\Si`pho*no*stom"a*ta\, n. pl. [NL. See {Siphon},
and {Stoma}.] (Zo["o]l.)
(a) A tribe of parasitic copepod Crustacea including a large
    number of species that are parasites of fishes, as the
    lerneans. They have a mouth adapted to suck blood.
(b) An artificial division of gastropods including those that
    have siphonostomatous shells.