Euprenolepis

Lapolla, John S., 2009, Taxonomic Revision of the Southeast Asian Ant Genus Euprenolepis, Zootaxa 2046, pp. 1-25 : 6

Key to Euprenolepis workers

(As E. procera is the only known polymorphic species, this key is designed for the minor caste. If majors are subsequently discovered for other species this key should still work, however, if appropriate adjustments for size are made to accommodate majors. For this reason I have not used measurements as a basis to distinguish between species, except where necessary to do so. Based on differences observed between E. procera majors and minors it appears as if most basic worker level diagnostic characters are retained in both castes). The funiculus is here defined as the part of the antennae minus the scape and condylar bulb and neck.

1 Scapes very long, surpassing posterior margin by about length of the entire funiculus (SI greater than 200); eyes highly reduced (EL no more than 0.05 mm); pronotum and mesonotum greatly elongated, with pronotal width about the same as mesonotal width....................................................................................................................... negrosensis

- Scapes long, but surpassing posterior margin by much less than length of the entire funiculus (SI less than 200); eyes not reduced (EL greater than 0.1 mm); pronotum and mesonotum, if elongated, with pronotal width greater than mesonotal width ........................................................................................................................................................... 2

2 Head, mesosoma, and gaster dark-brown; head and mesosomal dorsum covered with a dense network of reticulate rugulae............................................................................................................................................................... procera

- Head, mesosoma, and gaster brown to yellow; head and mesosomal dorsum not covered with dense network of reticulate rugulae.......................................................................................................................................................... 3

3 Gastral dorsum with a layer of pubescence underneath erect setae ............................................................................. 4

- Gastral dorsum without a layer of pubescence underneath erect setae........................................................................ 5

4 Gastral dorsum with a dense layer of pubsecence found on segments 1–3 (fig. 10B); from dorsum pubescence extends lateroventrally .......................................................................................................................................... thrix

- Gastral dorsum with a scattered layer of pubescence found predominantly on segment 1 (fig. 14B); pubescence does not extend lateroventrally ....................................................................................................................................... zeta

5 Scapes without pubescence; 2nd gastral tergite with two distinct rows of four erect setae (8 long erect setae present on 2nd gastral tergite); eyes more rounded in shape and notably convex in full frontal view; overall dull yellow in color ......................................................................................................................................................................... echinata

- Scapes with pubescence; 2nd gastral tergite with more than 8 long erect setae and these not arranged in distinct rows; eyes more oval in shape and more flattened in appearance in full frontal view; overall shiny brown to yellow in color ...................................................................................................................................................................................... 6

6 In profile, pronotal margin linear as it rises towards mesonotum (fig. 4A); gaster yellow ......................... maschwitzi

- In profile, pronotal margin rounded as it rises towards mesonotum (figs. 11A and 12A); gaster brown to yellowishbrown ........................................................................................................................................................................... 7

7 Gastral setae longer (compare to fig. 11B); majority of gastral setae greater than 0.1 mm in length, with longest setae greater than 0.13 mm in length; overall brownish-yellow, with mesosoma lighter than head and gaster...... variegata

- Gastral setae shorter (compare to fig. 12B); majority of gastral setae less than 0.05 mm in length, with longest setae not exceeding 0.1 mm in length; overall brownish, with pronotum same color as head and gaster, with the propodeum lighter in color ............................................................................................................................................ wittei