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Dilobocondyla
| Dilobocondyla | |
|---|---|
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| Dilobocondyla fouqueti | |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Class: | Insecta |
| Order: | Hymenoptera |
| Family: | Formicidae |
| Subfamily: | Myrmicinae |
| Tribe: | Crematogastrini |
| Alliance: | Myrmecina genus group |
| Genus: | Dilobocondyla Santschi, 1910 |
| Type species | |
| Atopomyrmex selebensis, now Dilobocondyla selebensis | |
| Diversity | |
| 22 species (Species Checklist, Species by Country)
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| Synonyms | |
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A small genus restricted to the Oriental and Indo-Australian Regions that is known to be arboreal (Wheeler, 1924).
Identification
Zettel and Bruckner (2013) - Worker (modified from Bolton 1994, General & Alpert 2012): Head massive, with posterior corners angulate or dentate. Frontal carinae well-developed. Antennal scrobe present dorsal of eye. Clypeus medially slightly emarginated, with stout median seta. Mandible striated, with six teeth on masticatory margin, with unarmed basal margin. Antenna twelve-segmented, apically with moderately widened three-segmented club. Pronotum with toothed corners. Propodeum without teeth; propodeal lobes large and rounded in Philippine species. Petiole almost cylindrical, lacking a distinct node, anteroventrally toothed. Head and mesosoma with rugous, often coarse sculpture; gaster with microsculpture. Entire body including scape, femora, tibiae, and first tarsomeres with erect, stout setae.
Yellowish to light brown. Posterior margin of head concave. Frontal carinae strong, reaching posterior corners of head. Sculpture on head coarse, on mesosoma moderately coarse; interspaces on head reticulated and matt, on mesosoma, petiole, and postpetiole usually smooth, only mesosoma dorsally with reduced micropuncturation and petiole anterodorsally reticulated. Petiole very slender; PtI 202 - 210.
Eguchi, Bui and Yamane (2011) - Worker monomorphic; head in full-face view subrectangular; preoccipital carina distinct laterally; posterolateral corner of head with a small acute angle or denticle exterior to preoccipital carina; frontal carina distinct; antennal scrobe shallow but distinct; median portion of clypeus broadly inserted between frontal lobes; anterior clypeal margin weakly convex and with a weak emargination at midpoint; median clypeal seta, if present, indistinct; mandible triangular, with 6 teeth on masticatory margin; antenna 12-segmented, with conspicuous 3-segmented club; eye relatively large; promesonotum in lateral view hardly or weakly raised; promesonotal suture absent dorsally; metanotal groove weakly impressed dorsally; propodeum in lateral view weakly swollen posterodorsad, unarmed; propodeal lobe well developed; femora strongly and abruptly incrassate in distal two thirds; petiole elongate, cylindrical, slightly arcuate in lateral view; subpetiolar process distinct, tooth-like, located anteroventrally near articulation with mesosoma; postpetiole in lateral view with acute anteroventral angle; gaster short, oval in dorsal view.
The worker of Dilobocondyla is easily distinguished from that of other myrmicine genera known from Vietnam by posterolateral corner of head with a small acute angle or denticle exterior to preoccipital carina, propodeum unarmed, femora strongly and abruptly incrassate, and petiole elongate and sylindrical.
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See images of species within this genus |
Keys including this Genus
Keys to Species in this Genus
Distribution
Distribution and Richness based on AntMaps
Species by Region
Number of species within biogeographic regions, along with the total number of species for each region.
| Afrotropical Region | Australasian Region | Indo-Australian Region | Malagasy Region | Nearctic Region | Neotropical Region | Oriental Region | Palaearctic Region | |
|---|---|---|---|---|---|---|---|---|
| Species | 0 | 1 | 14 | 0 | 0 | 0 | 7 | 3 |
| Total Species | 2851 | 1736 | 3047 | 932 | 840 | 4391 | 1767 | 2925 |
Biology
Wheeler's remarks, from 1924, still largely sum up what we know about these ants: All the species of Dilobocondyla seem to be rare and very local ants and are therefore known mostly from single specimens. Like the species of the allied genus Podomyrma they nest as rather small colonies in the wood of living trees.
We have rarely encountered foraging workers of Dilobocondyla (in Vietnam) on leaves in undergrowth of natural and man-made forests. (Eguchi, Bui and Yamane 2011)
Castes
Queen
- The following images are provided by AntWeb
Head view
Side view
Top view
Specimen labels
Morphology
Worker Morphology
Explore: Show all Worker Morphology data or Search these data. See also a list of all data tables or learn how data is managed.
