Neighbour-joining tree of Jukes-Cantor distances among sequences of CO1 (alignment 450 bp using all sites) from Alaria available on GenBank as of 7 July 2021. Data from Alaria americana, including data from the present study, indicated by darker shaded cluster and white font. Sequences from A. alata are HM022221-3, KF751233-4, KP123416-20, KP123422-5, KX962374, KX962392, KX962395, KX962397-8, KX962402, KX962406, KX962415, KX962421, KX962433, KX962437, KX962454-5, KX962471-2, KX962481, KX962491, KY012317, MT103215-31; from Alaria sp. in Argentina KF572949, MH892076, MT328804-6; from Alaria sp. in Wisconsin, USA KT223036; from A. americana MZ605217-33 (present study) and MH536507 (indicated with an asterisk).