Intertaxon relationships
Orobanche owerini (Beck) Beck
Catapion seniculus (W. Kirby, 1808) 
Holotrichapion pisi (Fabricius, 1801)
Protapion fulvipes (Geoffroy in Fourcroy, 1785)
Protapion trifolii (Linnaeus, 1768)
Sitona ambiguus Gyllenhal, 1834
Sitona hispidulus (Fabricius, 1777)
Sitona lineatus (Linnaeus, 1758) - Pea Leaf Weevil
Sitona sulcifrons (Thunberg, 1798)
Synapion ebeninum (Kirby, 1808)
Tychius cuprifer (Panzer, 1799)
Tychius lineatulus Stephens, 1831
Tychius picirostris (Fabricius, 1787)
Tychius polylineatus (Germar, 1823)
Tychius pusillus Germar, 1842
Tychius stephensi Schönherr, 1835
consumer (larval stage only)
Brachypera zoilus (Scopoli, 1763) - Clover Leaf Weevil
Hypera melancholica (Fabricius, 1792)
Hypera meles (Fabricius, 1792)
Hypera miles (Paykull, 1792)
Hypera postica (Gyllenhal, 1813)
Links and literature
[1] Máca J. (2017): Neglected Eriophyoid Mites with Conspicuous Galls: Concealed Biodiversity, Živa 3/2017, 133 [as Trifolium]
Máca J. (2017): Neglected Eriophyoid Mites with Conspicuous Galls: Concealed Biodiversity, Živa 3/2017, 133 [as Trifolium]