Rakthamichthys digressus
(Gopi 2002) Britz, Dahanukar, Standing, Philip, Kumar and Raghavan 2020
| ORDER | SUB-ORDER | FAMILY |
|---|---|---|
| Synbranchiformes | Synbranchoidei | Synbranchidae |
Note
Species account reviwed by Ralph Britz
Synonyms
Monopterus digressus Gopi 2002
Country
IndiaTypes
Holotype: ZSI-WGFRS 10684 218mm TL. Paratypes: ZSI-WGFRS Seven specimens 150-242mm TL, no identification numbers.
Distribution
Known only from the type locality: Well at Kuthiravattom, a suburb of Calicut, Kerala, India, elevation 40 meters. 11.2543oN, 75.8009oE.
Habitat
The true habitat is not known but is probably small conduits within a laterite aquifer.
Systematics
Britz et al. (2016) state that external similarity to West African Monopterus species suggests that M. digressus might be a member of the ‘Amphipnous group’ within Monopterus.
Conservation Status
(Raghavan, R. and Ali, A. 2011. Monopterus digressus. The IUCN Red List of Threatened Species 2011: http://dx.doi.org/10.2305/IUCN.UK.2011-1.RLTS.T172489A6902653.en. Downloaded on 06 July 2017).
Museum Holdings
As above only.
Internet Resources
Two films of Monopterus digressus searching for food are available.
Key References
- Rosen, D. E. and Greenwood, P. H. (1976)
- Mercy, T.V.A. (1981)
- Mercy, T.V.A. (1981)
- Mercy, T.V.A. (1982)
- Mercy, T.V.A., Padmanabhan, K.G. and Pillai, N.K. (1982)
- Mercy, T.V.A. (1983)
- Mercy, T.V A., Pillai, N.K. and Balasubramonian, N.K. (1984)
- Mercy, T.V.A. and Pillai, N.K. (1984/5)
- Bailey, R M. and Gans, C. (1998)
- Mercy, T.V.A. (2000)
- Ponniah, A.G. and Gopalakrishnan, A. (2000)
- Ranjit Daniels, R.J. (2001)
- Mercy, T.V.A. and Pillai, N.K. (2001)
- Mercy, T.V.A., Pillai, N.K. and Balasubramonian, N.K. (2001)
- Gopi, K.C. (2002)
- Biju, S.D. and Bossuyt, F. (2003)
- Kurup B.M. Radhakrishnan K.V. and Manojkumar T.G. (2004)
- Bossuyt, F., Meegaskumbura, M., Beenaerts, N., Gower, D.J., Pethiyagoda, R., Roelants, K., Mannaert, A., Wilkinson, M., Bahir, M.M., Manamendra-Arachchi, K., Ng, P.K.L., Schneider, C.K., Oommen, O.V. and Milinkovitch, M.C. (2004)
- Roelants, K., Jiang, J. and Bossuyt, F. (2004)
- Dahanukar, N., Raut, R. and Bhat, A. (2004)
- Gunawardene, N.R. et al. (2007)
- Ollier, CD and Sheth, HC (2008)
- Pati, A.K. and Parganiha, A. (2010)
- Subhash Babu, K.K. and Sivasankaran, B.N. (2010)
- Vincent, M. and Thomas, J. (2011)
- Dahanukar, N., Raghavan, R., Ali, A., Abraham, R. and Shaji, C.P. (2011)
- Britz, R., Lalremsanga, H.T., Lalrotluanga and Lalramliana (2011)
- Vincent, M. (2012)
- Vincent, M. and Thomas, K.J. (2012)
- Britz, R., Kakkassery, F. and Raghavan, R. (2014)
- Raghavan, R.., Das, K.., Nameer, P.O., Bijukumar, A. and Dahanukar, N. (2016)
- Britz, R., Doherty-Bone, T.M., Kouete, M.T., Sykes, D. and Gower, D.J. (2016)
- Varma, A. (2017)
- Pavan-Kumar, A. (2017)
- De Grave, S., Arjun, C.P. and Raghavan, R. (2018)
- Britz, R., Sykes, D., Gower, D.J. & Kamei, R.G. (2018)
- Britz, R., Anoop, V.K., Dahanukar, H. and Raghavan, R. (2019)
- Anoop, V.K., Britz, R., Arjun, C.P., Dahanukar, N. and Raghavan, R. (2019)
- Britz, R., Sudasinghe, H., Sykes, D. and Tharindu Ranasinghe, R.H. (2020)
- Sidharthan, A., Raghavan, R., Anoop, V.K., Philip. S. and Dahanukar, N. (2020)
- Britz, R., Dahanukar, N., Anoop, V.K., Philip, S., Clark, B., Raghavan, R. and Rüber, L. (2020)
- Britz, R., Dahanukar, N., Standing, A., Philip, S., Kumar, B. amd Raghavan, R. (2020)
- Raghavan, R., Britz, R. and Dahanukar, N. (2021)
- Vasan, T., Das, P., Varma, V., Tiwari, A., Prakash, A., Manilal, D., Thomas, L., Arjun, C.P., Philip, S., Raghavan, R. and Binoy, V.V. (2021)
| Rosen, D. E. and Greenwood, P. H. | Journal Article | 1976 | A fourth neotropical species of synbranchid eel and the phylogeny and systematics of synbranchiform fishes |
