Speciation in Darwin’s darklings: taxonomy and evolution of Stomion beetles in the Galápagos Islands, Ecuador (Insecta: Coleoptera: Tenebrionidae) Author Finston, Terrie L. Author Peck, Stewart B. text Zoological Journal of the Linnean Society 2004 2004-05-31 141 1 135 152 https://academic.oup.com/zoolinnean/article-lookup/doi/10.1111/j.1096-3642.2004.00115.x journal article 10.1111/j.1096-3642.2004.00115.x 0024-4082 5429630 STOMION RUGOSUM EC VAN DYKE Stomion rugosum Van Dyke, 1953: 80 . Holotype : type 7389 in CAS (examined). Type locality: Pinta (= Abingdon) Island . Label data: IX.1906 F.X. Williams. Franz 1985: 93 . Stomion rugosus Van Dyke, 1953: 81 (lapsus). Diagnosis: Length 6–8 mm , width 3–4 mm ; body broad, 2.0¥ longer than wide; body coarsely and rugosely punctured; pronotum slightly transverse, 1.5¥ wider than long, widest behind middle, nearly as wide at base; elytra with rugose ridges, very coarsely punctured both between and on top of ridges, some punctures anastomosing; dorsal tooth on right mandible present, moderately well developed. Distribution: Marchena and Pinta Islands. Bionomics: The species occurs from the littoral and arid zone from sea level up to transition zone forest at 400 m elevation, and is found in litter under shrubs and in forests. Adults have been collected in February, March and September. Examined: 176 specimens . THE ‘B GROUP’, A MONOPHYLETIC GROUP ON CENTRAL AND WESTERN ISLANDS, WHICH ARE MIDDLE AGED OR