Clamp-tipped Emerald Somatochlora tenebrosa (Say, 1839)  

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Clamp-tipped Emerald (Somatochlora tenebrosa) is a widespread and familiar Somatochlora in much of the east. It is named for the extremely peculiar, clamp-shaped cerci and epiproct of the male. This dragonfly breeds in small, shaded forest streams (Paulson, 2011). In Maryland, the species is widespread, and is probably the most common species of its genus in the state (Richard Orr's The Dragonflies and Damselflies of Maryland and the District of Columbia).

There are 41 records in the project database.

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A female Clamp-tipped Emerald in Frederick Co., Maryland (8/20/2013). Photo by Richard Orr. (MBP list)

A female Clamp-tipped Emerald in Anne Arundel Co., Maryland (7/19/2015). Photo by Richard Orr. (MBP list)

A Clamp-tipped Emerald in Frederick Co., Maryland (8/20/2013). Photo by Bonnie Ott. (MBP list)

A Clamp-tipped Emerald in Garrett Co., Maryland (7/8/2007). Photo by Jim Stasz. (MBP list)

A Clamp-tipped Emerald in Anne Arundel Co., Maryland (7/27/2010). Photo by Tyler Bell. (MBP list)

A female Clamp-tipped Emerald in Frederick Co., Maryland (8/20/2013). Note the eggs. Photo by Bonnie Ott. (MBP list)

A male Clamp-tipped Emerald in Garrett Co., Maryland (7/20/2008). I caught this dragonfly for identification purposes then placed him in a natural position so photos could be taken. You can tell he was caught and placed by his wings being up-turned and not laying flat like they would be naturally. This is an easy way to tell if a dragonfly photograph was truly in situ. Photo by Jim Brighton. (MBP list)


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