Crematogaster bandarensis, Forel, 1913

Hosoishi, Shingo & Ogata, Kazuo, 2016, Systematics and biogeography of the ant genus Crematogaster Lund subgenus Orthocrema Santschi in Asia (Hymenoptera: Formicidae), Zoological Journal of the Linnean Society 176 (3), pp. 547-606 : 575-576

CREMATOGASTER BANDARENSIS FOREL, 1913 STAT. NOV.

( FIG. 97 )

Crematogaster biroi var. bandarensis Forel, 1913: 76 ;

syntype workers, Bandar Baroe , Sumatra, Indonesia (v. Buttel-Reepen) (MHNG, examined) . One syntype worker (middle specimen of three on one pin) in MHNG here designated Lectotype.

Crematogaster biroi var. andelis Santschi 1928: 129 .

One syntype worker, Ile Varela , Pulu Berhala, Sumatra, Indonesia, 2.ix.1919 (Corporaal) ( NHMB, examined). Syn. nov.

Crematogaster biroi var. bandarensis ; Emery, 1922: 132 [Combination in C. ( Orthocrema )].

Crematogaster biroi var. andelis ; Stärcke, 1930: 373 [Description of male].

Worker measurements (n = 10): HW 0.40–0.47; HL 0.42– 0.50; CI 92–98; SL 0.34–0.39; SI 81–86; EL 0.09– 0.11; PW 0.26–0.29; WL 0.48–0.54; PSL 0.05–0.08; PtL

0.14–0.17; PtW 0.12–0.15; PtH 0.10–0.12; PpL 0.09– 0.11; PpW 0.13–0.16; PtHI 67–82; PtWI 80–88; PpWI 127–150; WI 100–117.

General description of worker: Workers monomorphic.

Head subquadratic in full-face view. Mandibles with four teeth arranged at an equal distance, apical and subapical teeth large, basal two teeth smaller. Anterior clypeal margin convex in medial portion. Compound eyes slightly projecting beyond lateral margins of head in full-face view. Scapes reaching posterolateral corners of head.

Pronotal collar with weakly concave anterior margin in dorsal view, distinctly lower than pronotum in lateral view. Pronotal dorsum without distinct ridges laterally. Mesonotal dorsum with lateral ridges that irregularly extend posteriad to tips of propodeal spines. Pronotum and mesonotum in lateral view not clearly forming continuous dorsal outline; mesonotal dorsum flat. Metanotal groove in dorsal view transverse, almost straight in median portion, forming deep concavity that is laterally margined by lamellate ridges. Propodeal spiracles elliptical, situated at posterolateral corners of propodeum, touching to metapleural gland bullae. Propodeal spines developed, as long as diameter of propodeal spiracles, in dorsal view directed posteriad.

Petiole in dorsal view with subparallel sides, longer than wide. Posterior portion of petiole with short process that is slightly higher than posterior margin of petiole disc in lateral view. Subpetiolar process weakly developed as angulate tubercle. Postpetiole in lateral view with weakly convex dorsum, as high as petiole, in dorsal view as wide as petiole, weakly bilobed posteriorly but without longitudinal sulcus. Subpostpetiolar process undeveloped, but venter of postpetiole convex.

Integument essentially smooth and shining. Dorsal surface of head smooth and shining. Mandibles with feeble rugulae and smooth interspaces. Clypeus generally smooth and shining, but with one pair of longitudinal rugulae; rugulae not extending to posterior clypeal margin. Dorsal and lateral surfaces of pronotum smooth and shining; anterolateral shoulders of pronotum with rugulae. Mesopleura smooth and shining. Dorsal surface of propodeum smooth and shining, but one pair of rugulae running from metanotal groove to tips of propodeal spines. Dorsal surface pf petiole smooth. Lateral surface of petiole generally smooth, but with one longitudinal rugula. Dorsal and lateral surfaces of postpetiole smooth and shining.

Standing pilosity sparse. Dorsal face of head with suberect setae sparsely. Clypeus with two pairs of long setae in anterior portion, one directed upward and the other downward. Anterior clypeal margin with one pair of long setae medially and short setae laterally. Scapes with suberect setae. Mesosoma with five pairs of long erect and stout setae (ps1PN, ps2PN, psaMN, pspMN, and ps1PS) that are much longer than other erect setae. Posterolateral tubercles of petiole posteriorly with two pairs of long setae. Postpetiole with three pairs of long setae on disc anteriorly, posteriorly and laterally. Fourth abdominal tergite with erect to suberect setae abundantly, and short decumbent setae sparsely.

Body yellow. All flagellar segments yellow.

Comments: In the worker this species can be distinguished from all other members of the C. quadriruga group by the distinct compound eyes, V-shaped metanotal groove in lateral view, large propodeal spiracles touching metapleural gland bulla, and short propodeal spines. This species is similar to C. philippinensis and C. sundalandensis , but can be distinguished from them by the short and stout propodeal spines (PSL 0.05–0.08 vs. 0.08–0.11 and 0.08–0.11 in the latters). This species corresponds to sp. 52 of SKY ( Ito et al., 2001; Eguchi & Yamane, 2003).

