Crematogaster jacobsoni

Identification
Hosoishi and Ogata (2012) – Examination of syntype workers in and  reveals that C. jacobsoni is not similar to the C. brevis group or C. treubi group in Asia. Characteristic features include: occipital carinae developed; petiole weakly broader anteriorly, but without angular corners; postpetiole weakly bilobed with longitudinal median sulcus. This species is similar to Crematogaster semperi or Crematogaster simoni. We hereby transfer C. jacobsoni to the subgenus Crematogaster, to compare it with closely related species in this group in the future.

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

Nomenclature

 *  jacobsoni. Crematogaster jacobsoni Forel, 1911b: 201 (w.) INDONESIA (Java). Combination in C. (Orthocrema): Emery, 1922e: 132; in C. (Mesocrema): Santschi, 1937e: 310.

Type Material
Hosoishi and Ogata (2012) –Three syntype workers from INDONESIA: Semarang, Java and one syntype worker  [examined].