Pseudolasius

Pseudolasius is a genus of ants in the subfamily Formicinae. The genus is known from southern Asia (from India to China) to northern Australia, where it appears to be restricted to tropical areas. These ants are commonly known as twig ants due to their habit of nesting in twigs or hollow stems.

Identification
The mandibles have 4 to 7 teeth, while the maxillary palps have 2 to 5 segments and the labial palps have 2 to 4 segments. The mandibles are small and not easily noticeable. The setae (hairs) on the upper part of the head are randomly distributed, while the scapes, legs, and upper part of the mesosoma (the middle part of the body, including the propodeum) have upright setae. The body is often covered in dense fine hair (pubescence). The eyes are often poorly developed and usually positioned below the middle of the head. The workers exhibit strong polymorphism, with a major caste that has a notched hind margin of the head. The propodeum (the rear part of the mesosoma) has a dorsal face that ranges from low to high-domed, and the overall shape of the mesosoma is compact.

Species

 * Pseudolasius amaurops Emery, 1922
 * Pseudolasius amblyops Forel, 1901
 * Pseudolasius australis Forel, 1915
 * Pseudolasius badius Viehmeyer, 1916
 * Pseudolasius bidenticlypeus Xu, 1997
 * Pseudolasius binghami Emery, 1911
 * †Pseudolasius boreus Wheeler, 1915
 * Pseudolasius breviceps Emery, 1887
 * Pseudolasius butteli Forel, 1913
 * Pseudolasius caecus Donisthorpe, 1949
 * Pseudolasius carinatus Karavaiev, 1929
 * Pseudolasius cibdelus Wu & Wang, 1992
 * Pseudolasius circularis Viehmeyer, 1916
 * Pseudolasius emeryi Forel, 1911
 * Pseudolasius fallax Emery, 1911
 * Pseudolasius familiaris (Smith, 1860)
 * Pseudolasius hummeli Stitz, 1934
 * Pseudolasius isabellae Forel, 1908
 * Pseudolasius jacobsoni Crawley, 1924
 * Pseudolasius karawajewi Donisthorpe, 1942
 * Pseudolasius lasioides Wheeler, 1927
 * Pseudolasius leopoldi Santschi, 1932
 * Pseudolasius liliputi Forel, 1913
 * Pseudolasius longiscapus Wang, W. & Zhao, 2009
 * Pseudolasius ludovici Forel, 1913
 * Pseudolasius machhediensis Bharti, Gul & Sharma, 2012
 * Pseudolasius martini Forel, 1911
 * Pseudolasius mayri Emery, 1911
 * Pseudolasius minor Donisthorpe, 1947
 * Pseudolasius minutissimus Forel, 1913
 * Pseudolasius minutus Emery, 1896
 * Pseudolasius overbecki Viehmeyer, 1914
 * Pseudolasius pallidus Donisthorpe, 1949
 * Pseudolasius pheidolinus Emery, 1887
 * Pseudolasius pygmaeus Forel, 1913
 * Pseudolasius risii Forel, 1894
 * Pseudolasius salvazai Santschi, 1920
 * Pseudolasius sauteri Forel, 1913
 * Pseudolasius sexdentatus Donisthorpe, 1949
 * Pseudolasius silvestrii Wheeler, 1927
 * Pseudolasius similus Zhou, 2001
 * Pseudolasius streesemanni Viehmeyer, 1914
 * Pseudolasius sumatrensis (Mayr, 1883)
 * Pseudolasius sunda Karavaiev, 1929
 * Pseudolasius tenuicornis Emery, 1897
 * Pseudolasius trimorphus Karavaiev, 1929
 * Pseudolasius typhlops Wheeler, 1935
 * Pseudolasius waigeuensis Donisthorpe, 1943
 * Pseudolasius weissi Santschi, 1910
 * Pseudolasius zamrood Akbar, Bharti & Wachkoo, 2017