Mumburarr whipray
A large whipray discovered via tapeworm research in northern Australia.
The mumburarr whipray (Urogymnus acanthobothrium) was formally identified as a distinct species in 2016. It lives in marine and brackish estuarine waters across northern Australia and southern Papua New Guinea, at depths between 2 and 60 meters. Its range includes the Arafura Sea near the Wessel Islands, rivers in Kakadu National Park, the Cambridge Gulf and Ord River in Western Australia, and the Gulf of Papua. This area overlaps with the porcupine ray and the freshwater whipray.
The ray can grow very large, up to 1.6 meters across. Compared to the related mangrove whipray, it has a longer snout and tail, and its snout is more angular. It lacks the white flecks on its upper surface and the black margin on its lower disc that the mangrove whipray has. Its upper side ranges from grey-white or grey-brown to yellow-brown; the holotype specimen was yellow-brown when first collected. Like the mangrove whipray, its tail is uniformly white past the sting, unlike other species in the genus.
The species was discovered through a parasite research project. The first tissue sample was taken in 1999 by scientists funded by the American National Science Foundation, who were studying fish tapeworms. More specimens were later collected under Australia’s National Environmental Research Program and by observers from Papua New Guinea’s National Fisheries Authority. The species was formally described in 2016.
The common name “mumburarr” comes from the Limilngan language of the Minitja people in the West Alligator River region, meaning “stingray.” It was chosen to acknowledge the help of native traditional landowners in finding specimens. The scientific name *acanthobothrium* honors the parasite project, which found four species of *Acanthobothrium* tapeworms unique to this whipray.
Quick Facts
- Genus
- Urogymnus
- Species
- acanthobothrium
Facts from the source article.
Lore & Background
The first tissue sample of the mumburarr whipray was collected in 1999 by scientists funded by the American National Science Foundation, who were researching fish tapeworms. Further specimens were collected under the Australian National Environmental Research Program and by observers from the National Fisheries Authority in Papua New Guinea. It was formally described in 2016.
The name 'mumburarr' means 'stingray' in the Limilngan language of the Minitja people of the West Alligator River region, chosen to recognize the assistance of native traditional landowners in locating specimens. The epithet 'acanthobothrium' acknowledges the parasite project, which found four species of Acanthobothrium cestodes unique to this host.
The 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 a more angular snout. It lacks the white flecks on the upper surface and black margin on the lower disc seen in the mangrove whipray. Individuals vary from grey-white or grey-brown to yellow-brown above; the holotype was yellow-brown when freshly collected. Unlike other species in the genus, the mumburarr and mangrove whiprays have tails that are uniformly white past the sting.
Reader's Guide
The mumburarr whipray's significance lies in its discovery through a parasite-focused research project, highlighting how biodiversity surveys can yield unexpected results. The species was first encountered in 1999 during a study of fish tapeworms funded by the American National Science Foundation, and its formal description in 2016 relied on additional specimens collected under Australian and Papua New Guinean programs. Its name honors the Limilngan language and the Minitja people, whose traditional knowledge aided specimen collection, while its scientific name commemorates the Acanthobothrium cestodes found exclusively in this ray. The species inhabits marine and brackish estuarine waters in northern Australia and southern Papua New Guinea at depths of 2 to 60 m, with records from the Arafura Sea off the Wessel Islands, rivers of Kakadu National Park, the Cambridge Gulf and Ord River in Western Australia, and the Gulf of Papua. Its range overlaps that of the porcupine ray and the freshwater whipray. The mumburarr whipray is distinguished from the similar mangrove whipray by its longer snout and tail, more angular snout, and absence of white flecks on the upper surface and black margin on the lower disc. Its legacy includes demonstrating the value of collaborative research with Indigenous communities and the role of parasite studies in discovering new vertebrate species.
Did You Know?
- Four species of Acanthobothrium cestodes are unique to this whipray host.
- The ray can reach up to 1.6 m wide and has a tail that is uniformly white past the sting.
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