Geniotrigona thoracica (Smith)

Rasmussen, Claus, Thomas, Jennifer C. & Engel, Michael S., 2017, A New Genus of Eastern Hemisphere Stingless Bees (Hymenoptera: Apidae), with a Key to the Supraspecific Groups of Indomalayan and Australasian Meliponini, American Museum Novitates 2017 (3888), pp. 1-36 : 13

Geniotrigona thoracica (Smith)

Figures 1B , 2C , 4C, 4D , 5B , 6

Trigona thoracica Smith, 1857: 50 .

Melipona thoracica (Smith) ; Dalla Torre, 1896: 584.

Trigona ambusta Cockerell, 1918: 387 . Synonymy vide Schwarz (1939).

Trigona thoracica variety ambusta (Cockerell) ; Schwarz, 1937: 327.

Trigona (Tetragona) thoracica Smith ; Schwarz, 1939: 104.

Geniotrigona thoracica (Smith) ; Moure, 1961: 212.

Trigona (Geniotrigona) thoracica Smith ; Sakagami, 1975: 56.

Trigona (Heterotrigona) thoracica Smith ; Michener, 1990: 126.

MATERIAL EXAMINED (n = 98⚲⚲, 1033): MALAYSIA: Kedah: 1⚲, Malay Penin. [Malay Peninsula], Kedah, Alor Setar , Gunong Keriang , April 1, 1928 ( AMNH) ; Pahang: 1⚲, Frasers Hill , F.M.S. [Federated Malay States], 30.ix.29 [30 September 1929], N.C.E. Miller ( AMNH) ; 1⚲, Malay Penin. [Malay Peninsula], Pahang, F.M.S. [Federated Malay States], Jerantut, Datu Dalan [?], March 19, 1927 ( AMNH) ; Perak: 1⚲, Malaya, Maxwell Gardens, Taiping Hills , 3300 ft., 12.xi.1931 [12 November 1931], H.T. Pagden ( AMNH) ; Selangor: 2⚲⚲, Malaysia: Selangor, Kepong , 9-VIII-2004, H.R. Hepburn, ex: caught on flowers ( SEMC) ; 3⚲⚲, Malaysia: Selangor, Phoon Chun Guan , March 1980, R9, Azhar P.C. Guan ( SEMC) ; 7⚲⚲, Malaysia: Selangor, Kepong , Sept. 1976, S. Appanah ( SEMC) ; 2⚲⚲, Malaysia, W. Selangor , Serdaag, 1983, on Brazil nut ( SEMC) ; 1⚲, Malaya, Bukit Kutu [peak near Kuala Kubu], 30.i.1930 [30 January 1930], H.T. Pagden, 3485 ft. ( AMNH) ; Kuala Lumpur: 18⚲⚲, Malaysia: Kepong Forest Res. Inst. , 18 October 1975, Rudolf Jander ( SEMC) ; 1⚲, Malay Penin. [Malay Peninsula], ex: Coll. Agr. Dept. Kuala Lumpur , April 23, 1909 ( AMNH) ; Johor: 1⚲, Malaysia: Johor , 15.3 km W. Sedili Besar, 16 Oct 1986, John W. Wenzel ( SEMC) ; Malacca: 1⚲, Malacca, Kuala Kubu [it is unclear which locality Buttel-Reepen is referring to as “Kuala Kubu” is in Selangor, we have merely listed it as it appears on his label], 3.1912 [March 1912], Butt. - Reep. [Buttel-Reepen] ( AMNH) ; SINGAPORE: 14⚲⚲, Singapore, Bukit Timah , 12 Oct 1986, J.W. Wenzel ( SEMC) ; THAILAND: Sisaket: 1⚲, Thailand, Sisaket, Huai Thap Than Distr. , 25.iii.2004, S. Thummajitsakul ( SEMC) ; Prachuap Khiri Khan: 2⚲⚲, Thailand, Prachuap Khiri Khan, Thap Sakae Distr. , 12.ii.2006, S. Thummajitsakul ( SEMC) ; 7⚲⚲, Thailand: Prachuap Khiri Khan Prov., Huai Yang waterfall, 25 km SW Prachuap Khiri Khan, 27 January 1993, S. Boongird, C. Michener ( SEMC) ; 6⚲⚲, Thailand: Prachuabkirikan Prov., Huay Yang Waterfall , 30.iii.2004, S. Boongird ( SEMC) ; 1⚲, Thailand, Thap-Sakae , 2.9.76 [2 September 1976], Pauly rec, composit, radiee, blanche ( CRC) ; Ranong: 1⚲, S. Thailand, hills above hot springs, 29.4.08 [29 April 2008], Ranong, Ranong Prov. , Hans Bänziger leg. ( SEMC) ; 8⚲⚲, Thailand: Ranong Prov., Muang Distr. , 9–13 Nov 2002, Samnuk [sic: Somnuk] Boongird ( SEMC) ; 333, Thailand, Ngao, A. Muang, Ranong , 16.12.03 [16 December 2003], [S. Boongird] ( SEMC) ; Surat Thani: 2⚲⚲, Thailand, Surat Thani, Chaiya Distr. , 20.x.2003, S. Thummajitsakul ( SEMC) ; Phang Nga: 2⚲⚲, Thailand, Phang Nga Prov., Khao Sok National Park , between Takua Pa and Khao Mok, March 2000, D.R. Smith ( SEMC) ; Krabi: 5⚲⚲, Thailand: Krabi Prov., Owluk Distr. , 8–15 Nov 2002, Samnuk [sic: Somnuk] Boongird ( SEMC) ; 733, Thailand: Krabi Prov., Khoa Phanom Distr. , 13.v.2004, S. Boongird ( SEMC) ; Songkhla: 4⚲⚲, Ban Prakamp, Song Kalo Prov. [Songkhla Province], vii.18.28 [18 July 1928], Siam [Thailand] ( AMNH) ; INDONESIA: North Sumatra (Sumatera Utara): 4⚲⚲, O. Sumatra [Ost Sumatra], [illegible], 7.1932 [July 1932] ( AMNH) ; South Sumatra (Sumatera Selatan): 1⚲, S. Sumatra [South Sumatra], Kedaton, 150 m, 28 Maart 1937 [28 March 1937], J.v.d. Vecht ( AMNH) ; 1⚲, Z. Sumatra [Zuid Sumatra], Ranau [Lake Ranau], 24.viii.33 [24 August 1933], H.R.A. Miller ( AMNH) .

