Camponotus longipilis

This ant colonizes stems of live bamboo in Amazonian Guadua and appears to specialize on this nesting habitat. Camponotus longipilis is also believed to be dependent on coccids (Cryptostigma guadua). Kondo and Gullan (2004) and Davidson et al. (2006).

Identification
A member of the subgenus Myrmostenus.

Mackay (1997) - This species has an elongate head (CI 54-56) which is basically rectangularly shaped. It is identical to that of Camponotus postangulatus, except it lacks the occipital angles. The ventral surface of the head is covered with dense, long, erect, twisted hairs. The occipital corners are rounded and not angulate.

This species would not be confused with any other in the longipilis complex, except C. postangulatus. It differs in that the occipital corners are not angulate and the ventral surface of the head is covered with long, coarse, erect hairs. The sculpture is similar to that of C. leptocephalus, but it lacks the abundant hairs on the dorsum of the head, having only a few scattered, coarse, erect hairs. The clypeal carina is also much more differentiated than it is in C. leptocephalus.

Distribution based on Regional Taxon Lists
Neotropical Region: Bolivia, Peru.

Biology
Established colonies grow and occupy multiple culms after workers open entrances in young Guadua stems prior to lignification. After culm walls have lignified, they do not appear to be able to open entryways to unbreached internodes, and both live and dead bamboo specialists apparently depend either on entrances cut by other arthropods, or on cracks and fissures in fractured stems. (Davidson et al. 2006)

Nomenclature

 *  longipilis. Camponotus longipilis Emery, 1911a: 224 (q.) PERU. Combination in C. (Myrmamblys): Forel, 1914a: 271; in C. (Myrmostenus): Emery, 1920b: 260. See also: Mackay, 1997: 200.

Queen
Mackay (1997) - HL 3.44-3.58, HW 1.88-1.94, SL 2.68-2.88, EL 0.73-0.79, clypeal length 1.23-1.32, clypeal width 0.91-1.02. Indices: SI 78-84, CI 54-56, clypeal index 74-77.

Mandible with 6 teeth; clypeus longer than broad, widened anteriorly, surface strongly convex with well-defined carina; clypeal border strongly concave; scape extending past posterior border of head; vertex weakly convex; maxillary palps short and delicate, extending about half distance to foramen magnum; labial palps also slender and about ½ length of maxillary palps; descending face of propodeum somewhat more than 1/2 length of basal face; petiole with strongly convex anterior face, straight posterior face.

Hairs erect, sparse, long and coarse on head (including underside of head), scattered on mesosoma and scattered on gaster; decumbent pubescence very fine and sparse on mesosoma and gaster. Head weakly, but densely punctate, mesosoma and gaster coriaceous, but strongly shining.

Color medium brown, head, mandibles and scape darker brown.

Type Material
Mackay (1997) - Lectotype queen (here designated), Pachita, Peru, Stdg; longipilis Emery  [seen]; second female mentioned by Emery (1911) not seen.