Nesoryzomys indefessus
– Extinct
Taxonomy
|
Kingdom:
|
ANIMALIA
|
|
Phylum:
|
CHORDATA
|
|
Class:
|
MAMMALIA
|
|
Order:
|
RODENTIA
|
|
Family:
|
MURIDAE
|
|
Scientific Name:
|
Nesoryzomys indefessus
|
|
Species Authority:
|
(Thomas, 1899)
|
|
Common Name/s:
|
| English | — | INDEFATIGABLE GALAPAGOS MOUSE |
|
|
Taxonomic Notes:
|
The taxonomy of this taxon is debateable. It appears in the 1996 Red List that the concept as defined by Wilson & Reeder was followed, which places N. narboroughii, a species common on Fernandina, in synonymy with N. indefessus. Recent evidence, however, suggests that the two should be treated as separate species and as a result, the status has to change to Extinct.
Will be transferred to family Cricetidae.
|
Assessment Information
|
Red List Category & Criteria:
|
EX ver 2.3 (1994)
|
|
Year Assessed:
|
2000
|
|
Assessor/s:
|
Dowler, R.C., Carroll, D.S. & Edwards, C.W.
|
|
Evaluator/s:
|
Hilton-Taylor, C. & Pollock, C.M. (Red List Programme Office)
|
|
Justification:
|
In the 1996 Red List, the taxonomic concept for this species included the relatively common N. narboroughi from Fernandina Island. However, recent evidence suggests they should be treated as separate species. As a result, N. indefessus which was confined to the island of Santa Cruz must be listed as Extinct. Specimens were last collected in 1934 and repeated surveys at several places on the island have failed to locate any individuals. The extinction is probably due to the introduction of the Black Rat Rattus rattus to the island in the late 1930s and was either the result of the introduction of pathogens to which the native species was susceptible or through direct competition with the introduced species. Other species introduced include House Mouse Mus musculus, the Norway Rat R. norvegicus and feral cats, all of which would also have had an impact on rodent decline and extinction.
|
|
History:
|
| 1996 | - | Endangered (Baillie and Groombridge 1996) |
|
Geographic Range
|
Countries:
|
Regionally extinct:
Ecuador (Galápagos)
|
Habitat and Ecology
