Further Ektopodontidae (Phalangeroidea, Mammalia) from southwestern Victoria

Rich, Thomas H.; Piper, Katarzyna J.; Pickering, David; Wright, S

doi:10.1080/03115510608619349

Cited by 8 publications

(8 citation statements)

References 7 publications

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“…The age of the Riversleigh ektopodontid has been interpreted by Archer et al (1989) to be most probably Early Miocene. The youngest reported Ektopodon is E. paucicristata (Rich et al, 2006) from the Pliocene Whalers Bluff Formation (Dutton Way, Portland) and Childers Cove of southwestern Victoria. This species is a temporal anomaly, in so far as its authors regarded it to be relatively plesiomorphic.…”

Section: Discussionmentioning

confidence: 99%

“…Species of Chunia range in age from Late Oligocene (Ditjimanka LF) to latest Oligocene (Tarkarooloo LF) in age. Darcius duggani (Rich, 1986) is known from the Early Pliocene Hamilton LF, and from the apparently early Pleistocene Nelson Bay Formation (Rich et al, 2006), both in southwestern Victoria. Rich (1986) regards D. duggani to be structurally intermediate between the species of Chunia and Ektopodon.…”

Section: Discussionmentioning

confidence: 99%

“…Rich (1986) described Darcius duggani from Hamilton, western Victoria, a deposit radiometrically determined to be Pliocene in age (ca. 4.46 Ma), and E. paucicristata from Pliocene sediments near Portland, also in western Victoria (Rich et al, 2006). By 1986 the rich deposits of Riversleigh, northwestern Queensland, were beginning to yield many new species including an unidentifiable ektopodontid, and a second species of Ektopodon was found in the Kutjamarpu Local Fauna of South Australia (Pledge et al 1999).…”

Section: Introductionmentioning

confidence: 99%

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New specimens of ektopodontids (Marsupialia: Ektopodontidae) from South Australia

Pledge¹

2016

MMV

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Knowledge about the extinct phalangeroid family Ektopodontidae is increased by the discovery of new material from several localities. Previously unknown teeth of Chunia illuminata and Ektopodon stirtoni are described respectively from White Sands Basin and Mammalon Hill, Lake Palankarinna, Lake Eyre Basin, South Australia, with M 1 being recorded for the first time for any species of Chunia., and a full maxilla of Ektopodon stirtoni showing the positional relationship between P3 and M1 for the first time; this is even more extreme than the arrangement postulated previously. Another species Ektopodon litolophus has been described on the basis of an M 1 found at the Leaf Locality, Lake Ngapakaldi, Lake Eyre Basin. Material from Lake Tarkarooloo, referred to Ektopodon stirtoni, is redescribed as a new species Ektopodon tommosi. Comparisons of M 1 of Chunia and Ektopodon species now allow evolutionary trends, such as increasing number of cusps on the molar lophs, and simplification of the cusps, to be discerned.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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New specimens of ektopodontids (Marsupialia: Ektopodontidae) from South Australia

Pledge¹

2016

MMV

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“…Oligocene Chunia sp. in Archer et al (2006) Dirk's Towers and Upper Site, FZ B, Riversleigh E. Miocene (18.2-16.5 Ma) Darcius duggani Rich, 1986 Hamilton LF and Nelson Bay Formation, southwestern Victoria (Rich et al, 2006) E. Pliocene-?E. Pleistocene Darcius-like form in Long et al (2002), reported as a new genus by Crosby et al (1999) and Archer et al (2006) Creaser's Ramparts and Neville's Garden, FZ B Riversleigh E. Miocene (18.2-16.5 Ma) Ektopodon tommosi Pledge, 2016 Tarkarooloo LF, Namba Fm L. Oligocene (≥ 24.1 Ma) Ektopodon stirtoni Pledge, 1986 Mammalon Hill, Lake Palankarinna, Etadunna Fm L. Oligocene (24.1 Ma) Ektopodon ulta Megirian, Murray, Schwartz and Von Der Borch, 2004 Kangaroo Well LF E. Miocene Ektopodon serratus Stirton, Tedford and Woodburne, 1967 Kutjamarpu LF, Wipajiri Fm E. Miocene Ektopodon sp.…”

