Neoponera goeldii

This species exhibits a high degree of flexibility in where and how it constructs its nests.

Identification
From Mackay and Mackay (2010): The shape of the petiole of the worker of P. goeldii would separate it from most of the others in the crenata species complex (anterior and posterior faces are convex with the highest point near the middle of the apex). Only four species have a petiole with a similar shape: Pachycondyla cavinodis, Pachycondyla donosoi, Pachycondyla oberthueri and Pachycondyla carinulata. Pachycondyla cavinodis and P. oberthueri are easily separated from P. goeldii as the highest point is closer to the posterior end the dorsum of the petiole and the posterior face of the petiole is weakly to strongly concave. The anterior face of the petiole of P. goeldii forms a continuously sloping curve and is not angulate about half way up the node as it is P. carinulata.

The workers of P. goeldii are similar to those of P. donosoi. They can be separated on the basis of three well-defined characters: the dorsal surfaces of the mandibles of P. goeldii are completely striate, whereas they are mostly smooth and glossy in P. donosoi. The subpetiolar process is strongly concave in P. goeldii, not weakly concave as in P. donosoi and the tibiae of P. goeldii have abundant erect hairs that are at least as long as the diameter tibia, often twice or more as long as compared with the sparse hairs in P. donosoi in which the hairs are approximately as long as the diameter of the tibiae. The female of P. goeldii could be easily confused with that of Pachycondyla unidentata, but the long hairs on the middle and posterior tibiae (most longer than the diameter of the tibiae) would separate it from P. unidentata, in which the length of these hairs is approximately equal to the diameter of the tibiae.

It would not be possible to confuse males of P. goeldii with those of P. donosoi. The males of P. goeldii are very distinct in that they are about as large as the workers, not approximately ½ the size the workers as in P. donosoi. The subpetiolar process is strongly concave in P. goeldii, but barely can be described as concave in males of P. donosoi.

Santschi (1920) states that Neoponera lydiae differs from P. goeldii in lacking the dorsal face of the petiole. Comparison of females associated with workers of P. goeldii, with the lectotype of N. lydiae, shows them to be identical. Both forms have the extremely long erect hairs on the scapes and tibiae.

Distribution
ECUADOR, GUYANA, FRENCH GUIANA, SURINAME, PERU, TRINIDAD, BRASIL (Mackay and Mackay 2010)

Distribution based on Regional Taxon Lists
Neotropical Region: Brazil, French Guiana.

Pachycondyla goeldii is found in a number of habitats ranging from caatinga [scrub vegetation], riparian rain forest, wet forest, second growth rain forest, a clearing in second growth rain forest and in an urban habitat (garden), at elevations ranging from 250 - 770 m. Nests are located in open sunny areas (Belin-Depoux, 1991). (Mackay and Mackay 2010)

Biology
From Mackay and Mackay (2010): Nests are usually found in hollow twigs or branches (1 - 7 cm in diameter), often those found on the forest floor. It also constructs carton nests (Corbara and Dejean, 1996; Orivel, et al., 1998). The nest described by Weber (1944) in Trinidad is probably that of P. goeldii. The specimens from near Oropuche Cave were on a pomerac [Syzygium] tree at a roadside. Brood and a male were collected in a nest in July (Ecuador). Alate females were collected in May (Ecuador and Suriname); alate males were collected in October and November (Perú). Dealate females were collected in April (French Guiana), June (Trinidad) and July (Perú). Workers are extremely fast and difficult to capture.

The specimens from near Manaus were in an epiphyte (Anthurium cf. gracile [Araceae]). The ants integrate epiphyte seeds in their nests (Aechmea mertensii [Bromeliaceae], Clusia sp. [Clusiaceae], Codonanthe calcarata [Gesneriaceae], Peperomia macrostachya [Piperaceae] and Anthurium gracile [Araceae]), which germinate, develop and reinforce the nest (Orivel et al., 1998).

Caterpillars of Vettius tertianus (Hesperiidae) live in the nests in the bromeliad Aechmea mertensii. Pachycondyla goeldii nests together with the ponerine ant Odontomachus mayi (Corbara et al., 1999).

Nomenclature

 *  goeldii. Neoponera goeldii Forel, 1912c: 36 (w.) BRAZIL. Mackay & Mackay, 2010: 363 (m.). Combination in Pachycondyla: Brown, in Bolton, 1995b: 305. Senior synonym of lydiae: Mackay & Mackay, 2010: 362.
 * lydiae. Neoponera lydiae Santschi, 1920d: 361 (q.) FRENCH GUIANA. Combination in Pachycondyla: Brown, in Bolton, 1995b: 307. Junior synonym of goeldii: Mackay & Mackay, 2010: 362.

