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Plain Pocketbook
Lampsilis cardium
287 observations
Fatmucket
Lampsilis siliquoidea
204 observations
Fragile Papershell
Potamilus fragilis
107 observations
Giant Floater
Pyganodon grandis
90 observations
Three-horn Wartyback
Obliquaria reflexa
63 observations
Three-ridge Mussel
Amblema plicata
51 observations
White Heelsplitter
Lasmigona complanata
50 observations
Pink Papershell
Potamilus ohiensis
45 observations
Pimpleback
Pustulosa pustulosa
45 observations
Chinese Mystery Snail
Margarya chinensis
44 observations
Wabash Pigtoe
Fusconaia flava
42 observations
Elktoe
Alasmidonta marginata
39 observations
Ellipse
Venustaconcha ellipsiformis
39 observations
Black Sandshell
Ligumia recta
37 observations
Striped Whitelip
Webbhelix multilineata
37 observations
Zebra Mussel
Dreissena polymorpha
32 observations
Flamed Tigersnail
Anguispira alternata
31 observations
Mapleleaf
Quadrula quadrula
29 observations
Lilliput
Toxolasma parvum
27 observations
Pink Heelsplitter
Potamilus alatus
21 observations
Milky Slug
Deroceras reticulatum
21 observations
Yellow Sandshell
Lampsilis teres
20 observations
Asian Clam
Corbicula fluminea
15 observations
Flutedshell
Lasmigona costata
13 observations
Striated Fingernailclam
Sphaerium striatinum
12 observations
Paper Pondshell
Utterbackia imbecillis
10 observations
Higgins' Eye Pearly Mussel
Lampsilis higginsii
9 observations
Hickorynut
Obovaria olivaria
9 observations
Fawnsfoot
Truncilla donaciformis
9 observations
Leopard Slug
Limax maximus
8 observations
Washboard
Megalonaias nervosa
8 observations
Monkeyface Mussel
Theliderma metanevra
8 observations
Mucket
Ortmanniana ligamentina
8 observations
Creeper
Strophitus undulatus
7 observations
Carolina Mantleslug
Philomycus carolinianus
7 observations
Pistolgrip
Quadrula verrucosa
7 observations
Rock-pocketbook
Arcidens confragosus
6 observations
Marsh Ramshorn
Planorbella trivolvis
6 observations
Acute Bladder Snail
Physella acuta
6 observations
Butterfly Mussel
Ellipsaria lineolata
5 observations
Round Pigtoe
Pleurobema sintoxia
5 observations
Meadow Slug
Deroceras laeve
5 observations
Spike
Eurynia dilatata
5 observations
White-lip Globe Snail
Mesodon thyroidus
4 observations
Deertoe Mussel
Truncilla truncata
4 observations
Pointed Campeloma
Campeloma decisum
4 observations
Grooved Fingernailclam
Sphaerium simile
4 observations
Western Dusky Slug
Arion subfuscus
3 observations
Oval Ambersnail
Novisuccinea ovalis
3 observations
Cylindrical Papershell
Anodontoides ferussacianus
3 observations
Frequently Asked Questions
- The 10 most common molluscs in Iowa are:
- Plain Pocketbook (Lampsilis cardium)
- Fatmucket (Lampsilis siliquoidea)
- Fragile Papershell (Potamilus fragilis)
- Giant Floater (Pyganodon grandis)
- Three-horn Wartyback (Obliquaria reflexa)
- Three-ridge Mussel (Amblema plicata)
- White Heelsplitter (Lasmigona complanata)
- Pink Papershell (Potamilus ohiensis)
- Pimpleback (Pustulosa pustulosa)
- Chinese Mystery Snail (Margarya chinensis)
- The most observed mollusc in Iowa is Plain Pocketbook (Lampsilis cardium), with 287 recorded observations.