The Evolutionary Journey of Crayfish and Cockroach By Michael Smith and Fawn O’Brien

Interesting Crayfish Characteristics Chelipeds – big pinchers for defense Maxillipeds – 3 sets of feeding claws Swimmerets – assist in swimming and females use them to carry eggs under their body

Interesting Crayfish Characteristics Ability to molt Ability to regenerate – regrow limbs Eye stalks – eyes can swivel on stalks

Cockroach & Crayfish Family Tree How Water Flea Crayfish Cockroach Brine Shrimp Shrimp Grasshopper Butterfly Fly Makes larvae Decapods--10 walking legs Silverfish Crustacea-crusty shell maxilipeds, Chilipeds, swimmerets Cockroach & Crayfish Family Tree Centipedes Hexapoda--6 legs compound eyes Spiders Land Arthropods-jointed legs Aquatic

Crayfish Cockroach Human Paramecium Bean Where do we fit?