Worker
From Mackay and Mackay (2010): The worker is a moderate sized (total length 7 - 8 millimeters) yellowish brown to brown ant. The mandibles are moderately elongated and have about 13 teeth. The anterior medial border of the clypeus is angulate. The sides of the head are nearly parallel but noticeably narrowed anterior to the eyes. The eyes are relatively large, occupying about ⅓ of the side of the head. The malar carina is well developed and extends to the anterior margin of the eye. The scape is long and extends about three funicular segments past the posterior lateral corner of the head. The posterior margin is nearly straight. The pronotal shoulder is formed into a sharp carina which slightly overhangs the side of the propodeum. The metanotal suture is barely marked on the dorsum of the mesosoma and is only slightly depressed below the outline. The propodeal spiracle is elongated. Both the anterior and posterior faces of the petiole are convex (at least the upper half of the anterior face) and meet at the highest point in the middle of the apex. The subpetiolar process is poorly developed. The anterior face of the postpetiole is slightly concave and meets the broadly rounded dorsal face at slightly more than a 90 degree angle. The metasternal process consists of two closely spaced lobes with the surface between them crenulated.

Erect hairs are abundant and long on most surfaces, including the mandibles, the clypeus (up to 0.6 mm), on the scapes (0.3 mm, length > diameter of scape), dorsum of the mesosoma (up to 0.5 mm), petiole and gaster, the hairs on the legs are long, especially those on the middle and posterior tibiae (up to 0.4 mm), most longer than the diameter of the tibiae; appressed silver hairs are scattered on most surfaces and moderately dense on the dorsum of the gaster.

The mandibles are finely striate and dull, the clypeus is depressed medially with poorly developed striate on both sides of the depression. The head, mesosoma, petiole and gaster are covered with poorly defined punctures and moderately smooth and glossy.

Queen
From Mackay and Mackay (2010): The female (Neoponera lydiae) is similar in most aspects, including the presence of long hairs, mostly longer than the diameter of the appendages, differing from the worker only significantly in the shape of the petiole, in which the anterior face of the petiole is nearly straight and the posterior face is broadly rounded and meets near the anterior edge of the apex.

The pronotum has a sharp carina on the shoulder and the propodeal spiracle is slit-shaped.

The pilosity and sculpture are similar to that of the worker.

Male
From Mackay and Mackay (2010): The male (undescribed) is a small (total length 6 mm) dark brown specimen with yellowish brown appendages, clypeus and genitalia. The head length is 0.96 mm; head width 0.79 mm. The eye is large (maximum diameter 0.60 mm) located less then ½ diameter from the lateral ocellus. The median ocellus (0.13 mm) is located approximately one diameter from the lateral ocellus (0.14 mm). The pronotal shoulder is only slightly swollen; the Mayrian furrows are well developed on the scutum, as are the parapsidal sutures. The scutellum is only weakly convex. The propodeal spiracle is slit-shaped. The petiole is triangular-shaped with the anterior and posterior faces being very similar shaped. The subpetiolar process consists of a rounded anterior lobe followed by a concave region and a small angle. The anterior face of the postpetiole is broadly rounded; the subpostpetiolar process is poorly developed. The specimen is a callow and the wing venation is difficult to see. The genitalia were not dissected on the single available specimen.

Erect hairs are sparse and range from 0.1 - 0.2 mm in length. These hairs are present on the clypeus, dorsal and ventral surfaces of the head, posterior margin of the head, mesosoma, petiole and subpetiolar process and all surfaces of the gaster. The legs, including the tibiae, have similar erect and suberect hairs. Erect hairs on the tibiae are approximately as long as the diameter of the tibiae.

The head is finely sculptured and moderately shining, the sculpture on the mesosoma is similar and most surfaces are shining and nearly smooth and glossy (the mesopleuron), the side of the propodeum has poorly defined rugae. The petiole has a single longitudinal ruga; the gaster is mostly smooth and shining.

Type Material
1 lectotype, 1 paralectotype here designated, ; holotype seen, (Mackay and Mackay 2010)

Type Locality Information
Brasil: Amazonas: Vitória; French Guiana: Nouveaux Chantiers (Mackay and Mackay 2010)

Etymology
This species was named in honor of Mr. Göldi who collected the type series. (Mackay and Mackay 2010)

Additional References

 * Belin-Depoux, M. 1991. Écologie évolutive des jardins de fourmis en Guyane française. Rev. Ecol. Terre Vie 46:1-38.


 * Corbara, B. and A. Dejean. 1996. Arboreal nest building and ant garden initiation in a ponerine ant. Naturwissenschaften 83:227-230.


 * Corbara, B., A. Dejean and J. Orivel. 1999. Ant gardens, a unique epiphyte-ant association. L’Année Biologique 38:73-89.


 * Forel, A. 1912. Formicides Néotropiques. Part 1. Annales de la Société Entomologique de Belgique 56:28-49.




 * Orivel, J., A. Dejean and C. Errard. 1998. Active role of two ponerine ants in the elaboration of ant gardens. Biotropica 30:487-491.


 * Santschi, F. 1920. Formicides africains et américains nouveaux. Annales de la Société Entomologique de France 88:361-390.


 * Weber, N. A. 1944. The tree ants (Dendromyrmex) of South and Central America). Ecology 25:117-120