VCSU Macro-Invertabrate Lab
Links
Main Key
Order List
Glossary of Terms
:: Home ::
 
Quick Search:
Advanced.. Search
 
 
 
Main Key

Order key (cont.)

Group 1

 
Order Ephemeroptera - the mayflies - Mouth usually regular chewing type, larvae with usually 3 prominent caudal filaments (Fig. 1), presence of lateral gills on abdomen (Fig. 2), and legs with one tarsal claw (Fig. 3).

Caenidae tail Ephemeridae body Heptageniidae tarsi
 
Order Plecoptera - the stoneflies - Larvae usually with 2 prominent caudal filaments (Fig. 4), gills are feathery and can be found on thorax (Fig. 5), head, or abdomen; legs have two tarsal claws. Figure 6 is an example of the dorsal view of a Plecoptera.

Perlodidae cerci Perlidae gills Perlidae body
 
Order Odonata - the damselflies and dragonflies - Labium (lowerlip) modified into a structure that can be extended forward (Fig. 7), some have 3 caudal appendages that are broader than filaments found in Ephemeroptera (Fig. 8). Odonata may be similar to Figure 9.

Lestidae labrum Coenagrionidae lamellae Both larval types
 

This web site is funded by Region VIII EPA Section 319 funds administered by the North Dakota Department of Health.
|Contact Us |Acknowledgements |


Valley City State University - 101 College Street SW - Valley City, ND 58072 - 1-800-532-8641
|xhtml |css |508