ID Aids
Here we display pairs or groups of morphologically close species, seeing these together can highlight diagnostic features but just as importantly we hope to show how infraspecific variation can negate the usefulness of characters which might initially seem objective. Comparing a specimen with type material is the best way either to identify or to suggest whether further work e.g. dissection is necessary but as most of us do not have access to a reference collection we are providing what we consider to be the next best thing i.e. colour photographs along with specific guidance.

We also attempt to achieve a broader usefulness by displaying characters used in established keys where we have found these to be ambiguous

For those without extensive experience of identifying Coleoptera a read through the identification discussion in the Techniques section will be useful before embarking upon the following examples.

Specimens pictured on the following pages have been identified by the WCG, that is to say that from whatever source the specimens originated, unless otherwise stated, they have been verified by Mr. D.Hodges and/or Mr. D.Murray.
Species Pairs
Apionidae
 Perapion violaceum/hydrolapathi
 Pirapion immune/Protopirapion atratulum
Byturidae
 Byturus ochraceus/B.tomentosus
Cantharidae
 Cantharidae nigricans/C.pellucida
 Cantharidae cryptica/C.pallida
Carabidae
 Amara communis/convexior
 Amara ovata/similata
 Carabus problematicus/violaceus
 Nebria brevicollis/salina
 Pterostichus nigrita/P.rhaeticus
Chrysomelidae
 Apteropeda globosa/A.orbiculata
 Galerucella nymphaeae/G.sagitttariae
 Lema cyanella/Oulema obscurus
 Neocrepidodera transversa/ferruginea
 Oulema melanopus/rufocyanea
 Sphaeroderma rubidum/S.testaceum
 Timarcha goettingensis/T.tenebricosa
Coccinellidae
 Rhyzobius litura/R.chrysomeloides
Curculionidae
 Coeliodes ruber/rana/transversealbofasciatus
 Phyllobius roboretanus/P.virideaeris
Erotylidae
 Triplax aenea/Tetratoma fungorum
Histeridae
 Plegaderus vulneratus/P.dissectus
Malachiiidae
 Malachius bipustulatus/Cordylepherus viridis
Monotomidae
 Rhizophagus dispar/R.bipustulatus
Nitidulidae
 Pocadius adustus/P.ferrugineus
Scarabaeidae
 Aphodius contaminatus/A.obliteratus
 Aphodius prodromus/A.sphacelatus
Tetratomidae
 Triplax aenea/Tetratoma fungorum
Keys
Antennae
Guides