astacian

astacian Zool.

(əˈsteɪʃ(ɪ)ən)

[f. L. astac-us, Gr. ἀστακός lobster, crayfish + -ian.]

A crustacean of the lobster kind. astacite (ˈæstəsaɪt), astacolite (əˈstækəlaɪt), a fossil crustacean resembling a lobster or crayfish (Penny Cycl. 1834).