Morphology: Adult: - Patrus landaisi is most similar to P. garuda but can be distinguished by P. landaisi has the obliquely truncate elytral apices and the median lobe of aedeagus is more parallel-sided and less tapered to towards the apex, with the apex much less constricted.
Figure
Habitat: - P. landaisi was found in a shallow stream and puddles of a drying stream bed.
Distribution: - Chiang Rai Province: Stream close to Ban Phithak Thai, Tap Tao Subdistrict, Thoeng District. - Chiang Rai Province: Stream close to Ban Thai Samakkhi, Tap Tao Subdistrict, Thoeng District.
Work cited: - Suksai, B., Gustafson, G.T., Sites, R.W. and Sangpradub, N. 2021. Review of the Patrus landaisi species group from Thailand with description of three new species (Coleoptera, Gyrinidae). Zootaxa 4991(3): 561–591.
