Systematic review and cladistic analysis of the genus Eusarcus Perty 1833 (Arachnida, Opiliones, Gonyleptidae)


Link to Full Text

Download Full Text

Publication Date

January 2010


usarcus Perty 1833 is one of the oldest described genera of Pachylinae, comprising 36 species distributed from northeastern to southern Brazil (including the central west region), northeastern Argentina, eastern Paraguay and Uruguay. The genus is reviewed and a new classification is proposed based on a cladistic analysis. A cladistic analysis was performed with the 34 valid species of Eusarcus and 11 species belonging to certain Gonyleptidae subfamilies. The data matrix has 67 characters: 14 from dorsal scutum and pedipalp, 38 from male legs and 15 from male genitalia. Two equally parsimonious trees were found (L=319; C.I.=0.26, R.I.=0.61). Pygophalangodus gemignanii uruguayensis Ringuelet 1955a and Pygophalangodus gemignanii gemignanii Mello-Leitão 1931b are here elevated to the category of species, and the following new combinations are proposed: E. catharinensis (Mello-Leitão 1927); E. berlae (Mello-Leitão 1932); E. gemignanii (Mello-Leitão 1931b); E. signatus (Roewer 1949); E. sooretamae (Soares & Soares 1946a); E. uruguayensis (Ringuelet 1955a). The following generic synonymies are proposed: Eusarcus Perty 1833 (type species E. armatus Perty 1833) = Metagraphinotus Mello-Leitão 1927 (type species M. catharinensis Mello-Leitão 1927), Pareusarcus Roewer 1929 (type species P. corniculatus Roewer 1929), Pygophalangodus Mello-Leitão 1931b (type species P. gemignanii gemignanii Mello-Leitão 1931b) and Antetriceras Roewer 1949 (type species A. signatus Roewer 1949). The following specific synonymies are proposed: Eusarcus hastatus Sørensen 1884 = Pucrolioides argentina Roewer 1913, E. guimaraensi H. Soares 1945, Jacarepaguana pectinifemur Piza 1943, Canestrinia canalsi Mello-Leitão 1931a, and E. maquinensis H. Soares 1966b; E. armatus Perty 1833 = E. curvispinosus Mello-Leitão 1923b, and Enantiocentron montis Mello-Leitão 1936; Eusarcus catharinensis (Mello-Leitão 1927) = E. antoninae Mello-Leitão 1936, E. perpusillus Mello-Leitão 1945, E. tripos Mello-Leitão 1940, and Metagraphi


Arachnida, Brazilian Fauna, Taxonomy, Neotropical Harvestmen, Pachylinae




Zootaxa, Vol. 2693, no. 1 (2010-01-01).