Megachile (Callomegachile) atratiformis Meade-Waldo, 1914

Chatthanabun, Nontawat, Ascher, John S., Pinkaew, Nantasak, Thanoosing, Chawatat, Traiyasut, Prapun & Warrit, Natapot, 2020, Resin bees of genus Megachile, subgenera Callomegachile and Carinula (Hymenoptera, Megachilidae) from Thailand with description of a new species, ZooKeys 997, pp. 95-144 : 95

Megachile (Callomegachile) atratiformis Meade-Waldo, 1914 Figs 1 , 2

Megachile atratiformis Meade-Waldo, 1914: 456; Female syntype (NHMUK, examined) Mergui (Low Tenasserim), Myanmar.

Chalicodoma (Alocanthedon) atratiforme Engel & Gonzalez, 2011: 68-70.

Diagnosis.

Female can be easily recognized by its large body size (18-22 mm); black body covered with black hairs throughout (Fig. 2a ); clypeus without median tubercle; mandibles four teeth; apical margin of labrum truncate without tooth (Fig. 2d ); mesoscutum with weak transverse wrinkle pattern on disc, posteriorly also with weakly transverse wrinkle pattern (Fig. 2e ); yellow wings; black scopa. Male can be easily recognized by the presence of black setae patch on medial cell of forewings; apical of T6 with shallow concavity; front tibia modified ( Engel and Gonzalez 2011).

Literature records.

Malaysia. Negeri Sembilan, Pahang ( Meade-Waldo 1914; Gonzalez and Engel 2011; Ascher and Pickering 2020); Myanmar. Mergui Archipelago in Tanintharyi Region ( Meade-Waldo 1914; Gonzalez and Engel 2011; Ascher and Pickering 2020); Thailand. Uthai Thani ( Engel and Gonzalez 2011).

Material examined.

Female syntype. Myanmar: Tannintharyi Region. "Type H. T.; B.M. TYPE HYM. 2037. 17. a.; Megachile atrata (Var), Smith, female; Lower Tenasserim. Mergui, 11-89. C. T. Bingham.; Col. C. T. Bingham 96-30; Megachile (Eumegachile) atratiformis M.W., G. Meade-Waldo det., Type, female; NHMUK 013379843"; Thailand. Nong Khai Province: 1♀, Phon Phisai district, Cowboy Coffee, 18°6'9.95"N, 103°6'17.96"E, Alt. 147.65 m, 15-I-2017, coll. N. Warrit et al. (leg. NC and NW). Ubon Ratchathani Province: 1♀, Phu Jong Na Yoi Nat. P., Kaeng Ka Lao, 14°26'10.98"N, 105°16'37.05"E, Alt. 322 m, 5-I-2019, coll. N. Warrit et al (leg. NC and NW).

Floral records.

Engel and Gonzalez (2011) noted the species was captured on an indigenous tree, Dipterocarpus obtusifolius Teijsman & Miquel.

Comments.

Meade-Waldo’s original material was composite ( Engel and Gonzalez 2011) so we exclude from the distribution records from Middle Tenasserim: Haundraw [also known as Houngdarau] Valley in Myanmar (= M. odontophorum ) and also from Penang in Malaysia.

Figures

Figure 1. Thai distribution of Megachile (Callomegachile) atratiformis.

Figure 2. Megachile (Callomegachile) atratiformis Meade-Waldo, 1914, female a dorsal view b lateral view c frontal view d frontal view of mandible and labrum e dorsal view of mesoscutum f dorsal view of metasoma g lateral view of metasoma and scopa.