Section: Taxon Distribution Agementioning

confidence: 99%

“…cf. E. serratus in Pledge et al (1999) Wayne's Wok LF, FZ B, Riversleigh E. Miocene (18.2-16.5 Ma) Ektopodon litolophus Kutjamarpu LF, Wipajiri Fm E. Miocene Ektopodon paucicristata Rich, Piper, Pickering and Wright, 2006 Childers Cove and Dutton Way, Whalers Bluff Fm ?Pliocene lingually displaced precingulid (similar to that of Djilgaringa gillespiei Archer, Tedford and Rich, 1987). Given that structural homology cannot be unambiguously demonstrated we opt to be conservative and refer to the primary protolophid cuspids on m1 only by their relative position number.…”

Section: Taxon Distribution Agementioning

confidence: 99%

A new ektopodontid possum (Diprotodontia, Ektopodontidae) from the Oligocene of central Australia, and its implications for phalangeroid interrelationships

Crichton

Worthy

Camens

et al. 2022

Journal of Vertebrate Paleontology

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The Ektopodontidae are an enigmatic group of phalangeroid marsupials known from the late Oligocene to the Early Pleistocene of Australia. Although represented to date only by isolated teeth and several partial dentaries and maxillae, their highly distinctive dental morphology has allowed three genera and nine species to be distinguished. Here, we describe possibly the geologically oldest ektopodontid, Chunia pledgei sp. nov., from the Oligocene Pwerte Marnte Marnte fossil locality of central Australia. Phylogenetic analyses of Phalangeroidea, using 80 primarily dental characters framed by a molecular scaffold, support placement of the new taxon in the genus Chunia. The analyses failed to recover species of the genus Durudawiri in a monophyletic Miralinidae, indicating that they require systematic review. We also transfer the purported basal phalangerid Eocuscus sarastamppi to Miralinidae (Miralina sarastamppi comb. nov.). Additionally, the M1 specimens used to describe the Early to Middle Miocene miralinid genus Barguru, and three species therein, are reidentified as deciduous third premolars from early macropodoids. These findings imply that the Miralinidae are known only from the late Oligocene, whereas the oldest named phalangerids are from the Early Miocene. From a functional consideration of ektopodontid dental morphology, we infer support for prior suggestions of a granivorous and/or frugivorous diet for them. The relative stage-of-evolution expressed by the new taxon is comparable to those in the lower faunal zones of the Namba and Etadunna formations, which supports a late Oligocene age for the Pwerte Marnte Marnte assemblage. http://zoobank.org/urn:lsid:zoobank.org:pub:8881FF3A-4B9F-4085-A5C2-1BBF976CFB65 SUPPLEMENTAL DATA-Supplemental materials are available for this article for free at www.tandfonline.com/UJVP.

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The Rise of Australian Marsupials: A Synopsis of Biostratigraphic, Phylogenetic, Palaeoecologic and Palaeobiogeographic Understanding

et al. 2012

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Further Ektopodontidae (Phalangeroidea, Mammalia) from southwestern Victoria

Cited by 8 publications

References 7 publications

New specimens of ektopodontids (Marsupialia: Ektopodontidae) from South Australia

New specimens of ektopodontids (Marsupialia: Ektopodontidae) from South Australia

A new ektopodontid possum (Diprotodontia, Ektopodontidae) from the Oligocene of central Australia, and its implications for phalangeroid interrelationships

The Rise of Australian Marsupials: A Synopsis of Biostratigraphic, Phylogenetic, Palaeoecologic and Palaeobiogeographic Understanding

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