Hypoponera mixta

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Hypoponera mixta
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Ponerinae
Tribe: Ponerini
Genus: Hypoponera
Species: H. mixta
Binomial name
Hypoponera mixta
Bolton & Fisher, 2011

Hypoponera mixta P casent0226552.jpg

Hypoponera mixta D casent0226552.jpg

Specimen Label

Nothing is known about the biology of Hypoponera mixta.

Identification

Bolton and Fisher (2011) - Closely related to Hypoponera jeanneli but larger and has the first gastral tergite broader in relation to the second.

A member of the abeillei group.

Keys including this Species

Distribution

Distribution based on Regional Taxon Lists

Afrotropical Region: Kenya (type locality).

Distribution based on AntMaps

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Distribution based on AntWeb specimens

Check data from AntWeb

Biology

Hypoponera inhabit and nest in leaf litter, the surface layer of soil, downed rotten wood, and soil around plant roots. Nests are typically found by turning objects on the ground, like downed wood and rocks, or through the ripping away of bark found on rotting downed wood or at the base of dead trees. Litter samples in tropical areas, especially in moist forested sites, often contain individuals of this genus. All Hypoponera are thought to be predators of small arthropods but published details about their diet are sparse. A lack of information about other aspects of their biology is also typical for most species.

The genus is most diverse in the tropics. Species found in higher latitudes tend to be more widespread, common and abundant than their tropical and subtropical congeners.

Castes

Nomenclature

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

  • mixta. Hypoponera mixta Bolton & Fisher, 2011: 72, figs. 76-78 (w.) KENYA.

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

Description

Worker

(holotype in parentheses). Measurements: HL 0.68–0.74 (0.70), HW 0.56–0.60 (0.58), HS 0.620–0.665 (0.640), SL 0.50–0.54 (0.51), PrW 0.45–0.48 (0.47), WL 0.94–1.00 (0.96), HFL 0.52–0.54 (0.52), PeNL 0.20–0.22 (0.20), PeH 0.43–0.46 (0.45), PeNW 0.31–0.34 (0.32), PeS 0.313–0.333 (0.323) (12 measured). Indices: CI 78–83 (83), SI 87–93 (88), PeNI 68–72 (68), LPeI 43–49 (44), DPeI 145–170 (160).

Eyes absent. Apex of scape, when laid straight back from its insertion, fractionally fails to reach or just touches the midpoint of the posterior margin in full-face view; SL/HL 0.71–0.75. Cephalic dorsum finely reticulate-punctate. Pronotal dorsum almost smooth, obviously much less strongly and densely sculptured than cephalic dorsum. Metanotal groove absent from dorsum of mesosoma, though there may be a slight change of slope between mesonotum and propodeum. Mesonotal-mesopleural suture vestigial or absent from side of mesosoma. Propodeum weakly marginate between declivity and side. Posterior surface of petiole node with a series of very short cuticular ridges that radiate upward from the peduncle. Node of petiole in profile with the anterior and posterior faces weakly convergent dorsally, the dorsum shallowly convex. Petiole node in dorsal view with posterior face transverse and anterior face broadly convex, not thickly D-shaped. Subpetiolar process rounded or with a blunt ventral angle. Maximum width of first gastral tergite in dorsal view slightly greater than width of second gastral tergite at its midlength. Cross-ribs at base of cinctus of second gastral tergite short but conspicuous. Midline length of second gastral posttergite, from posterior margin of cinctus to apex, is slightly less than the width of the segment at its midlength. Disc of second gastral tergite with sharply incised small punctures that are relatively closely packed and separated by areas of glossy cuticle; the diameters of the punctures are equal to or slightly greater than the distances that separate the punctures. First gastral tergite in profile densely pubescent dorsally and with very few short setae that project above the level of the pubescence; the setae inconspicuous and not strongly differentiated from the pubescence.

Paratype Specimen Labels

Type Material

Holotype worker (top specimen of three on pin), Kenya: Nyandarua, 10 km. SE Njabini, nr For. Sta., 2550 m., 9.xi.1977 (V. Mahnert & J.-L. Perret) (Musee d'Histoire Naturelle Genève).

Paratypes. 8 workers with same data as holotype; 12 workers Kenya: Embu, Irangi For. Sta., 2000 m., 11.x.1977 (V. Mahnert & J.-L. Perret) (MHNG, The Natural History Museum, California Academy of Sciences).

References

  • Bolton, B. & Fisher, B.L. 2011. Taxonomy of Afrotropical and West Palaearctic ants of the ponerine genus Hypoponera Santschi. Zootaxa 2843: 1-118. PDF