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Lyrodus medilobatus
Image courtesy of Wikimedia Commons and the CC BY-SA 3.0 License. This is not an image of Lyrodus medilobatus, but shows shipworm (Teredo navalis) damage to a piece of timber.
Lyrodus medilobatus
Taxonomic Group: Mollusks-Bivalves


Lyrodus medilobatus is a shipworm which belongs to the family Teredinidae. Shipworms are marine clams which are highly modified for boring into wood. This species was first described in Hawaii, but its origin is unknown. It has a wide distribution in the Indo-Pacific, from Hawaii and the Galapagos to New Zealand, Australia, and India. In the Atlantic, where we consider it introduced, this shipworm has been collected in Bermuda, the US Virgin Islands, and Florida; however it is not established in these areas. It is an abundant wood-borer in the tropics, found in mangroves and on wood structures. No impacts have been reported for this species.

* This species is not currently established in North American waters.

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Fofonoff PW, Ruiz GM, Steves B, Simkanin C, & Carlton JT (2018)
National Exotic Marine and Estuarine Species Information System.
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Marine Invasions Lab
Smithsonian Environmental Research Center

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