Photo of a spothanded crayfish viewed from above on white background.

    Crayfishes

    About 36 species in Missouri
    ellipse

    Ellipse and Bleedingtooth

    Venustaconcha ellipsiformis and V. pleasii
    Monkey Face Mussel

    Freshwater Mussels

    Bivalve molluscs in order Unionoida
    Photo of a leech

    Leeches

    Various species in the subclass Hirudinea
    round pigtoe

    Round Pigtoe

    Pleurobema sintoxia
    Photo of a northern, also called virile, crayfish.

    Virile Crayfish (Northern Crayfish)

    Faxonius virilis (formerly Oronectes virilis)
    Photo of a White River crawfish.

    White River Crawfish

    Procambarus acutus