Propodilobus pingorum

Identification
Branstetter (2009) - Propodilobus can be distinguished from Stenamma by the reduced palp formula (3,2 versus 4,3), smoothly convex anterior clypeal margin, distinct 3-segmented antennal club (ACI 74-75 versus 60-70), and elongate propodeal lobes. In addition, the postpetiole is broader than long and the scape and funiculus of Propodilobus have a more robust appearance than in Stenamma.

Propodilobus may be confused with Lordomyrma since Lordomyrma is morphologically diverse and currently lacks an adequate diagnosis. It is possible that when a more comprehensive morphological review of Lordomyrma is undertaken or the phylogenetic position of Propodilobus is tested with molecular data, Propodilobus will be synonymized under Lordomyrma or a related genus. Despite this, from the diagnoses listed in Sarnat (2006) and Taylor (2009), Propodilobus can be distinguished from Lordomyrma by its lack of longitudinal carinae on the clypeus, lack of scrobes and frontal carinae, the presence of an elongate petiolar peduncle, and the presence of elongate propodeal lobes.

Distribution
Known from two locations from Borneo (Sarawak, Malaysia): the type locality (listed below) and Fourth Division, Gunong Mulu National Park (Feb 1978, N.M. Collins, ).

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

Nomenclature

 * orientale. Stenamma orientale DuBois, 1998b: 308, figs. 41-43, 210-212 (w.) MALAYSIA (Sarawak). [Junior primary homonym of orientalis Emery, 1898c: 143.] Replacement name: pingorum DuBois, 2000: 40.
 *  pingorum. Stenamma pingorum DuBois, 2000: 40. Replacement name for orientale DuBois, 1998b: 308. [Junior primary homonym of orientalis Emery, 1898c: 143.] Combination in Propodilobus: Branstetter, 2009: 55.

Type Material
Brandstetter (2009) - Holotype worker and paratype workers, MALAYSIA: Sarawak, First Division, Semengoh Forest Reserve, 19 km SW Kuching (1.33ºN, 110.20ºW) (2 km S 10th mile Bazaar, on Kuching-Penrissen Road), 28–31 May 1968, R.W. Taylor, RWT-68.196, leaf mould berlesate in rainforest [Holotype and paratype workers in examined.] Brandstetter (2009) -