- Antennal segment count: 12
- Antennal club: 3
- Palp formula: 4,3; 3,3
- Spur formula: 0,0
- Sting: present
Male Morphology
- Explore: Show all Male Morphology data or Search these data. See also a list of all data tables or learn how data is managed.
• Antennal segment count 13 • Antennal club 0 • Palp formula 4,3 • Total dental count 5 • Spur formula 0, 0
Phylogeny
See Phylogeny of Myrmicinae for details.
Nomenclature
The following information is derived from Barry Bolton's Online Catalogue of the Ants of the World.
- DILOBOCONDYLA [Myrmicinae: Formicoxenini]
- Dilobocondyla Santschi, 1910h: 283. Type-species: Atopomyrmex selebensis, by subsequent designation of Wheeler, W.M. 1911f: 162.
- Dilobocondyla senior synonym of Mesomyrma: Emery, 1912b: 102.
- MESOMYRMA [junior synonym of Dilobocondyla]
- Mesomyrma Stitz, 1911a: 363 [as subgenus of Podomyrma]. Type-species: Podomyrma (Mesomyrma) cataulacoidea, by monotypy.
- Mesomyrma junior synonym of Dilobocondyla: Emery, 1912b: 102; Emery, 1924d: 240.
References
- Blaimer, B.B., Ward, P.S., Schultz, T.R., Fisher, B.L., Brady, S.G. 2018. Paleotropical diversification dominates the evolution of the hyperdiverse ant tribe Crematogastrini (Hymenoptera: Formicidae). Insect Systematics and Diversity 2(5): 3; 1-14 (doi:10.1093/isd/ixy013).
- Bolton, B. 2003. Synopsis and Classification of Formicidae. Mem. Am. Entomol. Inst. 71: 370pp (page 246, Dilobocondyla in Myrmicinae, Formicoxenini)
- Cantone S. 2018. Winged Ants, The queen. Dichotomous key to genera of winged female ants in the World. The Wings of Ants: morphological and systematic relationships (self-published).
- Dlussky, G. M.; Fedoseeva, E. B. 1988. Origin and early stages of evolution in ants. Pp. 70-144 in: Ponomarenko, A. G. (ed.) Cretaceous biocenotic crisis and insect evolution. Moskva: Nauka, 232 pp. (page 79, Dilobocondyla in Myrmicinae, Podomyrmini)
- Emery, C. 1912b. Études sur les Myrmicinae. [I-IV.]. Ann. Soc. Entomol. Belg. 56: 94-105 (page 102, Dilobocondyla senior synonym of Mesomyrma; page 105, Dilobocondyla in Myrmicinae, Myrmecinini)
- Emery, C. 1914e. Intorno alla classificazione dei Myrmicinae. Rend. Sess. R. Accad. Sci. Ist. Bologna Cl. Sci. Fis. (n.s.) 18: 29-42 (page 41, Dilobocondyla in Myrmicinae, Myrmecinini)
- Emery, C. 1924f [1922]. Hymenoptera. Fam. Formicidae. Subfam. Myrmicinae. [concl.]. Genera Insectorum 174C: 207-397 (page 240, Dilobocondyla in Myrmicinae, Myrmecinini [subtribe Podomyrmini])
- Forel, A. 1917. Cadre synoptique actuel de la faune universelle des fourmis. Bull. Soc. Vaudoise Sci. Nat. 51: 229-253 (page 244, Dilobocondyla in Myrmicinae, Myrmecinini)
- Jansen, G., Savolainen, R. 2010. Molecular phylogeny of the ant tribe Myrmicini (Hymenoptera: Formicidae). Zoological Journal of the Linnean Society 160(3), 482–495 (doi:10.1111/j.1096-3642.2009.00604.x).
- Santschi, F. 1910h. Deux nouvelles fourmis du Tonkin. Naturaliste 32: 283-284 (page 283, Dilobocondyla as genus)
- Wheeler, W. M. 1911g. A list of the type species of the genera and subgenera of Formicidae. Ann. N. Y. Acad. Sci. 21: 157-175 (page 162, Type-species: Atopomyrmex selebensis; by subsequent desgination)
- Wheeler, W. M. 1922i. Ants of the American Museum Congo expedition. A contribution to the myrmecology of Africa. VII. Keys to the genera and subgenera of ants. Bull. Am. Mus. Nat. Hist. 45: 631-710 (page 663, Dilobocondyla in Myrmicinae, Myrmecinini)
- Wheeler, W. M. 1924c. Ants of Krakatau and other islands in the Sunda Strait. Treubia 5: 239-258 (page 248, Key to species)