Bruchidius centromaculatus ( Allard, 1868 )

Delobel, Alex, Ru, Bruno Le, Genson, Gwenaëlle, Musyoka, Boaz K. & Kergoat, Gael J., 2015, Molecular phylogenetics, systematics and host-plant associations of the Bruchidius albosparsus (Fåhraeus) species group (Coleoptera, Chrysomelidae, Bruchinae) with the description of four new species, Zootaxa 3931 (4), pp. 451-482 : 459

Bruchidius centromaculatus ( Allard, 1868)

Bruchus centromaculatus Allard, 1868:20

Bruchidius centromaculatus Anton & Delobel, 2003:161

Bruchus lanceolatus Motschulsky, 1874:211 (synonymy in Anton & Delobel, 2003:161) Bruchidius sahlbergi Schilsky, 1905 :no. 94 (synonymy in Anton & Delobel, 2003:161) Bruchus albonotatus Pic, 1930:13 (synonymy in Anton & Delobel, 2003:161)

Material examined. Egypt: 3♂, Bahareya, 18.xii.2002, ex Vachellia nilotica [1♂ 0 0 403, specimen Cf41 used for DNA extraction] (G. Fédière) [ CBAD, CBGP]; 2♂, Bahareya, 3.xii.2002, ex V. farnesiana [2♂ 0 0 703, 00803] (G. Fédière) [ CBAD]; 1♂, Giza, 12.xii.2002, ex Dichrostachys cinerea (G. Fédière) [ CBAD]; Phylae, 23.iii.– 4.iv.1993, ex acacia seeds (G. Couturier) [ CBAD]. Kenya: 5♂, 4♀, Mogotio, 1°05’29’’S, 35°56’06’’E, 1686m, 18.vi.2007, ex V. gerrardii [1♂ 0 9507, specimen GK54 used for DNA extraction] (B. Le Ru) [ CBAD, CBGP]; 2♂, 3♀, Suam, 00°29’27’’N, 35°50’31’’E, 1894m, i.2003, ex V. sieberiana [1♂ 03303] (B. Le Ru) [ CBAD]. Senegal : 1♂, Lamsar, 18.iii.1999, ex V. t. raddiana [1♂ 02600] (M.T. Gueye) [ CBAD, CBGP]; Ross-Béthiot, 21.iii.1999, ex V. nilotica [specimen Cf41 used for DNA extraction] (M.T. Gueye) [ CBAD, CBGP]; 5♂, 1♀, Ngazobil, 2.xii.1995, ex V. sieberiana [3♂ 12495, 13595, 0 2296, 0 0 497, 1♀ 13599] (A. & H. Delobel) [ CBAD]; 1♂, Ngazobil, 25.i.1997, ex V. sieberiana [1♂ 00297] (A. & H. Delobel) [ CBAD]; 1♂, Nianing, 3.vii.1999, V. sieberiana (A. & H. Delobel) [ CBGP]; 2♂, Diagle, 13.i.1996, ex Senegalia macrostachya [2♂ 0 1796, 00297] (A. & H. Delobel) [ CBAD, CBGP]; 1♂, Pout, i.1996, ex S. polyacantha campylacantha [1♂ 02796] (A. & H. Delobel) [ CBAD]; other material as listed in Anton & Delobel (2003), including specimens from Burkina-Faso, Democratic Republic of Congo, Israel, Mauritania, Saudi Arabia and Sudan.

A medium to large-sized (2.1–3.1 mm) species, from light yellowish to checkered with blackish and whitish spots; elytral intervals 1 and 2 blackened beyond half length, antennae and legs yellowish, apical antennal segments often darker; ventrite 1 with baso-central pear-shaped area with dense, semi-erect thinner setae in male; in female, last visible tergite with pair of oblong, micropunctate foveae that are devoid of shiny margin; Genitalia [see Figs. 1–7 , p. 163 in Anton & Delobel 2003]. Internal sac slender (w/l = 0.12), entirely lined with small broad-based spines or slim based spines, and 19 to 44 large denticles with base twice as long as point; lateral lobes separated to about 80% their length; tegminal strut with very small carina; in female, vagina long and membranous, with dorsal dentate sclerite.

Biology. Reared from seeds of Dichrostachys cinerea (L.) Wight & Arn., Senegalia dudgeoni (Craib ex Holland) Kyal. & Boatwr., S. polyacantha campylacantha (Hochst. ex A. Rich.) Kyal. & Boatwr. , S. macrostachya (Reichenb. ex DC.) Kyal. & Boatwr., Vachellia farnesiana (L.) Wight & Arn., V. gerrardii , V. nilotica adstringens (Schumach. & Thonn.) Kyal. & Boatwr., V. n. nilotica , V. n. tomentosa (Benth.) Kyal. & Boatwr., V. sieberiana (DC.) Kyal. Boatwr., V. tortilis and V. t. raddiana .

Discussion. Bruchidius centromaculatus is morphologically related to B. arabicus and can be distinguished by having broader apical antennal segments, no or only shallow protuberances at base of elytra, apically broader male last visible tergite, paired foveae at apex of female last visible tergite, distinctly lower number of denticles in internal sac, dentate sclerites in bursa copulatrix [see Figs. 1 a–c in Decelle 1979 for habitus and male genitalia of B. arabicus ].

Distribution. Burkina Faso, Democratic Republic of Congo, Egypt, Kenya, Mauritania, Saudi Arabia, Senegal , and Sudan.

Figures

FIGURES 1 – 4. Bruchidius albosparsus (male): 1 — median lobe (ventral view); 2 — lateral lobes (ventral view); Bruchidius aurivillii (male): 3 — median lobe with internal sac evaginated (lateral view); 4 — sclerites of the internal sac (ventral view).

FIGURES 5 – 8. Bruchidius elnairensis (male): 5 — median lobe (ventral view); 6 — lateral lobes (ventral view); Bruchidius eminingensis (male): 7 — median lobe (ventral view); 8 — lateral lobes (ventral view).