Hypoponera producta

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

Hypoponera producta P casent0226626.jpg

Hypoponera producta D casent0226626.jpg

Specimen Label

Hypoponera producta has been collected from rainforest leaf-litter and rotten wood.

Identification

Bolton and Fisher (2011) - This species is closely related to Hypoponera occidentalis but has the longest scapes of any known Afrotropical species that lacks a developed metanotal groove and has the base of the cinctus of the second gastral tergite without cross-ribs. In occidentalis, SI is always <100. In addition, producta has a slightly longer and narrower head (CI 72–75) and a relatively slightly narrower petiole node (DPeI 135–155); in occidentalis these indices are CI 76–82, DPeI 152– 180 (mean = 165).

Relative dimensions are also the easiest way to distinguish producta from Hypoponera importuna because, apart from the shorter scapes of the latter, it also has a much broader petiole node, with PeNI 88–95 and DPeI 182–195, as opposed to PeNI 73–83 and DPeI 135–155 in producta.

A member of the abeillei group.

Keys including this Species

Distribution

Known from Cameroun and Gabon.

Distribution based on Regional Taxon Lists

Afrotropical Region: Gabon (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

Workers, queens and ergatiod queens have been collected. Males are unknown.

Nomenclature

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

  • producta. Hypoponera producta Bolton & Fisher, 2011: 84, figs. 94-96 (w.,ergatoid q.,q) GABON.

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

The intercaste in the type-series has the eye with about 20 ommatidia and the mesosoma somewhat more stoutly built than in the worker. Its lateral mesosoma has the mesonotal-mesopleural suture better developed than the worker, and a weak transverse suture is present on the mesopleuron, dividing it into anepisternum and katepisternum. The gaster is also larger, with the maximum width of the first tergite 0.58 in the intercaste, as opposed to a maximum width of 0.54 in the holotype (the full queen has 0.61).

Description

Worker

(holotype in parentheses). Measurements: HL 0.72–0.74 (0.73), HW 0.52–0.55 (0.53), HS 0.620–0.650 (0.630), SL 0.54–0.56 (0.54), PrW 0.42–0.46 (0.44), WL 0.96–1.08 (0.96), HFL 0.55–0.59 (0.58), PeNL 0.22–0.25 (0.22), PeH 0.45–0.50 (0.48), PeNW 0.32–0.37 (0.32), PeS 0.333–0.377 (0.340) (8 measured). Indices: CI 72–75 (74), SI 99–108 (102), PeNI 73–83 (73), LPeI 46–53 (46), DPeI 135–155 (145).

Eyes sometimes absent but usually of 1–3 minute ommatidia. Apex of scape, when laid straight back from its insertion, just touches the midpoint of the posterior margin in full-face view; SL/HL 0.74–0.78; the scape relatively long, SI 99 or more. Cephalic dorsum sharply reticulate-punctate. Pronotal dorsum almost smooth, with spaced, minute, superficial punctures, obviously much less strongly and densely sculptured than cephalic dorsum. Metanotal groove absent from dorsum of mesosoma. Mesonotal-mesopleural suture absent to very feebly present on side of mesosoma. Propodeum weakly marginate between declivity and side. Posterior surface of petiole node without short cuticular ridges that radiate upward from the peduncle. Node of petiole tall and relatively thick in profile, with the anterior and posterior faces slightly convergent dorsally and the dorsum weakly convex. Subpetiolar process with a distinct ventral angle. Maximum width of first gastral tergite in dorsal view greater than the width of the second gastral tergite at its midlength. Base of cinctus of second gastral tergite glossy and polished, without trace of cross-ribs. Midline length of second gastral posttergite, from posterior margin of cinctus to apex, is less than the width of the segment at its midlength. Disc of second gastral tergite with sharply incised, small punctures that are widely separated by areas of glossy cuticle; the diameters of the punctures are distinctly less than the distances that separate them. First gastral tergite dorsally pubescent and with a number of short, standing setae that conspicuously project above the level of the pubescence in profile.

Holotype Specimen Labels

Type Material

Holotype worker, Gabon: Prov. Woleu-Ntem, 31.3 km. 108° ESE Minvoul, 2°04.8’N, 12°24.4’E, 600 m., 11.ii.1998, #1684(13)-4, sifted litter (leaf mold, rotten wood), rainforest (B.L. Fisher) (California Academy of Sciences).

Paratypes. 3 workers, 1 worker-queen intercaste, 1 dealate queen, with same data as holotype but coded #1684(10)- 3, #1684(11)-5, #1684(42)-5, #1684(39)-6 (intercaste), #1684(14)-10 (queen); 2 workers with same data as holo-type but 10.ii.1998 and coded #1678-1, #1678-2, ex rotten log, rainforest (CASC, The Natural History Museum).

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