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Family Petaluridae - Petaltails

Gray Petaltail - Tachopteryx thoreyi - male Gray Petaltail - Tachopteryx thoreyi Odonata 10 - Tachopteryx thoreyi Tachopteryx nymph - Tachopteryx thoreyi Tachopteryx nymph - Tachopteryx thoreyi Dragonfly - Tanypteryx hageni Dragonfly sp.   - Tachopteryx thoreyi - female Gray Dragonfly - Tachopteryx thoreyi - female
Classification
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Odonata (Dragonflies and Damselflies)
Suborder Anisoptera (Dragonflies)
Family Petaluridae (Petaltails)
Other Common Names
Graybacks
Numbers
2 spp. in 2 genera in our area(1), 11 spp. in 5 genera worldwide(2)
Size
Large; body length ca. 75 mm(3)
Identification
Large, grayish-brown or blackish. Eyes do not meet on dorsal side of head. Notched median lobe of labium. Stigma 8 mm or greater. Ovipositors well developed.(3)
Range
worldwide, all but one (Tachopteryx thoreyi, e. US) occur around the Pacific(2); both our spp. are localized and rare(3)
Remarks
the family is considered the most primitive among extant dragonflies(2)
Works Cited
1.Dragonfly Society of the Americas. 2012. North American Odonata
2.Dragonflies of the World
Jill Silsby. 2001. Smithsonian Institution Press.
3.A Field Guide to Insects
Richard E. White, Donald J. Borror, Roger Tory Peterson. 1998. Houghton Mifflin Co.