Chasmogenus abnormalis

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

Chasmogenus 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]

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.[6]

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.
"Exploring morphological characters associated with habitat transitions in water scavenger beetles (Coleoptera: Hydrophilidae: Acidocerinae)". researchgate.net. Retrieved 2021-07-30.
"New Data on the Distribution of Old World Hydrophilidae (Coleoptera)" (PDF). ACTA COLEOPTEROLOGICA XXI. 1. 43 - 51 1.2.2005 ISSN 0178-7217. Retrieved 2021-07-30.
"Chasmogenus abnormalis (Sharp, 1890)". www.gbif.org. 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.

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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] "Exploring morphological characters associated with habitat transitions in water scavenger beetles (Coleoptera: Hydrophilidae: Acidocerinae)". researchgate.net. Retrieved 2021-07-30.

[4] "New Data on the Distribution of Old World Hydrophilidae (Coleoptera)" (PDF). ACTA COLEOPTEROLOGICA XXI. 1. 43 - 51 1.2.2005 ISSN 0178-7217. Retrieved 2021-07-30.

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

[6] 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.