What's the difference between shipworm and teredinid?

Shipworm

Definition:

(n.) Any long, slender, worm-shaped bivalve mollusk of Teredo and allied genera. The shipworms burrow in wood, and are destructive to wooden ships, piles of wharves, etc. See Teredo.

Example Sentences:

(1) n., the second species of the genus, was found in the kidney of Clinopegma unicum in the Okhotsk Sea while the type species is known from the stomach of the shipworm Teredo utriculus caught in the Gulf of Naples.
(2) Bacterial cultures isolated from the gland of Deshayes of marine shipworm (Psiloteredo healdi) produced extracellular endoglucanase activity when cultured with 1% cellulose.
(3) It has been proposed that a bacterium isolated from the gills of shipworms (teredinid mollusks) is, by virtue of its ability both to degrade cellulose and to fix dinitrogen, the symbiont that enables these mollusks to utilize wood as their principal food source.
(4) An extracellular enzyme preparation from shipworm bacterium cultures dramatically increased reducing sugar content of carboxymethylcellulose (CMC3), but did not solubilize sugar from particulate cellulose.
(5) In situ localization of the bacterial symbiont in tissue sections of the shipworm Lyrodus pedicellatus was determined by using a 16S rRNA-directed oligodeoxynucleotide hybridization probe specific for the bacterium isolated from shipworm gill tissue.