Three new species of Macrelmis Motschulsky (Coleoptera: Elmidae: Elminae) from Southeastern Brazil with new definition of species groups to the genus Author Passos, Maria Inês Silva Dos Author Miranda, Gustavo Silva De Author Nessimian, Jorge Luiz text Zootaxa 2015 4058 2 195 210 journal article 39260 10.11646/zootaxa.4058.2.3 aef58d69-0e0c-4ad8-8e27-3a00ea2bc448 1175-5326 241270 7BF705F4-BB24-4BC4-9430-A2AB8A990DDF clypeata species group Hinton 1946 Diagnostic character : parameres and aedeagus of equal size, both short; parameres completely surrounds the aedeagus ( Figs. 5E, F ). Species: Macrelmis clypeata and M. isus . Distribution ( Fig. 6 ): Trinidad : Maracas ( Hinton 1936 ). Argentina : Cordoba, Jujuy, Misiones, Salta, San Luis, San Juan ( Manzo & Archangelsky 2001 ). Brasil : Goiás ( Barbosa et al . 2013 ), Rio de Janeiro ( Sampaio et al . 2012 ), Santa Catarina ( Hinton 1946 ). Bolivia : Sidras and Tarijá ( Manzo & Archangelsky 2008 ). Paraguay : Guairá ( Shepard & Aguilar Julio 2010 ). History of the group : Macrelmis clypeata was considered as closely related to M. tarsalis by Hinton (1936) . Afterwords, Hinton (1946) added M. isus to this set of species and formaly presented this group. He defined it as “having the apices of the elytra dehiscent, each elytron being separately rounded at extreme apex, and by the unusual secondary sexual characters of the male” ( Hinton 1946 ). Despite of this resemblances, the male genitalia of M. tarsalis differs considerably from that of M. isus and M. clypeata . So, only the last two species are considered to compose the clypeata group.