Coenagrion interrogatum

(Selys, 1876)

Subarctic Bluet

Coenagrion interrogatum, commonly known as the Subarctic Bluet, is a small in the Coenagrionidae. First described by Edmond de Sélys Longchamps in 1876, this holds the northernmost distribution of any Eurasian bluet. The larva was formally described in 1980, with documentation of its preferences and period in the Yukon.

Coenagrion interrogatum by the Smithsonian. Used under a CC0 license.

Coenagrion interrogatum 51747194 by Maurice Raymond. Used under a CC BY 4.0 license.

Coenagrion interrogatum Distribution by Loz (L. B. Tettenborn). Used under a CC BY-SA 3.0 license.

Pronunciation

How to pronounce Coenagrion interrogatum: //ˌsiː.nəˈɡraɪ.ɒn ɪnˌtɛr.əˈɡeɪ.təm//

These audio files are automatically generated. While they are not always 100% accurate, they are a good starting point.

Identification

Distinguished from other Coenagrion by its extreme northern distribution; identification to species level requires examination of morphological details, particularly of male terminal appendages and female ovipositor.

Images

Habitat

Pond and wetland in subarctic and regions. Larvae occupy freshwater aquatic environments.

Distribution

The most northerly ranging Eurasian bluet, with records from Alaska, Yukon, Northwest Territories, throughout most of Canada east to Newfoundland, and in northern New England states and some northerly eastern U.S. states.

Seasonality

period documented in the Yukon, though specific months not detailed in available sources.

Life Cycle

Aquatic larval stage (naiad) in freshwater ; terrestrial stage. and nymph development occurs in water.

Similar Taxa

Coenagrion resolutumOverlapping northern distribution; requires careful morphological examination to distinguish.
Other Coenagrion bluetsSimilar blue and black coloration; geographic range is primary distinguishing feature for C. interrogatum.

More Details

Taxonomic history

Originally described as Agrion interrogatum by Hagen in 1876, later transferred to Coenagrion. The larva remained undescribed until 1980.

Research significance

The 1980 description of the larva provided the first formal documentation of , aiding identification of nymphs in subarctic aquatic surveys.