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Bajcaridris
| Bajcaridris | |
|---|---|
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| Bajcaridris theryi | |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Class: | Insecta |
| Order: | Hymenoptera |
| Family: | Formicidae |
| Subfamily: | Formicinae |
| Tribe: | Formicini |
| Genus: | Bajcaridris Agosti, 1994 |
| Type species | |
| Formica (Proformica) theryi, now Bajcaridris theryi | |
| Diversity | |
| 3 species (Species Checklist, Species by Country)
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Agosti (1994) - Bajcaridris includes the three species Bajcaridris kraussii, Bajcaridris menozzii and Bajcaridris theryi. With the exception of theryi, which has recently been rediscovered (Espadaler & Cagniant, 1987), all the three species have rarely been collected since they were described (kraussii: Forel, 1895, 1902, Emery, 1899; menozzii: Santschi, 1923; theryi: Santschi, 1936). Their habitats are either in the oueds of the northern Sahara in Algeria (kraussii and menozzii) or in the meadows of the mountains of the Atlas in Morocco, where they are among the dominant ant species, building nests in the earth either below stones or with a distinct crater-shaped nest entrance (Espadaler & Cagniant, 1987).
Identification
Agosti (1994) - The workers differ by the combination of the following three characters from all the other ants of the tribe: dentition of the mandible with a small third tooth, clavate hairs and the first funicular segment which is longer than the two subsequent. The males are unique in the following combination of characters: the same size as the workers, a compressed head with distinct, large ocelli forming a socket, a unique subgenital plate with an unpaired median, caudal process, and a long pointed sagitta.
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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 | 0 | 0 | 0 | 0 | 0 | 3 |
| Total Species | 2841 | 1736 | 3045 | 932 | 835 | 4379 | 1741 | 2862 |
Biology
Life History Traits
- Mean colony size: ? (Greer et al., 2021)
- Compound colony type: not parasitic (Greer et al., 2021)
- Nest site: hypogaeic (Greer et al., 2021)
- Diet class: ? (Greer et al., 2021)
- Foraging stratum: ? (Greer et al., 2021)
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: absent • Palp formula: 6,4 • Spur formula: 1 simple, 1 simple • Eyes: >100 ommatidia • Scrobes: absent • Pronotal Spines: absent • Mesonotal Spines: absent • Propodeal Spines: absent • Petiolar Spines: absent • Caste: none or weak • Sting: absent • Metaplural Gland: present • Cocoon: present
Phylogeny
| Formicinae |
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See Phylogeny of Formicinae for details.
Nomenclature
The following information is derived from Barry Bolton's Online Catalogue of the Ants of the World.
- BAJCARIDRIS [Formicinae: Formicini]
- Bajcaridris Agosti, 1994a: 99. Type-species: Formica (Proformica) theryi, by original designation.
- [Bajcaridris Agosti, 1991: 295. Nomen nudum.]
Description
Based on Agosti (1994):
Worker
Formicini ants with the following combination of characters:
- Small (TL <1.4mm), shining ants.
- Mandible with 5 teeth, declining in size from apical to basal with the exception of the third tooth, which is distinctly smaller than the subsequent and the precedent.
- First funiculus segment longer than the two subsequent together.
- Frontal carina reduced to a bulge.
- Propodeal spiracle minute, ellipsoid.
Queen
Inferred ergatogyne, because X. Espadaler and H. Cagniant did not find a queen in nests they dug out (Espadaler & Cagniant, 1987).
Male
Formicini ants with the following modifications:
- Small males, of the same size as workers (TL < 1.4 mm), shining.
- Head compressed with a turban-like ocellar socket.
- Mandible short, subparallel.
- Terminal branches of the wing venation reduced.
- Subgenital plate with a median apical, truncated appendix with two apical claws.
- Stipes without median appendices.
- Volsella rotated about 90° caudally; digitus horizontal, the tip of the cuspis in situ as long as the stipes, dorsoventrally oriented.
- Sagitta with a ventrally elongated apex, in situ as long as stipes; ventral side with few distinct teeth, the lateral plate of the two-folded sagitta protruding almost as far as the median plate with the teeth.
- Few scattered long, erect hairs all over the body.
- Dense pilosity on the dorsal surface of the wings.
References
- Agosti, D. 1991. Revision of the oriental ant genus Cladomyrma, with an outline of the higher classification of the Formicinae (Hymenoptera: Formicidae). Syst. Entomol. 16: 293-310 (page 295, nomen nudum)
- Agosti, D. 1994b. The phylogeny of the ant tribe Formicini (Hymenoptera: Formicidae) with the description of a new genus. Syst. Entomol. 19: 93-117. (page 99, Bajcaridris in Formicinae; page 93, Bajcaridris in Formicinae, Formicini)
- Bolton, B. 1994. Identification guide to the ant genera of the world. Cambridge, Mass.: Harvard University Press, 222 pp. (page 50, Bajcaridris in Formicinae, Formicini)
- Bolton, B. 1995b. A new general catalogue of the ants of the world. Cambridge, Mass.: Harvard University Press, 504 pp. (page 80, Bajcaridris in Formicinae, Formicini)
- Bolton, B. 2003. Synopsis and Classification of Formicidae. Mem. Am. Entomol. Inst. 71: 370pp (page 126, Bajcaridris in Formicinae, F*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).
- Greer, J. A., Moreau, C. S. 2021. Phylogenetic analysis and trait evolution of ant cocoons. Insect Systematics & Evolution 53(1), 60–77 (doi:10.1163/1876312x-bja10008).
- Tinaut, A., Ruano, F. 2021. Biogeography of Iberian ants (Hymenoptera: Formicidae). Diversity 13, 88. (doi:10.3390/d13020088).
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