Anillomyrma decamera

Eguchi, K., Bui, T. V. & Alpert, G. D., 2009, Revision of the ant genus Anillomyrma Emery, 1913 (Hymenoptera: Formicidae: Myrmicinae: Solenopsidini)., Myrmecological News 13, pp. 31-36 : 33

Anillomyrma decamera (Emery, 1901) (Figs. 1 - 10)

Monomorium decamerum Emery , 1901: 117. Syntype workers, Sri Lanka: Anuradhapura , W. Horn leg., 1899, MSNG. Two syntypes examined .

Monomorium (Anillomyrma) decamerum Emery , 1901: Emery (1913): 261 (combination).

Anillomyrma decamera (Emery, 1901): Ettershank (1966) (combination).

Anillomyrma decamera ssp. continentis Wheeler , 1927: 96-97. Syntype workers, Van Phu , Indochina [ Vietnam?], leg. F. Silvestri, 16.II.1925 ( MCZC). Three syntypes ( 35572 ) examined. New synonymy .

Non-type material examined. China: " Jungshan ", 9 workers, leg. F. Silvestri ( MCZC) . Vietnam: Ba Ria - Vung Tau: Binh Chau - Phuoc Buu Nature Reserve , 10° 32' 49" N, 107° 29' 11" E, 44 m a.s.l., 33 workers captured in underground bait-trap # BTN 16xii 08-18 , leg. K. Eguchi, 16.XII. 2008 ( ACEG, MCZC, MHNG, MSNG, NHMW, VNMN) . Philippines: Luzon Island: Camarines Sur: Mt. Isarog , Naga City , Panicuason Village , 13° 40' 11" N, 123° 20' 05" E, 550 m a.s.l., 6 workers extracted from soil, leg. J. Caceres, 31.III.2008 ( DMGC) .

Worker diagnosis. (Also see "Worker description" under the genus description). Body sculpture absent except for hair-pits, which are most conspicuous on head and promesonotum; dorsum of head, promesonotum and gaster relatively densely covered with short suberect to decumbent hairs. Head in full-face view roughly rectangular, longer than broad; mandible with 4 distinct teeth of which basal one is smaller than the others and 3rd almost as large as 2nd (preapical tooth); antennal scape short, reaching only 7 / 10

- 3 / 4 of distance from anterior margin of clypeus to posterior margin of head; apical antennal segment more than 3 times as long as preapical segment. Dorsum of mesosoma in lateral view flat; posterior slope of propodeum in lateral view hardly expanding posterodorsad. Petiolar peduncle in lateral view gradually thickened toward node.

Worker measurements and indices. Type material (3 syntype workers of " Anillomyrma decamera ssp. continentis ", but 2 measured for PW and WL): CI 79 - 82, HL 0.34

- 0.35 mm, HW 0.27 - 0.29 mm, PW 0.19 mm, SI 66 - 67, SL 0.18 - 0.19 mm, WL 0.46 - 0.48 mm; Vietnamese material(5 workers from BTN 16xii 08-18): CI 80 - 83, HL 0.37

- 0.38 mm, HW 0.30 - 0.32 mm, PW 0.21 - 0.23 mm, SI 67

- 72, SL 0.21 - 0.22 mm, WL 0.46 - 0.48 mm; Philippine material (3 workers from Isarog): CI 83 - 87, HL 0.33 - 0.37 mm, HW 0.28 - 0.32 mm, PW 0.19 - 0.22 mm, SI 61

- 65, SL 0.18 - 0.19 mm, WL 0.43 - 0.47 mm; Chinese material(3 workers from Jungshan, but 2 measured for WL): CI 85 - 86, HL 0.34 - 0.35 mm, HW 0.29 - 0.30 mm, PW 0.20 - 0.22 mm, SI 66 - 67, SL 0.20 mm, WL 0.47 mm.

Distribution. India: Bihar (Bolton 1987). Sri Lanka: Anuradhapura. Vietnam: Ba Ria - Vung Tau; "Van Phu". China: "Jungshan". Philippines: Luzon.

Remarks. CI is greater in the material from Isarog and Jungshan than in the material from Vietnam; SI is smaller in the material from Isarog than in the material from Vietnam and Jungshan.