Aenictus paradentatus
Aenictus paradentatus | |
---|---|
Scientific classification | |
Kingdom: | Animalia |
Phylum: | Arthropoda |
Class: | Insecta |
Order: | Hymenoptera |
Family: | Formicidae |
Subfamily: | Dorylinae |
Genus: | Aenictus |
Species: | A. paradentatus |
Binomial name | |
Aenictus paradentatus Jaitrong & Yamane, 2012 |
Aenictus paradentatus occurs from low-lands to highlands (up to 1,300 m a.s.l., Doi Ang Khang, N. Thailand) and inhabits primary and disturbed forests (rarely marching even in grasslands in the mountain range of N. Vietnam). It has been observed preying on other ants such as species of Leptogenys (Vietnam, VN98-SKY-15), Oecophylla (Thailand, HKK10-06-06), Pachycondyla (Laos, WJT10-LAO16) and Pheidole (Vietnam, VN98-SKY-15), and also on termites, Macrotermes sp. (Laos, WJT10-LAO12).
Identification
A member of the pachycerus group. Jaitrong, Yamane and Wattanachai (2012) - Aenictus paradentatus and Aenictus dentatus are very similar in general appearance as they share the distinctive coarse sculpture on head and mesosoma, and the relatively long antennal scape, extending beyond the posterior margin of the head. However, they differ in several significant characters. The antennal scape is relatively shorter in A. paradentatus (SI 117 - 124) than in A. dentatus (SI 143-152). No overlap is observed in HW / SL between the species. The posterior portion of the head in full-face view is relatively broader in A. paradentatus than in A. dentatus. The first gastral tergite is weakly shagreened with smooth interspaces in the former, while it is wholly smooth and shiny in the latter. The petiole has no peduncle in the former, but has a short but distinct peduncle in the latter.
Keys including this Species
Distribution
Vietnam, Laos, and Thailand
Latitudinal Distribution Pattern
Latitudinal Range: 21.91136111° to 14.9°.
North Temperate |
North Subtropical |
Tropical | South Subtropical |
South Temperate |
- Source: AntMaps
Distribution based on Regional Taxon Lists
Oriental Region: Laos, Thailand (type locality), Vietnam.
Palaearctic Region: China.
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.
- paradentatus. Aenictus paradentatus Jaitrong & Yamane, in Jaitrong, Yamane & Tasen, 2012: 136, figs. 6-12 (w.) THAILAND.
- Type-material: holotype worker, 17 paratype workers.
- Type-locality: holotype Thailand: Chiang Mai Prov., Muang Dist., Doi Suthep-Pui Nat. Park, 20.viii.1998, WJT98-PD01 (W. Jaitrong); paratypes with same data.
- Type-depositories: TNHM (holotype); BMNH, MCZC, MHNG, SKYC, TNHM (paratypes).
- Status as species: Jaitrong & Wiwatwitaya, 2013: 98 (in key); Liu, C., Guénard, et al. 2015: 28; Jaitrong, Guénard, et al. 2016: 26; Khachonpisitsak, et al. 2020: 30.
- Distribution: China, Laos, Thailand, Vietnam.
Unless otherwise noted the text for the remainder of this section is reported from the publication that includes the original description.
Description
Worker
(holotype and paratypes). Measurements of holotype: TL 4.65 mm; HL 1.03 mm; HW 0.90 mm; SL 1.08 mm; ML 1.53 mm; PL 0.33 mm; CI 88; SI 119. Paratypes (n = 9): TL 4.55 - 4.65 mm; HL 0.95 - 1.05 mm; HW 0.80 - 0.93 mm; SL 0.93 - 1.08 mm; ML 1.50 - 1.55 mm; PL 0.33 - 0.35 mm; CI 83 - 88; SI 117 - 124.
Head in full-face view round, slightly longer than broad, with convex sides and posterior margin; occipital carina bearing distinct collar. Antenna 10-segmented; scape long, extending beyond posterolateral corner of head; funicular segment I almost as long as II, but slightly shorter than III - VI; apical segment almost as long as three previous ones. Frontal carinae well developed, fused at level of antennal base to form a single carina, extending less than half length of head, very poorly developed in posterior half. Parafrontal ridge well developed, extending 1/3 of head length; seen in profile, its anteriormost part well devel-oped and subtriangular. Clypeus short and roundly produced anteriorly, lacking anterior denticles. Mandible triangular, its masticatory margin with large apical tooth, fol-lowed by 11 - 12 denticles; basal margin of mandible lacking denticles. Mesosoma rather elongate and stout; pro-mesonotum in profile with strongly convex dorsum, sloping gradually to metanotal groove; propodeum lower and with almost straight dorsum; mesopleuron not demarcated from metapleuron; propodeal junction acutely angulated, protruding as ridge that is often slightly upward directed; declivity of propodeum shallowly concave, encircled with very narrow rim. Petiole almost as long as high without peduncle, its dorsal outline elevated posteriorly; subpetiolar process generally very low, its ventral outline weakly convex. Postpetiole seen in profile slightly larger than petiole, its dorsal outline elevated posteriorly. Gaster elliptical, narrowed anteriorly and posteriorly.
