Strumigenys kapryx

Known from wet forest and rainforest litter-samples.

Identification
Bolton (2000) - A member of the ebbae complex in the Strumigenys koningsbergeri-group. The non-paratypic material shows some variation. The mandible lamella is always present but is variable in width; preocular impression in ventrolateral margin of head varies from almost absent to quite distinct; sculpture of the metapleuron and side of propodeum may be superficial or faint, in some these areas may appear mostly smooth; erect hairs on the first gastral tergite are decidedly more expanded at their apices in some samples than in others. There is insufficient material available to decide if these variations have significance at species rank, so for the present all are retained under kapryx.

Of the species in the complex that possess a strongly developed lamella on the mandible only kapryx has it straight-edged throughout its length. The species lacks sinuate outer margins to the mandibles and has its preapical mandibular tooth relatively small.

Distribution based on Regional Taxon Lists
Indo-Australian Region: Borneo, Indonesia, Malaysia.

Nomenclature

 *  kapryx. Strumigenys kapryx Bolton, 2000: 846, fig. 453 (w.) BORNEO.

Worker
Holotype. TL 2.3, HL 0.69, HW 0.54, CI 78, ML 0.26, MI 38, SL 0.34, SI 63, PW 0.30, AL 0.66. With characters of ebbae-complex. Preapical tooth short-conical and weakly recurved, close to the apicodorsal tooth, its length about half or somewhat less of width of mandible at point where it arises. Inner margin of mandible with a prominent straight-edged lamella. Lamella narrow near base of mandible, increasing in width distally and terminating just proximal of the preapical tooth; broadest point of lamella just proximal of its apex. Outer margin of mandible straight to very shallowly convex from base to level of preapical tooth. Upper scrobe margins evenly divergent and almost straight from frontal lobes posteriorly; only extreme tip of eye visible in full-face view or eye not visible. Dorsum of head in profile with short erect hairs along occipital margin, 1-2 on dorsum of occipital lobe and a single pair at highest point of vertex; without erect hairs anterior to this. Pronotum with a single pair of short standing hairs, close to anterodorsal margin. Mesonotum with a single pair of short erect hairs. Katepisternum partially to mostly smooth, metapleuron and side of propodeum reticulate to finely reticulate-punctate. Bullae of femoral glands small and inconspicuous on middle and hind legs. Lamella on propodeal declivity well developed, its posterior (free) margin shallowly convex at least in its lower half. Dorsum of petiole node reticulate-punctate, much more densely sculptured than smooth disc of postpetiole. Standing hairs on first gastral tergite simple or very slightly flattened and expanded apically.

Paratypes. TL 2.3-2.4, HL 0.66-0.72, HW 0.51-0.55, CI 76-78, ML 0.25-0.29, MI 38-40, SL 0.32-0.36, SI 62-65, PW 0.28-0.31, AL 0.60-0.70 (5 measured).

Dimensions of non-paratypic workers. HL 0.68-0.72, HW 0.53-0.57, CI 75-82, ML 0.27-0.30, MI 39-43, SL 0.34-0.37, SI 62-68 (7 measured).

Type Material
Holotype worker, Malaysia: Sarawak, 4th Division, Gn. Mulu N. P., camp 5, v.-viii.1978, B. M. 1978-49 (P. M. Hammorui & J. E. Marshall). Paratypes. 5 workers with same data as holotype (BMNH, ).

References based on Global Ant Biodiversity Informatics

 * Mezger D., and M. Pfeiffer. 2011. Partitioning the impact of abiotic factors and spatial patterns on species richness and community structure of ground ant assemblages in four Bornean rainforests. Ecography 34: 39-48.
 * Mezger D., and M. Pfeiffer. 2011. Partitioning the impact of abiotic factors and spatial patterns on species richness and community structure of ground assemblages in four Bornean rainforest. Ecography 34: 39-48.
 * Pfeiffer M., and D. Mezger. 2012. Biodiversity Assessment in Incomplete Inventories: Leaf Litter Ant Communities in Several Types of Bornean Rain Forest. PLoS ONE 7(7): e40729. doi:10.1371/journal.pone.0040819
 * Pfeiffer M.; Mezger, D.; Hosoishi, S.; Bakhtiar, E. Y.; Kohout, R. J. 2011. The Formicidae of Borneo (Insecta: Hymenoptera): a preliminary species list. Asian Myrmecology 4:9-58