taxonID	type	description	language	source
0F1B87DF4557013DFC33FCF0302171D8.taxon	description	(Figs. 1 – 4, 17)	en	Zettel, Herbert, Laciny, Alice, Balàka, Pia, General, David Emmanuel M. (2018): On the taxonomy of Myrmicaria Saunders, 1842 (Hymenoptera: Formicidae) in the Philippines. Raffles Bulletin of Zoology 66: 610-623, DOI: 10.5281/zenodo.5360475
0F1B87DF4557013DFC33FCF0302171D8.taxon	materials_examined	Non-type material examined. 14 workers (nest series) (UPLB), Philippines, Mindanao Island, Davao City, Calinan Village, Malagos watershed area, coll. D. E. M. General, 04 July 2014; 16 workers (CZW), Philippines, Mindanao Island, Bukidnon Province, Malaybalay, Kaamulan, 650 m a. s. l., 5 – 20 March; 2 workers (FMNH), Philippines, Mindanao Island, Davao Province, east slope Mt. McKinley, 3,000 – 3,300 ft. a. s. l., coll. H. Hoogstraal, August – September 1946.	en	Zettel, Herbert, Laciny, Alice, Balàka, Pia, General, David Emmanuel M. (2018): On the taxonomy of Myrmicaria Saunders, 1842 (Hymenoptera: Formicidae) in the Philippines. Raffles Bulletin of Zoology 66: 610-623, DOI: 10.5281/zenodo.5360475
0F1B87DF4557013DFC33FCF0302171D8.taxon	diagnosis	Diagnosis (worker). In exact full-face view, eyes breaking outline of head. Scape relatively long, SI = 104 – 117. Anteroventral pronotal spines prominent. Sides of mesonotum weakly bulging; posterior surface with longitudinal rugae (except in small specimens). Medial carina of mesonotum not extended onto propodeum. Node of petiole moderately widened in dorsal aspect. Propodeal spines long, directed dorsocaudally, not continuing dorsal outline of propodeum. Peduncle of petiole long. Base of gaster tergite 1 with distinct striation. Specimens quite variable in size and sculptural details.	en	Zettel, Herbert, Laciny, Alice, Balàka, Pia, General, David Emmanuel M. (2018): On the taxonomy of Myrmicaria Saunders, 1842 (Hymenoptera: Formicidae) in the Philippines. Raffles Bulletin of Zoology 66: 610-623, DOI: 10.5281/zenodo.5360475
0F1B87DF4557013DFC33FCF0302171D8.taxon	description	Description (worker). Measurements: min – max (n = 32): HW 1.24 – 1.76; HL 1.22 – 1.67; SL 1.41 – 1.83; SW 0.13 – 0.18; TL 5.22 – 7.21; Pmin 0.11 – 0.22; PW 0.29 – 0.49; PPW 0.34 – 0.52; SpD 0.22 – 0.42; PrL 0.67 – 0.99; FeL 1.83 – 2.45; ML 1.57 – 2.22; PnW 0.72 – 1.21; CI 98 – 109; SI 104 – 117; FeI 136 – 154. Structures: Head (Fig. 3) roundish to slightly transverse; dorsally usually with distinct reticulate rugae, but in some specimens with more prominent longitudinal rugae; laterally always with fine longitudinal rugae. Clypeus with median carina not reaching foremargin; sides with very variable longitudinal rugae, almost absent in small specimens. Mandible with sharp longitudinal rugae; apical margin with four teeth. Mesosoma with median carina on pronotum and mesonotum, posteriorly often not reaching hind margin. Pronotal dorsum usually with coarse reticulated rugae, but in few specimens with more pronounced longitudinal rugae; anteroventral teeth prominent. Mesonotum in addition to the median carina with scarce sculpture and a sharply elevated transverse carina; sides strongly, angularly elevated. Metanotal groove narrow and deep; in dorsolateral view lateral margin forming an acute angle. Sides of mesosoma with longitudinal rugae, usually reduced on sides of propodeum. Dorsum of propodeum with reduced sculpture, often with fractions of a transverse carina or of longitudinal carinae; area between bases of spines strongly concave in dorsal aspect. Propodeal spines long, directed upward in relation to anterior outline of propodeum, slightly to moderately diverging in dorsal