Rattus mordax

• Main Authors: Don E. Wilson, Russell A. Mittermeier, Thomas E. Lacher, Jr
• Format: Other/Unknown Material
• Language: unknown
• Published: Lynx Edicions 2017
• Subjects: Biodiversity; Taxonomy; Animalia; Chordata; Mammalia; Rodentia; Muridae; Rattus; Rattus mordax; Rattus rattus
• Online Access: https://doi.org/10.5281/zenodo.6788504; http://treatment.plazi.org/id/1E30E27534D6FF67E15A27847E2D856A

707. Eastern New Guinea Rat Rattus mordax French: Rat kaisi / German: Ostneuguinea-Ratte / Spanish: Rata de Nueva Guinea oriental Other common names: Eastern Rat Taxonomy. Mus mordax Thomas, 1904, “8° 30” S. lat., 148° E. long.,” Kumusi River, Papua New Guinea. Rattus mordax is in a clade of Recent New Guinea native species and seems to be close to R. steini, R. praetor, and R. novaeguineae. As currently defined, R. mordax probably represents multiple species, although more research is needed to determine this. Two subspecies recognized. Subspecies and Distribution. R.j.mordaxThomas,1904—ENewGuinea,includingtheHuonpeninsulaandPapuanPeninsula,WoodlarkI,andLouisiadeArchipelago. R. j. fergussoniensis Laurie, 1952 — Goodenough, Fergusson, and Normanby Is, D’Entrecasteaux Is, off SE New Guinea. Descriptive notes. Head-body 142-254 mm, tail 115-203 mm, ear 17-3— 21 mm, hindfoot 28-44 mm; weight 190-255 g. The Eastern New Guinea Rat is large, with coarse and long pelage and coarse spines throughout, being spinier in larger individuals. Dorsum is grizzled deep rust brown, with yellowish brown-tipped hairs and spines. Juveniles are darker and without spines. Venter is dull cream, with gray underfur, and might or might not have flexible spines; reddish brown patch on chin and anterior pectoralregion might be attributed to food stain. Feet are covered with short brownish hair. Ears are medium brown and sparsely haired; vibrissae are fairly short. Tail is ¢.80% of head-body length, unicolored medium brown, and sparsely covered with short hair. Subspecies mordax is larger than fergussoniensis. Skull 1s massive, with conspicuous supraorbital-temporal ridging that develops lateral projection in posterior supraorbital region. There are four pairs of mammae: two axillary and two inguinal. Chromosomal complementis 2n = 32; FN = 60. Habitat. Various habitats including primary mossy tropical forest, tropical scrubland, eucalyptus savanna, secondary forest, rural gardens, and some villages atelevations up to 2800 m. Food and ...