Phylum Mollusca
Taxon ID: 25380
Summary
Maryland Biodiversity Project has documented 303 taxa in Phylum Mollusca spanning 4 classes, 30 orders, 87 families, and 162 genera.
Records
MBP has 4,209 records spanning all 23 Maryland counties and Baltimore City.

























Direct Child Taxa (4)
Taxonomic Leaves (294)
- Dwarf Wedgemussel (Alasmidonta heterodon)
- Susquehanna Elktoe (Alasmidonta marginata)
- Triangle Floater (Alasmidonta undulata)
- Brook Floater (Alasmidonta varicosa)
- Alewife Floater (Utterbackiana implicata)
- Carolina Lance (Elliptio angustata)
- Eastern Elliptio (Elliptio complanata)
- Northern Lance (Elliptio fisheriana)
- Atlantic Spike (Elliptio producta)
- Plain Pocketbook (Lampsilis cardium)
- Yellow Lampmussel (Lampsilis cariosa)
- Eastern Lampmussel (Lampsilis radiata)
- Green Floater (Lasmigona subviridis)
- Tidewater Mucket (Atlanticoncha ochracea)
- Eastern Pondmussel (Sagittunio nasutus)
- Eastern Floater (Pyganodon cataracta)
- Creeper (Strophitus undulatus)
- Paper Pondshell (Utterbackia imbecillis)
- Lake Fingernailclam (Musculium lacustre)
- Swamp Fingernailclam (Musculium partumeium)
- Pond Fingernailclam (Musculium securis)
- Long Fingernailclam (Musculium transversum)
- Adam Peaclam (Pisidium adamsi)
- Ubiquitous Peaclam (Pisidium casertanum)
- Ridged-beak Peaclam (Pisidium compressum)
- Greater Eastern Peaclam (Pisidium dubium)
- Round Peaclam (Pisidium equilaterale)
- River Peaclam (Pisidium fallax)
- Rusty Peaclam (Pisidium ferrugineum)
- Lilljeborg Peaclam (Pisidium lilljeborgi)
- Shiny Peaclam (Pisidium nitidum)
- Perforated Peaclam (Pisidium punctatum)
- Triangular Peaclam (Pisidium variable)
- Walker Peaclam (Pisidium walkeri)
- River Fingernailclam (Sphaerium fabale)
- Herrington Fingernailclam (Sphaerium occidnetale)
- Grooved Fingernailclam (Sphaerium simile)
- Striated Fingernailclam (Sphaerium striatinum)
- Asian Clam (Corbicula fluminea)
- Eastern Oyster (Crassostrea virginica)
- Hooked Mussel (Ischadium recurvum)
- Atlantic Assiminea (Assiminea succinea)
- Chinese Mystery Snail (Cipangopaludina chinensis)
- Mud Bithynia (Bithynia tentaculata)
- Common Periwinkle Snail (Littorina littorea)
- Salt Marsh Snail (Myosotella myosotis)
- Marsh Periwinkle (Littorina irrorata)
- Acute Bladder Snail (Physella acuta)
- Coastal Plain Tiger Snail (Anguispira fergusoni)
- Toothed Hive (Euconulus dentatus)
- Bottleneck Snaggletooth (Gastrocopta contracta)
- Comb Snaggletooth (Gastrocopta pentodon)
- Variable Vertigo (Vertigo gouldi)
- Sculpted Glyph (Glyphyalinia rhoadsi)
- Minute Gem (Hawaiia minuscula)
- Amber Glass (Nesovitrea electrina)
- Medium Striate (Striatura meridionalis)
- Globose Dome (Ventridens ligera)
- Flat Dome (Ventridens suppressus)
- Quick Gloss (Zonitoides arboreus)
- Gray-footed Lancetooth (Haplotrema concavum)
- Compound Coil (Helicodiscus parallelus)
- White-lip Globe (Mesodon thyroidus)
- Whitelip (Neohelix albolabris)
- Hairy Slitmouth (Stenotrema hirsutum)
- Mimic Three-tooth (Triodopsis fallax)