Distribution and biology: This species is known from S. Thailand, Malaysia (Peninsula and Borneo), Brunei, Indonesia (Bali, Sumatra, Krakatau) ( Fig. 52 ). It inhabits developed forests, and nests in soil or in leaf litter.

Material examined: BRUNEI: one worker, Tasek Merimbun, 16.ii.1999, (Eg99-BOR-126) (K. Eguchi) ; INDONESIA: one worker, Sembung, 25 km N of Denpasar, Bali, 19.iii.1987, (Imai et al) ; three workers, Tuapejat, Pulau Sipora, Mentawai Is., W. Sumatra, 24.ii.2007 ( SU 07-SKY-97) (Sk. Yamane) ; one worker, Bodong Jaya, Sumberjaya, Lampung Barat (secondary forest), S. Sumatra, 16.ix.2007 (leaf litter / s. soil) (Sk. Yamane) ; six workers, Bodong Java, Sumberjaya, Lampung Barat, S. Sumatra, 16.ix.2007 (leaf litter) ( SU 07-SKY-156) (Sk. Yamane) ; four workers, Pulau Sebesi, Lampung Prov., Sunda Strait, 12.viii.2005 (RK05-SKY-24) (Sk. Yamane) ; MALAYSIA: four workers, 19 miles, Cameron Highlands, 11.iii.2010 (SH10-Mal-48) (S. Hosoishi) ; one worker, Ulu Gombak, Selangor, 27.xi.2005 ( MP 05-SKY- 08) (Sk. Yamane) ; four workers, UM plantations, Kota Tinggi, Johor, 17.xii.2013 (sugar, TD-85) (Sk. Yamane & Y. Miyaguni) ; four workers, UM plantations, Kota Tinggi, Johor, 17.xii.2013 (sugar, GD-64) (Sk. Yamane & Y. Miyaguni) ; one worker, Kubah N. P., Kuching, Sarawak, Borneo, 28.xii.1997, (F. Yamane) ; two workers, 8 ha plot, Tower Reg., Lambir, Miri, Sarawak #117, E Malaysia, 27.viii.1994, ( T. Itioka & T. Yumoto) ; one worker, Old Tower R., Lambir N. P., Miri, Sarawak, 22.i.1993, (Sk. Yamane) (Canopy Ecol.) ; seven workers, Lambir N. P., Miri, Sarawak, 14.v.2011 (SR11-SKY- 11) (nest in soil) (Sk. Yamane) ; two workers, Danum Valley, Sabah, Borneo, 29.viii.1995, (Sk. Yamane) (prim. for.) ; two workers, Tawau Hills N. P., Sabah, Borneo, E. Malaysia, 8.vii.1996, (K. Eguchi) ; three workers, Inoue Trail, Lambir N. P., Sarawak, E. Malaysia, 2.vii.2004 (SR04-SKY-78) (Sk. Yamane) ; seven workers, Maliau Basin (riparian forest), Sabah, Borneo (300 m alt.) 10.xi.2011 (ex carton cover on plant stem with scale insects) (SB11-SKY-38) (Sk. Yamane) ; THAILAND: eight workers, Khlong Saeng WS, Ratchaprapha D., Surat Thani Prov., 15.x.2011 (TH11-SKY-134) (rotting wood) (Sk. Yamane) ; two workers, Tai Rom Yen NP (400 m alt.), Surat Thani Prov., 11.x.2011 (decayed wood) (TH11- SKY-016) (Sk. Yamane) ; three workers, Ton Nga Chang, nr. Hat Yai, Songkhla Prov., 23.ix.2001 (Eg01-TH- 609) (K. Eguchi).

Figures

Figure 52. Geographical distribution of the species of the C. quadriruga group.

Figures 96–103. Body in lateral view. 96, Crematogaster baduvi, worker [Endau Rompin National Park, W. Malaysia]; 97, Crematogaster bandarensis, worker [Tai Rom Yen National Park, Surat Thani Prov., S. Thailand]; 98, Crematogaster binghamii, worker [Dry evergreen forest, Lumchangwat Stn., Khao Ang Reu Nai WS, Chacheongsap Prov., E. Thailand]; 99, Crematogaster biroi, worker [Punjavi Univ. Campus, Patiala, Punjab Prov., India]; 100, Crematogaster biroi, intermediate worker [Punjavi Univ. Campus, Patiala, Punjab Prov., India]; 101, Crematogaster brevispina, worker [Tabuc- Tubig, Oriental Dumaguete, Negros, Philippines]; 102, Crematogaster brunensis, worker [Bukit Sulang, nr. Lamunin, Brunei]; 103, Crematogaster celebensis, worker [Kadokaan, P. Batudaka, Togian Island, Sulawesi, Indonesia].