Southern Annam




J. Hales



Major Habitat Type

Tropical and subtropical coastal rivers

Drainages flowing into

South China Sea

Main rivers to other water bodies

Perfume River (Sông Hương), Han River, Trà Khúc River, Côn River, Da Rang River, Ba River



This ecoregion extends along the Vietnam coast east of the Annamite Range between (and excluding) Dong Nai in the south to the Deo Hai Van Pass in the north.

Terrestrial habitats

This ecoregion is composed of Southern Vietnam lowland dry forests, Northern Vietnam lowland rain forests, Northern Annamites rain forests, Southern Annamites montane rain forests, and Southeastern Indochina dry evergreen forests (Wikramanayake et al. 2002).

Description of endemic fishes

There are around eight recorded endemics, most of which are in the family Balitoridae. Some of these include Sewellia pterolineata, S. marmorata and Schistura thanho, which are endangered, and Nemacheilus banar, which is vulnerable according the IUCN Red List (IUCN 2012).

Justification for delineation

For Southeast Asia, delineations were determined using a bottom-up approach that employed both published and unpublished field data and expert assessment (Abell et al. 2008; Kottelat 1989). Basins south of the Deo Ha Van Pass have more faunistic affinities with the Mekong basin and Southeast Asia, whereas those in the Northern Annam ecoregion [760] have more affinities with the Song Hong [761] and Xi Yiang [763] ecoregions (M. Kottelat pers. comm. 2006).

Level of taxonomic exploration

Published data on the streams of the eastern slopes of the Annamite Range are scanty (M. Kottelat pers. comm. 2006).


  • Abell, Robin,M.L. Thieme,C. Revenga,M. Bryer,M. Kottelat,N. Bogutskaya,B. Coad,N. Mandrak,S.C. Balderas,W. Bussing,M.L.J. Stiassny,P. Skelton,G.R. Allen,P. Unmack,A. Naseka,R. Ng,N. Sindorf,J. Robertson,E. Armijo,J.V. Higgins,T.J. Heibel,E. Wikramanayake, (2008). "Freshwater Ecoregions of the World: A New Map of Biogeographic Units for Freshwater Biodiversity Conservation" BioScience 58 (5) pp. 403-414.
  • Wikramanayake, Eric,Dinerstein, Eric,Loucks, C.,Olson, D.M.,Morrison, J.,Lamoreux, J. L.,McKnight, M.;Hedao, P. (2002). "Terrestrial ecoregions of the Indo-Pacific: A conservation assessment" Washington, DC: Island Press.
  • Kottelat, M. (1989). "Zoogeography of the fishes from Indochinese inland waters with an annotated check-list" Bulletin Zoologisch Museum Universiteit van Amsterdam 12 (1) pp. 1-54.
  • IUCN (2012) \IUCN Red List of Threatened Species. Version 2012.2\ "<"">" (21 May 2013)