Odontomachus scifictus , Sorger, D. M. & Zettel, H., 2011

Sorger, D. M. & Zettel, H., 2011, On the ants (Hymenoptera: Formicidae) of the Philippine Islands: V. The genus Odontomachus Latreille, 1804., Myrmecological News 14, pp. 141-163: 154

publication ID

23311

persistent identifier

http://treatment.plazi.org/id/8C8BB541-60A1-04B0-89D8-1C1ADBD228C0

treatment provided by

Donat

scientific name

Odontomachus scifictus
status

sp.n.

Odontomachus scifictus  HNS  sp.n.

(Figs. 7, 13, 19, 46)

Etymology: This name serves as an homage to early sci- ence fiction movies incorporating ants – the first author came across a poster of the movie "Empire of the Ants" (1977) directed by Bert I. Gordon that clearly depicts a giant, dangerously looking Odontomachus  HNS  species and de- cided that such prominent display should be memorialized.

Type locality: Camiguin Island, municipality of Mam- bajao, W of Mambajao, near spring of Katibawasan, ca. 350 - 400 m a.s.l.

Type material: Holotype worker (USC): Camiguin: W Mambajao, Katibawasan spring area, 350 - 400 m, 13. and 15.III.2010, leg. H. Zettel & C. V. Pangantihon ( 515).  Paratypes (70 workers; CSW, CZW, NHMW, UPLB, USC): same locality data as holotype, 65 ∑∑. W Mambajao, Benon, Saran – Kampanan, 500 - 800 m, 16. and 18.III. 2010, leg. H. Zettel & C. V. Pangantihon (516), 1 ∑. Mam- bajao, Yumbing, 28.X.2008, leg. C. V. Pangantihon (P306), 1 ∑. Catarman, Mainit, Tuasan Falls, 23.X.2008, leg. C. V. Pangantihon (P302), 3 ∑∑.

Description of worker: Measurements: holotype wor- ker: CI 70, HL 3.32, HW 2.33, MdI 60, MdL 2.00, MsL 4.47, PnW 1.38, PtH 1.36, PtL 1.48, PtW 0.50, SI 141, SL 3.28, TL 14.50; paratype worker with smallest HW: CI 67, HL 2.93, HW 1.97, MdI 54, MdL 1.58, MsL 3.80, PnW 1.18, PtH 1.15, PtL 1.28, PtW 0.42, SI 151, SL 2.97, TL 12.63; paratype worker with largest HW: CI 71, HL 3.42, HW 2.42, MdI 59, MdL 2.00, MsL 4.80, SI 139, SL 3.37, PnW 1.43, PtH 1.38, PtL 1.60, PtW 0.52, TL 15.25.

Structures: Striation on head extending from frontal lobes to ocular ridge, rest of head smooth and shiny. Prono- tum with fine, roughly round striation, closed circles or loops clearly visible in dorsal view; posterolateral parts without striation, smooth and shiny. Mesopleuron smooth and shiny, some fine transverse striation may occur to vary- ing extent but always at least the central region smooth and shiny. S-shaped, long and acute petiolar spine, slightly bent backwards. Entire ant appearing very shiny / glossy.

Pilosity: Pubescence sparse, short.

Colour: Uniformly reddish brown.

Habitats: Collected in shaded, humid places mostly in degraded, dipterocarp forests. The type locality was near a stream.

Distribution (Fig. 46): Endemic to the Philippines and only known from the island of Camiguin.

Notes: Odontomachus scifictus  HNS  sp.n. is very similar to O. philippinus  HNS  , but differs in the extension of the smooth area on the mesopleuron reaching the meso-metapleural suture, and by the distinct tubercles of the petiole (petiole in anterodorsal aspect widest at tubercles). The distribution of O. scifictus  HNS  sp.n. and O. philippinus  HNS  are separated by an-

other vicariant form, Odontomachus alius  HNS  sp.n. See also notes for Odontomachus  HNS  sp. 2 from Mindanao.

Odontomachus  HNS  sp. 2 (Figs. 24 - 26, 46)

Material examined (1 worker, FMNH): Mindanao: D a v a o : east slope of Mt. McKinley [a peak in the Mt. Apo massif], 1.IX.1946, 5200 ft. (= ca. 1600 m a.s.l.), on ground, leg. F.G. Werner, 1 ∑.

Description of worker: Measurements: CI 76, HL 2.90, HW 2.22, MdI 52, MdL 1.50, MsL 3.57, SI 121, SL 2.68, PnW 1.33, PtH 1.35, PtL 1.38, PtW 0.54, TL 12.38.

Structures: Striation on head strong until ocular ridge, fading out toward temporal ridge, except along median furrow smooth and shiny like posterior part of head. Stria- tion on pronotum conspicuous: longitudinal posteromedial- ly, horseshoe-shaped around; fine in centre, coarser towards outer margins. Mesopleuron with some longitudinal stria- tion, smooth and shiny at centre. Petiole elongate S-shaped (posterior face concave) with long petiolar spine that is slightly bent backwards. Anterior slope of tergite 1 almost evenly convex, with sharp impression.

Pilosity: Pubescence on head and mesosoma loose, dis- tance between hairs approximately their length. No setae on tergite 1, tergite 2 with 3 setae, setae increasing in length and number towards apex of abdomen.

Colour: Body uniformly light brown, however, possibly bleached out due to long storage in alcohol.

Distribution (Fig. 46): Mindanao: Davao.

Notes: The single worker from Davao resembles O. philippinus  HNS  and O. scifictus  HNS  sp.n., but striation on head and mesopleuron is more extensive, striation on pronotum pe- culiar. Compared to all Philippine O. infandus  HNS  group spe- cies, the anterior of tergite 1 is more convex. The specimen strongly resembles some workers from the nearby island of Sulawesi, Indonesia (from Mayr's collection at NHMW, without details on locality) which belong to an undescribed species.