On the genus Hamma Buckton, 1905 (Hemiptera: Auchenorrhyncha) in Equatorial Africa, with descriptions of three new species Author Durante, Antonio EE002752-B8CA-40FA-A6B2-02B46375D850 Museo di Storia naturale del Salento, S. P. Calimera-Borgagne, Km 1, 73021 Calimera, Lecce, Italy. antonio.durante@msns.it Author Loudit, Sandrine Mariella Bayendi DB43D625-BCF2-40B5-846A-C34B077754A8 Institut de Recherches Agronomiques et Forestières, BP 13 260, Libreville, Gabon. sbayendiloudit@gmail.com Author Susini, Antonio BA4917CF-EE9E-4CC2-B441-82C2019D7052 Corso Porta Ticinese, 42. 20123, Milano, Italy. antoniosusini@hotmail.it text European Journal of Taxonomy 2021 2021-05-06 748 1 89 107 http://dx.doi.org/10.5852/ejt.2021.748.1345 journal article 7028 10.5852/ejt.2021.748.1345 f24a08b6-a24f-4c08-81e5-ae40f68bacd6 2118-9773 4745153 F177330C-76B8-4062-B2F3-4C7ADD012F2E Hamma caneparii sp. nov. urn:lsid:zoobank.org:act: CC05B142-B36F-4449-B12D-DE869B08470F Figs 3 , 4D , 5D Diagnosis Species belonging to the genus Hamma with thorax a mosaic of russet brown and black, pronotum smooth and metopidium not densely tuberculate; suprahumeral horns with a laterally pointing thorn; a posterior process with four nodes, V-shaped in lateral view between the second and fourth nodes; last node roundish in dorsal view, ending in a well-developed terminal spine. Pterostigma twice as long as broad. Differential diagnosis The general colour (a mosaic of russet brown and black) is diagnostic, heimi and nigrum sp. nov. being black, and spinellii n. sp being light brown. Other diagnostic characters with respect to spinellii sp. nov. are: – the narrow width relative to height of the basal element of the suprahumeral horns (frontal view) ( Fig. 4D ): in caneparii sp. nov. the w/h ratio is 0.66; in spinellii sp. nov. the w/h ratio is 1; – caudal node of the posterior process ⅔ of the head width in caneparii sp. nov. ; half the head width in spinellii sp. nov. (dorsal view); – anchor-like third node ( Fig. 5D ) broader than in spinellii sp. nov. (dorsal view); – length of the posterior process not exceeding the abdominal terminalia in caneparii sp. nov. ; clearly exceeding abdominal length in spinellii sp. nov. (lateral view); – pterostigma ( Fig. 5D ) larger in caneparii sp. nov. : l/w ratio 2.4 in caneparii sp. nov. ; 3.4 in spinellii sp. nov. Other diagnostic characters with respect to heimi and nigrum sp. nov. are: – upper margin of the head ( Fig. 4D ) roughly square; – metopidium ( Fig. 4D ) tuberculate; – suprahumeral horns ( Fig. 4D ) with a robust straight thorn, not curving upwards in frontal view; – anchor-like third node posteriorly prolonged; rhomboidal or roughly circular in nigrum sp. nov. and heimi . Etymology The species is dedicated to our friend Claudio Canepari, Milano, a specialist in Coccinellidae . Material examined Holotype GABON • ♀ ; Ogooué Lolo , Inzambò (Iboundji); 0.1°6′21.7″ S , 0.11°51′17.8″ E ; 427 m a.s.l. ; 24 Nov. 2012 ; A. Susini leg.; MSNS . Description MEASUREMENTS. Holotype total length: 4.6 mm ; pronotal length: 4.6 mm ; tegminal length: 4.1 mm . HEAD. Entirely black, convex, punctate; vertex almost twice as wide as high; carina not distinguishable; shallow concavity medially above the ocelli; upper margin sinuate; ventral margin W-shaped with lower parts not very pronounced; ocelli slightly above the centro-ocular line. Frontoclypeus russet and pear- Fig. 3. Hamma caneparii sp. nov. , holotype, ♀, Gabon, Ogoouè Lolo, Inzambò (Iboundji), m 427, 0.1°6′21.7″ S, 0.11°51′17.8″ E, 24 Nov. 2012, A. Susini leg. (MSNS). Fig. 4. Morphology. Left suprahumeral horn and left supraocular callosity, frontal view. A . Hamma heimi Boulard, 1968 . B . Hamma nigrum sp. nov. C . Hamma spinellii sp. nov. D . Hamma caneparii sp. nov. Figures are not to scale. shaped, lateral lobes completely fused to frontoclypeus with margins not distinguishable; rostrum and antennae ochraceous. PRONOTUM. Mosaic of russet brown patches with one triangular black area at the base of the metopidium and black areas behind the suprahumeral horns; punctate, naked; ochraceous tuberculate areas at the dorsal border of the metopidium; metopidium one and a half times wider than high, median carina percurrent and unpunctate, straight; elongated supraocular callosities, slightly arcuate, not punctate; humeral angles prominent and blunt; suprahumeral horns well developed, with a tower-shaped base (shorter than in spinellii sp. nov. ), tuberculate, with a robust brown, black-tipped thorn pointing outwards. Posterior process patchy, black and russet in colour, punctate, emerging posteriorly from the pronotum and continuously from the posterior margin; sinuate in lateral view, with four nodes, the first of which (proximal) almost spherical, elongated posteriorly in dorsal view; second node small, dome-shaped in lateral view (flattened in dorsal view) with four small dorsal spines; third node anchor-like in dorsal view with two (left) or one (right) small spines at the end of the lateral arms; fourth node subspherical, slightly larger than the first, with many spines and a strong terminal spine at the caudal end; dorsal and ventral carinae continuous, of the same colour. A few spines along the dorsal carina and dorsally and ventrally along the trunk of the posterior process between the third and fourth nodes, some of which bearing a very thin light apical seta. SCUTELLUM ( Fig. 5 ). Same colour as the pronotum, punctate, with the base longer than the height, emarginate with scutellar apices light, acute with a few translucent setae; base with a triangular swelling except at the corners; lateral corners of the swelling with a tuft of small brilliant whitish setae. FOREWING. About two and a half times as long as wide (l/w ratio 2.57), hyaline; basally sclerotized, punctate, amber and brown in colour. Pterostigma trapezoidal with rounded corners, dark brown in colour; venation amber except for the median, cubital and anal veins in the median area, which are brown; large brown shaded trapezoidal patch extending from costa to inner margin in the median area; S-shaped patch extending from costa to anal angle with light grey-brown anterior half and brown posterior half. Presence in the right forewing of a small supplementary discoidal cell between the second apical cell and the first discoidal cell. LEGS. Ochreous yellow, praetarsi brown. ABDOMEN. Tergites black and brown with punctation and lighter caudal borders; sternites brown with borders of the same colour covered by translucent setae.