New Ireland Forest Rat
Rattus sanila Flannery & White, 1991
También llamadaNew Ireland Forest Rat (eng) · szczur nowoirlandzki (pol) · ニューアイルランドクマネズミ (jpn)
Descrita por primera vez en: Nat. Geog. Res. Explor. vol.7 p.102
The New Ireland forest rat (Rattus sanila) is a large rodent in the family Muridae. It is endemic to New Ireland, in the Bismarck Archipelago, Papua New Guinea.
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discussion
Discussion: Rattus species group unresolved. Represented only by subfossil fragments dated at 3000 years before present and older (late Pleistocene to mid-Holocene), but may still occur in primary forest, which has not been adequately sampled. Flannery and White (1991) described sanila as a subspecies of R. mordax, but most dental measurements of sanila exceed and do not overlap those of even the largest known R. mordax, suggesting the former to be a separate species, which even Flannery and White acknowledged (also see Flannery, 1995 b). Recent taxonomic and stratigraphic analysis of rodent remains from New Ireland and Manus Isl has confirmed the specific status of sanila (K. P. Aplin and M. Leavesley, in litt., 2004). Although originally phylogenetically allied with R. mordax (Flannery and White, 1991), K. Aplin (in litt., 2004) noted that upper molars of R. sanila " ... are very complex in comparison with typical New Guinea Rattus, " and he suspects the species may be a relict of an archaic, and original, dispersal of ancestral Rattus stock to New Guinea and Australia.
Order Rodentia - Family Muridae
discussion
COMMENTS: Represented only by subfossil fragments dated at 3000 before present and older, but may still occur in primary forest, which has not been adequately sampled. Flannery and White (1991) described sanila as a subspecies of R. mordax, but most of the dental measurements of sanila exceed and do not overlap those of even the largest known mordax, suggesting the former to be a separate species, which even Flannery and White acknowledged.
Order Rodentia - Family Muridae
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Descripción
Rattus sanila is known only by the discovery of some 7 subfossil fragments of jaw dated to over 3,000 years old. The molars of this particular species are broad and have a very complex structure of the cusp. The diastema is also longer than in other species of the genus Rattus suggesting a separate species which may be a relict of an archaic or ancestral dispersal of Rattus stock to New Guinea and Australia. This species probably still survives in some primary forest.
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