hydrophilidae: Acidocerinae)". researchgate.net. Retrieved 2021-07-30.

[4] Hebauer, F.; Ryndevich, S. K. (2005). "New data on the distribution of Old World Hydrophilidae (Coleoptera)" (PDF). Acta Coleopterologica. 21 (1): 43–51.

[5] "Chasmogenus abnormalis (Sharp, 1890)". www.gbif.org. Retrieved 2021-07-30.

[6] Sharp, D. (1890). "On some aquatic Coleoptera from Ceylon". Transactions of the Entomological Society of London. 1890 (2): 339–359. doi:10.1111/j.1365-2311.1890.tb03026.x.

[7] Girón, Jennifer C.; Short, Andrew Edward Z. (2021-06-18). "The Acidocerinae (Coleoptera, Hydrophilidae): taxonomy, classification, and catalog of species". ZooKeys (1045): 1–236. doi:10.3897/zookeys.1045.63810. ISSN 1313-2970. PMC 8233300. PMID 34228772.

[8] Jia, Fenglong; Tang, Yu-dan (2018-02-19). "A faunistic study of genus Chasmogenus Sharp, 1882 of China (Coleoptera, Hydrophilidae)". ZooKeys (738): 59–66. doi:10.3897/zookeys.738.21711. PMC 5904443. PMID 29670421. Retrieved 2021-07-30.

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