Editing Peramelemorphia

{{Short description|Order of marsupials}}
{{more citations needed|date=February 2008}}
{{Automatic taxobox
| name = Peramelemorphia
| fossil_range = {{Fossil range|Late Oligocene|Recent}}
| image = Taxidermied Bandicoot.jpg
| image_caption = A [[short-nosed bandicoot]] (''Isoodon'' spp.)
| taxon = Peramelemorphia
| authority = [[Florentino Ameghino|Ameghino]], 1889
| subdivision_ranks = Families
| subdivision = * [[Peramelidae]] (bandicoots)
* [[Macrotis|Macrotidae]] (bilbies)
* †[[Chaeropodidae]] (pig-footed bandicoots)
* †[[Yaralidae]]
}}
The [[Order (biology)|order]] '''Peramelemorphia''' {{IPAc-en|p|E|r|@|m|E|l|ᵻ|'|m|ɔr|f|i|@}} includes the [[bandicoot]]s and [[bilby|bilbies]]. All members of the order are [[endemic]] to [[Australia]]-[[New Guinea]] and most have the characteristic bandicoot shape: a plump, arch-backed body with a long, delicately tapering snout, very large upright ears, relatively long, thin legs, and a thin tail. Their size varies from about 140 grams up to 4 kilograms,<ref>Aplin, K.P., Helgen, K.M., Lunde, D.P., 2010. [http://digitallibrary.amnh.org/bitstream/handle/2246/6082/N3696-Aplin.pdf?sequence=1 A review of Peroryctes broadbenti, the giant bandicoot of Papua New Guinea]. . ''American Museum Novitates'' 3696, 1-41.</ref> but most species are about one kilogram.

==Phylogeny==
{{see also|List of peramelemorphs}}

===Placement within Marsupialia===
The position of the Peramelemorphia within the marsupial family tree has long been puzzling and controversial. There are two [[morphology (biology)|morphological]] features in the order that appear to show a clear evolutionary link with another marsupial group: the type of foot, and the teeth. Unfortunately, these clear signposts point in opposite directions.<ref>Gordon, G., Hulbert, A.J., 1989. Peramelidae, In: Walton, D.W. (Ed.), Fauna of Australia. . Australian Government Publishing Service, Canberra, pp. 603–624.</ref>

All members of the order are polyprotodont (have several pairs of lower front teeth)&mdash;in the case of the Peramelemorphia, three pairs. This suggests that they have evolved within [[Dasyuromorphia]] (marsupial carnivores). On the other hand, they also have an unusual feature in their feet: the second and third toes are fused together. This condition is called [[syndactyl]]y, and is characteristic of the [[Diprotodontia]] (the order of marsupial [[herbivore]]s that includes [[kangaroo]]s, [[wombat]]s, [[Phalangeriformes|possums]], and many others).<ref>Strahan, R. 1995. Mammals of Australia. Washington, D.C.: Smithsonian Institution Press.</ref>

Attempts to resolve this puzzle include the view that the bandicoot group evolved from the carnivores, retaining the polyprotodont dentition, and independently evolving a syndactyl hind foot; the contrary view that syndactyly is so unusual that it is unlikely to have evolved twice and therefore the bandicoot group must have evolved from a possum-like diprotodont creature, and re-evolved its extra teeth. A third view suggests that the bandicoot group evolved from a primitive carnivore, developed the syndactylous hind foot as a specialisation for climbing, and the diprotodonts then split off and evolved the two-tooth jaw that gives them their name. Recent molecular level investigations do not so far appear to have resolved the puzzle, but do strongly suggest that whatever the relationship of the bandicoot group to the other marsupial orders may be, it is a distant one.<ref name="Meredith 2008" />

===Relationships within Peramelemorphia===
Recent molecular analyses have resulted in a [[phylogenetic]] reconstruction of the members of Peramelemorphia with quite strong support. The most [[basal (phylogenetics)|basal]] split separates [[Thylacomyidae]] (''[[Macrotis]]'') from all other bandicoots. Probably the next to diverge was the recently extinct Chaeropodidae (''[[Pig-footed bandicoot|Chaeropus]]''). The remaining taxa comprise the [[Peramelidae]], which divides into subfamilies [[Peramelinae]] (''[[Isoodon]]'' and ''[[Perameles]]'') and a clade in which the [[Echymiperinae]] (''[[Echymipera]]'' and ''[[Microperoryctes]]'') form a sister group to [[Peroryctinae]] (''[[Peroryctes]]''):

