Xymmer muticus

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Xymmer muticus
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Amblyoponinae
Genus: Xymmer
Species: X. muticus
Binomial name
Xymmer muticus
(Santschi, 1914)

Amblyopone mutica casent0006827 profile 1.jpg

Amblyopone mutica casent0006827 dorsal 1.jpg

Specimen labels

Known from sampling of litter and soil in rainforest and savannah habitats. Little else is know about the biology of this species.

Identification

The worker mandibles, shape of the head and general body form are most similar to Amblyopone, Prionopelta and Stigmatomma.

Distribution

Distribution based on Regional Taxon Lists

Afrotropical Region: Cameroun, Central African Republic, Ghana, Ivory Coast, Nigeria (type locality).

Distribution based on AntMaps

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Distribution based on AntWeb specimens

Check data from AntWeb

Biology

Castes

Worker

Nomenclature

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

  • muticus. Stigmatomma (Xymmer) muticum Santschi, 1914d: 311, fig. 2 (w.) NIGERIA. Combination in Xymmer: Wheeler, W.M. 1922a: 758; in Amblyopone: Brown, 1960a: 168; in Xymmer: Yoshimura & Fisher, 2012: 19.

Description

Worker

Yoshimura & Fisher (2012) - TL 3.5 mm, including mandibles. Colour brownish-red; mandibles, antennae and legs more yellowish. Shiny; smooth with very fine but quite dense puncturation. Hairs limited to a very few around the mouth and gastral apex. Pubescence all over quite abundant but not concealing the sculpturation. Head a fifth longer than wide, a quarter more narrow behind than in front; sides slightly arcuate, near straight and posterior border distinctly concave. Blind, sometimes a rudimentary facet at the posterior third. Frontal carinae set well apart; clypeus rectangular four times wider than long. Frontal notch very narrow. Scape reaching the posterior quarter of the head. All funiculus segments wider than long. Mandibles shiny, densely punctate, narrow, length about three-quarters that of the head; external border near straight in basal four-fifths before the strongly convex apical fifth. Internal border slightly convex and with eight teeth strong and simple (rarely bifurcate) with the space between second and third bigger than between others. Thorax dorsum flat and sub-bordered. Pronotum a quarter longer than wide. Mesonotum and propodeum fused, about three times longer than wide, with almost straight sides. Propodeum dorsum more distinctly bordered behind, passing into the declivity with a sharp curve. Declivity, straight from one side to the other, convex from above to bottom in the lower third, concave basally. Petiole node a third longer than wide, sides somewhat convex, higher in front than behind. Without ventral process but with a very low simple tubercle. First segment of gaster shorter than petiole, high than long and as long as the posterior width. This species is characterized by the clypeus having no armament and being lobed.

Type Material

Yoshimura & Fisher (2012) - Lectotype worker from Nigerie S. lbadan, Nigeria, Silvestri. Det. Santchi 1913 (Naturhistorisches Museum, Basel): CASENT0217322.

References

  • Bolton, B. 1995b. A new general catalogue of the ants of the world. Cambridge, Mass.: Harvard University Press, 504 pp. (page 62, catalogue)
  • Brown, W. L., Jr. 1960a. Contributions toward a reclassification of the Formicidae. III. Tribe Amblyoponini (Hymenoptera). Bull. Mus. Comp. Zool. 122: 143-230 (page 168, Combination in Amblyopone)
  • Santschi, F. 1914d. Formicides de l'Afrique occidentale et australe du voyage de Mr. le Professeur F. Silvestri. Boll. Lab. Zool. Gen. Agrar. R. Sc. Super. Agric. 8: 309-385 (page 311, fig. 2 worker described)
  • Wheeler, W. M. 1922j. Ants of the American Museum Congo expedition. A contribution to the myrmecology of Africa. VIII. A synonymic list of the ants of the Ethiopian region. Bull. Am. Mus. Nat. Hist. 45: 711-1004 (page 758, Combination in Xymmer)
  • Yoshimura, M. & Fisher, B.L. 2012. A revision of male ants of the Malagasy Amblyoponinae (Hymenoptera: Formicidae) with resurrections of the genera Stigmatomma and Xymmer. PLoS ONE 7(3):e33325 doi:10.1371/journal.pone.0033325