Dichelocentrum alkadanum ( Linnavuori & van Harten, 2005 ) Gapon, D. A., 2014

Gapon, D. A., 2014, Revision of the genus Polymerus (Heteroptera: Miridae) in the Eastern Hemisphere. Part 1: Subgenera Polymerus, Pachycentrum subgen. nov. and new genus Dichelocentrum gen. nov., Zootaxa 3787 (1), pp. 1-87 : 85

5. Dichelocentrum alkadanum ( Linnavuori & van Harten, 2005) comb. nov.

( Figs 35 M–O ; 36 C, H ; 39 D ; 42 I )

Polymerus (Polymerus) alkadanus Linnavuori & van Harten, 2005: 87–89 , figs 2,3.

Material examined. Holotype. Yemen, Al Kadan , Oct. 2001, van Harten, Abdul-Hag, female ( NMWC).

Paratypes: the same data as above, 2 females *; Yemen, Sana´a, Suq Bani Mansour , 14 Nov.–28. Dec. 2001, 1 female ( NMWC). A single male from the type series is lost: it is absent in the collection of R. Linnavuori, in AMNH and NMWC .

Diagnosis. Recognised by the dark colouration and large size of the body ( Fig. 42 I ). This species can be confused with dark specimens of D. ornatifrons in colouration, but differs from the latter species by dark brown cuneus and absence of reddish spots on membranal veins and also by shape of parameres and smaller ratio of length of second antennal segment to width of pronotum (1.21–1.26 vs. 1.45 in D. ornatifrons ).

Right and left parameres are figured in the paper of Linnavuori & van Harten (2005). Hypophysis of right paramere is similar to those of D. longirostre and D. flora , from latero-posterior view looks almost rectangular and wider than in the latter two species ( Fig. 35 M, N ). Hypophysis of left paramere in the picture is rather short, with evenly convex superior margin, not concave before apex and with inferior margin as in D. transvaalicum sp. nov.; extreme apex of hypophysis is figured as rather wide ( Fig. 35 O ).

Vesica. Superior margin of posterior branch of spicule on figures of Linnavuori & van Harten (2005) looks rather smoothly curved in apical part ( Fig. 36 C, G ).

Gynatrium ( Fig. 39 D ). Notch on ventral margin of interramal sclerites moderately deep, triangular. Dorsal margin of interramal sclerite smoothly concave, without medial prominence. Separate sclerite near dorsal margin of interramal sclerites absent.

Distribution. Yemen.

Figures

FIGURE 35. Parameres of Dichelocentrum gen. nov. species. Right (A, B, E, F, I, J, M, N) and left (C, D, G, H, K, L, O) parameres. A–D, D. ornatifrons comb. nov., paratype; E–H, D. ornatifrons from Tanzania; I–L, D. transvaalicum sp. nov.; M–O, D. alkadanum comb. nov. after Linnavuori & van Harten (2005). Right (A, E, I, M), left (C, G, K, O) and posterior (D, B, F, H, J, L, N) view. Scale bare: 0.14 mm.

FIGURE 36. Vesica of Dichelocentrum gen. nov. A–C, uninflated vesica; D–H, anterior spicule; I–K, inflated vesica. A, D. flora comb. nov., holotype; B, D. ornatifrons comb. nov., paratype; C, D. alkadanum comb. nov., paratype after Linnavuori & van Harten (2005); D, D. longirostre comb. nov., syntype; E, D. flora, holotype; F, D. flora from Niger; G, D. ornatifrons, paratype; H, D. alkadanum, paratype after Linnavuori & van Harten (2005); I, J, D. longirostre; K, D. flora. Left (A–C, I), posterior (D–H), and superior (J, K) view. all—anterior left lobe; arl—anterior right lobe; as—anterior spicule; pa—posterior apex of vesica; pb.bab—posterior branch of basoapical sclerotised band; pll—posterior left lobe; prl—posterior right lobe; sg—secondary gonopore. Scale bare: 0.14 mm.

FIGURE 39. Inner female genitalia of Dichelocentrum gen. nov. A, gynatrium in dorsal view; B, D, posterior wall of gynatrium in ventral view; C, vestibular sclerites in dorsal view. A–C, D. transvaalicum sp. nov.; D, D. alkadanum, paratype. avs—anterior vestibular sclerites; ihf—posterior margin of inner horizontal fold; mpr—medial process; pvs— posterior vestibular sclerites; ts—tectal sclerites. Scale bare: 0.14 mm.

FIGURE 42. Dichelocentrum gen. nov., habitus. A, D. longirostre comb. nov., syntype, male; B, D. longirostre comb. nov., female; C, D. flora comb. nov., holotype, male; D, D. ornatifrons comb. nov., paratype, male; E, D. ornatifrons, paratype, female; F, holotype of Polymerus xerophilus, female; G, D. transvaalicum sp. nov., male; H, D. transvaalicum, female; I, D. alkadanum comb. nov., holotype, female.