{| class="wikitable"
|-
! colspan=1 | Meredith 2008<ref name="Meredith 2008">{{cite journal |author1=Meredith, Robert W. |author2=Westerman, Michael |author3=Springer, Mark S. | year = 2008 | title = A timescale and phylogeny for "Bandicoots" (Peramelemorphia: Marsupialia) based on the sequences for five nuclear genes | journal = Molecular Phylogenetics and Evolution | volume = 47 | issue = 1 | pages = 1–20 | doi = 10.1016/j.ympev.2008.01.002 | pmid=18328736|bibcode=2008MolPE..47....1M }}</ref>
! colspan=1 | Upham et al. 2019<ref name="Upham2019">{{cite journal |last1=Upham |first1=Nathan S. |last2=Esselstyn |first2=Jacob A. |last3=Jetz |first3=Walter |year=2019 |title=Inferring the mammal tree Species-level sets of phylogenies for questions in ecology, evolution, and conservation |journal=PLOS Biology |volume=17 |issue=12 |pages= e3000494|doi=10.1371/journal.pbio.3000494 |doi-access=free |pmid=31800571 |pmc=6892540 }}</ref><ref>{{cite journal |last1=Upham |first1=Nathan S. |last2=Esselstyn |first2=Jacob A. |last3=Jetz |first3=Walter |year=2019 |title=DR_on4phylosCompared_linear_richCol_justScale_ownColors_withTips_80in |url=https://github.com/n8upham/MamPhy_v1/blob/master/Fig6_compare_tipDRs/DR_on4phylosCompared_linear_richCol_justScale_ownColors_withTips_80in.pdf |journal=PLOS Biology |volume=17 |issue=12 |pages= e3000494|doi=10.1371/journal.pbio.3000494 |doi-access=free |pmid=31800571 |pmc=6892540 }}</ref>
! colspan=1 | Álvarez-Carretero et al. 2022<ref>{{cite journal |last1=Álvarez-Carretero |first1=Sandra |last2=Tamuri |first2=Asif U. |last3=Battini |first3=Matteo |last4=Nascimento |first4=Fabrícia F. |last5=Carlisle |first5=Emily |last6=Asher |first6=Robert J. |last7=Yang |first7=Ziheng |last8=Donoghue |first8=Philip C.J. |last9=dos Reis |first9=Mario |year=2022 |title=A species-level timeline of mammal evolution integrating phylogenomic data |journal=Nature |volume= 602|issue=7896 |pages=263–267 |doi=10.1038/s41586-021-04341-1 |pmid=34937052 |bibcode=2022Natur.602..263A |url=https://www.nature.com/articles/s41586-021-04341-1|hdl=1983/de841853-d57b-40d9-876f-9bfcf7253f12 |hdl-access=free }}</ref><ref>{{cite journal |last1=Álvarez-Carretero |first1=Sandra |last2=Tamuri |first2=Asif U. |last3=Battini |first3=Matteo |last4=Nascimento |first4=Fabrícia F. |last5=Carlisle |first5=Emily |last6=Asher |first6=Robert J. |last7=Yang |first7=Ziheng |last8=Donoghue |first8=Philip C.J. |last9=dos Reis |first9=Mario |year=2022 |title=4705sp_colours_mammal-time.tree |journal=Nature |volume= 602|issue=7896 |pages=263–267 |doi=10.1038/s41586-021-04341-1 |pmid=34937052 |bibcode=2022Natur.602..263A |url=https://figshare.com/articles/dataset/Data_for_A_Species-Level_Timeline_of_Mammal_Evolution_Integrating_Phylogenomic_Data_/14885691|hdl=1983/de841853-d57b-40d9-876f-9bfcf7253f12 |hdl-access=free }}</ref>
|- 
| style="vertical-align:top|
{{Clade | style=font-size:90%;line-height:80%
|label1=Peramelemorphia
|1={{clade
  |1={{clade
  |label1=[[Thylacomyidae]]
  |1=''[[Macrotis]]''
     }}
  |2={{clade
    |label1=†Chaeropodidae
    |1=''[[Pig-footed bandicoot|Chaeropus]]''
    |label2=[[Peramelidae]]
    |2={{clade
      |1={{clade
      |label1=[[Peramelinae]]
      |1={{clade
        |1=''[[Isoodon]]''
        |2=''[[Perameles]]''
         }}
         }}
      |2={{clade
        |label1=[[Echymiperinae]]
        |1={{clade
          |1=''[[Echymipera]]''
          |2=''[[Microperoryctes]]''
           }}
        |label2=[[Peroryctinae]]
        |2=''[[Peroryctes]]''
         }}
       }}
     }}
   }}
}}
|
{{Clade | style=font-size:90%;line-height:80%
|1={{clade
  |1={{clade
  |label1=[[Thylacomyidae]]
  |1=''[[Macrotis]]''
     }}
  |2={{clade
    |1=''[[Rhynchomeles]]''
    |2={{clade
    |label1=[[Peramelidae]]
    |1={{clade
      |1={{clade
      |label1=[[Peramelinae]]
      |1={{clade
        |1=''[[Isoodon]]''
        |2=''[[Perameles]]''
         }}
         }}
      |2={{clade
        |label1=[[Peroryctinae]]
        |1=''[[Peroryctes]]''
        |label2=[[Echymiperinae]]
        |2={{clade
          |1=''[[Echymipera]]''
          |2=''[[Microperoryctes]]''
           }}
         }}
       }}
       }}
     }}
   }}
}}
|
{{Clade | style=font-size:90%;line-height:80%
|1={{clade
  |1={{clade
  |label1=[[Thylacomyidae]]
  |1=''[[Macrotis]]''
     }}
  |2={{clade
  |label1=[[Peramelidae]]
  |1={{clade
    |1={{clade
    |label1=[[Peramelinae]]
    |1={{clade
      |1=''[[Isoodon]]''
      |2=''[[Perameles]]''
       }}
       }}
    |2={{clade
      |label1=[[Peroryctinae]]
      |1=''[[Peroryctes]]''
      |label2=[[Echymiperinae]]
      |2={{clade
        |1=''[[Echymipera]]'' [incl. ''[[Rhynchomeles]]'']
        |2=''[[Microperoryctes]]''
         }}
       }}
     }}
     }}
   }}
}}
|}

