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Halosydna
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Halosydna

annelid genus
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Quick Summary

Halosydna is a genus of scale worms, which are marine annelid worms belonging to the superfamily Aphroditoidea. These segmented worms are found worldwide and are characterized by dorsal scales, known as elytra, that overlap and cover their arched backs. Scale worms vary in size, typically ranging from 0.5 to 25 cm (about 0.2 to 10 inches) long. They possess a retractable proboscis with fingerlike projections and four horny jaws used for feeding. Halosydna is specifically mentioned as a common scale worm genus within the order Aphroditamorpha.12

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2 Britannica Sources
  1. scale worm
  2. annelid - Annotated classification

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