LAUSR

The large brown cricket or short-tailed cricket, Tarbinskiellus portentosus (Lichtenstein 1796), is the most common cricket found in Southeast Asia. This study aims to investigates the variation of mitochondrial 16S ribosomal RNA (rRNA) and cytochrome c oxidase subunit 1 (CO1) sequences of T. portentosus in mainland Southeast Asia. Two hundred and nine adults of T. portentosus were collected from 28 different localities. Three haplogroups (A – C) were observed. Haplogroupe A is the most common genetic population of T. portentosus, while haplogroup B demonstrates intraspecific divergence of a species within a common population. Haplogroup C showed the most genetic distinct from a common population and closely related to a sequence of Tarbinskiellus sp. from India. From our study revealed that T. portentosus in mainland Southeast Asia consisted of at least three cryptic genetic variation haplogroups. However, further investigation should be involve more comprehensive genetic and morphological analyses and cover a larger part of their habitat range.