The mumburarr whipray (Urogymnus acanthobothrium) is a species of whipray from northern Australia and southern Papua New Guinea, described in 2016.[2]
| Mumburarr whipray | |
|---|---|
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Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Chondrichthyes |
| Subclass: | Elasmobranchii |
| Order: | Myliobatiformes |
| Family: | Dasyatidae |
| Genus: | Urogymnus |
| Species: | U. acanthobothrium
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| Binomial name | |
| Urogymnus acanthobothrium | |
Discovery
editThe first tissue sample was collected in 1999 by scientists funded by the American National Science Foundation, who were researching fish tapeworms.[3] Further specimens were collected under the (Australian) National Environmental Research Program and by observers from the National Fisheries Authority in Papua New Guinea.[3] It was formally described in 2016.[3]
Etymology
editMumburarr, meaning 'stingray', was chosen to recognise the assistance of native traditional landowowners in locating specimens. It is a term from the Limilngan language used by the Minitja people of the West Alligator River region. The epithet acanthobothrium recognises the role of the parasite project in discovering this whipray. They found four species of Acanthobothrium cestodes unique to this host.[1]: 170–171
Description
editThe ray is very large, up to 1.6 m wide. Compared to the related mangrove whipray, Urogymnus granulatus, it has a longer snout and tail, and the snout is more angular. It lacks the white flecks on the upper (dorsal) surface and black margin on the lower (ventral) disc that are seen in the mangrove whipray.[3] Individuals vary from grey-white or grey-brown to yellow-brown above. The holotype specimen was yellow-brown when freshly collected.[1]: 164 Unlike other species in the genus, the mumburarr and mangrove whiprays have tails that are uniformly white past the sting, contrasting with their body colour.[1]: 165, 173–174
Distribution
editThe species inhabits marine and brackish estuarine waters in northern Australia and southern Papua, at depths of 2 to 60 m. It has been found in the Arafura Sea off the Wessel Islands, in rivers of Kakadu National Park in Northern Territory, in the Cambridge Gulf and Ord River in Western Australia, and in the Gulf of Papua.[3][1]: 170, 173 Its range overlaps that of the porcupine ray, U. asperrimus, and the freshwater whipray, U. dalyensis syn. Himantura dalyensis.[3]
References
edit- ^ a b c d e Last, Peter R.; White, William T.; Kyne, Peter M. (2016). "Urogymnus acanthobothrium sp. nov., a new euryhaline whipray (Myliobatiformes: Dasyatidae) from Australia and Papua New Guinea". Zootaxa. 4147 (2): 162–176. doi:10.11646/zootaxa.4147.2.4. PMID 27515613. [1] [2]
- ^ "Species Urogymnus acanthobothrium Last, White & Kyne". FishWisePro. 2016. Retrieved 18 April 2020.
- ^ a b c d e f Wild, Andrea (2016-08-03). "Scientists name giant stingray from northern Australia". CSIROscope. Commonwealth Scientific and Industrial Research Organisation. Retrieved 2 May 2020.