aspect. Nodes of petiole and postpetiole rounded; peduncle of petiole long. Gaster with piliferous punctures and with fine but distinct striation at base of gaster tergite 1. Setae abundant on trunk and appendages. Dorsal setiferation composed of two types of setae, short setae about half as long as long ones. On head dorsum, petiole and postpetiole all setae suberect. Short setae abundant on mesosoma sides, but sparse on its dorsum. On gaster, long setae suberect, short setae subdecumbent anteriorly, suberect posteriorly. Colour (Bukidnon specimens): Trunk light to medium brown; head dorsally infuscated in few specimens, gaster variably infuscated. Antennae and legs light brown. Setae whitish. Notes. Myrmicaria aphidicola was described from nine workers from the Mt. Apo area, Mindanao (North Cotabato Province, Kidapawan, Agco) (Calilung, 2000). The name derives from the observed association with aphids (Calilung, 2000). While Calilung (2000) compared M. aphidicola with M. brunnea Saunders, 1842 from India, the verbal description provides few useful characters to separate it from Philippine congeners. However, the drawings show a deep furrow behind the mesonotum, posterocaudally directed propodeal spines, and a long peduncle of the petiole. We were not able to study types in the course of this study. However, one specimen (obviously a type, although not labelled as such) was loaned by the late Stefan Schödl (NHMW) in 2003, and at that time the first author had the chance to observe the characteristic basal striation of the gaster for a better interpretation of M. aphidicola. Unfortunately, this specimen was misplaced during the time of his severe illness and his untimely death in 2005. Hitherto, M. aphidicola is the only described Philippine species with distinct basal striation on gaster tergite 1 (Fig. 4). However, there are about three similar undescribed species ranging from southern Luzon to Leyte with the same character. Further diagnostic characters are the rather prominent anteroventral pronotal spines, a deep metanotal groove, length and direction of propodeal spines, and a long peduncle of the petiole. RAFFLES BULLETIN OF ZOOLOGY 2018 All studied specimens from the Mt. Apo area are pale yellow, probably due to long storage in alcohol. Therefore, brown specimens from Bukidnon were used for the description of colour, which matches with the original description (compare Calilung, 2000). The Bukidnon specimens also differ from the other examined specimens by slightly larger size and longitudinal rather than reticulated rugae on the head.	en	Zettel, Herbert, Laciny, Alice, Balàka, Pia, General, David Emmanuel M. (2018): On the taxonomy of Myrmicaria Saunders, 1842 (Hymenoptera: Formicidae) in the Philippines. Raffles Bulletin of Zoology 66: 610-623, DOI: 10.5281/zenodo.5360475
0F1B87DF4557013DFC33FCF0302171D8.taxon	distribution	Distribution. Myrmicaria aphidicola is recorded from a few localities in the central part of Mindanao. Recorded altitudes range between 630 (Kaamulan) and 1,300 m a. s. l. (Lake Agco).	en	Zettel, Herbert, Laciny, Alice, Balàka, Pia, General, David Emmanuel M. (2018): On the taxonomy of Myrmicaria Saunders, 1842 (Hymenoptera: Formicidae) in the Philippines. Raffles Bulletin of Zoology 66: 610-623, DOI: 10.5281/zenodo.5360475
0F1B87DF4553013EFF67F9E1303E72EF.taxon	description	(Figs. 5 – 8, 18)	en	Zettel, Herbert, Laciny, Alice, Balàka, Pia, General, David Emmanuel M. (2018): On the taxonomy of Myrmicaria Saunders, 1842 (Hymenoptera: Formicidae) in the Philippines. Raffles Bulletin of Zoology 66: 610-623, DOI: 10.5281/zenodo.5360475
