Opistharsostethus malayanus - Lallemand, 1930

Photo taken at Khao Ramrome, c.985m., Nakhon Si Thammarat Prov., Thailand on 20 January 2021.
A new record for Thailand. This montane species is identified by the anterior costal spot being much larger than the others.
Flight Period
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| x |
Range
Malaysia (peninsula) and Thailand
Recorded distribution in Thailand. Nakhon Si Thammarat Province.