Celithemis Hagen, 1861 - Pennants


Figure 1: Celithemis fasciata (monomelaena) larva (3x, dorsal view),
collected from Third Sister Lake, Washtenaw Co., MI, on 12 June 1934 by J. W. Leonard. UMMZODO-0862.

Notes - Michigan Species List - Key - References
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Page last updated: 19 August 1998 (EB)

Notes on the Michigan Species of Celithemis

Three of the ten North American species of Celithemis have been recorded in Michigan. Both C. elisa and C. eponina are widely distributed in both peninsulas, whereas records for C. fasciata exist only for the southern LP (see maps below).

Larvae are often found in lakes and ponds with aquatic vegetation, though sometimes specimens are taken from still or slow-moving sections of streams among macrophytes. These medium-sized, thin-legged, delicate greenish larvae (Figure 1) are distinguished from our other libellulids by the lack of middorsal spines on abdominal segment 8, and the long lateral spines of abdominal segments 8 and 9, the latter of which are twice the length of segment 8 and extend to or past the tips of the paraprocts. In fact, these characters together with the rather long length of the cerci (about 0.5x length of the paraproct) and the rather truncate shape of the end of the abdomen may confuse some with corduliids. However, the margin of the lateral lobes of Celithemis are only finely crenate, with dentations much less pronounced than other corduliids. Emergence of adults in Michigan in June through early July, and exuvia are often found clinging to vegetation emerging up from water (Leonard 1934, pers. obs.).

Other links with information on the biology or ecology of larval Celithemis:
Brief habitat notes from Ottawa (Ontario, Canada) >> http://www.cyberus.ca/~jdsankey/odon2.html

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Michigan Species List

Map 1 Map2 Map 3

Celithemis elisa (Hagen, 1861) - Calico Pennant - Map 1
Celithemis eponina
(Drury, 1773) - Halloween Pennant - Map 2
Celithemis fasciata (
syn. monomelaena) Kirby, 1889 - Banded Pennant - Map 3

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Key to the Mature Larvae of Michigan Celithemis
(References:
Needham and Westfall 1955, Daigle 1992)

1a. Eyes tapering to an acutely conical, pointed tip (picture) - C. fasciata

Fig. 1a1
Fig. 1a1:
Celithemis fasciata (monomelaena) larva (12.5x, dorsal view), collected from Third Sister Lake, Washtenaw Co., MI, on 12 June 1934 by J. W. Leonard. UMMZODO-0862.

1b. Outer edge of eyes rounded laterally (picture) - 2

Fig. 1b1
Fig. 1b1: Celithemis elisa larva (12.5x, dorsal view), collected from Craig Lake, Branch Co., MI, on 28 June 1938 by Brown and Ball. UMMZODO-1536.


2a.(1b). Length of mature larva 19 mm or more; lateral spines of Ab9 > 2x it's middorsal length - C. eponina

2b. Length of mature larva < 19 mm; lateral spines of Ab9 not more than 2x it's middorsal length; epiproct about 0.7x the length of paraprocts - C. elisa
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References

Daigle, J. J. 1992. Florida dragonflies (Anisoptera): a species key to the aquatic larval stages. State of Florida, Department of Environmental Regulation Technical Series 12(1):iv, 1-29.

Drury, D. 1773. Illustrations of natural history. Vol. 2. White: London. 90 pp.

Hagen, H. A. 1861. Synopsis of the Neuroptera of North America, with a list of the South American species. Smithsonian Miscellaneous Collections 4:1-347.

Kirby, W. F. 1889. A revision of the subfamily Libellulinae with descriptions of new genera and species. Transactions of the Zoological Society of London 12:249-348.

Leonard, J. W. 1934. The naiad of Celithemis monomelaena Williamson (Odonata: Libellulidae). Occasional Papers of the Museum of Zoology, University of Michigan 297. 5 pp.

Needham, J. G., and M. J. Westfall. 1955. A Manual of the Dragonflies of North America (Anisoptera). University of California Press: Berkeley, California. x + 615 pp.

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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