0F1B87DF4553013EFF67F9E1303E72EF.taxon	etymology	Etymology. Dedicated to Perry A. C. Buenavente of the National Museum of Natural History, Manila, who discovered this remarkable species.	en	Zettel, Herbert, Laciny, Alice, Balàka, Pia, General, David Emmanuel M. (2018): On the taxonomy of Myrmicaria Saunders, 1842 (Hymenoptera: Formicidae) in the Philippines. Raffles Bulletin of Zoology 66: 610-623, DOI: 10.5281/zenodo.5360475
0F1B87DF4553013EFF67F9E1303E72EF.taxon	materials_examined	Material examined. Holotype (worker) (NMNH) from Luzon Island, Nueva Vizcaya Province, Municipality of Quezon, Maddiangat Village, N 16 ° 27 ′ 16 ″, E 121 ° 13 ′ 14 ″, 1,076 m a. s. l., coll. P. A. C. Buenavente, 14 January 2010. Paratypes: 1 worker (NMNH) from the same locality; 2 workers (NMNH), same village, Mount Palali, N 16 ° 26 ′ 32 ″, E 121 ° 13 ′ 19 ″, 890 m a. s. l., coll. P. A. C. Buenavente, 16 January 2010; 22 workers (NMNH, ANIC, BMNH, CASC, CZW, LKCNHM, MCZ, NHMW, UPLB), same village, Mt. Palali, N 16 ° 26.80 ′, E 121 ° 13.27 ′, 1,296 m a. s. l., coll. P. A. C. Buenavente, 11 January 2010; 2 workers (UPLB), same village, N 16 ° 26.272 ′, E 121 ° 13.493 ′, 1,436 m a. s. l., coll. P. A. C. Buenavente, 9 January 2010.	en	Zettel, Herbert, Laciny, Alice, Balàka, Pia, General, David Emmanuel M. (2018): On the taxonomy of Myrmicaria Saunders, 1842 (Hymenoptera: Formicidae) in the Philippines. Raffles Bulletin of Zoology 66: 610-623, DOI: 10.5281/zenodo.5360475
0F1B87DF4553013EFF67F9E1303E72EF.taxon	diagnosis	Diagnosis (worker). Clypeus with pronounced median carina. Scape long, SI = 99 – 110. Pronotum dorsally with arcuate rugae, anteroventral teeth prominent. Sides of mesonotum hardly bulging; posterior surface with reduced sculpture. Rugae on metapleura and sides of propodeum longitudinal (reduced in smallest specimens). Propodeal spines long, directed caudally, continuing dorsal outline of propodeum, weakly upcurved. Propodeum deeply concave between bases of spines. Peduncle of petiole long. Base of gaster tergite 1 without striation. Gaster light brown.	en	Zettel, Herbert, Laciny, Alice, Balàka, Pia, General, David Emmanuel M. (2018): On the taxonomy of Myrmicaria Saunders, 1842 (Hymenoptera: Formicidae) in the Philippines. Raffles Bulletin of Zoology 66: 610-623, DOI: 10.5281/zenodo.5360475
0F1B87DF4553013EFF67F9E1303E72EF.taxon	description	Description (worker). Measurements of holotype: HW 1.54; HL 1.50; SL 1.53; SW 0.16; TL 7.11; Pmin 0.17; PW 0.40; PPW 0.45; SpD 0.53; PrL 1.14; FeL 2.02; ML 1.92; PnW 1.08; CI 103; SI 99; FeI 131. Measurements of paratypes: min – max (n = 15): HW 1.11 – 1.52; HL 1.13 – 1.52; SL 1.22 – 1.53; SW 0.13 – 0.16; TL 4.96 – 7.17; Pmin 0.12 – 0.16; PW 0.28 – 0.40; PPW 0.35 – 0.45; SpD 0.35 – 0.53; PrL 0.74 – 1.08; FeL 1.50 – 1.99; ML 1.37 – 1.96; PnW 0.75 – 1.08; CI 97 – 100; SI 101 – 110; FeI 131 – 136. Structures: Head (Fig. 7) roundish; medioposteriorly with strong piliferous punctures; most areas dorsally and laterally with fine longitudinal rugae. Clypeus with distinct median carina (usually complete) and few longitudinal rugae. Mandible with sharp longitudinal rugae; apical margin with four teeth. Pronotum with arcuate rugae on dorsal surface, usually without longitudinal elements; anteroventral teeth prominent (comparatively short in smallest specimens). Mesonotum with reduced sculpture, usually with a median and one transverse carina; sides laterally scarcely bulging. Metanotal groove narrow and sharp, in dorsolateral view lateral margin forming an obtuse angle. Mesopleura and sides of propodeum with more or less developed longitudinal rugae (evanescent in smallest specimens). Dorsum of propodeum with reduced sculpture, a