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Pelseneeria brunnea (Tate, 1887)

Description: Shell globose, of about 3 teleoconch whorls. Protoconch tall, cylindrical, pale fawn. Spire whorls very convex; suture well defined, with a strong, smooth cream coloured spiral cord below, and a strong false sutural groove below that. Whole surface with obscure spiral and oblique axial threads. Aperture broad, about half shell length. Outer lip thin, broken in all available specimens. Colour translucent dark brown.

Size: Up to 5 mm in length.

Distribution: Endemic to Australia. Known from central Queensland southwards to South Australia.

Habitat: Parasitic on regular sea urchins; in south-eastern Australia, found on the common purple sea urchin Heliocidaris erythrogramma. Moderately common.

Fig. 1: Port Phillip, Victoria (C.006589, PARATYPE)

 

Copyright Des Beechey 2015