Odontomachus Latreille 1804
Creators: name: Eguchi, Katsuyuki
name: Viet, Bui Tuan
name: Yamane, Seiki
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Formicidae
Odontomachus

description: Odontomachus Latreille, 1804
Taxonomy. The genus Odontomachus is assigned to the tribe Ponerini (Bolton 2003).
Morphology. Workers of Vietnamese species have the following features (see also Schmidt & Shattuck 2014):
Worker monomorphic; head in full-face view subrectangular, with a constriction a little behind midlength of head; vertexal lobe well developed; vertex with a median longitudinal carina which meet the dorsalmost part of preoccipital carina; posterior face of head (inside preoccipital carina) with a pair of dark lines which meet together at or near dorsalmost part of preoccipital carina; frontal lobe horizontal, partly to largely concealing antennal insertion; antennal scrobe absent; submedian portion of clypeus weakly expanded above each mandibular base; posteromedian portion of clypeus relatively narrowly inserted between frontal lobes; mandible long and straight, inserted at middle of anterior margin of head; three apical teeth forming a fork; subapical tooth often present as an angle or small triangular tooth; masticatory margin serrate, and ventrally with a low of several long setae; antenna 12-segmented, filiform; scape slender and long; eye located on anterodorsal face of anterolateral convexity of head; mesosoma relatively long and slender; pronotum and mesosoma in lateral view forming a low dome; promesonotal suture completely separating pronotum from mesonotum; mesopleuron defined strongly to faintly from mesonotum by a suture and/or carina, and defined well from metapleuron by a suture and/or carina; metanotal groove shallowly to moderately impressed, or sometimes inconspicuous dorsally; propodeum in lateral view with a relatively long and straight dorsal outline; propodeal spines absent; orifice of propodeal spiracle elliptical to slitlike; propodeal lobe very low or absent; apicoventral part of foretibia with a small simple spur behind a large pectinate spur; apicoventral part of mid and hind tibia with a simple spur in front of a large pectinate spur; anterior peduncle of petiole reduced or absent; petiolar node in lateral view high, tapering to a single spinous dorsal apex; subpetiolar process developed as a lobe; girdling constriction between abdominal segments III and IV indistinct; abdominal sternite III with a distinct anteroventral flange beneath helcium; sting well developed.
Differentiation. The worker of Odontomachus is most similar to that of Anochetus, but in the latter the posterior face of head inside preoccipital carina lacks a pair of dark lines; vertex lacks a median longitudinal carina.
Vietnamese species (6 spp.).
O. silvestri Wheeler, 1927 [senior synonym of O. silvestri substriatus Wheeler, 1927]. Type locality of O. silvestri: Dong Mo [probably in northern Vietnam]; type locality of “ O. silvestri substriatus ”: Tocco [unidentified locality name]. Au (Bac Kan, Ba Vi, Chua Yen Tu, Cuc Phuong, Pu Mat, Sa Pa, Van Ban), Rad (Cuc Phoung).
O. monticola Emery, 1892. Au (Ba Be, Chua Yen Tu, Tay Yen Tu, Van Ban), Rad (Cuc Phuong).
O. rixosus F. Smith, 1857. Zry (Cat Tien).
O. simillimus F. Smith, 1858. Rad (nr. Ha Noi), Zry (Cat Tien).
O. sp. eg-2 [= sp. 13 of SKY in Eguchi, Bui et al. (2005); cf. O. xizangensis Wang, 1993] (Ba Vi, Sa Pa, Tam Dao, Van Ban)
O. sp. eg-4 (Phu Quoc).
Bionomics. Odontomachus spp. usually occur in well-developed forests and other wooded habitats. They nest in rotting logs and wood fragments, and in litter and soil.
description: Published as part of Eguchi, Katsuyuki, Viet, Bui Tuan & Yamane, Seiki, 2014, Generic Synopsis of the Formicidae of Vietnam (Insecta: Hymenoptera), Part II — Cerapachyinae, Aenictinae, Dorylinae, Leptanillinae, Amblyoponinae, Ponerinae, Ectatomminae and Proceratiinae, pp. 1-46 in Zootaxa 3860 (1) on page 37, DOI: 10.11646/zootaxa.3860.1.1, http://zenodo.org/record/287059