==Fossil record==
Many specimens of modern peramelemorphian (e.g. ''Perameles'' spp. and ''Isoodon'' spp.) have been recovered in the fossil record from [[Pleistocene]] and [[Holocene]] fossil localities.<ref>Rich, T. H, Archer, M., Hand, S. J., Godthelp, H., Muirhead, J., Pledge, N. S., Flannery, T. F., Woodburne, M. O., Case, J. A., Teford, R. H., Turnbull, W. D., Lundelius, E. L.jr., Rich, L. S. V., Whitelaw, M. J., Kemp, A., & Rich, P. V. 1991. Australian Mesozoic and Tertiary terrestrial mammal localities, Appendix 1. Pp. 1005-1058 in P. Vickers-Rich, Monaghan J. M., R. F. Baird & T. H. Rich (eds), Vertebrate Palaeontology of Australia. Pioneer Design Studio and Monash University Publications Committee, Melbourne.</ref> However, very few fossil species have been recovered to date. The first species of fossil peramelemorphian was described by [[R. A. Stirton]] in 1955. The specimen Stirton described was a partial lower jaw from the [[Tirari Desert]] in Central Australia, [[Pliocene]] in age. The lower jaw morphology suggested a relationship with bilbies (Family Thylacomyidae), and was named ''Ischnodon australis''.<ref>Stirton, R. A. 1955. Late Tertiary marsupials from South Australia. ''Records of the South Australian Museum'', 11, 247– 267.</ref>

It was not until 1976 that Archer and Wade described the next fossil bandicoot. A single upper molar was recovered from the [[Bluff Downs fossil site]], Allingham Formation, in northern [[Queensland]], also Pliocene in age. The tooth was similar to that of species of ''Perameles'', and was therefore named ''[[Perameles allinghamensis]]''.<ref>Archer, M. & Wade, M. 1976. Results of the Ray E. Lemley expeditions, part 1: The Allingham Formation and a new Pliocene vertebrate fauna from northern Queensland. ''Memoirs of the Queensland Museum'', 17, 54–58.</ref>