transverse carina or a pair of longitudinal carinae occasionally present; in dorsal view, area between bases of spines strongly concave. Propodeal spines long, directed caudally, slightly diverging, at base continuing dorsal outline of propodeum, then weakly upcurved (except in one aberrant specimen with downcurved spines). Nodes of petiole and postpetiole rounded; peduncle of petiole long. Gaster with piliferous punctures; base of gaster tergite 1 without striation. Setae abundant on trunk and appendages. Dorsal setiferation composed of two types of setae, short setae about half as long as long ones. On head dorsum, petiole and postpetiole all setae suberect. Short setae abundant on mesosoma sides, but scarce on its dorsum. On gaster, long setae suberect, short setae subdecumbent anteriorly, suberect posteriorly. Colour: yellow; mandibles, distal part of antenna and gaster tergites light brown. All setae white. Comparative notes. Myrmicaria buenaventei new species can be immediately recognized by the arcuate rugae on the dorsum of the pronotum (Fig. 6). Pronounced anteroventral pronotum teeth (Fig. 6), a reduced sculpture of the mesonotum, comparatively long propodeal spines and petiolar peduncle (Fig. 5), and a smooth gaster base are further important characteristics of M. buenaventei new species. The overall very pale colour may be an artefact caused by preservation in ethanol.	en	Zettel, Herbert, Laciny, Alice, Balàka, Pia, General, David Emmanuel M. (2018): On the taxonomy of Myrmicaria Saunders, 1842 (Hymenoptera: Formicidae) in the Philippines. Raffles Bulletin of Zoology 66: 610-623, DOI: 10.5281/zenodo.5360475
0F1B87DF4553013EFF67F9E1303E72EF.taxon	distribution	Distribution and habitat. Despite the fact that numerous samples of Myrmicaria from Luzon were studied, M. buenaventei new species is only known from Mt. Palali in Nueva Vizcaya Province. There it occupies a wide altitudinal range (890 – 1,436 m a. s. l.) including cold and wet habitats in the mossy forest zone (Figs. 21 – 24) (Perry A. C. Buenavente, pers. comm.).	en	Zettel, Herbert, Laciny, Alice, Balàka, Pia, General, David Emmanuel M. (2018): On the taxonomy of Myrmicaria Saunders, 1842 (Hymenoptera: Formicidae) in the Philippines. Raffles Bulletin of Zoology 66: 610-623, DOI: 10.5281/zenodo.5360475
0F1B87DF45500130FF71F91633CA73E4.taxon	description	(Figs. 9 – 12, 19)	en	Zettel, Herbert, Laciny, Alice, Balàka, Pia, General, David Emmanuel M. (2018): On the taxonomy of Myrmicaria Saunders, 1842 (Hymenoptera: Formicidae) in the Philippines. Raffles Bulletin of Zoology 66: 610-623, DOI: 10.5281/zenodo.5360475
0F1B87DF45500130FF71F91633CA73E4.taxon	etymology	Etymology. Named after James Wittenmyer Chapman (1880 – 1964), myrmecologist at Silliman University, Dumaguete, Negros Oriental, and at Harvard University, to honour his passionate dedication to science and his sense of social responsibility.	en	Zettel, Herbert, Laciny, Alice, Balàka, Pia, General, David Emmanuel M. (2018): On the taxonomy of Myrmicaria Saunders, 1842 (Hymenoptera: Formicidae) in the Philippines. Raffles Bulletin of Zoology 66: 610-623, DOI: 10.5281/zenodo.5360475
0F1B87DF45500130FF71F91633CA73E4.taxon	materials_examined	Material examined. Holotype (worker) (NMNH) from Negros Island, Negros Oriental Province, Sibulan, Lake Balinsasayao – Lake Danao area, 28 – 30 October. Paratypes: 19 workers (NHMW, CZW) from the same sample; 1 worker (MCZ), Negros Island, Negros Oriental Province, Dumaguete, “ Lake Bell’s cabin ”, coll. J. W. Chapman, 22 May 1940; 6 workers (MCZ), Dumaguete, coll. J. W. Chapman, 29 March 1924; 5 workers (MCZ), same locality and collector; 9 workers (MCZ), same locality and collector, except 1,000 – 1,500 ft. a. s. l.; 5 workers (MCZ), same locality and collector, except 1,500 ft. a. s. l.; 3 workers (MCZ) same locality and collector, except 2,000 ft.	en	Zettel, Herbert, Laciny, Alice, Balàka, Pia, General, David Emmanuel M. (2018): On the taxonomy of Myrmicaria Saunders, 1842 (Hymenoptera: Formicidae) in the Philippines. Raffles Bulletin of Zoology 66: 610-623, DOI: 10.5281/zenodo.5360475