- Atlantic Three-Tooth (Triodopsis juxtidens)
- Small Spot (Punctum minutissimum)
- Bronze Pinecone (Strobilops aeneus)
- Maze Pinecone (Strobilops labyrinthicus)
- Oval Amber Snail (Succinea ovalis)
- Atlantic Ribbed Mussel (Geukensia demissa)
- Glassy Lyonsia (Lyonsia hyalina)
- Atlantic Mud-piddock (Barnea truncata)
- Angelwing (Cyrtopleura costata)
- Soft-shell Clam (Mya arenaria)
- Dwarf Surfclam (Mulinia lateralis)
- Atlantic Jack-knife Clam (Ensis directus)
- Purplish Tagelus (Tagelus divisus)
- Stout Tagelus (Tagelus plebeius)
- Atlantic Macoma (Macoma petalum)
- Amethyst Gem Clam (Gemma gemma)
- False Angelwing (Petricolaria pholadiformis)
- Northern Quahog (Mercenaria mercenaria)
- Morton's Egg-cockle (Laevicardium mortoni)
- Eastern Aligena (Aligena elevata)
- Atlantic Paper Mussel (Amygdalum papyrium)
- Eastern Mudsnail (Ilyanassa obsoleta)
- Bruised Nassa (Nassarius vibex)
- Thick-lipped Drill (Eupleura caudata)
- Atlantic Oyster Drill (Urosalpinx cinerea)
- Common Atlantic Slipper-snail (Crepidula fornicata)
- Convex Slipper-snail (Crepidula convexa)
- Atlantic Rangia (Rangia cuneata)
- Leopard Slug (Limax maximus)
- Dusky Arion (Arion subfuscus)
- Hedgehog Slug (Arion intermedius)
- Appalachian Thorn (Carychium clappi)
- Obese Thorn (Carychium exiguum)
- Ice Thorn (Carychium exile)
- File Thorn (Carychium nannodes)
- Slender Walker (Pomatiopsis lapidaria)
- Cherrystone Drop (Hendersonia occulta)
- Brown Hive (Euconulus fulvus)
- Fat Hive (Euconulus polygyratus)
- Sterki's Granule (Guppya sterkii)
- Glossy Pillar (Cochlicopa lubrica)
- Thin Pillar (Cochlicopa lubricella)
- Appalachian Pillar (Cochlicopa morseana)
- Flamed Tigersnail (Anguispira alternata)
- Angular Disc (Discus catskillensis)
- Forest Disc (Discus whitneyi)
- Domed Disc (Discus patulus)
- Oldfield Coil (Helicodiscus inermis)
- Tight Coil (Helicodiscus notius)
- Temperate Coil (Helicodiscus shimeki)
- Smooth Coil (Helicodiscus singleyanus)
- Changeable Mantleslug (Megapallifera mutabilis)
- Pale Mantleslug (Pallifera dorsalis)
- Foster Mantleslug (Pallifera fosteri)
- Severed Mantleslug (Pallifera secreta)
- Carolina Mantleslug (Philomycus carolinianus)
- Winding Mantleslug (Philomycus flexuolaris)
- Toga Mantleslug (Philomycus togatus)
- Broad-banded Forestsnail (Allogona profunda)
- Upland Pillsnail (Euchemotrema fraternum)
- Flat Bladetooth (Patera appressa)
- Spike-Lip Crater (Appalachina sayana)
- Toothed Globe (Mesodon zaletus)
- Smooth Bladetooth (Patera laevior)
- Bristled Slitmouth (Stenotrema barbatum)
- Bear Creek Slitmouth (Stenotrema simile)
- Whitelip (Triodopsis albolabris)
- Black Velvet Wedge (Triodopsis denotata)
- Big-tooth Whitelip (Triodopsis dentifera)
- Bladetooth Wedge (Triodopsis fosteri)
- Southeastern Whitetooth (Triodopsis major)
- Striped Whitelip (Webbhelix multilineata)
- Nubbin Three-Tooth (Triodopsis obsoleta)
- Spruce Knob Three-Tooth (Triodopsis picea)
- Northern Three-Tooth (Triodopsis tridentata)
- Lamellate Spot (Punctum smithi)
- Glass Spot (Punctum vitreum)
