Megalagrion

Megalagrion
M. calliphya
Scientific classification
Kingdom:	Animalia
Phylum:	Arthropoda
Class:	Insecta
Order:	Odonata
Suborder:	Zygoptera
Superfamily:	Coenagrionoidea
Family:	Coenagrionidae
Subfamily:	Pseudagrioninae
Genus:	Megalagrion McLachlan, 1883
Species
See text

Megalagrion is a genus of damselflies in the family Coenagrionidae It contains approximately 26 species, all of which are endemic to Hawaiʻi.

Larval Megalagrion live in widely diverse habitats, including the expected streams and pools. Megalagrion also exploit some surprising habitats such as plant leaf axils, waterfall faces, and even damp fern litter far from water sources. M. oahuense is the only species of damselfly whose naiad is terrestrial, living in damp fern litter until metamorphosis.

Many species of Megalagrion are in danger due to habitat loss and predation by non-native fish. To protect them, non-native fish should never be released in Hawaiian streams.

The genus contains the following species:^[1]

• Megalagrion adytum (Perkins, 1899) - Adytum Swamp Damselfly^[2]
• Megalagrion amaurodytum (Perkins, 1899)
• Megalagrion blackburni McLachlan, 1883
• Megalagrion calliphya (McLachlan, 1883)
• Megalagrion deceptor (McLachlan, 1883)
• Megalagrion dinesiotes (Kennedy, 1934)
• Megalagrion eudytum (Perkins, 1899)
• Megalagrion hawaiiense (McLachlan, 1883)
• Megalagrion heterogamias (Perkins, 1899)
• Megalagrion jugorum (Perkins, 1899) - Maui Upland Damselfly, (Maui, extinct)^[3]
• Megalagrion kauaiense (Perkins, 1899)
• Megalagrion koelense (Blackburn, 1884) - Koele Mountain Damselfly^[4]
• Megalagrion leptodemas (Perkins, 1899) - Crimson Hawaiian Damselfly^[5]
• Megalagrion mauka Daigle, 1997
• Megalagrion molokaiense (Perkins, 1899) - Molokai Damselfly^[6]
• Megalagrion nesiotes (Perkins, 1899) - Flying Earwig Hawaiian Damselfly^[7]
• Megalagrion nigrohamatum (Blackburn, 1884) - Nigrohamatum Damselfly^[8]
• Megalagrion oahuense (Blackburn, 1884) - Oahu Damselfly^[9]
• Megalagrion oceanicum McLachlan, 1883 - Oceanic Hawaiian Damselfly^[10]
• Megalagrion oresitrophum (Perkins, 1899)
• Megalagrion orobates (Perkins, 1899)
• Megalagrion pacificum (McLachlan, 1883) - Pacific Hawaiian Damselfly^[11]
• Megalagrion paludicola Maciolex & Howarth, 1979 - Kauai Bog Damselfly^[12]
• Megalagrion vagabundum (Perkins, 1899)
• Megalagrion williamsoni (Perkins, 1910)
• Megalagrion xanthomelas (Selys, 1876) - Orangeblack Hawaiian Damselfly^[13]

References

1. Martin Schorr; Martin Lindeboom; Dennis Paulson. "World Odonata List". University of Puget Sound. Retrieved 3 Oct 2013.
2. Polhemus, D.A. (2006). "Megalagrion adytum". IUCN Red List of Threatened Species. Version 2010.3. International Union for Conservation of Nature. Retrieved 1 February 2011.
3. Odonata Specialist Group (1996). "Megalagrion jugorum". IUCN Red List of Threatened Species. Version 2010.3. International Union for Conservation of Nature. Retrieved 1 February 2011.
4. Clausnitzer, V. (2007). "Megalagrion koelense". IUCN Red List of Threatened Species. Version 2010.3. International Union for Conservation of Nature. Retrieved 1 February 2011.
5. Polhemus, D.A. (2006). "Megalagrion leptodemas". IUCN Red List of Threatened Species. Version 2010.3. International Union for Conservation of Nature. Retrieved 1 February 2011.
6. Polhemus, D.A. (2006). "Megalagrion molokaiense". IUCN Red List of Threatened Species. Version 2010.3. International Union for Conservation of Nature. Retrieved 1 February 2011.
7. Polhemus, D.A. (2006). "Megalagrion nesiotes". IUCN Red List of Threatened Species. Version 2010.3. International Union for Conservation of Nature. Retrieved 1 February 2011.
8. Odonata Specialist Group (1996). "Megalagrion nigrohamatum". IUCN Red List of Threatened Species. Version 2010.3. International Union for Conservation of Nature. Retrieved 1 February 2011.
9. Odonata Specialist Group (1996). "Megalagrion oahuense". IUCN Red List of Threatened Species. Version 2010.3. International Union for Conservation of Nature. Retrieved 1 February 2011.
10. Odonata Specialist Group (1996). "Megalagrion oceanicum". IUCN Red List of Threatened Species. Version 2010.3. International Union for Conservation of Nature. Retrieved 1 February 2011.
11. Odonata Specialist Group (1996). "Megalagrion pacificum". IUCN Red List of Threatened Species. Version 2010.3. International Union for Conservation of Nature. Retrieved 1 February 2011.
12. Clausnitzer, V. (2007). "Megalagrion paludicola". IUCN Red List of Threatened Species. Version 2010.3. International Union for Conservation of Nature. Retrieved 1 February 2011.
13. Odonata Specialist Group (1996). "Megalagrion xanthomelas". IUCN Red List of Threatened Species. Version 2010.3. International Union for Conservation of Nature. Retrieved 1 February 2011.