0F1B87DF45500130FF71F91633CA73E4.taxon	diagnosis	Diagnosis (worker). In exact full-face view, eyes not touching outline of head. Scape relatively short, SI = 92 – 100. Sides of mesonotum weakly bulging; posterior surface with longitudinal rugae. Medial carina of mesonotum extended onto base of propodeum. Propodeal spines moderately long, slightly directed dorsocaudally, not continuing dorsal outline of propodeum. Peduncle of petiole moderately long. Base of gaster tergite 1 without striation. Gaster usually infuscated except anterior part of tergite 1.	en	Zettel, Herbert, Laciny, Alice, Balàka, Pia, General, David Emmanuel M. (2018): On the taxonomy of Myrmicaria Saunders, 1842 (Hymenoptera: Formicidae) in the Philippines. Raffles Bulletin of Zoology 66: 610-623, DOI: 10.5281/zenodo.5360475
0F1B87DF45500130FF71F91633CA73E4.taxon	description	Description (worker). Measurements of holotype: HW 1.40; HL 1.36; SL 1.35; SW 0.14; TL 6.20; Pmin 0.16; PW 0.40; PPW 0.41; SpD 0.42; PrL 0.87; FeL 1.92; ML 1.79; PnW 1.01; CI 103; SI 96; FeI 137. Measurements of paratypes: min-max (n = 31): HW 1.25 – 1.51; HL 1.22 – 1.49; SL 1.24 – 1.43; SW 0.12 – 0.16; TL 5.35 – 6.85; Pmin 0.13 – 0.21; PW 0.35 – 0.42; PPW 0.36 – 0.45; SpD 0.36 – 0.46; PrL 0.77 – 1.01; FeL 1.73 – 2.09; ML 1.57 – 1.99; PnW 0.85 – 1.14; CI 99 – 110; SI 92 – 100; FeI 125 – 143. Structures: Head (Fig. 11) roundish to slightly transverse; posteriorly with strong piliferous punctures; most areas dorsally and laterally with relatively strong longitudinal rugae. Temples slightly swollen; eyes not touching outline of head in exact full-face view. Clypeus with distinct, complete median carina and few longitudinal rugae. Mandible with sharp longitudinal rugae; apical margin with four teeth. Entire mesosoma, dorsally and laterally, with predominantly longitudinal rugae, with very few transverse elements, except for the strong transverse ridge at midline of mesonotum and a second (often complete) ridge near its anterior margin. A strong median carina from anterior margin of pronotum onto base of propodeum. Pronotum with relatively short, rather ventrally directed teeth that are weakly protruding laterally. Sides of mesonotum slightly bulging. Metanotal groove narrow and deep, in dorsolateral view lateral margin forming a very obtuse angle. On propodeum, the area between bases of spines moderately concave. Propodeal spines moderately long, directed strongly upwards, slightly diverging. Nodes of petiole and postpetiole rounded; peduncle of petiole comparatively short. Gaster with piliferous punctures; base of gaster tergite 1 without striation. Setae abundant on trunk and appendages. Dorsal setiferation composed of two types of setae; short setae about half as long as long ones (but somewhat longer on gaster). On head dorsum, petiole and postpetiole all setae suberect. Short setae abundant on mesosoma sides, but scarce on its dorsum. On gaster, long setae suberect, short setae subdecumbent anteriorly, suberect posteriorly. Colour of trunk yellowish brown, except gaster more strongly infuscated. In many paratypes, trunk yellow, obviously faded from previous storage in ethanol. All appendages yellow. All setae