In 1995, the first [[Miocene]] species was described from [[Australian Fossil Mammal Sites (Riversleigh)|Riversleigh]], and was named ''[[Yarala|Yarala burchfieldi]]'' by Dr Jeannette Muirhead. The species was represented by several upper and lower jaws, which were smaller than any living bandicoots and had a very primitive dentition.<ref>Muirhead, J. & Filan, S. L. 1995. ''Yarala burchfieldi'', a plesiomorphic bandicoot (Marsupialia, Peramelemorphia) from Oligo-Miocene deposits of Riversleigh, northwestern Queensland. ''Journal of Paleontology'', 69(1), 127-134.</ref> A skull was later recovered in 2000, the first for any fossil peramelemorphian to date. Features of the skull and dentition suggested that ''Yarala burchfieldi'' was distinct from other peramelemorphians, and for this reason, a new Superfamily [[Yaraloidea]] and Family [[Yaralidae]] were erected to classify this species.<ref>Muirhead, J. 2000. Yaraloidea (Marsupialia, Peramelemorphia), a new superfamily of marsupial and a description and analysis of the cranium of the Miocene ''Yarala burchfieldi''. ''Journal of Paleontology'', 74(3), 512-523.</ref>

In 1997, Muirhead, Dawson and Archer described a new species of ''Perameles'', ''[[Perameles bowensis]]'', from teeth recovered from two Pliocene fossil localities, Bow and [[Wellington Caves]].<ref>Muirhead, J., Dawson, L. & Archer, M. 1997. Perameles bowensis, a new species of Perameles (Peramelomorphia, Marsupialia) from Pliocene faunas of Bow and Wellington caves, New South Wales. ''Proceedings of the Linnean Society of New South Wales'', 17, 163–174.</ref> The same species was later reported in 2000 from [[Chinchilla, Queensland]], by Mackness and colleagues.<ref>Mackness, B. S., Wroe, S., Muirhead, J., Wilkinson, C. & Wilkinson, D. 2000. First fossil bandicoot from the Pliocene Chinchilla Local Fauna. ''Australian Mammalogy'', 22, 133– 136.</ref> In 2002, Price described a new species ''[[Perameles]]'', ''[[Perameles|Perameles sobbei]]'', from the [[Darling Downs]] (Pleistocene in age), south-eastern Queensland. This species was represented by a lower jaw and a few isolated lower molars.<ref>Price, G. J. 2002. ''Perameles sobbei'', sp. nov. (Marsupialia, Peramelidae), a Pleistocene bandicoot from the Darling Downs, south-eastern Queensland. ''Memoirs of the Queensland Museum'', 48, 193-197.</ref> Additional material were later described in 2005 from the same site, including upper molars.<ref>Price, G. J. 2005. Fossil bandicoots (Marsupialia, Peramelidae) and environmental change during the Pleistocene on the Darling Downs, southeastern Queensland, Australia. ''Journal of Systematic Palaeontology'', 4, 347-356.</ref>

A second species of ''Yarala'', ''Yarala kida'', was described in 2006 by Schwartz. This species was recovered from Kangaroo Well, a late [[Oligocene]] site from the [[Northern Territory]] in Australia. This species is thought to be even more primitive than ''Yarala burchfieldi''.<ref>Schwarz, L. R. S. 2006. A new species of bandicoot from the Oligocene of northern Australia and implications of bandicoots for correlating Australian Tertiary mammal faunas. ''Palaeontology'',  49, 991–998.</ref>

The second fossil skull of any fossil peramelemorphian was also recovered from Miocene sites of Riversleigh. In fact, more than one skull of this new species was found (and several lower and upper jaws), and was significantly different from any other bandicoot to erect a new genus, ''[[Galadi]]''. The species was named ''Galadi speciosus'' by Travouillon and colleagues. It was short-snouted unlike modern bandicoots suggesting that it was more carnivorous than its omnivorous modern relatives. Its relationship to other bandicoots is unclear, but it was likely to be less primitive than ''Yarala'' but more primitive than living bandicoots.<ref>K.J. Travouillon; Y. Gurovich; R.M.D. Beck; J. Muirhead (2010). "An exceptionally well-preserved short-snouted bandicoot (Marsupialia; Peramelemorphia) from Riversleigh's Oligo-Miocene deposits, northwestern Queensland, Australia". ''Journal of Vertebrate Paleontology'' 30 (5): 1528–1546. doi:10.1080/02724634.2010.501463</ref> An additional three species of ''Galadi'' were later described in 2013 and named ''Galadi grandis'', ''Galadi amplus'' and ''Galadi adversus''.<ref>K. J. Travouillon, Y. Gurovich, M. Archer, S. J. Hand and J. Muirhead (2013). "The genus ''Galadi'': three new bandicoots (Marsupialia, Peramelemorphia) from Riversleigh’s Miocene deposits, northwestern Queensland, Australia". ''Journal of Vertebrate Paleontology'' 33 (1): 153–168. doi:10.1080/02724634.2012.713416</ref>

