anaspid

/uh-nas-pid/US // əˈnæs pɪd //

虾夷类,虾米,虾夷族,虾夷

Definitions

n.名词 noun

1
Paleontology.
- : any member of an extinct order, Anaspida, of small, freshwater jawless fishes of the Silurian and Devonian periods, characterized by a single nostril, narrow rows of scales, and, usually, an armor-plated head.