pale yellow. Comparative notes. Myrmicaria chapmani new species is so far the only species known from Negros. The combination of a long median carina on the mesosoma that reaches the base of propodeum (Fig. 19) and the non-striate base of gaster (Fig. 12) distinguishes it clearly from Philippine congeners. Due to slightly swollen temples, the eyes are not touching the outline of the head in full-face view (Fig. 11). This character is almost unique among Philippine Myrmicaria species (seen also in two aberrant specimens of an undescribed species from Luzon).	en	Zettel, Herbert, Laciny, Alice, Balàka, Pia, General, David Emmanuel M. (2018): On the taxonomy of Myrmicaria Saunders, 1842 (Hymenoptera: Formicidae) in the Philippines. Raffles Bulletin of Zoology 66: 610-623, DOI: 10.5281/zenodo.5360475
0F1B87DF45500130FF71F91633CA73E4.taxon	distribution	Distribution. Myrmicaria chapmani new species is known from a few localities in the south-eastern part of Negros Island. No other Myrmicaria species are known from Negros.	en	Zettel, Herbert, Laciny, Alice, Balàka, Pia, General, David Emmanuel M. (2018): On the taxonomy of Myrmicaria Saunders, 1842 (Hymenoptera: Formicidae) in the Philippines. Raffles Bulletin of Zoology 66: 610-623, DOI: 10.5281/zenodo.5360475
0F1B87DF455E0134FC38FB9233D57254.taxon	description	(Figs. 13 – 16, 20)	en	Zettel, Herbert, Laciny, Alice, Balàka, Pia, General, David Emmanuel M. (2018): On the taxonomy of Myrmicaria Saunders, 1842 (Hymenoptera: Formicidae) in the Philippines. Raffles Bulletin of Zoology 66: 610-623, DOI: 10.5281/zenodo.5360475
0F1B87DF455E0134FC38FB9233D57254.taxon	etymology	Etymology. Named after the characteristic transverse keel on the propodeum.	en	Zettel, Herbert, Laciny, Alice, Balàka, Pia, General, David Emmanuel M. (2018): On the taxonomy of Myrmicaria Saunders, 1842 (Hymenoptera: Formicidae) in the Philippines. Raffles Bulletin of Zoology 66: 610-623, DOI: 10.5281/zenodo.5360475
0F1B87DF455E0134FC38FB9233D57254.taxon	materials_examined	Material examined. Holotype (worker) (NMNH) from Luzon Island, Sorsogon Province, San Roque, Palok Tok Falls, 26 February. Paratypes: 6 workers (NHMW, CZW) from the same locality.	en	Zettel, Herbert, Laciny, Alice, Balàka, Pia, General, David Emmanuel M. (2018): On the taxonomy of Myrmicaria Saunders, 1842 (Hymenoptera: Formicidae) in the Philippines. Raffles Bulletin of Zoology 66: 610-623, DOI: 10.5281/zenodo.5360475
0F1B87DF455E0134FC38FB9233D57254.taxon	diagnosis	Diagnosis (worker). Clypeus with pronounced median carina. Scape long, SI = 104 – 110. Sides of mesonotum angularly elevated; posterior surface with reduced sculpture; posterior margin convex. Rugae on metapleura and sides of propodeum reduced. Propodeal spines moderately long, directed caudally, continuing dorsal outline of propodeum. Propodeum deeply furrowed between bases of spines. Peduncle of petiole moderately long. Base of gaster tergite 1 without striation. Gaster usually completely infuscated.	en	Zettel, Herbert, Laciny, Alice, Balàka, Pia, General, David Emmanuel M. (2018): On the taxonomy of Myrmicaria Saunders, 1842 (Hymenoptera: Formicidae) in the Philippines. Raffles Bulletin of Zoology 66: 610-623, DOI: 10.5281/zenodo.5360475
