Illinois Natural History Survey - University of Illinois

Amphizoa LeConte 1853



Key to Species of Amphizoa Adults

(after Kavenaugh 1986 and Peiyu & Stork 1991)


  1. Elytron flattened medially, with or without distinct carina on fifth interval.

    Elytron evenly convex or slightly concave paralaterally, without carina.


  2. Elytron with blunt but distinct carina on fifth interval, area medial to carina elevated, flat, area lateral to carina slightly concave, North America.
    Amphizoa lecontei Matthews 1872

    Elytron without carina, but slightly concave laterally in anterior half, China.
    Amphizoa sinica Peiyu and Stork 1991:254


  3. Prosternal intercoxal process short, round; body form narrower; specimen from southwestern China.
    Amphizoa davidi Lucas 1882

    Prosternal intercoxal process long, spatulate; body form relatively broader; specimen from western North America.


  4. Elytral silhouette broad basally and distinctly narrowed subapically, elytral surface only faintly rugose in lateral half; pronotum broadest at base, with lateral margins not or only sloghtly crenulate.
    Amphizoa striata Van Dyke 1927

    Elytral silhouette subovoid, slightly narrowed basally, slightly broader subapically, elytral surface moderately or coarsely rugose in lateral half; pronotum at least as broad at middle as at base, with lateral margins markedly crenulate.
    Amphizoa insolens LeConte 1853


Literature Cited

Kavanaugh, D. H.

  • 1986. A systematic review of amphizoid beetles (Amphizoidae: Coleoptera) and their phylogenetic relationships to other Adephaga. Proc. California Acad. Sci. 44(6):67-109.


Peiyu, Y., and N. E. Stork.

  • 1991. New evidence onthe phylogeny and biogeography of the Amphizoidae: Discovery of a new species from China (Coleoptera). Syst. Entomol. 16(2):253-256.

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