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Ancyridris
| Ancyridris | |
|---|---|
| |
| Ancyridris polyrhachioides | |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Class: | Insecta |
| Order: | Hymenoptera |
| Family: | Formicidae |
| Subfamily: | Myrmicinae |
| Tribe: | Crematogastrini |
| Alliance: | Lordomyrma genus group |
| Genus: | Ancyridris Wheeler, W.M., 1935 |
| Type species | |
| Ancyridris polyrhachioides | |
| Diversity | |
| 2 species (Species Checklist, Species by Country)
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Beyond the two taxonomic publications that detail the two species in this genus (Ancyridris polyrhachioides and Ancyridris rupicapra), nothing is known about these ants.
Blaimer et al. (2018) found that Lordomyrma as presently defined is paraphyletic with respect to the genera Lasiomyrma, Propodilobus and Ancyridris. They also found that these four genera occur within a paraphyletic Mayriella genus-group (which includes Dacatria, Kartidris, Mayriella, Proatta and Tetheamyrma).
Identification
The hooked end of the long propodeal spines, curved towards the head, and the rearward bending elongate petiole spines are a distinctive feature of both species of this genus. Beyond this the genus is similar to Aphaenogaster or certain worker forms of Pheidole.
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See images of species within 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 | 0 | 2 | 0 | 0 | 0 | 0 | 0 |
| Total Species | 2840 | 1735 | 3042 | 932 | 835 | 4378 | 1740 | 2862 |
Biology
Castes
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: 2-3 • Palp formula: 3,2; 2,2 • Total dental count: 7-9 • Eyes: present - ? ommatidia • Scrobes: absent • 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.
• Caste unknown
Phylogeny
| Myrmicinae |
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See Phylogeny of Myrmicinae for details.
Nomenclature
The following information is derived from Barry Bolton's Online Catalogue of the Ants of the World.
- ANCYRIDRIS [Myrmicinae: Stenammini]
- Ancyridris Wheeler, W.M. 1935a: 1. Type-species: Ancyridris polyrhachioides, by original designation.
- [Ancyridris provisional junior synonym of Lordomyrma: Brown, 1973b: 178 (unconfirmed).]
Unless otherwise noted the text for the remainder of this section is reported from the publication that includes the original description.
Description
Worker: Monomorphic (?), with hard, thick, smooth integument. Mandibles subtriangular, with distinct and rather long masticatory border bearing a graduated series of about 10 teeth. Palpi short, maxillary pair 4-, labial pair 3-jointed. Head broadly subelliptical, eyes well developed, in front of the middle of its sides; ocelli absent. Clypeus very short laterally, with subobsolete posterior suture, its median portion produced backward triangularly between the frontal carinae, its anterior border with a large, median triangular tooth. Frontal carinae rather closely approximated, feebly lobular in front, straight and subparallel behind; frontal area absent; frontal groove interrupted, subobsolete. Antennae long, 12-jointed; first funicular joint somewhat enlarged, second longer than the third, the tip enlarged, forming an indistinct three- to four- jointed club. Thorax long and narrow, shaped somewhat as in Aphaenogaster, with long and pronounced mesoepinotal impression; promesonotal suture distinct only on the sides, mesoepinotal suture obsolete; pronotum with strong humeral protuberances; mesosternum with a rectangular, laterally projecting tooth near the base of its ventral border; epinotum bearing two long, flattened, hooked spines resembling those of Polyrhachis bamata Drury; epinotal spiracle circular, borne on a distinct crateriform eminence; metasterna swollen, apparently containing voluminous metasternal glands. Petiole long, with well-developed anterior peduncle, its node rather high and bearing a pair of backwardly and outwardly directed spines. Postpetiole short, with rounded-subconical node. Gaster broadly oval, consisting for the most part of the enlarged first segment; sting not exserted, apparently vestigial. Legs long; coxae large and swollen; middle and hind tibiae spurless; tarsal claws simple.
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. 1994. Identification guide to the ant genera of the world. Cambridge, Mass.: Harvard University Press, 222 pp. (page 106, page 90, Ancyridris as genus)
- Bolton, B. 1995b. A new general catalogue of the ants of the world. Cambridge, Mass.: Harvard University Press, 504 pp. (page 63, Ancyridris in Myrmicinae, Stenammini)
- Bolton, B. 2003. Synopsis and Classification of Formicidae. Mem. Am. Entomol. Inst. 71: 370pp (page 202, Ancyridris as genus)
- Brown, W. L., Jr. 1973b. A comparison of the Hylean and Congo-West African rain forest ant faunas. Pp. 161-185 in: Meggers, B. J., Ayensu, E. S., Duckworth, W. D. (eds.) Tropical forest ecosystems in Africa and South America: a comparative review. Wash (page 178, Ancyridris provisional junior synonym of Lordomyrma (unconfirmed))
- Burchill, A.T., Moreau, C.S. 2016. Colony size evolution in ants: macroevolutionary trends. Insectes Sociaux 63, 291–298 (doi:10.1007/s00040-016-0465-3).
- Cantone S. 2017. Winged Ants, The Male, Dichotomous key to genera of winged male ants in the World, Behavioral ecology of mating flight (self-published).
- 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).
- Stitz, H. 1938. Neue Ameisen aus dem indo-malayischen Gebiet. Sitzungsber. Ges. Naturforsch. Freunde Berl. 1938: 99-122.
- Wheeler, W. M. 1935a. Two new genera of myrmicine ants from Papua and the Philippines. Proc. N. Engl. Zool. Club 15: 1-9 (page 1, 5, Ancyridris in Myrmicinae, Pheidolini)