Haetosmia pakistaniensis Müller & Griswold, 2017

Müller, Andreas & Griswold, Terry, 2017, Osmiine bees of the genus Haetosmia (Megachilidae, Osmiini): biology, taxonomy and key to species, Zootaxa 4358 (2), pp. 351-364 : 359-361

Haetosmia pakistaniensis Müller & Griswold spec. nov.

Holotype. PAKISTAN: Baluchistan province, Pishin , 23– 27.5.1984, ♀ (leg. R.J. McGinley). Deposited in the Smithsonian Institution.

Paratypes. PAKISTAN: Baluchistan: Killi Sarda, 12 km S Quetta, 22.5.1984, 1♂ (leg. J. Rozen, Lodhi, Stupakoff); Pishin, 40 km N Quetta, 25.5.1984, 1♀ (leg. J. Rozen, Lodhi, Stupakoff). Deposited in the American Museum of Natural History .

Diagnosis. Due to the long ocelloccipital distance, which is about 2.5x as long as the ocellar diameter ( Fig. 16 ), the female of H. pakistaniensis can be confounded only with H. vechti . Compared to H. vechti , the second segment of the labial palpus of H. pakistaniensis is only about 1.8x as long as the first segment (2.3x as long in H. vechti ), the capitate pollen-harvesting bristles cover the entire length of the second segment of the labial palpus ( Fig. 17 ; only the apical two thirds or less in H. vechti ), these bristles are as long as or longer than the maxillary palpus ( Fig. 17 ; shorter than the maxillary palpus in H. vechti ) and the white appressed pilosity on vertex and terga is more strongly developed in H. pakistaniensis ( Fig. 15 ). The male of H. pakistaniensis is also very similar to H.

vechti including sternal characters and genitalia ( Figs 19, 20 ). However, the second segment of the labial palpus of H. pakistaniensis is only about 1.8x as long as the first segment (2.3x as long in H. vechti ), the proboscis is slightly shorter not reaching in repose beyond the coxa of the foreleg (reaching the base or middle of the trochanter in H. vechti ), the distance between the lateral ocellus and the preoccipital ridge is about 2x as long as the ocellar diameter (1.6–1.9x as long in H. vechti ) and the marginal zone of tergum 5 is completely black (yellowish-brown in H. vechti ).

Description. FEMALE: Body length 6–7 mm. Head: Head about 0.95x as long as wide. Distance between lateral ocellus and preoccipital ridge 2.5–2.6x as long as ocellar diameter ( Fig. 16 ). Distance between inner margins of lateral ocelli about 0.75x as long as distance between lateral ocellus and preoccipital ridge ( Fig. 16 ). Second segment of labial palpus about 1.8x as long as first segment and beset with numerous erect and apically capitate bristles, which cover the entire length of the segment and are very long with the longest bristles being as long as or longer than the maxillary palpus ( Fig. 17 ). Maximal width of genal area about 0.7x as long as maximal width of compound eye. Mandible three-toothed, apically reddish and subapically densely covered with appressed yellowish pilosity. Base of clypeus strongly bulged, in profile usually distinctly surpassing surface of supraclypeal area. Apical half of clypeus with thin yellowish pilosity distinctly contrasting with the thick white pilosity of clypeal base, supraclypeal area, paraocular area and frons. Apical margin of clypeus reddish. Gena with dense white pubescence obscuring integument ( Fig. 15 ). Posterior margin of vertex with appressed thick and plumose white hairs. Antenna more or less yellowish-red except for scape, pedicel and apical half of the last segment, which are blackish. Mesosoma: Punctation of scutum and scutellum dense with interspaces rarely reaching the diameter of one puncture except for the lateral parts of the scutum, where the punctation is slightly more scattered. Tegula yellowish, in its posterior half unpunctured. Anterior, lateral and posterior margin of scutum and scutellum, pronotum, mesepisternum, metanotum and propodeum except for its basal area covered with dense white pilosity ( Fig. 15 ). Basitarsus of foreleg distinctly broadened. Posterior margin of tibia and basitarsus of foreleg with very long white hairs. Exterior surface of femur and tibia of all legs as well as of coxa and basitarsus of hind leg partly or entirely covered with appressed white pilosity ( Fig. 15 ). Veins of forewing basally yellow and apically yellowish-brown ( Fig. 15 ); subcosta and lower margin of stigma brownish. Metasoma: Punctation of terga dense with interspaces rarely exceeding the diameter of one puncture. Marginal zones of terga 1–5 broadly yellowish-red. Terga 1–3 with white basal and apical hair bands, unhaired median zone of terga 1 and 3 very narrow ( Fig. 15 ). Terga 4–6 densely covered with appressed white pilosity ( Fig. 15 ). Scopa white.