Figures

FIGURE 1. Lateral habitus of workers. A. Wallacetrigona incisa (Sakagami and Inoue). B. Geniotrigona thoracica (Smith). C. G. lacteifasciata (Cameron).

FIGURE 2. Facial views and mouthparts of workers. A. Facial view of Wallacetrigona incisa (Sakagami and Inoue). B. Facial view of G. lacteifasciata (Cameron). C. Facial view Geniotrigona thoracica (Smith). D. Lateral view of extended mouthparts of G. lacteifasciata, note erect, hooked setae of galea and wavy setae of basal labial palpomeres.

FIGURE 4. Metatibiae and metatarsi of workers. A. Outer surface of Wallacetrigona incisa (Sakagami and Inoue). B. Inner surface of W. incisa. C. Outer surface of Geniotrigona thoracica (Smith). D. Inner surface of G. thoracica.

FIGURE 5. Inner surfaces of worker metatibiae and metarsi, with prominent zones and areas colored and labeled (green = keirotrichiate zone; yellow = posterior glabrate zone; red = lower glabrate zone blending into anterior surface; pink = basal sericeous area). A. Wallacetrigona incisa (Sakagami and Inoue). B. Geniotrigona thoracica (Smith).

FIGURE 6. Morphological details of Geniotrigona thoracica (Smith), worker caste. A. Head in profile. B. Head and anterior mesosoma in profile. C. Oblique view of lower face, with mouthparts extended to show hooked galeal setae and wavy setae ventrally on basal labial palpomeres. D. Mandible outer surface, with preapical teeth (P1 and P2) labeled.