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Temporal range: Eocene - Holocene, 56–0.003 Ma PreꞒ O S D C P T J K Pg NMekosuchinae_header_cell_0_0_0

Scientific classification MekosuchinaeMekosuchinae_header_cell_0_1_0
Kingdom:Mekosuchinae_cell_0_2_0 AnimaliaMekosuchinae_cell_0_2_1
Phylum:Mekosuchinae_cell_0_3_0 ChordataMekosuchinae_cell_0_3_1
Class:Mekosuchinae_cell_0_4_0 ReptiliaMekosuchinae_cell_0_4_1
Order:Mekosuchinae_cell_0_5_0 CrocodiliaMekosuchinae_cell_0_5_1
Family:Mekosuchinae_cell_0_6_0 CrocodylidaeMekosuchinae_cell_0_6_1
Subfamily:Mekosuchinae_cell_0_7_0 †Mekosuchinae

Willis, Molnar & Scanlon, 1993Mekosuchinae_cell_0_7_1

Type speciesMekosuchinae_header_cell_0_8_0

Mekosuchinae is an extinct subfamily of crocodylids from Australia and the South Pacific. Mekosuchinae_sentence_0

They first appear in the fossil record in the Eocene in Australia, and survived until the arrival of humans: in the Pleistocene in Australia and within the Holocene in the Pacific islands of Fiji, New Caledonia and Vanuatu. Mekosuchinae_sentence_1

There is however disagreement on whether or not Mekosuchinae is a true subfamily within Crocodylidae, or a distinct crocodilian family in its own right, Mekosuchidae, within the superfamily Crocodyloidea. Mekosuchinae_sentence_2

Mekosuchine crocodiles are a diverse group. Mekosuchinae_sentence_3

One of the last species, Mekosuchus inexpectatus from Holocene New Caledonia, may have been arboreal. Mekosuchinae_sentence_4

The early Miocene species, Harpacochampsa camfieldensis, may have resembled a false gharial. Mekosuchinae_sentence_5

Another mekosuchine fossil, currently undescribed, has been found in Miocene deposits from New Zealand. Mekosuchinae_sentence_6

One genus, Mekosuchus, managed to spread to the islands of the Pacific; it is believed to have island-hopped across the Coral Sea, moving first to a now submerged island known as Greater Chesterfield Island, then New Caledonia and onwards. Mekosuchinae_sentence_7

In the Pleistocene, Quinkana was one of the top terrestrial predators of the Australian continent. Mekosuchinae_sentence_8

Mekosuchines underwent a drastic decline in post-Miocene Australia, with all genera, except for Quinkana and Pallimnarchus (both perishing during the Quaternary extinction event) becoming extinct in Australia by the end of the Pliocene. Mekosuchinae_sentence_9

After the demise of Quinkana and Pallimnarchus, the group survived on Vanuatu and New Caledonia until the arrival of humans, who are presumed to have driven them to extinction. Mekosuchinae_sentence_10

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