Membracidae of Gabon: the genus Hamma Buckton, 1905 (Hemiptera: Auchenorrhyncha) with description of three new species Author Loudit, Sandrine Mariela Bayendi Author Durante, Antonio Author Susini, Antonio text Zootaxa 2014 3838 3 323 346 journal article 10.11646/zootaxa.3838.3.5 fea14af6-3b11-4f5c-9a72-046eafd98791 1175-5326 252079 CDE10850-BA34-4C3B-924D-16A90AD521CD Hamma Buckton, 1905 Hamma Buckton, 1905 ; Transactions of the Linnean Society of London , series 2, IX, 9: 330. Amitrochates Distant, 1916; The Annals and Magazine of Natural History , VIII, 17: 327 ( type species Amitrochates grahami Distant, 1916 ); synonymized in Capener 1955 : 376. Type species Hamma nodosum Buckton, 1905 Geographical range. The genus Hamma is entirely Afrotropical ( Wallace & Deitz 2004 ). Diagnosis (mainly based on Buckton 1905 and Capener1968 ). Genus of tribus Centrotini Amyot and Serville, 1843; pronotum convex, tuberculate; posterior pronotal process bisinuate, and bi- up to quadrinodate, robust and arching over scutellum; scutellum wider than long, basally a little convex, slightly apically upturned and broadly concavely emarginate. Tegmina with a large pterostigma, and five apical and two discoidal cells.