Hypoponera juxta

AntWiki - Where Ant Biologists Share Their Knowledge
Jump to: navigation, search
Hypoponera juxta
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Ponerinae
Tribe: Ponerini
Genus: Hypoponera
Species: H. juxta
Binomial name
Hypoponera juxta
Bolton & Fisher, 2011

Hypoponera juxta is known from a single worker.

Identification

Bolton and Fisher (2011) - Closely related to Hypoponera fatiga (and Hypoponera lassa); the contrast between their fine, superficial, closely packed, short cross-ribs and the long, strong, widely spaced, coarse cross-ribs of juxta, is striking. Also see Hypoponera jocosa.

A member of the abeillei group.

Keys including this Species

Distribution

Distribution based on Regional Taxon Lists

Afrotropical Region: Ethiopia (type locality).

Distribution based on AntMaps

AntMapLegend.png

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.

  • juxta. Hypoponera juxta Bolton & Fisher, 2011: 65 (w.) ETHIOPIA.

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

Description

Worker

Measurements: HL 0.56, HW 0.43, HS 0.495, SL 0.36, PrW 0.31, WL 0.71, HFL 0.34, PeNL 0.14, PeH 0.33, PeNW 0.24, PeS 0.237. Indices: CI 77, SI 84, PeNI 77, LPeI 42, DPeI 171.

Matching the description of fatiga and with indices in the same range, but size slightly larger (compare measurements). H. juxta is immediately distinguished from fatiga by the condition of the cross-ribs at the base of the cinctus of the second gastral tergite. In fatiga (and also in lassa) the cross-ribs are short, fine, delicately constructed and densely packed. In contrast, the cross-ribs of juxta are long and thick, coarse and very conspicuous, and are distinctly separated by broad, longitudinal spaces. In addition, in juxta the anterior and posterior faces of the petiole node in profile are almost parallel, only minutely convergent dorsally, and the maximum width of the first gastral tergite in dorsal view is equal to the width of the second tergite at its midlength (ca 0.38).

Type Material

Holotype worker. Ethiopia: Welega Region, Nekemte, between Nekemte & Gimbi (1350 m.) c/o Kolobo, 26.vii.2002, Museo Zoologico “La Specola”, num. MAG. 2484 (A. Sforzi & L. Bartolozzi) (MSNF).

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