Abell, R., 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, D. Olson, H. L. López, R. E. Reis, J. G. Lundberg, M. H. Sabaj-Peréz & P. Petry. 2008. Freshwater ecoregions of the world: a new map of biogeographic units for freshwater biodiversity conservation. Bioscience, 58: 403-414.

Allen, D. J., S. Molur & B. A. Daniel. 2010. The status and distribution of freshwater biodiversity in the Eastern Himalaya. IUCN, Cambridge, UK, 90 pp.

Bailey, R. M. & C. Gans. 1998. Two new synbranchid fishes, Monopterus roseni from Peninsular India and M. desilvai from Sri Lanka. Occasional Papers of the Museum of Zoology University of Michigan, 726: 1-18.

Best, A., J. S. Perkin, A. K. Pinion, H. Binkley & K. W. Conway. 2022. First record of the Gangetic Swamp Eel, Ophichthys cuchia (Hamilton, 1822) (Teleostei: Synbranchidae), from Texas (USA) based on museum vouchered material, and confirmation of a second established non-native population in the USA. Check List, 18: 475-482.

Britz, R. 2019. Francis Hamilton’s Gangetic fishes in colour. A new edition of the 1822 monograph, with reproductions of unpublished coloured illustrations. Edited, with an introduction and commentary by Ralf Britz. The Ray Society, London, 1-38, i-viii, 1-405 pp., 1-228 pls.

Britz, R., G. D. Johnson & S. Favorito. 2003. The hyopalatine arch of a 25 mm larva of Synbranchus and homology of the single pterygoid in the Synbranchidae (Teleostei: Synbranchiformes). Proceedings of the Biological Society of Washington, 116: 337-340.

Britz, R., H. T. Lalremsanga, Lalrotluanga & Lalramliana. 2011. Monopterus ichthyophoides, a new species of scaled swamp eel (Teleostei: Synbranchiformes: Synbranchidae) from Mizoram, India. Zootaxa, 2936: 51-58.

Britz, R., T. M. Doherty-Bone, M. T. Kouete, D. Sykes & D. J. Gower. 2016. Monopterus luticolus, a new species of swamp eel from Cameroon (Teleostei: Synbranchidae). Ichthyological Exploration of Freshwaters, 27: 309-323.

Britz, R., D. Sykes, D. J. Gower & R. G. Kamei. 2018. Monopterus rongsaw, a new species of hypogean swamp eel from the Khasi Hills in Northeast India (Teleostei: Synbranchiformes: Synbranchidae). Ichthyological Exploration of Freshwaters, 28: 315-326.

Britz, R., H. Sudasinghe, D. Sykes & R. H. Tharindu Ranasinghe. 2020a. Ophichthys desilvai, a poorly known synbranchid eel from Sri Lanka (Teleostei: Synbranchidae). Ichthyological Exploration of Freshwaters, 30: 1-16.

Britz, R., N. Dahanukar, A. Standing, S. Philip, B. Kumar & R. Raghavan. 2020b. Osteology of ‘Monopterus’ roseni with the description of Rakthamichthys, new genus, and comments on the generic assignment of the Amphipnous Group species (Teleostei: Synbranchiformes). Ichthyological Exploration of Freshwaters, 30: 221-236.

Britz, R., A. Standing, B. Kumar, M. Kripakaran, U. Katwate, R. L. Sundar & R. Raghavan. 2021. Ophichthys fossorius, a poorly known South Indian swamp eel (Teleostei: Synbranchidae). Ichthyological Exploration of Freshwaters, 31: 83-96.

Britz, R., L. Manuelli & A. Standing. 2022. Osteology of the Mexican subterranean swamp eel Ophisternon infernale (Teleostei: Synbranchidae). Ichthyological Exploration of Freshwaters, IEF-1188: 1-14.

Chaudhuri, B. L.1913. Zoological results of the Abor expedition. XVIII. Fish. Records of the Indian Museum, 8: 243-257.