MALE: Body length 7 mm. Head: Head 0.85x as long as wide. Distance between lateral ocellus and preoccipital ridge about 2x as long as ocellar diameter. Distance between inner margins of lateral ocelli about 0.8x as long as distance between lateral ocellus and preoccipital ridge. Second segment of labial palpus about 1.8x as long as first segment. Proboscis in repose not surpassing coxa of foreleg. Maximal width of genal area about 0.55x as long as maximal width of compound eye. Mandible two-toothed. Frons, paraocular area, supraclypeal area, clypeus and gena covered with dense white pilosity obscuring integument. Vertex without appressed white pilosity. Antenna yellowish-brown on its anterior side and slightly darker on its posterior side ( Fig. 18 ). Antennal segments 4–12 about 1.3x as long as wide ( Fig. 18 ). Mesosoma: Punctation of scutum and scutellum, pilosity of mesosoma and legs as well as colour of tegula and veins of forewing similar to female. Metasoma: Punctation of terga similar to female. Terga 1 and 2 with white basal and apical hair bands. Terga 3 and 4 with white apical hair bands and at most single thick plumose white hairs on disc. Terga 5 and 6 densely covered with appressed white pilosity. Marginal zones of terga 1–4, 6 and 7 yellowish-brown, of tergum 5 black. Tergum 6 with lateral tooth. Tergum 7 broadly truncate with preapical median swelling. Sternum 2 basally concave and in its apical third slightly raised; its apical margin medially shallowly emarginate. Sternum 3 covered with short, dense and fine yellowish pilosity; its apical margin with wide and shallow emargination, which is medially densely beset with yellowish-white hairs. Apical margin of sterna 4 and 5 medially distinctly albeit shallowly emarginate and beset with very short yellowish bristles (as in Fig. 20 ). Medioapical zone of sternum 5 densely punctured (as in Fig. 20 ). Sternum 6 deeply concave and with two indistinct tufts of yellowish-white hairs, which deviate from its apical margin and are widely separated from each other (as in Fig. 20 ). Underside of gonoforceps with numerous inwardly directed and rather weak bristles, which are light yellowish-brown and apically weakly bent (as in Fig. 20 ). Longest hairs on underside of apical fifth of gonoforceps distinctly longer than width of gonoforceps (as in Fig. 20 ).

Distribution. Known so far only from the surroundings of Quetta in Pakistan ( Fig. 9 ).

Pollen hosts. The only pollen load available so far exclusively consisted of pollen of Heliotropium .

Nesting biology. Unknown.

Etymology. The species epithet “ pakistaniensis ” means “from Pakistan ”.

Figures

FIGURE 9. Distribution of the six Haetosmia species. Green squares = H. circumventa; blue circles = H.ethiopiensis; orange circles = H.vechti; red triangles = H. altera; blue diamonds = H. brachyura; light blue square = H. pakistaniensis. Made with Natural Earth (www.naturalearthdata.com).

FIGURES 15–20. 15–18:Haetosmia pakistaniensis. 15: Female in lateral view.16: Vertex of female. 17: Proboscis of female. 18: Antenna of male. 19–20:Haetosmia vechti. 19: Genitalia of male in ventral view. 20:Sterna 4–6 of male.