An updated classification of the jumping plant-lice (Hemiptera: Psylloidea) integrating molecular and morphological evidence Author Burckhardt, Daniel 2FA5C7E5-D28E-4220-9796-02717E892B1D Naturhistorisches Museum, Augustinergasse 2, 4001 Basel, Switzerland. daniel.burckhardt@bs.ch Author Ouvrard, David 2748132A-5D53-4BBA-9E33-F2723DCAAF19 ANSES, Plant Health Laboratory, Entomology and invasive plants unit, 755 avenue du campus Agropolis, CS 30016, 34988 Montferrier-sur-Lez Cedex, France. david.ouvrard@anses.fr Author Percy, Diana M. 84F3C908-9927-40A6-BBBF-6951B7736278 Department of Botany, University of British Columbia, 6270 University Boulevard, Vancouver V 6 T 1 Z 4, Canada. diana.percy@ubc.ca text European Journal of Taxonomy 2021 2021-03-05 736 137 182 http://dx.doi.org/10.5852/ejt.2021.736.1257 journal article 10.5852/ejt.2021.736.1257 64d18d39-b7e3-4331-9a2a-354b0d894546 2118-9773 4594332 F2976039-934E-46BE-B839-4D28C92C871F Family * Carsidaridae Crawford, 1911 , sensu novo Comments In both mtg trees the monophyly of Carsidaridae and Pachypsylla is strongly or very strongly supported. Carsidaridae + Pachypsylla (Pachypsyllinae) and Homotomidae form a poorly supported sister group in the AN tree and both families are included in an unresolved basal assemblage in the CC tree. In the molecular analyses by Cho et al . (2019) , Celtisaspis (Pachypsyllinae) is recovered as weakly supported sister-group of Homotomidae , rather than Carsidaridae , and the monophyly of Carsidaridae , Celtisaspis and Homotomidae is well supported. Hollis & Broomfield (1989) listed two putative morphological synapomorphies to link Carsidaridae and Homotomidae : 1) the presence of a pair of large tubercles on the metapostnotum, and 2) all three ventral sense organs of the metafemur in a basal position. These characters are present also in Pachypsyllinae , though the tubercles on the metapostnotum are relatively small in Celtisaspis . Cho et al . (2019) mention the bipartite male proctiger as a putative synapomorphy of Homotomidae + Pachypsyllinae . As in Aphalaridae , the three taxa discussed here form, depending on the type of analysis, an unresolved basal (paraphyletic) assemblage or a monophylum with contradicting relationships between the constituent groups. For reasons of consistency, we include the three groups in the single family Carsidaridae . The concept of Carsidaridae by Burckhardt & Ouvrard (2012) is broadened here to include also Homotomidae and Pachypsyllinae which is transferred from Aphalaridae .