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Towards an Understanding of Marsupial Interchange between Australia and New Guinea.

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Title: Towards an Understanding of Marsupial Interchange between Australia and New Guinea.
Authors: FLANNERY, TIM F.1 tim.fridtjof.flannery@gmail.com, KOUNGOULOS, LOUKAS G.1, ELDRIDGE, MARK D. B.1
Source: Records of the Australian Museum. 2026, Vol. 78 Issue 1, p77-86. 10p.
Subjects: Structural geology, Continents, Miocene Epoch, Pliocene Epoch, Dispersal (Ecology), Genetic speciation, Islands
Geographic Terms: New Guinea (Island), Australia
Abstract: A review of the geology, palaeontology, genetic, and morphology studies indicates that during the mid-Miocene to Pliocene, New Guinea consisted of four island Blocks (Vogelkop, Maokop, Central, and Southeastern). The initial dispersal of marsupials from Australia was into the Vogelkop Block. The ancestors of at least six genera (Dactylonax, Microperorytes, Myoictis Pseudochirops, Spilocuscus, Tous) and three species (Dendrolagus inustus, Dendrolagus ursinus, Dorcopsis muelleri) of endemic New Guinean marsupials are likely to have reached New Guinea via this route. The Dendrolagus dorianus complex and two marsupial genera (Dactylopsila and Phalanger) may have reached New Guinea via the Maokop Block, with Thylogale arriving either via the Maokop or Southeastern Block. Four species, or species complexes, of marsupials in the genera Dendrolagus, Dorcopsis, Murexia, and Peroryctes may have arrived via the Southeastern Block. The Central Block lacks evidence of Tertiary marsupial transfers from Australia, and may not have been connected with Australia prior to its incorporation into New Guinea. Two possum taxa (Tous ayamaruensis and Dactylonax kambuayai), which occur in the Vogelkop lowlands, are hypothesized to have been restricted from expansion into the slopes of the Central Cordillera by a combination of tectonics and ecological barriers. A further two species pairs/triplets (Dactylonax palpator/ernstmayri, Pseudochirops albertisii/coronatus/cupreus) provide evidence of a highly unusual pattern of dispersal within New Guinea, whereby the high-elevation members of each pair have dispersed and speciated, while the mid-elevation members have not. Finally, marsupial distributions indicate that in the early Pleistocene a contiguous mountain range, named here the Northern Cordillera, extended from Vogelkop to the Torricelli Mountains. [ABSTRACT FROM AUTHOR]
Copyright of Records of the Australian Museum is the property of Australian Museum and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Towards an Understanding of Marsupial Interchange between Australia and New Guinea.
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  Data: <searchLink fieldCode="AR" term="%22FLANNERY%2C+TIM+F%2E%22">FLANNERY, TIM F.</searchLink><relatesTo>1</relatesTo><i> tim.fridtjof.flannery@gmail.com</i><br /><searchLink fieldCode="AR" term="%22KOUNGOULOS%2C+LOUKAS+G%2E%22">KOUNGOULOS, LOUKAS G.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22ELDRIDGE%2C+MARK+D%2E+B%2E%22">ELDRIDGE, MARK D. B.</searchLink><relatesTo>1</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Records+of+the+Australian+Museum%22">Records of the Australian Museum</searchLink>. 2026, Vol. 78 Issue 1, p77-86. 10p.
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  Data: A review of the geology, palaeontology, genetic, and morphology studies indicates that during the mid-Miocene to Pliocene, New Guinea consisted of four island Blocks (Vogelkop, Maokop, Central, and Southeastern). The initial dispersal of marsupials from Australia was into the Vogelkop Block. The ancestors of at least six genera (Dactylonax, Microperorytes, Myoictis Pseudochirops, Spilocuscus, Tous) and three species (Dendrolagus inustus, Dendrolagus ursinus, Dorcopsis muelleri) of endemic New Guinean marsupials are likely to have reached New Guinea via this route. The Dendrolagus dorianus complex and two marsupial genera (Dactylopsila and Phalanger) may have reached New Guinea via the Maokop Block, with Thylogale arriving either via the Maokop or Southeastern Block. Four species, or species complexes, of marsupials in the genera Dendrolagus, Dorcopsis, Murexia, and Peroryctes may have arrived via the Southeastern Block. The Central Block lacks evidence of Tertiary marsupial transfers from Australia, and may not have been connected with Australia prior to its incorporation into New Guinea. Two possum taxa (Tous ayamaruensis and Dactylonax kambuayai), which occur in the Vogelkop lowlands, are hypothesized to have been restricted from expansion into the slopes of the Central Cordillera by a combination of tectonics and ecological barriers. A further two species pairs/triplets (Dactylonax palpator/ernstmayri, Pseudochirops albertisii/coronatus/cupreus) provide evidence of a highly unusual pattern of dispersal within New Guinea, whereby the high-elevation members of each pair have dispersed and speciated, while the mid-elevation members have not. Finally, marsupial distributions indicate that in the early Pleistocene a contiguous mountain range, named here the Northern Cordillera, extended from Vogelkop to the Torricelli Mountains. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Records of the Australian Museum is the property of Australian Museum and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.3853/j.2201-4349.78.2026.3007
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        Text: English
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      – SubjectFull: Miocene Epoch
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      – SubjectFull: Genetic speciation
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      – SubjectFull: Islands
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      – SubjectFull: New Guinea (Island)
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