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Genus Colymbetes

Predaceous Diving Beetle - Colymbetes sculptilis - male Colymbetes incognitus - male Predaceous Diving Beetle - Colymbetes sculptilis - male Dytiscidae? - Colymbetes Dytiscidae ? - Colymbetes sculptilis 3024812 Dytiscid - Colymbetes Predaceous Diving Beetle - Colymbetes Predaceous Diving Beetle - Colymbetes sculptilis - female
Classification
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Coleoptera (Beetles)
Suborder Adephaga
Family Dytiscidae (Predaceous Diving Beetles)
Subfamily Colymbetinae
Tribe Colymbetini
Genus Colymbetes
Explanation of Names
Colymbetes Clairville 1806
Greek κολβητης 'diver'
Numbers
9 spp. in our area, 22 total(1); 7 in Canada(2)
Size
11-20 mm
Identification
Adults:
Eyes notched at antennal bases
Elytral sculpture consists of numerous transverse parallel grooves (unlike in Rhantus or Neoscutopterus)(2)
Colour: completely black to yellow-brown, pronotum may have spots and/or transverse medial bar
Larvae:
Head with no frontal horn
Sparse to no swimming hairs on abdominal segments 7 and 8
urogomphi with shorter secondary hairs in addition to 2 main whorls of hairs; with few to no short spine-like setae (separates from Rhantus)
antennomeres 4 & 3 subequal in length
Range
holarctic; throughout NA(2), more diverse in the north and west
Habitat
standing water, generally among emergent vegetation(2)
Food
predaceous on other aquatic life