IUCN threat status:

Least Concern (LC)

Distribution

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Range Description

The species (with recognised synonyms) is recorded from Indonesia (Java, Kalimantan, and Sumatra), Malaysia (Peninsular and Borneo (Sarawak and Sabah)), Viet Nam, Cambodia, Lao PDR and from Thailand.

Haas (1969) listed U. contradens from Java. Brandt (1974) considered Uniandra and lumped many of the described species under U. contradens as a ring-species, and recognised 6 subspecies in Thailand but all may be ecophenotypes.
Uniandra c. ascia Hanley, 1856 is described from Penang and listed from the Malay Peninsula south of Ratchaburi Province. In Thailand it is known from the Phetburi River southwards. Haas (1969) reported this as a valid species and listed it from Penang, Sumatra, Cambodia and two synonyms from Borneo.
Uniandra c. rusticoides Brandt, 1974 is known only from the type locality Klong Sog, between Surath Thani and Takua Pa.
Uniandra c. tumidula Lea, 1856 is known from Thailand, Lao PDR, Cambodia, southern Viet Nam.
Uniandra c. rustica Lea, 1856 is known from Petburi River, drainages of the Chao Praya River, and Bang Prakon river (the upper reaches of which are called Klong Saturn and the middle reaches of the Prachinburi River); also Mekong basin in Thailand and Cambodia.
Uniandra c. crossei Deshayes, 1876 is known from Mekong and eastern affluents between Tha Uthen and Ho Chi Min City [Saigon].
Uniandra c. fischeriana Morelet, 1883 is found only in the Sutrang River in eastern Thailand and western Cambodia.

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Source: IUCN

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