Favorito, S. E., A. M. Zanata & M. I. Assumpção. 2005. A new Synbranchus (Teleostei, Synbranchiformes: Synbranchidae) from ilha de Marajó, Pará, Brazil, with notes on its reproductive biology and larval development. Neotropical Ichthyology, 3: 319-328.

Gopi, K. C. 2002. A new synbranchid fish, Monopterus digressus from Kerala, Peninsular India. Records of the Zoological Survey of India, 100: 137-143.

Hamilton, F. 1822. An account of the fishes found in the river Ganges and its branches. Constable & Co, Edinburgh, vii + 405 pp., 39 pls.

Hora, S. L. 1931.  Buchanan’s ichthyological manuscript entitled “Piscium Bengalae Inferioris Delineationes”. Journal and Proceedings of the Asiatic Society of Bengal (New Series), 27: 123-135.

Hyrtl, C. J. 1858. Über den Amphibienkreislauf von Amphipnous und Monopterus. Denkschriften der Akademie der Wissenschaften Wien. Mathematisch-Naturwissenschaftliche Classe, 14: 38-49.

Jordan, F., Nico, L. G., Huggins, K. A., Martinat, P. J., Martinez, D. A. & V. L. Rodrigues V. L. 2020 Discovery of a reproducing wild population of the swamp eel Amphipnous cuchia (Hamilton, 1822) in North America. BioInvasions Records, 9: 367-374.

Kamei, R. G. 2018. An overview of caecilians (Amphibia: Gymnophiona) of North East India. Pp. 49-72 in: A. Das (ed.), Diversity and ecology of amphibians of India. ENVIS bulletin: wildlife & protected areas. Volume 19. Wildlife Institute of India, Dehradun.

Kamei, R. G., D. San Mauro, D. J. Gower, I. Van Bocxlaer, E. Sherratt, A. Thomas, S. Babu, F. Bossuyt, M. Wilkinson & S. D. Biju. 2012. Discovery of a new family of amphibians from northeast India with ancient links to Africa. Proceedings of the Royal Society B, 279: 2396-2401.

Kamei, R. G., D. J. Gower, M. Wilkinson & S. D. Biju. 2013. Systematics of the caecilian family Chikilidae (Amphibia: Gymnophiona), with description of three new species of Chikila from northeast India. Zootaxa, 3666: 401-435.

Kottelat, M. 2013. The fishes of the inland waters of Southeast Asia: a catalogue and core bibliography of the fishes known to occur in freshwaters, mangroves and estuaries. The Raffles Bulletin of Zoology, Supplement 27: 1-663.

Liem, K. F. 1961. Tetrapod parallelism and other features in the functional morphology of Fluta alba Zuiew (Pisces: Teleostei). Journal of Morphology, 108: 131-144.

Menon, A. G. K. 1999. Check list of freshwater fishes of India. Records of the Zoological Survey of India, Occasional Paper 175: 1-366.

Rastogi, M. 1964. The head skeleton of Amphipnous cuchia (Ham.). Acta Zoologica, 56: 283-292.

Rosen, D. E. & P. H. Greenwood. 1976. A fourth Neotropical species of synbranchid eel and the phylogeny and systematics of synbranchiform fishes. Bulletin of the American Museum of Natural History, 157: 1-69.

Rüber, L., H. H. Tan & R. Britz. 2020. Snakehead (Teleo­stei: Channidae) diversity and the Eastern Himalaya biodiversity hotspot. Journal of Zoological Systematics and Evolutionary Research, 58: 356-386.

Samuel, C. T. 1963. The blood vascular system in Amphipnous fossorius Nair with a discussion on the evolutionary trends in the order Synbranchoidea. Bulletin of the Department of Marine Biology and Oceanography, University of Kerala, 1: 36-43.

Talwar, P.  K. & A. G. Jhingran. 1991. Inland fishes of India and adjacent countries. Oxford & IBH, New Delhi, 1158 pp.

Vishwanath, W. 2002. Fishes of North East India – a field guide to species identification. Department of Life Sciences, Manipur University, Imphal, 198 pp.