Microstemmatodes occidentalis ( Villiers, 1973 )

Krüger, Andreas, 2019, Notes on Afrotropical Enicocephalidae and Reduviidae (Hemiptera: Heteroptera) with emphasis on vehicle-mounted net samples from Liberia, West Africa, Zootaxa 4688 (2), pp. 232-248: 238

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Microstemmatodes occidentalis ( Villiers, 1973 )


Microstemmatodes occidentalis ( Villiers, 1973) 

( Figs. 3E, FView FIGURE 3)

Material examined: LIBERIA: Bong county, trip Liberia Research Unit (Bong Mine)— Dam 12, 21.iv.1989, 6:23– 6:36 pm, vehicle-mounted net, leg. Rolf Garms (1 ♀); Trip  Bong town—Menla, Men creek , 6°48′N 10°21′W, 11.v.1989, vehicle-mounted net, leg. Rolf Garms (1 ♂)GoogleMaps  .

Distribution: New for Liberia. Guinea, Ivory Coast.

Remark: The first demonstration of the male paramere ( Fig. 3FView FIGURE 3) in comparison with that of M. atrocyanea (Signoret, 1858)  ( Fig. 3HView FIGURE 3) herewith confirms separate species status. The paramere’s stem is narrower, the apical process in a curvate angle instead of a rather sharp bend. Originally a monotypic genus, the five presently known species were keyed in Villiers (1973).

Nagusta  sp. near N. carayoni Villiers, 1949 

( Fig. 4AView FIGURE 4)

Material examined: LIBERIA: Bong county, BM tailings pond area, Dam 12, 6°46′15″N 10°18′33″W, 29.– 30.v.1989, at light, leg. Rolf Garms (1 ♀)GoogleMaps  .

Distribution: New for Liberia. Cameroon, Ghana, Guinea.

Remark: The diversity of the predominantly Afrotropical genus has rapidly grown from four species ( Bergroth, 1907) to eight ( Villiers, 1949b), and eventually to 28 ( Villiers, 1967). Using and combining the available keys ( Bergroth, 1907; Villiers, 1949b, 1951, 1967) this specimen matches N. carayoni  . However, there are the following differences: tubercles on posterior lobe of pronotum rather high, at their base wider than space between them; first antennal segment apically not particularly reddish. The Liberian specimen shows also some resemblance with N. saegeri (Villiers, 1964)  , but the latter bears a laterally dilated connexivum, which is not present in N. carayoni  .


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