Bajcaridris

AntWiki - Where Ant Biologists Share Their Knowledge
Jump to: navigation, search
Bajcaridris
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)

Bajcaridris theryi casent0101950 profile 1.jpg

Bajcaridris theryi

Bajcaridris theryi casent0101950 dorsal 1.jpg

Specimen Label

Evolutionary Relationships
Formicinae

Myrmelachistini
  (2 genera)




Lasiini
  (9 genera)




Melophorini
  (9 genera)




Formicini


Polyergus
  (15 species)




Formica
  (278 species)



Iberoformica
  (2 species)






Bajcaridris
  (3 species)




Proformica
  (28 species)




Cataglyphis
  (109 species)



Rossomyrmex
  (4 species)










Gesomyrmex, Oecophylla



Plagiolepidini
  (10 genera)





Gigantiops, Myrmoteras, Santschiella



Camponotini
  (8 genera)








Based on Ward et al. 2016.

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.

Distribution

World distribution based on political regions. View/Edit Data
Bajcaridris Distribution.png Worlddistribution legend.jpg

Species richness

Species richness by country based on regional taxon lists (countries with darker colours are more species-rich). View Data

Bajcaridris Species Richness.png

Biology

Castes

Morphology

Worker Morphology

 • Antennal segment count 12 • Antennal club absent • Palp formula 6,4 • Spur formula 1 simple, 1 simple • Eyes present • Scrobes absent • Sting absent

Nomenclature

The following information is derived from Barry Bolton's New General Catalogue, a catalogue of the world's ants.

  • BAJCARIDRIS [Formicinae: Formicini]
    • Bajcaridris Agosti, 1994a: 99. Type-species: Formica (Proformica) theryi, by original designation.
    • [Bajcaridris Agosti, 1991: 295. Nomen nudum.]

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

Agosti (1994):

Worker

Formicini ants with the following combination of characters:

1 Small (TL <1.4mm), shining ants.

2 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.

3 First funiculus segment longer than the two subsequent together.

4 Frontal carina reduced to a bulge.

5 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: 6 Small males, of the same size as workers (TL < 1.4 mm), shining.

7 Head compressed with a turban-like ocellar socket.

8 Mandible short, subparallel.

9 Terminal branches of the wing venation reduced.

10 Subgenital plate with a median apical, truncated appendix with two apical claws.

11 Stipes without median appendices.

12 Volsella rotated about 90° caudally; digitus horizontal, the tip of the cuspis in situ as long as the stipes, dorsoventrally oriented.

13 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.

14 Few scattered long, erect hairs all over the body.

15 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 PDF (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, Formicini)