Revision of the Subfamily Helophorinae of the Nearctic Region (Coleoptera, Hydrophilidae)Historical review; Techniques; Systematics: Subfamily helophorinae; Genus helophorus fabr.; Key to bubgenera of helophorus fabr.; Subgenus helophorus fabr.; Subgenus Rhopalelophorus Kuw; Subgenus gephelophorus shp; Subgenus Cyphelophorus kuw; Subgenus orphelophorus d'Orch. |
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10th interval aedoeagus Angus anteriorly apex Fig apical areolate auricollis basal piece Bionomics British Columbia C.A. Frost characters Coleoptera Creek CUIC Cyphelophorus d'Orchymont DBUM described the species distinctly Distribution of Helophorus dorsal elongate elytral intervals elytron epicranial suture epipleuron genus granulose punctation H.B. Leech CASC H.P. Chandler CASC habitat habitat requirements head and pronotum Helophorus Helophorus Rhopalelophorus holotype Hydrophilidae internal intervals J.B. Wallis CNCC Kuwert Lake last segment lateral margins LeConte lectotype ledatus M.H. Hatch OSUO Manitoba McCorkle MCZC median lobe metallic reflections metepisternum moderately long MUNC narrowed posteriorly Nearctic Northwest Territories Oregon OSUO P.J. Spangler USNM parameres parasplendidus paratypes piceous pronotal pronotum Pronotum Fig pseudepipleuron River segment of maxillary slightly Smetana CNCC Spec species of Helophorus stem of epicranial striae strongly narrowed subgenus suprapleural area swimming hairs synonymy testaceous transversely convex Type material various dates ventral view visible in ventral W.J. Brown CNCC Yukon Territory