Mollusks

Endangered

Arcidens confragosus (Say) -- rock pocketbook

Elliptio crassidens (Lamarck) -- elephant-ear

Fusconaia ebena (I. Lea) -- ebonyshell

Lampsilis higginsi (I. Lea) -- Higgins eye (E)

Lampsilis teres (Rafinesque) -- yellow sandshell

Novasuccinea (n. sp. Minnesota B Hoagland & Davis) -- Iowa Pleistocene ambersnail

Plethobasus cyphyus (Rafinesque) -- sheepnose (C)

Quadrula fragosa (Conrad) -- winged mapleleaf (E)

Quadrula nodulata (Rafinesque) -- wartyback

Vertigo hubrichti hubrichti (Pilsbry) -- Midwest Pleistocene vertigo

Threatened

Actinonaias ligamentina (Lamarck) -- mucket

Alasmidonta marginata (Say) -- elktoe

Cumberlandia monodonta (Say) -- spectaclecase (C)

Cyclonaias tuberculata (Rafinesque) -- purple wartyback

Ellipsaria lineolata (Rafinesque) -- butterfly

Epioblasma triquetra (Rafinesque) -- snuffbox

Megalonaias nervosa (Rafinesque) -- washboard

Novasuccinea (n. sp. Minnesota A Hoagland & Davis) -- Minnesota Pleistocene ambersnail
Pleurobema coccineum (Conrad) -- round pigtoe

Quadrula metanevra (Rafinesque) -- monkeyface

Simpsonaias ambigua (Say) -- salamander mussel

Tritogonia verrucosa (Rafinesque) -- pistolgrip

Venustaconcha ellipsiformis (Conrad) -- ellipse

Vertigo hubrichti variabilis (n. subsp.) -- variable Pleistocene vertigo

Vertigo meramecensis (Van Devender) -- bluff vertigo

Special Concern

Elliptio dilatata (Rafinesque) -- spike

Lasmigona compressa (I. Lea) -- creek heelsplitter

Lasmigona costata (Rafinesque) -- fluted-shell

Ligumia recta (Lamarck) -- black sandshell

Obovaria olivaria (Rafinesque) -- hickorynut