Wallacetrigona incisa (Sakagami and Inoue) Rasmussen & Thomas & Engel, 2017

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 : 11-13

Wallacetrigona incisa (Sakagami and Inoue) , new combination

Figures 1A , 2A , 3 , 4A, 4B , 5A , 11E

Trigona (Geniotrigona) incisa Sakagami and Inoue, 1989: 605 .

Geniotrigona incisa (Sakagami and Inoue) ; Rasmussen, 2008: 11 .

MATERIAL EXAMINED (n = 22⚲⚲): INDONESIA: Sulawesi: 8⚲⚲, Indonesia: Central Sulawesi, 8 km N Sedoa, Kec. [Kecamatan] Lore Utara [North Lore District], Kab. Poso [Kabupaten Poso, a.k.a. Poso Regency], 1500 m, XI-10-1995 [10 November 1995], G.W. Otis, ex: at honey bait [120.29°, -1.22°] ( SEMC) ; 12⚲⚲, Indonesia: Central Sulawesi, 8 km N Sedoa, Kec. [Kecamatan] Lore Utara [North Lore District], Kab. Poso [Kabupaten Poso, a.k.a. Poso Regency], 1500 m, XI-10-1995, G.W. Otis, ex: at honey bait [120.29°, -1.22°] ( CRCD) ; 2⚲⚲, Indonesia: C. Sulawesi, Kamarora, Survey Site 12, Waterfall , 24 ix 1996 [24 September 1996], 800m, G.W. Otis [55 km SE of Palu, 120.14°, -1.22°] ( CRCD) .

ADDITIONAL LOCALITIES: Although we have not examined specimens from the following localities in Sulawesi, the following were reported by Sakagami and Inoue (1989): N. Celebes [North Sulawesi], Minahasa [Peninsula], Modoinding [124.45°, 0.80°]; C. Celebes, Todyamboe [Tojambu, actually South Sulawesi], 900 m [120.10°, -2.93°]; Sulawesi, Sulteng, Kab. Poso [Kabupaten Poso, a.k.a. Poso Regency, Central Sulawesi], Wuasa [120.29°, -1.42°]; Central Sulawesi, Lore Lindu National Park [120.19°, -1.47°]; Gn. [Gunung] Tokosa [Central Sulawesi], 2100–2200 m [120.04°, -1.35°]; Lake Tambing [in Poso Regency, Central Sulawesi], Mal. Trap 5 [Malaise trap 5], swamp [120.31°, -1.33°]. According to J.S. Ascher (pers. comm.), an additional specimen is present in the Essig Museum of Entomology , University of California, Berkeley: [South] Sulawesi, Latimojong, along aqueduct, 1350 m, 9 Aug 2016, Pete Obovski [120.10°, -3.40°] .

Genus Geniotrigona Moure

Geniotrigona Moure, 1961: 212 . Type species: Trigona thoracica Smith, 1857 , by original designation.

DIAGNOSIS: The genus Geniotrigona is distinctive among Indomalayan Meliponini owing to the combination of its large size; elongate malar space (more than twice diameter of the third flagellomere) (figs. 1B, 1C, 2B, 2C, 6A, 6B); short mesoscutellum; short, declivitous propodeum; distinctively raised ridge posteriorly on the vertex (figs. 1B, 6A, 6B); and comparatively short, dense, plumose setae that largely obscure the integument on the mesosoma. It is most similar to the new genus described above, but can be distinguished by those features outlined there (above).

INCLUDED SPECIES: Presently, the genus includes two species: Geniotrigona thoracica (Smith) and G. lacteifasciata (Cameron) .

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 3. Morphological details of Wallacetrigona incisa (Sakagami and Inoue), worker caste. A. Head in profile. B. Head and anterior mesosoma in profile. C. Mandible outer surface, with preapical teeth (P1 and P2) labeled. D. Forewing with prominent veins and crossveins labeled.

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 11. Anatomical details of various genera of Indomalayan and Australasian genera of Meliponini. A. Profile of upper mesosoma of Heterotrigona (Heterotrigona) itama (Cockerell). B. Profile of upper mesosoma of Tetragonula (Tetragonilla) collina (Smith). C. Propodeum of Homotrigona (Lophotrigona) canifrons (Smith). D. Metasomal apex of Geniotrigona lacteifasciata (Cameron). E. Ocellar triangle and medial vertex of Wallacetrigona incisa (Sakagami and Inoue), with arrow indicating posterior, medial, U-shaped incision.