| Mercy, T.V.A. | Journal Article | 1981 | On the unique disposition of the valvula cerebelli in Horaglanis krishnai (Teleostei) |
| Mercy, T.V.A. | Thesis | 1981 | Biology of the blind catfish of Kerala, Horaglanis krishnai Menon |
| Mercy, T.V.A. | Journal Article | 1982 | On the presence of a forked barbel in the blind catfish Horaglanis krishnai Menon |
| Mercy, T.V.A., Padmanabhan, K.G. and Pillai, N.K. | Journal Article | 1982 | Morphological studies on the oocytes of the blind catfish Horaglanis krishnai Menon |
| Mercy, T.V.A. | Journal Article | 1983 | Studies on the air bladder of blind clariid Horaglanis krishnai Menon |
| Mercy, T.V A., Pillai, N.K. and Balasubramonian, N.K. | Journal Article | 1984 | Studies on the oxygen consumption of the blind catfish Horaglanis krishnai |
| Mercy, T.V.A. and Pillai, N.K. | Journal Article | 1984/5 | The anatomy and histology of the alimentary tract of the blind cat-fish Horaglanis krishnai |
| Bailey, R M. and Gans, C. | Journal Article | 1998 | Two new synbranchid fishes, Monopterus roseni from penisular India and M. desilvai from Sri Lanka |
| Mercy, T.V.A. | Book Section | 2000 | Biology of an endemic blind catfish Horaglanis krishnai Menon |
| Ponniah, A.G. and Gopalakrishnan, A. | Book | 2000 | Endemic fish diversity of Western Ghats |
| Ranjit Daniels, R.J. | Journal Article | 2001 | Endemic fishes of the Western Ghats and the Satpura hypothesis |
| Mercy, T.V.A. and Pillai, N.K. | Journal Article | 2001 | Studies on the cranial osteology of the blind catfish Horaglanis krishnai menon (Pisces, Clariidae) |
| Mercy, T.V.A., Pillai, N.K. and Balasubramonian, N.K. | Journal Article | 2001 | Studies on certain aspects of behaviour in the blind catfish Horaglanis krishnia Menon |
| Gopi, K.C. | Journal Article | 2002 | A new synbranchid fish, Monopterus digressus from Kerala, peninsular India |
| Biju, S.D. and Bossuyt, F. | Journal Article | 2003 | New frog family from India reveals an ancient biogeographical link with the Seychelles |
| Kurup B.M. Radhakrishnan K.V. and Manojkumar T.G. | Conference Paper | 2004 | Biodiversity status of fishes inhabiting rivers of Kerala (S. India) with special reference to endemism, threats and conservation measures |
| Bossuyt, F., Meegaskumbura, M., Beenaerts, N., Gower, D.J., Pethiyagoda, R., Roelants, K., Mannaert, A., Wilkinson, M., Bahir, M.M., Manamendra-Arachchi, K., Ng, P.K.L., Schneider, C.K., Oommen, O.V. and Milinkovitch, M.C. | Journal Article | 2004 | Local endemism within the Western Ghats-Sri Lanka biodiversity hotspot |
| Roelants, K., Jiang, J. and Bossuyt, F. | Journal Article | 2004 | Endemic ranid (Amphibia: Anura) genera in southern mountain ranges of the Indian subcontinent represent ancient frog lineages: evidence from molecular data |
| Dahanukar, N., Raut, R. and Bhat, A. | Journal Article | 2004 | Distribution, endemism and threat status of freshwater fishes of the Western Ghats of India |
| Gunawardene, N.R. et al. | Journal Article | 2007 | A brief overview of the Western Ghats-Sri Lanka biodiversity hotspot |
| Ollier, CD and Sheth, HC | Journal Article | 2008 | The High Deccan duricrusts of India and their significance for the ‘laterite’ issue |
| Pati, A.K. and Parganiha, A. | Book Section | 2010 | Subterranean fishes of India |
| Subhash Babu, K.K. and Sivasankaran, B.N. | Conference Paper | 2010 | The hypogean fauna of selected ecosystems of Kerala, India, with two new records |
| Vincent, M. and Thomas, J. | Journal Article | 2011 | Observations on the foraging behaviour of a subterranean fish Monopterus digressus (Synbranchiformes: Synbranchidae) |