- High-spire Column (Columella simplex)
- Armed Snaggletooth (Gastrocopta armifera)
- Bark Snaggletooth (Gastrocopta corticaria)
- Crested Snaggletooth (Gastrocopta cristata)
- Slim Snaggletooth (Gastrocopta pellucida)
- Wing Snaggletooth (Gastrocopta procera)
- Tapered Snaggletooth (Gastrocopta rupicola)
- White Snaggletooth (Gastrocopta tappaniana)
- Widespread Column (Pupilla muscorum)
- White-Lip Dagger (Pupoides albilabris)
- Tapered Vertigo (Vertigo elatior)
- Blade Vertigo (Vertigo milium)
- Palmetto Vertigo (Vertigo oralis)
- Capital Vertigo (Vertigo oscariana)
- Ovate Vertigo (Vertigo ovata)
- Crested Vertigo (Vertigo pygmaea)
- Swamp Vertigo (Vertigo teskeyae)
- Honey Vertigo (Vertigo tridentata)
- Southern Pinecone (Strobilops texasianus)
- Suboval Ambersnail (avara) (Catinella avara)
- Snowhill Ambersnail (Catinella hubrichti)
- Detritus Ambersnail (Catinella oklahomarum)
- Coastal Plain Ambersnail (Oxyloma effusum)
- Chesapeake Ambersnail (Oxyloma subeffusum)
- Crinkled Ambernsnail (Succinea campestris)
- Xeric Ambernsnail (Succinea indiana)
- Golden Ambersnail (Succinea wilsonii)
- Costate Vallonia (Vallonia costata)
- Iroquois Vallonia (Vallonia excentrica)
- Thin-Lip Vallonia (Vallonia perspectiva)
- Lovely Vallonia (Vallonia pulchella)
- Eastern Glass-Snail (Vitrina angelicae)
- Hill Glyph (Glyphyalinia cumberlandiana)
- Carved Glyph (Glyphyalinia indentata)
- Furrowed Glyph (Glyphyalinia luticola)
- Rust Glyph (Glyphyalinia picea)
- Maryland Glyph (Glyphyalinia raderi)
- Imperphorate Glyph (Glyphyalinia solida)
- Bright Glyph (Glyphyalinia wheatleyi)
- Southeastern Gem (Hawaiia alachuana)
- Copper Button (Mesomphix cupreus)
- Plain Button (Mesomphix inornatus)
- Smooth Button (Mesomphix perlaevis)
- Dentate Supercoil (Paravitrea multidentata)
- Natural Bridge Supercoil (Paravitrea pontis)
- Ribbed Striate (Striatura exigua)
- Black Striate (Striatura ferrea)
- Fine-Ribbed Striate (Striatura milium)
- Golden Dome (Ventridens arcellus)
- Wax Dome (Ventridens cerinoideus)
- Perforate Dome (Ventridens demissus)
- Pyramid Dome (Ventridens intertextus)
- Throaty Dome (Ventridens gularis)
- Split-tooth Dome (Ventridens virginicus)
- Black Gloss (Zonitoides nitidus)
- Heleobops carrikeri
- Henscomb Hydrobe (Littoridinops tenuipes)
- Fine-lined Hydrobe (Onobops jacksoni)
- Mitchell Macoma (Macoma mitchelli)
- Eastern Emerald Elysia (Elysia chlorotica)
- Pointed Campeloma (Campeloma decisum)
- Elongate Macona (Macoma tenta)
- Eastern Melampus (Melampus bidentatus)
- Dark False Mussel (Mytilopsis leucophaeata)
- Dusky Seaslug (Ercolania fuscata)
- Limpet Nudibranch (Corambe obscura)
- Channeled Whelk (Busycotypus canaliculatus)
- Japanese Mystery Snail (Cipangopaludina japonica)
- Banded Mystery Snail (Viviparus georgianus)
- Fragile Ancylid (Ferrissia fragilis)
- Creeping Ancylid (Ferrissia rivularis)
- Dusky Ancylid (Laevapex fuscus)
- Marsh Fossaria (Fossaria humilis)
- Mimic Lymnaea (Pseudosuccinea columella)
- Woodland Pondsnail (Stagnicola catascopium)
