Rhagodera, Dejean, 1835

Krinsky, William L., 2015, A New Species ofRhagoderaMannerheim (Coleoptera: Zopheridae: Colydiinae) from San Clemente Island, California, The Coleopterists Bulletin 69 (2), pp. 293-296 : 295

KEY TO THE SPECIES OF RHAGODERA

[The elytra have three costae between the sutural costa and the margin. The costa closest to the sutural costa is designated costa 1.]

1. Epipleural fold ending near middle of ventrite IV and replaced thereafter by a thin carina composed of small tubercles ( tuberculata group) ....................................2

1′. Epipleural fold reaching elytral apex ( costata group)...........................................................4

2. Costa 2 contiguous from base to near apex, or if interrupted by short gaps, alignment of intact costal sections is maintained ( Fig. 2 ) .......... Rhagodera tuberculata Mannerheim

2′. Costa 2 absent or broadly interrupted in apical third................................................................. 3

3. Costa 2 absent (disjunct tubercles present in non-linear formation) except for short ridge on distal 1/5 of elytron ( Fig. 4 ); subantennal groove present................................................ ......... Rhagodera co s taefragmenta Krinsky, new species

3′. Costa 2 contiguous for 2/3 of length followed by a broad interruption before apical portion of costa ( Fig. 3 ); subantennal groove absent... ........................ Rhagodera interrupta Stephan

4. Pronotum with lateral margin sinuate before distinct hind angle; small, round prominence present between discal costa and lateral margin. Junction of elytral costae 1 and 2 near apex noticeably raised, higher than either costa. Arizona ............... Rhagodera costata Horn

4′. Pronotum with lateral margins evenly rounded, hind angles indistinct; prominence between discal costa and lateral margin absent. Junction of elytral costae 1 and 2 near apex not noticeably raised. Texas ................................... ........................... Rhagodera texana Stephan

Figures

Figs. 2–4. Comparison of costa 2 in three species of Rhagodera. 2) R. tuberculata; 3) R.interrupta; 4) R. costaefragmenta.