Copelatus sociennus J. Balfour-Browne, 1952

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Copelatus sociennus, from NW Thailand, Chom Thong. (Photo: František Slamka)


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Ordo: Coleoptera
Familia: Dytiscidae
Subfamilia: Copelatinae
Tribus: Copelatini
Genus: Copelatus


Copelatus sociennus J. Balfour-Browne, 1952

  • original combination: Copelatus sociennus J. Balfour-Browne, 1952

Type locality

“China, Hongkong”, (J. Balfour-Browne, 1952)

Type material

Holotype in British Museum of Natural History, London, England.


Southern China, Vietnam, Laos, Thailand.

Records from Thailand

1 ex., “NW Thailand 1991, Chom Thong, 24.-27.4., 18.26 N 98.41 E L. Dembicky leg.” (NHMB); 22 exs.,”Thailand, Phetchabun Province, near (just outside) Nam Nao National Park, Route 2216 then small road off, in village Khlong Choen, 16°40’29“N, 101°44’01“E, 21.03.2017, leg. H. Shaverdo” (2017-Th-05a, 5b, 5 c) (NMW); 1 ex., “THAILAND: Nakhon Nayok, 17 m, 14°14'37"N 101°16'42"E 2.5 km n Si Nawa, 10.8.2017 Atthakor leg.” (THAI_LHWA_2017_03) (ZSM); 2 exs., “THAILAND: Nakhon Nayok, 23 m, 14°18'22"N 101°13'28"E 600m SE Huai Preu Rervoir 11.8.2017, Atthakor leg.” (THAI_LHWA_2017_08) (ZSM), 2 exs., “THAILAND: Nakhon Nayok, 26 m, 14°18'28"N 101°13'23"E 200m S Huai Preu dam 11.8.2017 Atthakor leg.” (THAI_LHWA_2017_07) (ZSM).


At Khlomh Chloen specimens were collected near a dam, in a shadowed puddle, ca. 4 x 2 m, bottom – gravel, stones, leaf litter, in a small (ca. 50 x 50 cm) shadowed puddle, formed by larger stones, under the tree, full of leaves, bottom – surface of the stones, leaf litter, and various other puddles in the riverbed, mainly shallow, with bottom of gravel, sand and bamboo leaf litter, more or less exposed to the sun.



Original description

  • J. Balfour-Browne in Guignot F. 1952a: Description de dytiscides inédits de la collection Régimbart. Revue Française d’Entomologie 19: 17-31.

Other references

Online resources