Head, mesosoma, petiole and postpetiole entirely and densely micropunctate and opaque. In addition, promesonotum dorsally rugose, laterally with approximately ten longitudinal rugae; dorsal petiolar surface with longitudi-nal or irregular rugae. First gastral segment very weakly shagreened with smooth and shiny interspaces, except in basalmost part with dense micropunctures.
Head and mesosoma with relatively dense standing hairs; length of longest pronotal hairs 0.43 - 0.45 mm. Entire body dark reddish brown or dark brown. Typhlatta spot absent.
Type Material
Holotype: worker from Doi Suthep-Pui National Park, Muang Dist., Chiang Mai Prov., N. Thailand, 20. VIII.1998, W. Jaitrong leg., WJT98-PD01 (THNHM). Paratypes: 17 workers, same data as holotype (BMNH, MCZC, MHNG, SKYC, THNHM).
Etymology
The specific epithet paradentatus is a compound word meaning "similar to dentatus". Non-type materials examined.
References
- Jaitrong, W.; Wiwatwitaya, D. 2013. Two new species of the Aenictus pachycerus species group (Hymenoptera: Formicidae: Aenictinae) from Southeast Asia. Raffles Bulletin of Zoology. 61:97-102.
- Jaitrong, W., Yamane, S. & Tasen, W. 2012. A sibling species of Aenictus dentatus FOREL, 1911 (Hymenoptera: Formicidae) from continental Southeast Asia. Myrmecological News. 16:133-138.
- Khachonpisitsak, S., Yamane, S., Sriwichai, P., Jaitrong, W. 2020. An updated checklist of the ants of Thailand (Hymenoptera, Formicidae). ZooKeys 998, 1–182 (doi:10.3897/zookeys.998.54902).
- Liu, C., Fischer, G., Hita Garcia, F., Yamane, S., Liu, Q., Peng, Y.Q., Economo, E.P., Guénard, B., Pierce, N.E. 2020. Ants of the Hengduan Mountains: a new altitudinal survey and updated checklist for Yunnan Province highlight an understudied insect biodiversity hotspot. ZooKeys 978, 1–171 (doi:10.3897/zookeys.978.55767).
References based on Global Ant Biodiversity Informatics
- Borowiec M. L. 2016. Generic revision of the ant subfamily Dorylinae (Hymenoptera, Formicidae). ZooKeys 608: 1–280.
- Eguchi K., B. T. Viet, and S. Yamane. 2014. Generic Synopsis of the Formicidae of Vietnam (Insecta: Hymenoptera), Part IICerapachyinae, Aenictinae, Dorylinae, Leptanillinae, Amblyoponinae, Ponerinae, Ectatomminae and Proceratiinae. Zootaxa 3860: 001-046.
- Jaitron W., and D. Wiwatwitaya. 2013. Two new species of the Aenictus pachycerus species group (Hymenoptera: Formicidae: Aenictinae) from southeast Asia. The Raffles Bulletin of Zoology 61(1): 97-102.
- Jaitrong W. 2015. A revision of the Thai species of the ant genus Aenictus Shuckard, 1840 (Hymenoptera: Formicidae: Dorylinae). The Thailand Natural History Museum Journal 9(1): 1-94.
- Jaitrong W., B. Guenard, E. P. Economo, N. Buddhakala, and S. Yamane. 2016. A checklist of known ant species of Laos (Hymenoptera: Formicidae). Asian Myrmecology 8: 1-32. DOI: 10.20362/am.008019
- Jaitrong W.; Yamane, S.; Tasen, W. 2012. A sibling species of Aenictus dentatus Forel, 1911 (Hymenoptera: Formicidae) from continental Southeast Asia. Myrmecological News 16:133-138.
- Liu C, B. Guénard, F Hita Garcia, S. Yamane, B. Blanchard, and E. Economo. New records of ant species from Yunnan, China. Submitted to Zookeys
- Zryanin V. A. 2015. Important supplements to the ant fauna of Vietnam. Proceedings of the 10th ANeT International Conference, 23-26 October 2015, University of Kelaniya, Sri Lanka. 24.