The Collaborative International Dictionary of English v.0.48:

Lamellicornia \La*mel`li*cor"ni*a\, n. pl. [NL. See
   Lamellicorn.] (Zool.)
   A group of lamellicorn, plant-eating beetles; -- called also
   Lamellicornes.
   [1913 Webster]

WordNet (r) 3.0 (2006):

Lamellicornia
    n 1: scarabaeid beetles and stag beetles [syn: Lamellicornia,
         superfamily Lamellicornia]