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stomatognath
stomatognath n. 
/ˈstɒmətə(ɡ)naθ/, /ˈstɑmədə(ɡ)ˌnæθ/ [Greek γνάθος jaw] a generic term for the hard structures or ‘teeth’ in the stomodæum of various classes of animals, as molluscs, crustaceans, annelids, rotifers, etc.
Brit. /ˈstəʊmətə(ɡ)naθ/
, /ˈstəʊmətə(ɡ)naθ//ˈstɒmətə(ɡ)naθ/U.S. /ˈstoʊmədə(ɡ)ˌnæθ/
, /ˈstoʊmədə(ɡ)ˌnæθ//ˈstɑmədə(ɡ)ˌnæθ/ΚΠ
1900 W. B. Benham in Proc. Zool. Soc. 982 (note) I would suggest..‘stomatognath’ as a convenient term by which to refer to the various chitinous, or calcified, or siliceous ‘teeth’ or ‘jaws’ occurring as specialized thickenings of the lining of the stomodæum.
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