Aquatic Insects of Michigan
by Ethan Bright, Museum of Zoology Insect Division and School of Natural Resources and Environment
University of Michigan
- Home
- Species Lists
- Coleoptera
- Diptera
- Ephemeroptera
- Acanthametropodidae
- Ameletidae
- Ametropodidae
- Arthropleidae
- Baetidae
- Baetiscidae
- Behningiidae
- Caenidae
- Ephemerellidae
- Ephemeridae
- Heptageniidae
- Isonychiidae
- Leptohyphidae
- Leptophlebiidae
- Metretopodidae
- Neoephemeridae
- Oligoneuriidae
- Palingeniidae
- Polymitarcyidae
- Potamanthidae
- Pseudironidae
- Siphlonuridae
- Heteroptera
- Hymenoptera
- Lepidoptera
- Megaloptera
- Neuroptera (Sisyridae)
- Odonata
- Orthoptera
- Plecoptera
- Trichoptera
- Other Orders
- Keys/Identification
- Aquatic Insects of Michigan
Caenidae of Michigan - Identification
Adults (adapted from Edmunds and Waltz 1996)
| 1a | a. Prosternum half as long as broad, rectangular in shape | BrachycercusCurtis |
| b. Forecoxae widely separated on venter | ||
| also: Spines on Ab6 tergum slightly bent dorsally; pedicel at least 1.5-2.0x longer than scape; eggs oval, two to three times longer than broad | ||
| note: Uncommon | ||
| 1b | a. Prosternum 2-3x as long as broad, triangular in shape | Caenis Stephens |
| b. Forecoxae close together on venter | ||
| note: Widespread |
Nymphs (adapted from Edmunds and Waltz 1996)
| 1a | a. Head with three prominent ocellar tubercles | Brachycercus Curtis |
| b. Palps of maxilla and labia 2-segmented | ||
| c. Fore legs distinctly shorter than middle and hind legs | ||
| also: Anterior margin of mesosternum flat, without bristles; spines on Ab6 tergum not curved medially | ||
| note: Uncommon | ||
| 1b | a. Head without prominent ocellar tubercles | Caenis Stephens |
| b. Palps of maxilla and labia 3-segmented | ||
| c. Fore legs subequal in length to middle and hind legs | ||
| also: Inner margin of fore tibiae and tarsi with a row of stout spines; segment 3 of labial palp subequal or shorter than segment 2, with few long setae and spines; outer margin of operculate gills fringed with long setae | ||
| note: Widespread |
References
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Edmunds GF, Waltz RD. 1996. Ephemeroptera, pp. 126-163 in Merritt RW, Cummins KW (editors), An Introduction to the Aquatic Insects of North America, 3rd Edition. Kendall/Hunt Publishing Company: Dubuque, Iowa.
Page created: June 15, 2003; Last edited: August 7, 2003 (EB)