- Marsh Pondsnail (Stagnicola elodes)
- Physa carolinae
- Physa gyrina
- Pewter Physa (Physella heterostropha pomila)
- Ash Gyro (Gyraulus parvus)
- Two-ridge Rams-Horn (Helisoma anceps)
- Bugle Sprite (Menetus dilatatus)
- Marsh Rams-Horn (Planorbella trivolvis)
- Thicklip Rams-Horn (Planorbula armigera)
- Sharp Sprite (Promenetus exacuous)
- Three-ridge Valvata (Valvata tricarinata)
- Mud Amnicola (Amnicola limosus)
- Appalachian Spring Snail (Fontigens bottimeri)
- Blue Ridge Springsnail (Fontigens orolibas)
- Squat Duskysnail (Lyogyrus granum)
- Piedmont Elimia (Elimia virginica)
- Crested Mudalia (Leptoxis carinata)
- Grove Snail (Cepaea nemoralis)
- Striped Nudibranch (Cratena pilata)
- Cockscomb Hydrobe (Littoridinops monroensis)
- Atlantic Brief Squid (Lolliguncula brevis)
- Brown-banded Wentletrap (Epitonium rupicola)
- Atlantic Awning Clam (Solemya velum)
- Green Jackknife Clam (Solen viridis)
- False Quahog (Pitar morrhuanus)
- Ponderous Ark (Noetia ponderosa)
- Thin Cyclinella (Cyclinella tenuis)
- Atlantic Surfclam (Spisula solidissima)
- Cayenne Keyhole Limpet (Diodora cayenensis)
- Lemondrop Nudibranch (Doriopsilla pharpa)
- Grass Cerith (Bittiolum varium)
- New Zealand Mud Snail (Potamopyrgus antipodarum)
- Lampsilis sp.
- Suboval Ambersnail (vermeta) (Catinella vermeta)
- Oldfield Coil (Lucilla scintilla)
- Dark-bodied Glass-snail (Oxychilus draparnaudi)
- Meadow Slug (Deroceras laeve)
- Velvet Wedge (Xolotrema denotatum)
- Gould's Shipworm (Bankia gouldi)
- Carved Glyph complex (Glyphyalinia indentata complex)
- Flexed Gyro (Gyraulus deflectus)
- Channeled Barrel-bubble (Acteocina canaliculata)
- Zebra Mussel (Dreissena polymorpha)
- Magnolia Three-tooth (Triodopsis hopetonensis)
- Bladetooth Wedge (Xolotrema fosteri)
- Three-banded Garden Slug (Ambigolimax valentianus)
- Shark Eye (Neverita duplicata)
- Milky Slug (Deroceras reticulatum)
- Atlantic Bay Scallop (Argopecten irradians)
- Blood Ark (Lunarca ovalis)
- Transverse Ark (Anadara transversa)
- Knobbed Whelk (Busycon carica)
- Atlantic Calico Scallop (Argopecten gibbus)
- Florida Marshclam (Cyrenoida floridana)
- Greenhouse Slug (Milax gagates)
- Blue Mussel (Mytilus edulis)
- Longfin Inshore Squid (Loligo pealeii)
- Eastern White Slippersnail (Crepidula plana)
- Yellow Lance (Elliptio lanceolata)
- Five-tooth Vertigo (Vertigo ventricosa)
- Sinistrofulgur laeostomum
- Rounded Snail (Gonyodiscus rotundatus)
- Lunate Dove Shell (Astyris lunata)
- Fossor Coquina (Donax fossor)
- Maritime Garden Snail (Cernuella cisalpina)
- Chestnut Clam (Isocrassina castanea)
- Threeline Mudsnail (Ilyanassa trivittata)
- Channeled Duck Clam (Raeta plicatella)
- Cross-barred Venus (Chione elevata)
- Oval Ambersnail (Novisuccinea ovalis)
- Herrington Fingernailclam (Sphaerium occidentale)
- Midland Siltsnail (Cincinnatia integra)
- Pygmy Fossaria (Galba parva)
- Turritella sp.
- Common Whelk (Buccinum undatum)
- Garden Arion (Arion hortensis)
Additional taxa
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