Macromalthinus globuliventris Brancucci, 1981

Biffi, Gabriel & Constantin, Robert, 2018, A revision of Macromalthinus Pic, 1919 with description of six new species (Coleoptera: Cantharidae: Chauliognathinae), Papéis Avulsos de Zoologia (Pap. Avulsos Zool., S. Paulo) 58, pp. 1-22 : 17

Macromalthinus globuliventris Brancucci, 1981 ( Fig. 51 )

Macromalthinus globuliventris Brancucci, 1981a: 266 ; Constantin & Chaboo, 2016: 200.

Material examined: PARATYPE: PERU. Valle Chanchamayo, 800 m, 13.VIII.1951, Weyrauch leg. (1 ♂ NHMB) ( Fig. 51 ).

Other specimens: “17128, Amazon, Degand, Fry coll, 1905-100” (1 ♂ BMNH) ; “34465, Amazon, Fry coll, 1905-100” (1 ♂ BMNH) .

Differential diagnosis: Head black; antenna brown, except antennomeres I-III and VII-VIII (sometimes IX), testaceous; pronotum pale yellow, elytra black with apical yellow patches; males: fore femur swollen, with rounded ventral tooth; ventrite IV with a pair of protuberances near posterior margin; ventrite VIII compressed apically, with longitudinal ridge and an arched, left transversal ridge; aedeagus with right prolongation of tegmen broadly projected dorsally; left setiferous prolongation vestigial, with a tuft of setae; females: abdominal ventrite VII long, posterior margin slightly projected.

It differs from all the other species by having a pair of protuberances on ventrite IV of males.

Distribution: Peru. The non-type studied specimens are labelled only as ‘Amazon’, and no other explicit locality information is available ( Fig. 66 ).

Figures

Figures 49-54: Type specimens of Macromalthinus species. (49) M. belemensis Brancucci,1981 (holotype, MPEG).(50) M. brasiliensis (Pic,1906) (= Maronius brasiliensis Pic,1906 (lectotype,MNHN).(51) M. globuliventris Brancucci,1981 (paratype,NHMB).(52) M. maximiceps Pic,1919 (lectotype,MNHN).(53) M.santaremensis Brancucci,1981 (holotype,NHMB).(54) M.schmidli Constantin,2010 (holotype,NHMB).Scale bars:2.0 mm.

Figures 66-69: Distribution of Macromalthinus species. (66) Distribution of Macromalthinus species in South America. (67) Distribution of M. brasiliensis in Brazil.(68)Distribution ofM.maximiceps inFrench Guiana.(69)Distribution of M.guyanensis sp.nov.,andM.orapuensis sp.nov.inFrench Guiana.Background maps of Figs.66-67 by NaturalEarth (available at:www.naturalearthdata.com), and Figs.68-69 byEric Gaba.