Copelatus tenebrosus Régimbart, 1880

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Copelatus tenebrosus, Thailand, Phang Nga, Khao Lak. (Photo: Udo Schmidt)


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


Copelatus tenebrosus Régimbart, 1880

  • original combination: Copelatus tenebrosus Régimbart, 1880

Type locality

“Indonesia, Sumatra, Solok”, Régimbart (1880)

Type material

Syntypes in Museo Civico di Storia Naturale ‘Giacomo Doria’, Genova, Italy.


India, Southeast Asia (Vietnam, Laos, Cambodia, Thailand, Malaysia), southern China, northern Australia, New Guinea.

Records from Thailand

1 ex., “Thailand, Prov. Phang Nga, Khao Lak, Hotel Similana [8.626576° 98.241906°], on light, 8.-22.XI.2007, leg. U. Schmidt” (Coll. Schmidt); 4 exs., “Thailand, Uthai Thani 110 m, 25 km NW Lan-Sak 65 km NW Uthai-Thani [15.628189° 99.363508°], LF, W.Thielen leg./Coll. Hendrich” (CLH); 2 exs., “THAILAND: Nakhon Nayok, 23 m, 14.306111° 101.224444°, 600m SE Huai Preu Reservoir, 11.8.2017, Atthakor & Hendrich leg.” (THAI_LHWA_2017_08) (ZSM); 7 exs., “Thailand, Nakhon Ratchasima Province, on the road from Khon Kaen to Bangkok, 15.272849°, 102.418652°, near road bridge across คลองสะแทด (Khlong Sathaet), 21.03.2017, leg. H. Shaverdo” (NMW).


The most widespread Copelatus species in Southeast Asia. The species inhabits all kind of shallow and standing water, preferable in cultivated areas (e.g. buffalo puddles and ponds, drainage ditches, paddy fields). At Sathaet River at the edge of a very large pond with much submerged vegetation, bottom – clay, mud, decaying vegetation. Southeast of Huai Preu Reservoir in shallow restpool or buffalo hollous on a meadow.



Original description

  • Régimbart M. 1880: The new Dytiscidae and Gyrinidae collected during the recent scientific Sumatra-expedition. Notes from the Leyden Museum 2: 209-216.

Other references

Online resources