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Superregnum: Eukaryota
Cladus: Unikonta
Cladus: Opisthokonta
Cladus: Holozoa
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Superphylum: Deuterostomia
Phylum: Chordata
Subphylum: Vertebrata
Infraphylum: Gnathostomata
Megaclassis: Osteichthyes
Cladus: Sarcopterygii
Cladus: Rhipidistia
Cladus: Tetrapodomorpha
Cladus: Eotetrapodiformes
Cladus: Elpistostegalia
Superclassis: Tetrapoda
Cladus: Reptiliomorpha
Cladus: Amniota
Cladus: Synapsida
Cladus: Eupelycosauria
Cladus: Sphenacodontia
Cladus: Sphenacodontoidea
Cladus: Therapsida
Cladus: Theriodontia
Cladus: Cynodontia
Cladus: Eucynodontia
Cladus: Probainognathia
Cladus: Prozostrodontia
Cladus: Mammaliaformes
Classis: Mammalia
Subclassis: Trechnotheria
Infraclassis: Zatheria
Supercohors: Theria
Cohors: Eutheria
Infraclassis: Placentalia
Cladus: Boreoeutheria
Superordo: Euarchontoglires
Ordo: Rodentia
Subordo: Myomorpha
Superfamilia: Muroidea

Familia: Muridae
Subfamilia: Murinae
Genus: Hydromys
Species: Hydromys ziegleri

Hydromys ziegleri Helgen, 2005: 10

Holotype: BBM-NG 101683, adult ♀, skin and skull.

Type locality: “Bainyik (03°40'S, 143°05'E), circa 5 km south of Maprik, 700 ft (= 213 m), East Sepik Province, Papua New Guinea.”
Primary references

Helgen, K.M. 2005. The amphibious murines of New Guinea (Rodentia, Muridae): The generic status of Baiyankamys and description of a new species of Hydromys. Zootaxa 913: 1–20. Abstract & excerpt. Reference page.


Gerrie, R. & Kennerley, R. 2016. (errata version published in 2017) IUCN: Hydromys ziegleri (Data Deficient). The IUCN Red List of Threatened Species 2016: e.T136476A115208415. DOI: 10.2305/IUCN.UK.2016-3.RLTS.T136476A22401690.en

Vernacular names
English: Ziegler's Water Rat

Ziegler's water rat (Hydromys ziegleri), described in the mid-2000s, is a semiaquatic species of rodent native to the mountains Papua New Guinea of which little is known.[1]
Research and history

It was described in 2005 by K. Helgen,[2] and later was assessed by Helgen, and A. Allison in 2008.[1] The water rat was named in honor of the deceased Dr. Alan C. Ziegler from the Bishop Museum.[2] It has been rated as data deficient for the purposes of the IUCN redlist because insufficient is known about the creature's population range, threats, and numbers.[1] Only two specimens have ever been recorded by scientists.[1] The water rat may be threatened by logging of its forest habitat but more research is needed to codify this theory.[1] It is also believed it may inhabit the northern slopes of its mountain home but study is needed to determine this as fact.[1]

This species inhabits both terrestrial and freshwater systems. This includes forests, subtropical and tropical moist lowland forests, inland wetlands, permanent watercourses, and artificial terrestrial areas.[1] The animal has only been recorded in Bainyik, located on the south slopes of the Prince Alexander Mountains at an elevation of 200 meters (650 feet).[1] The rat has been found to live in creeks and rivers in low lying tropical rain forests but it may also live in higher elevations.[1]

Helgen, K. & Allison, A. (2008). "Hydromys ziegleri". IUCN Red List of Threatened Species. 2008. Retrieved 6 November 2011.
Dictionary of Australian and New Guinean mammals, Ronald Strahan, Pamela Conder, 2007, access date 06-11-2011.

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