Yunodorylus doryloides

Yunodorylus doryloides
Scientific classification
Kingdom:	Animalia
Phylum:	Arthropoda
Class:	Insecta
Order:	Hymenoptera
Family:	Formicidae
Subfamily:	Dorylinae
Genus:	Yunodorylus
Species:	Y. doryloides
Binomial name
	Yunodorylus doryloides; (Borowiec, 2009) Specimen Labels

The type material was collected from a rainforest soil core. The other known sample, a worker, was found at an hypogaeic oil bait.

Identification

Borowiec (2009) - This species is most easily separated from its congeners by its peculiar falcate mandibles. These are elongate, somewhat resembling the condition observed in Dorylus, with the narrow masticatory margin equipped with two (excluding apical) well visible teeth and meeting the long basal margin at an obtuse angle, resulting in a wide gap between mandibles and clypeal margin at closure.

Keys including this Species

Key to Yunodorylus

Distribution

Known from Malaysia and Sabah.

Distribution based on Regional Taxon Lists

Indo-Australian Region: Borneo (type locality), Indonesia, Malaysia.

Distribution based on AntMaps

Distribution based on AntWeb specimens

Check data from AntWeb

Countries Occupied

Number of countries occupied by this species based on AntWiki Regional Taxon Lists. In general, fewer countries occupied indicates a narrower range, while more countries indicates a more widespread species.

Estimated Abundance

Relative abundance based on number of AntMaps records per species (this species within the purple bar). Fewer records (to the left) indicates a less abundant/encountered species while more records (to the right) indicates more abundant/encountered species.

Biology

Castes

Known only from the worker caste.

Nomenclature

The following information is derived from Barry Bolton's Online Catalogue of the Ants of the World.

doryloides. Cerapachys doryloides Borowiec, M.L. 2009: 46, figs. 1, 2, 13 (w.) BORNEO (East Malaysia: Sarawak).
- Type-material: holotype worker.
- Type-locality: Malaysia: Sarawak, Bako Nat. Park, nr Kuching, iv.1978, soil core, rainforest (N.M. Collins).
- Type-depository: BMNH.
- Combination in Yunodorylus: Borowiec, M.L. 2016: 237.
- Status as species: Pfeiffer, et al. 2011: 33.
- Distribution: Malaysia (Sarawak).

Unless otherwise noted the text for the remainder of this section is reported from the publication that includes the original description.

Description

Worker

Holotype. HW 0.62, HL 0.64, SL 0.32, MH 0.41, ML 0.95, PrW 0.42, PW 0.31, PL 0.30, IIIAW 0.45, IIIAL 0.35, IVAW 0.60, IVAL 0.41, FFeW 0.19, FFeL 0.45, HFeL 0.45, FTiL 0.37, HTiL 0.47, FBaL 0.23, HBaL 0.29, CI 103, MI 232, PI 97.

Head almost as wide as long, widest at about midlength; sides parallel, slightly convex and converging anteriorly and posteriorly at about one fifth of head length; vertexal margin shallowly concave. Parafrontal ridges completely absent. Mandibles narrow and long; when closed, basal margin separated from anterior clypeal margin by wide gap. Basal margin long, meeting masticatory at obtuse angle; masicatory margin with two blunt teeth basally; remainder of margin elongated into broadly rounded apical tooth. Lateroclypeal tooth a small tubercle. Lateral portion of clypeus poorly developed, consisting only of semi-circular ridge surrounding antennal insertion. Antennae 12-segmented. Palp formula unknown.

Mesosoma moderately stout, rectangular in dorsal view; dorsal surface flattened, bordered at the lateral sides by a distinct angle but with no margin. Openings of propodeal spiracles broadly oval, directed outwardly and upwardly at angle of 45°. Declivous face of propodeum immarginate above propodeal lobes. Propodeal lobes very small. Front femur short, very broad, and laterally compressed. Metatibial gland a whitish, elongate patch of cuticle, little longer than maximum width of hind tibia.

Petiole about as long as wide, with well developed dorsal and posterior faces. Subpetiolar process short and moderately broad; in side view with ventral margin sloping towards posterior end; translucent narrowing present along ventral margin, lamella gradually widening distally.

Abdominal tergite III wide relative to following segment, in side view the whole segment is robust, with developed anterior, perpendicular face.

Pygidial field small, weakly impressed with four teeth on each side.

Hypopygidium unarmed.

Mandibles sculptured with widely spaced punctures, interspaces shining. Head with regular punctures, spaced from about half of their diameter on dorsal and anterior lateral surfaces, to wider than diameter in posterior lateral section. Similar sculpture on dorsal surface of mesosoma with longitudinal stripe devoid of sculpturation in middle. All interspaces shining. Lateral sides of mesosoma microreticulate, only area around propodeal spiracle devoid of any sculpture and shining. Sides of petiole microreticulate.

Body pilosity composed of (1) dense, subdecumbent hairs present on head, mesosoma, and abdominal segments and (2) about one and half times longer, subdecumbent to suberect hairs present on the pronotal shoulders, propodeum, petiole, margins of gastral tergites. Outer surface of middle tibiae with two modified peg-like setae.

Color: yellowish-orange with brownish mandibles and genal areas around mandibular insertions.

Type Material

Holotype worker. MALAYSIA: Sarawak, Bako National Park, near Kuching, rainforest, soil core, IV 1978 (N. M. Collins) The Natural History Museum.

References

References based on Global Ant Biodiversity Informatics

Borowiec M. L. 2009. New ant species related to Cerapachys sexspinus and discussion of the status of Yunodorylus (Hymenoptera: Formicidae). Zootaxa 2069: 43-58.
Borowiec M. L. 2009. New species related to Cerapachys sexspinus and discussion of the status of Yunodorylus. Zootaxa 2069: 43-58.
Pfeiffer M.; Mezger, D.; Hosoishi, S.; Bakhtiar, E. Y.; Kohout, R. J. 2011. The Formicidae of Borneo (Insecta: Hymenoptera): a preliminary species list. Asian Myrmecology 4:9-58