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The California freshwater isopod, Asellus tomalensis, rediscovered and compared with Asellus occidentalis


Asellus tomalensis is redescribed from topotypes collected near Bolinas Lagoon, California, and compared with A. occidentalis, the only other epigean asellid restricted to the Pacific coast of North America. Both species show more resemblence to eastern North American species now assigned to Conasellus than to Asiatic genera or subgenera.

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Bowman, T.E. The California freshwater isopod, Asellus tomalensis, rediscovered and compared with Asellus occidentalis. Hydrobiologia 44, 431–441 (1974).

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  • Pacific Coast
  • Lateral Margin
  • Plumose Seta
  • South Fork
  • Flagellar Segment