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Molluscs of Tasmania

Trigoniidae: Neotrigonia margaritacea (Lamarck, 1804) (‘pearly brooch-shell’)

Synonym(s): margaritacea Lamarck, 1804 bednalli Verco, 1907 antarctica Péron, 1807 horia Cotton, 1953 pectinata Lamarck, 1819.
Typical shell-length 40 mm. Shell thick and heavy. The delicate pink pigment fades but the nacreous, often metallic sheen of the interior surface persists. Lives subtidally and offshore in sand in moderately exposed environments. Native. Endemic to southeastern and southwestern Australia (NSW, TAS, VIC, SA and WA). In Tasmanian waters, this is a widespread species, but not common as a beached shell.


Class: Bivalvia
Subclass: Palaeoheterodonta
Order: Trigonioida
Superfamily: Trigonioidea
Family: Trigoniidae
Genus: Neotrigonia

A-L Localities for Neotrigonia margaritacea

Bangor: Lagoon Bay
Bangor: Two Mile Beach
Bay of Fires: Break Yoke Beach to Pebbly Beach
Beaumaris Beach
Beaumaris: Shelly Point
Beerbarrel Beach
Bicheno: Redbill Beach
Blackmans Bay
Black River Beach: northern end
Black River Beach: southern end
Boltons Beach
Bridport: Adams Beach
Bridport: beach
Bridport: Lades Beach
Bridport: Ninth Island
Bridport (unlocalised)
Bruny Island: Neck Beach
Calverts Beach & Goats Bluff
Carlton: Park Beach
Chain of Lagoons: Four Mile Creek: beach
Clarke Island: Black Point
Clarke Island: Shevo Bay (north end)
Clifton Beach: western end
Cremorne: foreshore
Croppies Point
Davey River: Carvers Point
Denison Beach: Porch Rocks
Denison Beach (unlocalised)
D’Entrecasteaux Channel (unlocalised)
Derwent Estuary: ACMA Asterias survey Stn 27
Derwent Estuary: ACMA Asterias survey Stn 29
Dianas Beach (unlocalised)
Eaglehawk Neck: eastern side
E coast of Tasmania (unlocalised)
Falmouth: Mariposa Beach
Flinders Island: Cameron Inlet
Flinders Island: E coast (unlocalised)
Flinders Island: Northeast River: mouth
Flinders Island: White Beach to Dick Davey Shoal
Freycinet Peninsula (unlocalised)
Georges Bay: St Helens (unlocalised)
Great Musselroe Bay
Hellyer Beach
Hunter Island: Ainslie Beach
Hunter Island: Cave Bay
King Island: Disappointment Bay
King Island: Lavinia Beach: beach nr Lake Martha Lavinia
King Island: Naracoopa: foreshore
King Island: Sea Elephant Bay: Cowper Point
King Island (unlocalised)
King Island: Yellow Rock Beach
Kingston Beach
Lauderdale: Bambra Reef
Lauderdale: Roches Beach
Lauderdale: Seven Mile Beach
Little Peggs Beach
Low Head (unlocalised)

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M-Z Localities for Neotrigonia margaritacea

Macquarie Harbour: Kelly Basin
Maria Island: Hopground Beach
Maria Island: Trigonia Corner
Marion Bay: Bream Creek foreshore
Marion Bay: northern beaches
Marion Bay (unlocalised)
Mayfield Beach to Mayfield Point
Mayfield Point to Little Christmas Island
Mercury Passage: ACMA Asterias survey Stn 04
Mercury Passage: ACMA Asterias survey Stn 08
Narawntapu: Griffiths Point
North Bruny Island: Bull Bay
North Bruny Island: Miles Beach
North Bruny Island: Roberts Point
Northdown Beach
Orford: Spring Beach
Peggs Beach (unlocalised)
Peggs Beach: western end
Pirates Bay (unlocalised)
Port Davey: Bond Bay
Port Davey: Bramble Cove
Port Davey: Schooner Cove
Port Davey (unlocalised)
Randalls Bay
Robbins Island: East Beach
Robbins Island: Ransonnet Bay
Rocky Cape: foreshore N of Picnic Beach
Rocky Cape: Forwards Beach
Rocky Cape: Mary Anne Cove area
Rocky Cape: Picnic Beach & rocks to S
Rocky Cape (unlocalised)
Scamander: Steels Beach
Scamander (unlocalised)
Scamander: Wrinklers Beach
Schouten Island (unlocalised)
Sisters Beach
Smithton: Duck Bay: Picnic Point
Smithton: Duck River mouth
South Arm: Hope Beach: southern end
South Bruny Island: Adventure Bay: East Cove
South Bruny Island: Adventure Bay (unlocalised)
South Bruny Island: Alonnah Beach
South Bruny Island: Alonnah: Sunset Bay
South Bruny Island: Bay of Islands
South Bruny Island: Cloudy Beaches: eastern beach
South coast of Tasmania (unlocalised)
Southport: Roaring Beach
Stanley: Anthony Beach
Stanley: Circular Head
Stanley: East Inlet
Stanley: foreshore
Stanley: Godfreys Beach
Stanley: Halfmoon Bay
Stanley: Tatlows Beach
Stanley (unlocalised)
St Helens Point
Swansea: Jubilee Beach
Swansea: Spiky Beach
Swansea (unlocalised)
Tamar River: Bell Bay: power-station jetty
Tamar River: channel entrance
Taroona: Alum Cliffs
Taroona Beach
Taroona: Hinsby Beach
Tasmania (unlocalised)
The Gardens: Swimcart Beach
Three Hummock Island: East Telegraph Beach
Verona Sands
Walker Island

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