The first record of the species was made by Asahina in 1997. Based on a single female, which was collected from
, Asahina erected the new
subspecies Protosticta khaosoidaoensis
satoi. Later, in 2008, Van Tol studied specimens collected from Tam Dao National Park Cuc Phuong National Park, Ninh
National Park, Vinh
Phuc Province, Vietnam
and compared them to Protosticta
beaumonti Wilson 1997 dark form from
(Wilson & Reels 2003). Based on the material from Guangxi, China Cuc
Park, he concluded that “satoi” is a distinct species,
differing from the
species, P. khaosoidaoensis. Van Tol
believed it possible that specimens from Cuc Phuong, the female from Tam Dao
(Asahina, June 1997) and P. beaumonti
Thailand Wilson, March 1997 from Hong
Kong might belong to the same species but elected to establish P.
satoi as a distinct species. It is possible, and perhaps most likely, that the
dark form P. beaumonti from Guangxi sensu Wilson & Reels 2003 is indeed
distinct from P. beaumonti ,
1997 and is synonymous with P. satoi
(Asahina, 1997). Wilson
It is small size Protosticta damselfly with tiny body and dark colour. The head is black with dark green compose eyes. The prothorax is nearly entry cream white, while the synthorax is mostly shining green black except two cream white markings at the border next to the abdomen and below the hind wings. All of the basal segments of three legs are cream-white, the femurs as well as tibias are also cream-white but darker. The wings are hyaline, little bit more than or proximal haft of the abdomen, with dark brown pterostigmas. The abdomen is dark brown with cream yellow or white markings; the 9th segment is cream white. The anal appendages are dark brown. Male and female of the species are quite similar.
They are found at clean, running streams in good forests of high mountain area, the elevation is about more than 700m. The flying forms usually live very near the breeding sites with high humidity. Similar to other members of the family, they are slow flying insects and hide in shade of the forests.
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