Camponotus vagulus Forel

Wild, A. L., 2007, A catalogue of the ants of Paraguay (Hymenoptera: Formicidae)., Zootaxa 1622, pp. 1-55: 50

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Camponotus vagulus Forel


Camponotus vagulus Forel  HNS  1908b. NEW STATUS.

Camponotus fastigatus subsp. vagulus Forel  HNS  1908b: 403. [w syntypes examined, MHNG; São Paulo, Brazil (v. Ihering)] 

Camponotus (Myrmaphaenus) fastigatus subsp. vagula Forel  HNS  . Emery 1925: 155.

Camponotus (Myrmaphaenus) fastigatus vagulus Forel  HNS  . Kempf 1972: 46.

Camponotus fastigatus  HNS  has been interpreted broadly by Forel, Emery, and Santschi, who each named subspecies based on forms that are distinct from C. fastigatus  HNS  in head shape, mesonotal structure, and pilosity. It is unlikely that any of these subspecies, including Forel’s C. vagulus  HNS  , are truly conspecific as they maintain their differences in broad sympatry in southern South America.

With minor workers approaching only 3mm in length, Camponotus vagulus  HNS  is one of the smallest Camponotus  HNS  in the region. This ant co-occurs with C. fastigatus  HNS  throughout eastern Paraguay and shows similar associations with open or edge habitats. Both ants share a robust build, a strong medial clypeal carina, and short antennal scapes that in repose fall well short of the posterior cephalic margin. However, differences between the two are numerous. In full face view, the head of the major of C. vagulus  HNS  is rectangular, over 1. 1x longer than broad, with sides straight and subparallel, while the head of C. fastigatus  HNS  is rounded, about as long as broad, with the sides clearly convex. The integument of C.vagulus  HNS  over most of the body has little microsculpture, giving the ant a characteristic shiny appearance, while that of C. fastigatus  HNS  is opaque. The pubescence of C. vagulus  HNS  is shorter and more difficult to see than that of C. fastigatus  HNS  , and the head of both worker castes in C. vagulus  HNS  is lighter in color near the mandibular insertions. In light of the numerous differences in sympatry between the forms, the case for raising C. vagulus  HNS  to species is unambiguous.


Switzerland, Geneva, Museum d'Histoire Naturelle