Stigmatomma zaojun

Identification
This species resembles Stigmatomma silvestrii (Wheeler, 1928) from Japan, Taiwan, Korea and China, and Stigmatomma octodentatum Xu, 2006, from China (Yunnan Province) but is easily separated from the latter two by the large body size (HL 1.15 mm, HW 1.10 mm, whereas ca. 0.85 mm and 0.70 mm in silvestrii worker and 0.93 mm and 0.80 mm in octodentatum worker, and the wide head with convex lateral margins, and the developed genal teeth.

Distribution based on Regional Taxon Lists
Oriental Region: Taiwan.

Nomenclature

 *  zaojun. Amblyopone zaojun Terayama, 2009: 94, figs. 10, 11 (w.) TAIWAN. Combination in Stigmatomma: Yoshimura & Fisher, 2012: 19.

Description
Holotype worker. Head wide in this genus, slightly longer than wide, with slightly concave posterior margin and convex sides in full face view; front and vertex strongly microreticulate. Mandible with 6 row of triangle teeth and acute subapical and apical teeth. Anterior margin of clypeus with 8 triangular denticles. Antenna with 12 segments, SI-54. Eye small, 0.05 mm in length.

Pro- and mesonota microreticulate. Propodeum with straight dorsal margin in profile and concave posterior margin in dorsal view; dorsal disc microreticulate, lateral surface with transverse rugae. Petiole longer than high, with very weakly concave anterior margin and weakly convex sides; subpetiolar process with convex anterior margin and posterior tooth. Gaster microreticulate.

Worker HL 1.15, HW 1.10, SL 0.65, WL 1.18, PNL 0.80, PH 0.70, DPW 0.61, TL 5.2. Possible female: HL 1.20, HW 1.15, SL 0.67, WL 1.92, PNL 0.76, PH 0.76, DPW 0.66, TL 6.4
 * Measurements (mm).

Body reddish brown; gaster and legs lighter than head and alitrunk.
 * Color.

Worker, Deji, Taichung Hsien, 28.viii. 1988.
 * Holotype.

laf, Anma Shan, 2630 m alt., Hoping Hsiang, Taichung Hsien, 19. x. 1989, Y. Nishikawa leg.
 * Possible female.

The type is preserved in NIAES.
 * Type depository.

The specific epithet is the Chinese noun Jaojun, which is the name of a Taiwanese goddess.
 * Etymology.

The holotype was taken at the Berlese funnel in evergreen broad-leaved forest. A possible female individual is distinctly larger than A. silverstrii female (HL 1.20 mm, HW 1.15 mm, whereas ca. 0.90 mm and 0.75 mm in silvestrii female).
 * Remarks.