Purple Eagle Ray, Myliobatis hamlyni Ogilby 1911


Other Names: Hamlyn's Bull-ray, Purple Bull-ray

A Purple Eagle Ray, Myliobatis hamlyni. Source: Ken Graham. License: All rights reserved

Summary:
A uniform purplish-brown or greenish-brown eagle ray with no spots or blotches, and a whitish underside.

Cite this page as:
Bray, D.J. 2023, Myliobatis hamlyni in Fishes of Australia, accessed 02 Mar 2024, https://fishesofaustralia.net.au/Home/species/3546

Purple Eagle Ray, Myliobatis hamlyni Ogilby 1911

More Info


Distribution

Scattered localities including Forestier Island and Shark Bay, Western Australia, and Swains Reefs, Queensland, to SE of Sydney, New South Wales; also the Norfolk Island region in the Tasman Sea. Elsewhere the species occurs in Indonesia, the Philippines, Taiwan, and southern Japan.
Inhabits the outer continental shelf and upper continental slope at depths of 117-330 m.

Features

Disc diamond-shaped; pectoral fins very large, wing-like, leading edge straight to slightly convex. Whip-like tail slender with a distinctive fold along the ventral surface and 1-2 venomous spines at base. Seven rows of teeth in both jaws, central teeth the largest.

Size

Vertebral centra (total including synarcual) 114–119.
Tail with a distinct, low ventral skin fold; 1-2 relatively long stinging spine, longest spine 13.1–15.9% DW; interorbital space moderately concave in adult males; anterior margins of pectoral fin straight to slightly convex; cranial fontanelle (visible in dorsal view without dissection) relatively wide with slightly convex lateral margins; claspers of adult males 5.5–5.7% DW; predorsal length 63.6–68.6% DW; pectoral-fin radials 85–92 (excluding rostral propterygial radials anterior of eyes).

Biology

Males mature at about 650 mm DW. Little is known of the biology of this species.

Etymology

The species is 'named for Ronald Hamlyn-Harris, Director of the Queensland Museum'.

Species Citation

Myliobatis hamlyni Ogilby 1911, Annals of the Queensland Museum 10: 40. Type locality: Moreton Bay, Queensland.

Author

Bray, D.J. 2023

Resources

Atlas of Living Australia

Purple Eagle Ray, Myliobatis hamlyni Ogilby 1911

References


Compagno, L.J.V. & Last, P.R. 1999. Families Gymnuridae, Myliobatidae, Rhinopteridae, Mobulidae. pp. 1505-1529 in Carpenter, K.E. & Niem, V.H. (eds). The Living Marine Resources of the Western Central Pacific. FAO Species Identification Guide for Fisheries Purposes. Rome : FAO Vol. 3 pp. 1397-2068. 

Cox, G. & Francis, M. 1997. Sharks and Rays of New Zealand. Christchurch : Canterbury University 68 pp. 

Duffy, C.A.J. 2015. Family Myliobatidae. pp. 201-204 in Roberts, C.D., Stewart, A.L. & Struthers, C.D. The Fishes of New Zealand. Wellington : Te Papa Press Vol. 2 pp. 1-576.

Francis, M. 1993. Checklist of the coastal fishes of Lord Howe, Norfolk, and Kermadec Islands, southwest Pacific Ocean. Pacific Science 47(2): 136-170 figs 1-2 

Francis, M. 2001. Coastal Fishes of New Zealand. Auckland : Reed Publishing (NZ) 3rd edn, 103 pp.

Grant, E.M. 1975. Guide to Fishes. Brisbane : Queensland Government, Co-ordinator General’s Department 640 pp. 

Hector, J. 1877. Notes on New Zealand ichthyology. Transactions of the New Zealand Institute 9: 465-469

Johnson, J.W. 2010. Fishes of the Moreton Bay Marine Park and adjacent continental shelf waters, Queensland, Australia. pp. 299-353 in Davie, P.J.F. & Phillips, J.A. Proceedings of the Thirteenth International Marine Biological Workshop, The Marine Fauna and Flora of Moreton Bay. Memoirs of the Queensland Museum 54(3) 

Kyne, P.M., Johnson, J.W., Courtney, A.J. & Bennett, M.B. 2005. New biogeographical information on Queensland chrondrichthyans. Memoirs of the Queensland Museum 50(2): 321-327 

Last, P.R. & Stevens, J.D. 1994. Sharks and Rays of Australia. Canberra : CSIRO Australia 513 pp. 84 pls. 

Last, P.R. & Stevens, J.D. 2009. Sharks and Rays of Australia. Collingwood : CSIRO Publishing Australia 2, 550 pp. 

Ogilby, J.D. 1911. Descriptions of new or insufficiently described fishes from Queensland waters. Annals of the Queensland Museum 10: 36-58 figs 5-6 See ref at BHL

White, W.T. 2014. A revised generic arrangement for the eagle ray family Myliobatidae, with definitions for the valid genera. Zootaxa 3860(2): 149–166. https://doi.org/10.11646/zootaxa.3860.2.3

White, W.T., Kawauchi, J., Corrigan, S.,  Rochel, E. & Naylor, G.J.P. 2015. Redescription of the eagle rays Myliobatis hamlyni Ogilby, 1911 and M. tobijei Bleeker, 1854 (Myliobatiformes: Myliobatidae) from the east Indo-West Pacific. Zootaxa 3948(3): 521-548. https://doi.org/10.11646/zootaxa.3948.3.7

White, W.T., Kyne, P.M. & Last, P.R. 2016. Myliobatis hamlyni. The IUCN Red List of Threatened Species 2016: e.T60124A68634957. https://dx.doi.org/10.2305/IUCN.UK.2016-1.RLTS.T60124A68634957.en. Accessed on 08 March 2022.

White, W.T. & Last, P.R. 2016. 30. Eagle Rays. Family Myliobatidae. pp. 706-725 in Last, P.R., White, W.T., Carvalho, M.R. de, Séret, B., Stehmann, M.F.W. & Naylor, G.J.P. (eds). Rays of the World. Clayton South, Victoria : CSIRO Publishing 790 pp.

White, W.T. & Naylor, G.J.P. 2016. Resurrection of the family Aetobatidae (Myliobatiformes) for the pelagic eagle rays, genus AetobatusZootaxa 4139(3): 435-438. https://doi.org/10.11646/zootaxa.4139.3.10

Whitley, G.P. 1940. The Fishes of Australia. Part 1. The sharks, rays, devil-fish, and other primitive fishes of Australia and New Zealand. Sydney : Roy. Zool. Soc. N.S.W. 280 pp. 303 figs.

Quick Facts


CAAB Code:37039004

Conservation:IUCN Near Threatened

Danger:Venomous spine

Depth:117-130 m

Habitat:Outer shelf and upper slope

Max Size:114 cm disc width

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Species Maps

CAAB distribution map