Pachydiplax Brauer, 1868 - Dashers
Pachydiplax longipennis (Burmeister,1839) - Blue Dasher

Notes - References
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Page last updated: 28August 1998 (EB)

Noteson Pachydiplax longipennisin Michigan

Pachyiplax longipennis (Fig. 1, above) is widely distributed in North America,and the species reaches Michigan in the northernmost part of itsrange. Though no records are known from the UP, species is foundthroughout the southern LP (Fig. 2).

Fig. 2: County records of P. longipennis in Michigan
Click on map for a full-sized image

The larval body is smooth, their broad headdistinctly characterized with a prominent dark ridge running mesadfrom the mesoposterior part of the eye, and prominent lateral spineson the abdomen (Walker and Corbet1975).

Larvae are found in lakes and ponds as well asin slow sections and backwater areas of streams. Bick (1950) in Mississippi collected larvae from standing waterwith a mud bottom, in ponds, borrow pits or creek pot holes.Musser(1962) collected larvae in Utah fromaquatic vegetation along the edge of a spring-formed pond. Larvaeemerge from late May through probably July. Populations in Michiganare probably univoltine, as Paulson and Jenner(1971) found overwintering larvae inNorth Carolina, but populations probably have overlapping generationsfurther south in its range (Penn 1951).

Links on the ecology and biology ofPachydiplax longipennis:
none found as of 22 February 1998

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Bick, G. H. 1950. Thedragonflies of Mississippi (Odonata: Anisoptera). American Midland Naturalist 43:66-78.

Brauer, F. 1868.Verzeichniss der bis jetzt bekannten Neuropteren im Sinne Linne's.Verh. Zool.-Bot. Ges. Wien 18:359-416, 711-742.

Burmeister, H.1839. Handbuch der Entomolgie. Vol. 2. Enslin: Berlin. pp397-1050.

Musser, R. J. 1962.Dragonfly nymphs of Utah (Odonata: Anisoptera). University of Utah, Biological Series 12(6). 66 pp.

Paulson, D.R., and C. E. Jenner. 1971. Population structure in overwinteringlarval Odonata in North Carolina in relation to adult flight season.Ecology52:96-107.

Penn, G. H. 1951.Seasonal variation in the adult size of Pachydiplax longipennis(Burmeister) (Odonata, Libellulidae). Annals of the Entomological Society ofAmerica 44(2):193-197.

Walker, E. M.,and J. S. Corbet. 1975. The Odonata of Canada and Alaska, Vol. 3.University of Toronto Press: Toronto. xvi + 308 pp.

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