Helodon trochus
Helodon protus
Helodon newmani
Helodon mccreadiei
Helodon diadelphus
Helodon chaos
Helodon beardi
Helodon submulticaulis
Helodon rezidentsii
Helodon makarovi
Helodon onychodactylus
Helodon vernalis
Helodon pleuralis
Helodon perspicuus
Helodon gibsoni
Helodon decemarticulatum
Helodon susanae
Helodon clavatus
Helodon yezoense
Helodon sarurense
Helodon ferrugineum
Helodon rufum
Helodon rubicundum
Helodon phytofagus
Helodon pecticrassum
Helodon pamiricum
Helodon oligoaristatum
Helodon multicaulis
Helodon mesenevi
Helodon karibaense
Helodon kamui
Helodon kamtshaticus
Helodon irkutensis
Helodon intercalare
Helodon czenkanowskii
Helodon chechciri
Helodon candicans
Helodon buturlini
Helodon arshanense
Helodon aridus
Helodon apoina
Helodon alpestris
Helodon daisetsense
Helodon ferrugineus
Ten-articled black fly