Published July 23, 2020 | Version v1
Taxonomic treatment Open

Brevitrygon imbricata Bloch & Schneider

  • 1. School of Biology and Center of Excellence in Phylogeny of living organisms, College of Science, University of Tehran, Tehran, Iran Department of Biology, Faculty of Sciences, Semnan University, Semnan, Iran & kiavash. pro @ gmail. com; https: // orcid. org / 0000 - 0003 - 3874 - 0947
  • 2. School of Biology and Center of Excellence in Phylogeny of living organisms, College of Science, University of Tehran, Tehran, Iran Department of Biology, Faculty of Sciences, Semnan University, Semnan, Iran
  • 3. Insect Taxonomy Research Department, Iranian Research Institute of Plant Protection, Tehran, Iran
  • 4. Institute of Ecology, Diversity and Evolution, Goethe University, Frankfurt / M., Germany & Senckenberg Biodiversity and Climate Research Centre; Senckenberg Gesellschaft für Naturforschung; Frankfurt / M., Germany & judith. kochmann @ senckenberg. de; https: // orcid. org / 0000 - 0001 - 6312 - 7859
  • 5. Institute of Ecology, Diversity and Evolution, Goethe University, Frankfurt / M., Germany & Senckenberg Biodiversity and Climate Research Centre; Senckenberg Gesellschaft für Naturforschung; Frankfurt / M., Germany & Klimpel @ bio. uni-frankfurt. de; https: // orcid. org / 0000 - 0002 - 9191 - 3256

Description

Brevitrygon imbricata or Brevitrygon walga?

Previous molecular studies suggested that B. walga is the only representative of the genus Brevitrygon in the Persian Gulf and the Gulf of Oman (Naylor et al. 2012).Also, the recent revision by Last et al. (2016a) remarked that among four species of the genus Brevitrygon, both B. walga and B. imbricata are restricted to the Indian Ocean while the first is common in the northwestern part of the region (The Persian Gulf and the Gulf of Oman) and the last one inhabits western waters of India (Last et al. 2016b). It seems that some previous reports (Henderson and Reeve 2011; Almoji et al. 2015) and sequences deposited in the databases (Henderson et al. 2016; Naylor et al. 2012) might belong to misidentified specimens (Gavin Naylor pers. comm.).

Therefore, all materials in our collection were morphologically re-examined. The results revealed that specimens collected from the Persian Gulf and the Gulf of Oman have up to 12 enlarged thorns on the base of the tail, 2 (n=60) to 3 (n=29) stinging spines, and the denticle band does not cover the trunk area, which is consistent with all diagnostic characteristics of B. walga. So, the current morphological and molecular (e.g. branch support and genetic distance) evidence support the idea that there is a monophyletic clade and B. walga is the only representative of the genus in the region. Recently, Fernando et al. (2019) reported an unknown taxon that clustered closely to well outside the species. This finding shows that there may be more cryptic species in the genus and more detailed examination should be conducted.

Notes

Published as part of Golzarianpour, Kiavash, Malek, Masoumeh, Golestaninasab, Mehdi, Sarafrazi, Alimorad, Kochmann, Judith & Klimpel, Sven, 2020, Insights into the Urogymnid whiprays (Chondrichthyes: Batoidea) in the Persian Gulf and the Gulf of Oman, with an amendment of their diagnostic characteristics and dispersal range, pp. 316-334 in Zootaxa 4819 (2) on page 330, DOI: 10.11646/zootaxa.4819.2.5, http://zenodo.org/record/4396954

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Linked records

Additional details

Biodiversity

Family
Dasyatidae
Genus
Brevitrygon
Kingdom
Animalia
Order
Myliobatiformes
Phylum
Chordata
Scientific name authorship
Bloch & Schneider
Species
imbricata
Taxon rank
species

References

  • Naylor, G. J. P., Caira, J. N., Jensen, K., Rosana, K. A. M., White, W. T. & Last, P. R. (2012) A DNA sequence-based approach to the identification of shark and ray species and its implications for global elasmobranch diversity and parasitology. Bulletin of the American Museum of Natural History, 367, 1 - 262. https: // doi. org / 10.1206 / 754.1
  • Last, P. R., Naylor, G. J. P. & Manjaji-Matsumoto, B. M. (2016 a) A revised classification of the family Dasyatidae (Chondrichthyes: Myliobatiformes) based on new morphological and molecular insights. Zootaxa, 4139 (3), 345 - 368. https: // doi. org / 10.11646 / zootaxa. 4139.3.2
  • Last, P. R., White, W. T., de Carvalho, M. R., Seret, B., Stehmann, M. & Naylor, G. J. P. (2016 b) Rays of the World. CSIRO Publishing, Collingwood, 801 pp. https: // doi. org / 10.1071 / 9780643109148
  • Henderson, A. C. & Reeve, A. J. (2011) Noteworthy elasmobranch records from Oman. African Journal of Marine Science, 33, 171 - 175. https: // doi. org / 10.2989 / 1814232 X. 2011.572380
  • Almoji, D. K., Moore, A. B. M. & White, W. T. (2015) Sharks & rays of the Arabian / Persian Gulf. MBG (INT) Ltd., London, 178 pp.
  • Henderson, A. C., Reeve, A. J., Jabado, R. W. & Naylor, G. J. P. (2016) Taxonomic assessment of sharks, rays and guitarfishes (Chondrichthyes. Elasmobranchii) from south-eastern Arabia, using the NADH dehydrogenase subunit 2 (NADH 2) gene. Zoological Journal of the Linnean Society, 176, 399 - 442. https: // doi. org / 10.1111 / zoj. 12309
  • Fernando, D., Bown, R. M. K., Tanna, A., Gobiraj, R., Ralicki, H., Jockusch, E. L., Ebert, D. A., Jensen, K. & Caira, J. N. (2019) New insights into the identities of the elasmobranch fauna of Sri Lanka. Zootaxa, 4585 (2), 201. https: // doi. org / 10.11646 / zootaxa. 4585.2.1