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Molluscs of Tasmania

Newtoniellidae – Ataxocerithiinae: Ataxocerithium serotinum (A. Adams, 1855) (‘square-mouthed false-creeper’)

Synonym(s): serotinum A. Adams, 1855 rhodostomum A. Adams, 1855 tubulus Dunker, 1871 conturbatum Iredale, 1936.

Typical shell-length 20 mm. Lives subtidally and offshore amongst sponges. Native. Endemic to southeastern and southwestern Australia (NSW, TAS, VIC, SA and WA). In Tasmanian waters, this is a widespread species but not commonly beached; most likely to be found in the N, where specimens tend to be larger.


Class: Gastropoda
Subclass: Caenogastropoda – Sorbeoconcha
Order: Hypsogastropoda – Littorinimorpha
Superfamily: Triphoroidea
Family: Newtoniellidae
Subfamily: Ataxocerithiinae
Genus: Ataxocerithium

Localities for Ataxocerithium serotinum

Bicheno: Diamond Island
Bicheno: Redbill Beach
Bicheno: Rice Beach
Bicheno: Waubs Beach
Black River Beach: northern end
Black River Beach: southern end
Boltons Beach
Bridport: beach
Bridport: Lades Beach
Burnie: Sulphur Creek
Cape Barren Island: Bungs Beach
Cape Portland: Home Beach
Cape Portland: Petal Point
Cape Portland: Roses Bay
Carlton Beach: Spectacle Island
Chain of Lagoons: Four Mile Creek: beach
Chain of Lagoons: Piccaninny Point
Clarke Island: Black Point
Coles Bay: Honeymoon Bay
Devonport: Coles Beach
East Devonport: Pardoe Point
Flinders Island: Fotheringate Beach: southern end
Flinders Island: Killiecrankie: foreshore
Flinders Island: Leeka: foreshore towards Twelve Hour Point
Flinders Island: Northeast River: mouth
Flinders Island: Trousers Point
Flinders Island (unlocalised)
Freycinet Peninsula: Bryans Beach
Freycinet Peninsula: Hazards Beach
Freycinet Peninsula (unlocalised)
Friendly Beaches
Greens Beach: main beach
Hellyer Beach
King Island: Cape Wickham: foreshore to E
King Island: Little Porky Beach
King Island: Naracoopa: foreshore
King Island: Pass River Bay
King Island: Seal Bay: Black Point
King Island: Seal Point
King Island (unlocalised)
Leith: foreshore
Low Head (unlocalised)
Maria Island: Darlington Bay
Maria Island: Trigonia Corner
Marion Bay: Bream Creek foreshore
Nubeena: Roaring Beach
Orford: Spring Beach
Peggs Beach: western end
Port Latta: Cowrie Point
Robbins Island: Marys Island area
Rocky Cape: Picnic Beach & rocks to S
Schouten Island: Crocketts Bay
Seymour Beach: northern end
South Bruny Island: Adventure Bay: Cemetery Bluff
South Bruny Island: Adventure Bay: Grass Point
South Bruny Island: Cloudy Beaches: eastern beach
Southport: Roaring Beach
Stanley: foreshore
Stanley: Halfmoon Bay
Stanley: Tatlows Beach
Tamar River: Kelso: foreshore
Tasmania (unlocalised)
The Gardens: Cosy Corner
The Gardens: Mateys Gulch to Gardens Lagoon
The Gardens: Swimcart Beach
Three Hummock Island: Three Gullies Bay
Three Hummock Island: Three Gullies Bay: southern end
Trial Harbour
Weymouth: beach

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