Bothroponera berthoudi

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Bothroponera berthoudi
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Ponerinae
Tribe: Ponerini
Genus: Bothroponera
Species group: pumicosa
Species: B. berthoudi
Binomial name
Bothroponera berthoudi
Forel, 1901

Bothroponera berthoudi hal.jpg

Bothroponera berthoudi had.jpg

Specimen Label

Specimens have been collected in open habitats, e.g., savanna, thornveld and farmland.

Identification

Joma and Mackay (2015) - A member of the Bothroponera pumicosa species complex. The worker of Bothroponera berthoudi is a relatively large ant (total length 9.60 – 12.00 mm). The mandibles are hairy and coarsely covered with punctures. The anterior medial margin of the clypeus is “u” shaped and slightly bent ventrally, with the disc has a raised smooth area with striae. The upper part of the raised area, between the frontal lobes is rough with a few punctulae, and with a small clypeal carinae. The clypeal wings are punctulate and obliquely striate. The scape barely reaches the posterior lateral corner of the head.

Arnold (1952) considered B. berthoudi to be a race of Bothroponera pumicosa, but it is clear that this species is different from B. pumicosa in that B. pumicosa has long hairs that cover the entire body, which is not the case in B. berthoudi. There are other slight differences between the two species. The anterior medial raised area of the clypeus of B. pumicosa forms a partial carina on the posterior part and a smooth narrowed area on the grooved anterior part. The same character is found in B. berthoudi, but the upper part forms striae instead of a partial carina, the lower part is smooth but wider than that of B. pumicosa. The mandibles have 7 teeth in B. berthoudi, similar to the other B. pumicosa species complex members, whereas B. pumicosa has 8 teeth.

Bothroponera laevissima has the same “u” shaped clypeus as does B. berthoudi, but is easily recognized by the unique sculpture: shiny with scattered punctures. The mandibles have 7 teeth in B. berthoudi and B. laevissima, similar to the other B. pumicosa species complex members.

The body surface of B. berthoudi is densely foveolate, and the fourth abdominal segment is densely covered with foveolae and striae. Basically, the members of the type series consistently differ from the rest of B. pumicosa species complex species in having long erect hairs on most surfaces (except the head) and in lacking a well-defined medial clypeal carina

Bothroponera cariosa and Bothroponera strigulosa have the same “u” shaped lower medial anterior margin of the clypeus, but this area forms a sharp clypeal carinae in both species, which is lacking in B. berthoudi.

Keys including this Species

Distribution

Distribution based on Regional Taxon Lists

Afrotropical Region: South Africa (type locality).

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Biology

Castes

Nomenclature

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

  • berthoudi. Pachycondyla (Bothroponera) berthoudi Forel, 1901f: 344 (w.) SOUTH AFRICA. Forel, 1913b: 306 (m.). Subspecies of pumicosa: Forel, 1913a: 109. Junior synonym of strigulosa: Arnold, 1952a: 460. Status as species: Joma and Mackay, 2013: 3; Jomo & Mackay, 2015: 545. Senior synonym of variolosa: Joma and Mackay, 2015: 545.
  • variolosa. Bothroponera variolosa Arnold, 1947: 131, fig. 1 (w.) SOUTH AFRICA. Combination in Pachycondyla: Brown, in Bolton, 1995b: 311; in Bothroponera: Joma & Mackay, 2013: 3; Schmidt & Shattuck, 2014: 77. Junior synonym of berthoudi: Joma and Mackay, 2015: 545.

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

Joma and Mackay (2015) - The specific epithet “berthoudi” was first used by Forel (1890) as a name for Ophthalmopone berthoudi from South Africa. Later, he used it again to identify and describe the male of Ophthalmopone berthoudi. Wheeler and Wheeler (1971) used the same name to identify larvae of O. berthoudi. In 1901 Forel used the same specific epithet to describe Pachycondyla (Bothroponera) berthoudi. Pachycondyla (Bothroponera) berthoudi has been considered to be a secondary homonym of Pachycondyla (Ophthalmopone) berthoudi, as they were both placed in the same genus (Bolton, 1995), which has caused considerable confusion. In this project, we clearly distinguish between O. berthoudi and B. berthoudi as these now belong to two different genera (Schmidt & Shattuck, 2014).

Description

Worker

Joma and Mackay (2015) - (n=8), HL 2.00 - 2.61, HW 1.75 - 2.25, ML 1.15 - 1.45, EW 0.30 - 0.35, EL 0.30 - 0.45, SL 1.40 - 1.85, FL 2.10 - 2.60, WL 2.75 - 3.85, WPL 3.60 - 4.90, PL 0.90 - 1.30, PW 0.95 - 1.35, PH 1.30 - 1.60, CI 86.20 - 87.50, OI 17.14 - 20.00, MandI 57.50 - 55.56, SI 80.00 - 82.22, PetI 103.84 - 105.56. Mandibles smooth with about 7 teeth; head subquadrate; maximum transversal clypeal length 1.60 mm; compound eyes relatively large; length of malar space 0.40 mm; length from upper edge of eye to edge of posterior lobe 1.00 mm; maximum frontal lobes width 0.75 mm; surface of head, pronotum, mesonotum, mesopleuron, propodeum, lateropropodeum, metapleuron, densely foveolate, moderately shiny; petiolar and postpetiolar surfaces densely covered with larger foveolae than those of mesosoma, moderately shiny; cheek, sides of head, area posterior to eyes, frons covered with weakly defined striae; dorsum of fourth abdominal segment covered with shallow foveolae and striae; fifth-seventh abdominal segments smooth, shiny; basalar sclerite oval in depressed surrounding area; pronotal shoulder rounded, lower margin straight (lateral view), anteroinferior pronotal process angled, inferior pronotal process rounded; mesometapleural suture developed; mesopleural-coxal excavation developed and continued with mesometapleural suture; antennae, legs, lower edges of frontal lobes, mandibles shiny; anterior face of petiolar node from dorsal view rounded, slightly narrowed anteriorly, posterior face vertical in side view, slightly concave with slight depression on medial upper margin; metapleuron rough, covered with striae, foveolae; posteropropodeum rough, slightly concave; dorsum of postpetiole densely covered with large foveolae and striae; surface of 4th abdominal segment rough, covered with large foveolae; 5th to 7th abdominal segments moderately shiny, covered with fine striae; head, dorsum of pronotum, mesonotum, propodeum covered with fine moderately long golden erect hairs; hairs moderately long (0.12 mm up to 0.25 mm) hairs on mandibles, legs, scapes; length of hairs on pronotum, mesonotum, propodeum slightly longer (0.20 - 0.25 mm); dorsum of petiole, dorsal and ventral surfaces of postpetiole, and 4th to 7th abdominal segments covered with longer erect golden hairs (0.30 - 0.35 mm); head, pronotum, mesonotum, mesopleuron, propodeum, petiole, postpetiole, entire gaster black; legs and antennae brownish black; mandibles reddish brown.

References