| Dahanukar, N., Raghavan, R., Ali, A., Abraham, R. and Shaji, C.P. | Book Section | 2011 | Chapter 3. The status and distribution of freshwater fishes of the Western Ghats |
| Britz, R., Lalremsanga, H.T., Lalrotluanga and Lalramliana | Journal Article | 2011 | Monopterus ichthyophoides, a new species of scaled swamp eel (Teleostei: Synbranchiformes: Synbranchidae) from Mizoram, India |
| Vincent, M. | Journal Article | 2012 | Occurence, distribution and troglomorphisms of subterranean fishes of penninsular India |
| Vincent, M. and Thomas, K.J. | Book Section | 2012 | A preliminary survey on the subterranean piscine diversity in Thrissur District, Kerala, India |
| Britz, R., Kakkassery, F. and Raghavan, R. | Journal Article | 2014 | Osteology of Kryptoglanis shajii, a stygobitic catfish (Teleostei: Siluriformes) from Peninsular India with a diagnosis of the new family Kryptoglanidae |
| Raghavan, R.., Das, K.., Nameer, P.O., Bijukumar, A. and Dahanukar, N. | Journal Article | 2016 | Protected area and imperriled endemic freshwater biodiversity in the Westren Ghats hotspot |
| Britz, R., Doherty-Bone, T.M., Kouete, M.T., Sykes, D. and Gower, D.J. | Journal Article | 2016 | Monopterus luticolus, a new species of swamp eel from Cameroon (Teleostei: Synbranchidae) |
| Varma, A. | Book | 2017 | Groundwater resource and governance in Kerala: status issues and prospects |
| Pavan-Kumar, A. | Journal Article | 2017 | Molecular phylogeny of genus Horaglanis (Indian blind catfishes) within Family Clariidae |
| De Grave, S., Arjun, C.P. and Raghavan, R. | Journal Article | 2018 | The discovery of Euryrhynchidae (Crustacea: Decapoda) in India, with the description of a new genus and species |
| Britz, R., Sykes, D., Gower, D.J. & Kamei, R.G. | Journal Article | 2018 | Monopterus rongsaw, a new species of hypogean swamp eel from the Khasi Hills in Northeast India (Teleostei: Synbranchiformes: Synbranchidae). |
| Britz, R., Anoop, V.K., Dahanukar, H. and Raghavan, R. | Journal Article | 2019 | The subterranean Aenigmachanna gollum, a new genus and species of snakehead (Teleostei: Channidae) from Kerala, India |
| Anoop, V.K., Britz, R., Arjun, C.P., Dahanukar, N. and Raghavan, R. | Journal Article | 2019 | Pangio bhujia, a new, peculiar species of miniature subterranean eel loach lacking dorsal and pelvic fins from India (Teleostei: Cobitidae) |
| Britz, R., Sudasinghe, H., Sykes, D. and Tharindu Ranasinghe, R.H. | Journal Article | 2020 | Ophichthys desilvai, a poorly known synbranchid eel from Sri Lanka (Teleostei: Synbranchidae) |
| Sidharthan, A., Raghavan, R., Anoop, V.K., Philip. S. and Dahanukar, N. | Journal Article | 2020 | Riddle on the riffle: Miocene diversification and biogeography of endemic mountain loaches in the Western Ghats biodiversity hotspot |
| Britz, R., Dahanukar, N., Anoop, V.K., Philip, S., Clark, B., Raghavan, R. and Rüber, L. | Journal Article | 2020 | Aenigmachannidae, a new family of snakehead fishes (Teleostei: Channoidei) from subterranean waters of South India |
| Britz, R., Dahanukar, N., Standing, A., Philip, S., Kumar, B. amd Raghavan, R. | Journal Article | 2020 | Osteology of ‘Monopterus’ roseni with the description of Rakthamichthys, new genus, and comments on the generic assignment of the Amphipnous Group species (Teleostei: Synbranchiformes). |
| Raghavan, R., Britz, R. and Dahanukar, N. | Journal Article | 2021 | Poor groundwater governance threatens ancient subterranean fishes |
| Vasan, T., Das, P., Varma, V., Tiwari, A., Prakash, A., Manilal, D., Thomas, L., Arjun, C.P., Philip, S., Raghavan, R. and Binoy, V.V. | Journal Article | 2021 | Captivity-induced behaviour and spatial learning abilities in an enigmatic, aquifer-dwelling blind eel, Rakthamichthys digressus |