Gurovich et al. (2013) described a new species of mouse-sized bandicoot from Riversleigh and from Kutjamarpu, Southern Australia. The species, named ''[[Bulungu (genus)|Bulungu palara]]'', is represented by a skull and several lower and upper jaws.<ref>Gurovich, Y., Travouillon, K.J., Beck, R.M.D., Muirhead, J., Archer, M., 2013. Biogeographical implications of a new mouse-sized fossil bandicoot (Marsupialia: Peramelemorphia) occupying a dasyurid-like ecological niche across Australia. Journal of Systematic Palaeontology.</ref> Two other species in this [[genus]] were also described from the Etadunna Formation in South Australia, ''Bulungu muirheadae'' which was the oldest fossil bandicoot recovered as of 2013 (about 24 million years old), and ''Bulungu campbelli''.<ref name=Travouillon2013>{{cite journal | author = Travouillon, K.J., Beck, R.M.D., Hand, S.J., Archer, M. | year = 2013 | title = The oldest fossil record of bandicoots (Marsupialia; Peramelemorphia) from the late Oligocene of Australia | journal = Palaeontologia Electronica | volume = 16 | issue = 2 | url=http://palaeo-electronica.org/content/2013/400-late-oligocene-bandicoot | pages = 13A 52p }}</ref>

The oldest modern bandicoot (peramelid) and the oldest bilby (Thylacomyid) were later discovered by Travouillon et al., 2014 from Riversleigh World Heritage Area, from middle Miocene fossil deposits (around 15 million years old). The peramelid, ''[[Crash (genus)|Crash bandicoot]]'', was named after the famous video game character and is only represented by a single upper jaw. The bilby, ''[[Liyamayi(genus)|Liyamayi dayi]]''named after geologist and philanthropist Robert Day, is only known from 3 teeth (2 upper molar, 1 lower molar).<ref>Travouillon, K.J., Hand, S. J., Archer, M., and Black, K. H., 2014. Earliest modern bandicoot and bilby (Marsupialia, Peramelidae and Thylacomyidae) from the Miocene of the Riversleigh World Heritage Area, northwestern Queensland, Australia. ''Journal of Vertebrate Paleontology'' 34:375-382.</ref>

The first record of sexual dimorphism (difference in size between males and females) in a fossil bandicoot was reported from two new species from Riversleigh (Travouillon et al. 2014). Named ''[[Madju (genus)|Madju variae]]'' and ''[[Madju (genus)|Madju encorensis]]'', they are closely related to modern bandicoots, but do not fall in any modern family, as did ''[[Galadi]]'' and ''[[Bulungu (genus)|Bulungu]]''. Instead they are classified as Perameloid, with all known Peremelemorphian, to the exclusion of yaralids. ''[[Madju (genus)|Madju variae]]'' is also unusual in preserving an ontogenetic series (age series from pouch young to adult), the second of any fossil marsupial mammal in Australia. The study of this ontogenetic series lead researchers to think that ''[[Madju (genus)|Madju variae]]'' developed slow than modern bandicoots, much more like a bilby, and therefore the rapid development of modern bandicoots must have evolved after the middle Miocene, when Australia started to become more arid.<ref>Travouillon, K. J., Archer, M., Hand, S. J. and Muirhead, J., 2014. Sexually dimorphic bandicoots (Marsupialia: Peramelemorphia) from the Oligo-Miocene of Australia, first cranial ontogeny for fossil bandicoots and new species descriptions. ''Journal of Mammalian Evolution''. doi:10.1007/s10914-014-9271-8</ref>

==See also==
* [[List of mammal genera]]
* [[List of recently extinct mammals]]
* [[List of prehistoric mammals]]

== References ==
{{Commons category}}
{{Portal|Mammals|Prehistoric mammals}}
{{Reflist}}
*{{MSW3 Groves|pages=38-42}}
** [https://www.departments.bucknell.edu/biology/resources/msw3/browse.asp?id=10900001 Peramelemorphia]

{{Mammals}}
{{Peramelemorphia}}

{{Taxonbar|from=Q244587}}
{{Authority control}}

[[Category:Peramelemorphs| ]]
[[Category:Mammal orders]]
[[Category:Extant Chattian first appearances]]
[[Category:Taxa named by Florentino Ameghino]]