0F1B87DF455E0134FC38FB9233D57254.taxon	description	Description (worker). Measurements of holotype: HW 1.34; HL 1.29; SL 1.46; SW 0.15; TL 5.87; Pmin 0.14; PW 0.36; PPW 0.39; SpD 0.37; PrL 0.87; FeL 2.02; ML 1.73; PnW 0.85; CI 103; SI 109; FeI 151. Measurements of paratypes: min – max (n = 6): HW 1.25 – 1.46; HL 1.20 – 1.43; SL 1.37 – 1.54; SW 0.14 – 0.16; TL 5.51 – 6.20; Pmin 0.13 – 0.17; PW 0.33 – 0.40; PPW 0.36 – 0.44; SpD 0.29 – 0.36; PrL 0.78 – 0.90; FeL 1.86 – 2.12; ML 1.63 – 1.89; PnW 0.78 – 0.95; CI 102 – 105; SI 104 – 110; FeI 143 – 153. Structures: Head (Fig. 15) roundish, hardly wider than long; medioposteriorly with strong piliferous punctures; dorsal and lateral areas with longitudinal rugae. Clypeus with pronounced complete median carina and few longitudinal rugae. Mandible with sharp longitudinal rugae; apical margin with four teeth. Mesosoma with a median carina starting from anterior third of pronotum, reaching posterior fourth of mesonotum. Pronotum with transverse rugae in anterior third, and longitudinal rugae in posterior two thirds; anteroventral teeth short, hardly protruding at sides. Mesonotum, in addition to median carina, with a strongly developed transverse carina at mid-length; anteriorly with an additional transverse carina, sometimes rather reticulated, posteriorly with or without additional longitudinal rugae; sides strongly elevated. Metanotal groove narrow and deep; in dorsolateral view, lateral margin forming an acute angle. Pro- and mesopleura with longitudinal rugae, metapleura and sides of propodeum almost smooth. Dorsum of propodeum with reduced sculpture, except for a distinct transverse carina anteriorly; area between bases of spines deeply impressed. Propodeal spines moderately long and straight, directed caudally, slightly diverging, at base continuing dorsal outline of propodeum. Nodes of petiole and postpetiole rounded; peduncle of petiole moderately long. Gaster with piliferous punctures; base of gaster tergite 1 without striation. Setae abundant on trunk and appendages. Dorsal setiferation composed of two types of setae, short setae about half as long as long ones. On dorsum of head, petiole and postpetiole all setae suberect. On gaster, long setae suberect, short setae subdecumbent anteriorly, suberect posteriorly. Colour: Head medium brown, dorsally infuscated in some specimens. Mesosoma and nodes of petiole and postpetiole light brown; peduncle of petiole contrasting yellow. Gaster dark brown, almost black. Antenna yellow. Legs very light brown. All setae whitish. Comparative notes. Myrmicaria transversa new species differs from most Philippine species (described and undescribed) by the transverse carina on the dorsal surface of the propodeum (Fig. 20). In M. aphidicola and M. buenaventei new species, such a carina or short fractions of it are occasionally present, but M. aphidicola differs by the basal striation of the gaster and M. buenaventei new species has a very differently sculptured pronotum, prominent pronotal teeth, and short scapes. The reduced sculpture of the mesonotum, metapleura, sides of propodeum, and base of gaster place M. transversa new species in close relationship to a hitherto undescribed species from Luzon and Catanduanes. That species, however, is more gracile and possesses slightly upcurved propodeal spines and a relatively long petiolar peduncle.	en	Zettel, Herbert, Laciny, Alice, Balàka, Pia, General, David Emmanuel M. (2018): On the taxonomy of Myrmicaria Saunders, 1842 (Hymenoptera: Formicidae) in the Philippines. Raffles Bulletin of Zoology 66: 610-623, DOI: 10.5281/zenodo.5360475
0F1B87DF455E0134FC38FB9233D57254.taxon	distribution	Distribution. Although the genus is widespread in the southern part of Luzon Island (Bicol Region), this species has only been found at the type locality in Sorsogon Province.	en	Zettel, Herbert, Laciny, Alice, Balàka, Pia, General, David Emmanuel M. (2018): On the taxonomy of Myrmicaria Saunders, 1842 (Hymenoptera: Formicidae) in the Philippines. Raffles Bulletin of Zoology 66: 610-623, DOI: 10.5281/zenodo.5360475
