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Captain Bartlett's polymastia

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Sponge & Cnidarian

Captain Bartlett's polymastia

Polymastia bartletti de Laubenfels, 1942

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WoRMS AphialID

134193

Barcode BIN

<a href=BOLD:ACV9908

https://bench.boldsystems.org/index.php/Public_BarcodeCluster?clusteruri=BOLD:ACV9908 target="_blank" style="text-decoration: underline">BOLD:ACV9908

https://bench.boldsystems.org/index.php/Public_BarcodeCluster?clusteruri=BOLD:ACV9908

Sample IDs

ARC81535 https://bench.boldsystems.org/index.php/MAS_DataRetrieval_OpenSpecimen?selectedrecordid=ATCSP171-24

Collected

Scotian Shelf, Bay of Fundy

Distinguishing Features

• External appearance: Circular cushion shaped sponge with very long papillae (some > 4 cm long). Both the papillae and the surface of sponge are smooth. Colour bright yellow when living or recently collected, pale when preserved in alcohol. Papillae lack visible oscula.

• Skeleton: Has tracts of styles up to 200 µm thick and a cortex with a layer of intermediate styles around 300 µm thick and an ectosomal palisade of tylostyles around 200 µm thick.

• Spicules: Three categories of spicules: small tylostyles around 130–190 by 5–6 µm, Intermediate subtylostyles 450–650 by 9–13 µm, and principal styles 930–1330 by 17–20 µm.

Habitat

Occurs on bedrock but often associated with pebbles and cobbles in soft sediments.

Geographic Range

The type locality of this species is the Foxe Basin (Nunavut, Canada). There are records from Nova Scotia, the Bay of Fundy, and the Gulf of St. Lawrence, and possibly Sweden.

Fun Fact

This sponge is named after Captain Bartlett who commanded the vessel on the expedition that collected the type specimen. He was an Arctic explorer and led several scientific expeditions to the region.

Barcode Distribution

Specimens from Gulf of St. Lawrence, Nova Scotia, and Sweden.

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