Macropygium graziae Silva & Campos,

Silva, Layse Mitsue Harada Da & Campos, Luiz Alexandre, 2021, Revision of Macropygium Spinola, 1837 (Hemiptera: Pentatomidae: Ochlerini) with the revalidation of three species and the description of one new species, Zootaxa 4958 (1), pp. 605-627: 622-626

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Macropygium graziae Silva & Campos

sp. nov.

Macropygium graziae Silva & Campos  , sp. nov.

( Figs 2C–DView FIGURE 2; 4M–PView FIGURE 4; 5J–L, W–YView FIGURE 5; 6DView FIGURE 6; 7DView FIGURE 7; 13View FIGURE 13; Table 1)

Holotype. Male. Labels: LA PAZ (Dep. San Javier) / Córdoba. / 1-20. I. 1929. C. Bruch ( MACN). 

Paratypes. ARGENTINA, Buenos Aires, Buenos Aires, 1♀ [-34.599, -58.381] ( MACN)GoogleMaps  ; Córdoba, La Paz, 2♀, 1928 ( MACN)  ; Corrientes, Alvear, 1♀, 1991 ( DAR)  ; Entre Rios, 4♀, 1996 ( JEE)  ; 1♀, 1991 ( DAR)  ; BRAZIL, Santa Catarina, Urussanga , 2010 ( UFRG) [-28.499, -49.292]GoogleMaps  ; Rio Grande do Sul, Guaíba , 5♀, 1♂, 1974 [-30.113, -51.325] (1♀ MCNRS, 4♀, 1♂ UFRG);GoogleMaps  Taim, 2♀, 1982 ( UFRG) 1♀, 1985 ( MCN) [-32.538, -52.540];GoogleMaps  Pelotas, 1♀, 2005 ( UFRG) [-31.624, -52.332]GoogleMaps  .

Etymology: the species is named in honor to Jocelia Grazia, for her friendship, guidance, and contributions to the taxonomy of Neotropical pentatomids; noun in apposition.

Distribution: Brazil, Argentina ( Fig. 13View FIGURE 13).

Diagnosis. Antennae four-segmented, length of the second antennomere equals the third and fourth antennomeres combined; lateral projection of dorsal rim of pygophore broad and apart from the posterolateral angle; middle portion of posterior margin of valvifers VIII projected over laterotergites IX, lateral angles not projected.

Male. Genitalia: conical projection of ventral rim of pygophore bifurcate at apex; posterolateral angles acute, medial projection of posterolateral angles broadly rounded and tumescent, almost attaining the dorsal limit of segment X in lateral view; lateral projection of dorsal rim large, subtriangular, apart from the posterolateral angle, and partially covering the medial projection in lateral view; segment X higher than wide in posterior view, and longer than wide in ventral view ( Fig. 4M–PView FIGURE 4); parameres short, apical projection broad with a second apical process ( Fig. 5J–LView FIGURE 5), largest axis of head less than half the length of stem; vesica without lateral projections; ductus seminis distalis thin, helicoidal in the middle portion ( Fig. 5W–YView FIGURE 5).

Female. Genitalia: Valvifers VIII partially covering the basal portion of laterotergites IX; middle portion of posterior margin of valvifers VIII projected over laterotergites IX, lateral angles not projected; laterotergites IX with mild lateral depression ( Fig. 6DView FIGURE 6). Folds of valvulae IX occupying almost half the valvulae surface, with few villi, conical microsculptures barely visible; ring sclerites diameter equals the width of vaginal intima, weakly sclerotized and connected to the thickening of vagina intima, this weakly sclerotized; orificium receptaculi about 2/3 the width of vaginal intima ( Fig. 7DView FIGURE 7).

Comments. Macropygium graziae  occurs in southern Brazil and northern Argentina ( Fig. 13View FIGURE 13), partially overlapping with M. reticulare  and M. spinolae  . Macropygium graziae  can be distinguished from all Macropygium  species by the four-segmented antennae; by the lateral projections of the dorsal rim of pygophore broad and placed apart from the posterolateral angles of the pygophore ( Fig. 4OView FIGURE 4); and by the middle portion of the posterior margin of valvifers VIII projected over laterotergites IX ( Fig. 6DView FIGURE 6).


Museo Argentino de Ciencias Naturales Bernardino Rivadavia


Plant Pathology Herbarium


Instituto de Biologia


McNeese State University