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Family Nepidae - Waterscorpions

Waterscorpion - Nepa apiculata Water Scorpion - Ranatra Unidentified Stick Insect - Ranatra australis ID help - Ranatra buenoi Waterscorpion - Ranatra water scorpion - Ranatra Ranatra Water Bug - Ranatra
Classification
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Hemiptera (True Bugs, Cicadas, Hoppers, Aphids and Allies)
Suborder Heteroptera (True Bugs)
Infraorder Nepomorpha (Aquatic Bugs)
Superfamily Nepoidea
Family Nepidae (Waterscorpions)
Explanation of Names
Nepidae Latreille 1802
Numbers
2 subfamilies, with 13 spp. in 3 genera in our area(1) and ~270 spp. in 15 genera worldwide(2)
Size
15-46 mm + 16-44 mm breathing tube(1)
Identification
Ranatra resemble walkingsticks
Nepa resemble giant water bugs; e. US
Curicta AZ-TX only
Range
Worldwide, particularly warmer regions(3); in our area, Ranatra are widespread (and the most commonly found), Nepa apiculata occurs in e. US, and the relatively rare Curicta species, in sw. US(4)
Habitat
Slow moving streams, ponds and similar bodies of water(3)
Works Cited
1.American Insects: A Handbook of the Insects of America North of Mexico
Ross H. Arnett. 2000. CRC Press.
2.Biodiversity of the Heteroptera
Henry T.J. 2009. In: Foottit R.G., Adler P.H., eds. Insect biodiversity: Science and society. Oxford: Wiley-Blackwell: 223-263.
3.DK Handbooks: Insects, Spiders and Other Terrestrial Arthropods
George C. McGavin, Steve Gorton, Louis N. Sorkin. 2000. Dorling Kindersley Publishing.
4.Borror and DeLong's Introduction to the Study of Insects
Norman F. Johnson, Charles A. Triplehorn. 2004. Brooks Cole.