Leucorrhinia Brittinger,1850(Libellulidae) - Whitefaces

Notes - MichiganSpecies List - Key -References
Back toLibellulidae - Back to Anisoptera - Back toHome Page
Page last updated: 06August 1998 (EB)

Notes on theMichigan Species ofLeucorrhinia

Of the seven species of Leucorrhinia found inNorth America, five are found in our area (see maps below). Larvaeare small, smooth and greenish in appearence with brownish markings.Leucorrhinia larvae are common in bog lakes and ponds with floatingvegetation; however, L.intacta can be common in marshy bays,farm ponds and slow streams. L.hudsonica is a denizen of bogs and coldmarshy ponds; it is a widely distributed boreal and montaine specieswith its southern range limit in Michigan. Similarly, L. glacialis andL. proxima are found along the margins of floating bogs andmuskegs, the former species inhabiting the waters of high acidity.Walker andCorbet (1975) remains a most usefultreatment for Michigan species.

WWW-links on the ecology and biology of larvalLeucorrhinia:
no links found as of 15 January 1998

back totop
Michigan SpeciesList

Map 1Map 2Map 3
Map 4Map 5
Maps 1-5: County distribution of the Michigan species of
Click on map for largerimage

Leucorrhinia frigida Hagen, 1890 - Frosted Whiteface - Map 1
Leucorrhinia glacialis
Hagen, 1890 - Crimson-ringed Whiteface - Map 2
Leucorrhinia hudsonica
(Selys, 1850) - Hudsonian Whiteface - Map 3
Leucorrhinia intacta
(Hagen, 1861) - Dot-tailed Whiteface - Map 4
Leucorrhinia proxima
Calvert, 1890 - Red-waisted Whiteface - Map 5

back totop
Key to Mature Larvae of Michigan Leucorrhinia
(Adapted from Walker and Corbet1975)

1a. Dorsal spines onabdominal segments 3-8; venter of abdomen without continuouslongitudinal dark bands, although transverse dark bands may bepresent (picture) - 2

1b. Dorsalspines absent on abdominal segments 7-8; venter of abdomen with threeconspicuous (rarely inconspicuous) continuous longitudinal dark bands(picture) - 4

2a.(1a). Eyes very prominent (picture); lateral spines onabdominal segment 9 extending nearly back to tips of paraprocts orbeyond (picture) - L.frigida

2b. Eyes notprominent (picture); lateral spines on abdominal segment 9 clearlyshort of the tips of the paraproct (picture) - 3
Back to previous couplet(1)

3a.(2b). Dorsal hook on abdominal segment 7 as long asmid-dorsal length of that segment, that of segment 8 projecting wellover the base of segment 9 (picture); lateral spines on segment 8directed parallel and caudad, outer margins not continuing with theregular curve of the abdominal margin when viewed dorsally (picture);lateral spines of segment 9 extending beyond tips of cerci (picture)- L. intacta

3b. Dorsalhook on abdominal segment 7 clearly shorter than mid-dorsal length ofthat segment, that of segment 8 projecting just past the base ofsegment 9 (picture); lateral spines on segment 8 curved with regularcurve of abdominal margin, appearing slightly convergent (picture);lateral spines of segment 9 do not extend to the tips of the cerci(picture) - L.proxima
Back to previous couplet(2); Back to beginning of key

4a.(1b). Total length < 18.5 mm; lateral spines onabdominal segments 8 and 9 with outer margins slightly divergent ,not following the contour of the outer margin of those segments(picture); some vestigial dorsal hooks may be present (picture);lateral spines of abdominal segment 9 extending to, or slightlybeyond, the tips of the cerci (picture) - L. hudsonica

4b. Totallength > 18.5 mm; lateral spines on abdominal segments 8 and 9with outer margins not divergent (pictures); no vestigial dorsalspines; lateral spine of abdominal segment 9 extending short of thetips of the cerci (picture) - L.glacialis
Back to previous couplet(1)

back totop

Brittinger, C. C.1850. Die Libelluliden des Kaiserreichs Österreich. S. B. Acad.Wiss. Wien 4, Mathem.-nat. Klasse:328-336.

Calvert, P. P. 1890.Notes on some North American Odonata, with descriptions of three newspecies. Transactions of the AmericanEntomological Society 17:33-40.

Hagen, H. A. 1890. Asynopsis of the odonate genus Leucorrhinia Britt.Transactions of the AmericanEntomological Society17:229-236.

Hagen, H. A. 1861.Synopsis of the Neuroptera of North America, with a list of the SouthAmerican species. SmithsonianMiscellaneous Collections4:1-347.

Selys-Longchamps, M.E. de. 1850. Revue des odonates ou Libellules d'Europe.Mémoires de laSociété royale des Sciences deLiége 6:1-408.

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

back totop