Overbeckia jambiensis

Identification
Overbeckia jambiensis workers are the hairiest of the Overbeckia species, with numerous conspicuous erect hairs present on dorsum of petiole, thorax, and also dorsally and ventrally on the head, abdomen and scape; head integument without punctation and with fine lineation; cuticle covered with sparse, short, appressed hairs that are less numerous but longer than in other species and present all over the head except in the area between the eyes and around carinae; integument darker and glossy; frontal carinae less approaching one another anteriorly compared to those of Overbeckia subclavata but curvature evenly convex when compared to those of the other species in frontal view (Fig. 4d). Lineation present on whole lateral sides of mesosoma, including upper part of frontal coxae and the areas above metathoracic spiracle.

Body size is somewhat larger on average than in the other two Overbeckia species but due to the availability of only two specimens, assessing whether body size is significantly larger is difficult (the size is comparable to the largest workers measured from series of Overbeckia papuana).

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

Nomenclature

 * . Overbeckia jambiensis Klimes, in Klimes et al., 2022: 569, fig. 4 (w.) INDONESIA (Sumatra).

Type Material

 * Holotype: Worker (MZB): BF2.2/7.x.2013/wet season/canopy fogging/lowland forest/Bukit Duabelas National Park/01°58′54.2″S, 102°45′02.3″E/leg. J. Drescher (det. R. Nazarreta, P. Klimes).
 * Paratype: Worker (ZMHB): same data as above but marked as paratype.