I want to thank the many, many of you who have responded with suggestions of invertebrate guides that would be easy for undergrads to use. The most highly recommended by far were Merritt and Cummins; Voshell; McCafferty; and the Peterson guide. If anyone knows of a good guide for microinverts (such as rottifers, cladocerans, etc.), we've been finding quite a few of those lately, so that would also be very helpful. Thanks again!
Carrie DeJaco
