资料来源 : Webster's Revised Unabridged Dictionary (1913)

Thecosomata \The`co*so"ma*ta\, n. pl. [NL. See {Theca}, and
   {Soma}.] (Zo["o]l.)
   An order of Pteropoda comprising those species which have a
   shell. See {Pteropoda}. -- {The`co*so"ma*tous}, a.