Belongs within: Marsupialia.
The Peramelemorphia includes the bandicoots, a group of long-snouted Australian marsupials. Most species are insectivorous or carnivorous, though the now-extinct pig-footed bandicoot Chaeropus ecaudatus may have been a grazer (Long et al. 2002.
Characters (from Long et al. 2002): Lower molars with very large, un-notched anterior cingulid; upper molars with large adjacent stylar cusps C and D, and buccally shifted centrocrista. Hind feet syndactylous (at least in Perameloidea), with second and third toes reduced and joined by a web of skin).
<==Peramelemorphia
|--Yarala Muirhead & Filan 1995 [Yaralidae, Yaraloidea] LA02
| |--*Y. burchfieldi Muirhead & Filan 1995 LA02
| `--Y. kida MJ11
`--Perameloidea [Peramelidae] LA02
|--Chaeropus ecaudatus CB-E04
`--+--Thylacomyidae LA02
| |--Ischnodon Stirton 1955 LA02
| | `--*I. australis Stirton 1955 LA02
| |--Macrotis CB-E04
| | |--M. lagotis CB-E04
| | `--M. leucura CB-E04
| `--Thylacomys nigripes WJ26
`--+--+--Isoodon CB-E04
| | |--I. macrourus (Gould 1842) CB-E04, K92
| | `--+--I. auratus CB-E04
| | `--I. obesulus (Shaw 1797) CB-E04, BD-D09
| `--Perameles Geoffroy 1803 CB-E04, LA02
| | i. s.: P. allinghamensis Archer 1976 LA02
| | P. bowensis Muirhead, Dawson & Archer 1997 LA02
| | P. eremiana CB-E04
| | P. wombeyensis Broom 1896 F71
| |--P. bougainville CB-E04
| `--+--*P. nasuta Geoffroy 1804 LA02, CB-E04, LA02
| `--P. gunnii CB-E04
`--Peroryctidae LA02
|--Rhynchomeles prattorum LA02, BP87
|--Peroryctes CB-E04
| |--P. broadbenti CB-E04
| |--P. longicaudata TL70
| `--P. raffrayana CB-E04
|--Microperoryctes LA02
| |--M. longicauda CB-E04
| |--M. murina CB-E04
| `--M. papuensis CB-E04
`--Echymipera Lesson 1842 LA02
|--*E. kalubu (Lesson 1828) [=Perameles kalubu] R64
|--E. clara CB-E04
|--E. davidi CB-E04
|--E. doreyana TL70
|--E. echinista CB-E04
`--E. rufescens CB-E04
|--E. r. rufescens R64
`--E. r. australis Tate 1948 R64
*Type species of generic name indicated
REFERENCES
[BD-D09] Beveridge, I. & M.-C. Durette-Desset. 2009. A new species of the nematode genus Copemania (Nematoda: Trichostrongylida), parasitic in the western quoll, Dasyurus geoffroii and short-nosed bandicoot, Isoodon obesulus from south-western Western Australia. Records of the Western Australian Museum 25 (3): 345-349.
[BP87] Burton, J. A., & B. Pearson. 1987. Collins Guide to the Rare Mammals of the World. Collins: London.
[CB-E04] Cardillo, M., O. R. P. Bininda-Emonds, E. Boakes & A. Purvis. 2004. A species-level phylogenetic supertree of marsupials. Journal of Zoology 264: 11-31.
[F71] Fletcher, H. O. 1971. Catalogue of type specimens of fossils in the Australian Museum, Sydney. Australian Museum Memoir 13: 1-167.
[K92] Klompen, J. S. H. 1992. Phylogenetic relationships in the mite family Sarcoptidae (Acari: Astigmata). Miscellaneous Publications, Museum of Zoology, University of Michigan 180: i-vi, 1-154.
[LA02] Long, J., M. Archer, T. Flannery & S. Hand. 2002. Prehistoric Mammals of Australia and New Guinea: One Hundred Million Years of Evolution. University of New South Wales Press: Sydney.
[MJ11] Meredith, R. W., J. E. Janečka, J. Gatesy, O. A. Ryder, C. A. Fisher, E. C. Teeling, A. Goodbla, E. Eizirik, T. L. L. Simão, T. Stadler, D. L. Rabosky, R. L. Honeycutt, J. J. Flynn, C. M. Ingram, C. Steiner, T. L. Williams, T. J. Robinson, A. Burk-Herrick, M. Westerman, N. A. Ayoub, M. S. Springer & W. J. Murphy. 2011. Impacts of the Cretaceous terrestrial revolution and KPg extinction on mammal diversification. Science 334: 521-524.
[R64] Ride, W. D. L. 1964. A list of mammals described from Australia between the years 1933 and 1963 (comprising newly proposed names and additions to the Australian faunal list). Australian Mammal Society Bulletin 7 (Suppl.): 1-15.
[TL70] Turnbull, W. D. & E. L. Lundelius, Jr. 1970. The Hamilton fauna: a Late Pliocene mammalian fauna from the Grange Burn, Victoria, Australia. Fieldiana Geology 19: 1-163.
[WJ26] Wood Jones, F. 1926. The R. M. Johnston Memorial Lecture, 1925. The mammalian toilet and some considerations arising from it. Papers and Proceedings of the Royal Society of Tasmania 1925: 14-62.