Please use this identifier to cite or link to this item:
Type: Journal article
Title: Miocene mammal reveals a Mesozoic ghost lineage on insular New Zealand, southwest Pacific
Author: Worthy, Trevor Henry
Tennyson, Alan J. D.
Archer, Michael
Musser, Anne M.
Hand, Suzanne J.
Jones, Craig
Douglas, Barry J.
McNamara, James A.
Beck, Robin M. D.
Citation: Proceedings of the National Academy of Sciences of the United States of America, 2006; 103(51):19419-19423
Publisher: National Academy of Sciences
Issue Date: 2006
ISSN: 0027-8424
School/Discipline: School of Earth and Environmental Sciences
Statement of
Trevor H. Worthy, Alan J. D. Tennyson, Michael Archer, Anne M. Musser, Suzanne J. Hand, Craig Jones, Barry J. Douglas, James A. McNamara and Robin M. D. Beck
Abstract: New Zealand (NZ) has long been upheld as the archetypical example of a land where the biota evolved without nonvolant terrestrial mammals. Their absence before human arrival is mysterious, because NZ was still attached to East Antarctica in the Early Cretaceous when a variety of terrestrial mammals occupied the adjacent Australian portion of Gondwana. Here we report discovery of a nonvolant mammal from Miocene (19-16 Ma) sediments of the Manuherikia Group near St Bathans (SB) in Central Otago, South Island, NZ. A partial relatively plesiomorphic femur and two autapomorphically specialized partial mandibles represent at least one mouse-sized mammal of unknown relationships. The material implies the existence of one or more ghost lineages, at least one of which (based on the relatively plesiomorphic partial femur) spanned the Middle Miocene to at least the Early Cretaceous, probably before the time of divergence of marsupials and placentals >125 Ma. Its presence in NZ in the Middle Miocene and apparent absence from Australia and other adjacent landmasses at this time appear to reflect a Gondwanan vicariant event and imply persistence of emergent land during the Oligocene marine transgression of NZ. Nonvolant terrestrial mammals disappeared from NZ some time since the Middle Miocene, possibly because of late Neogene climatic cooling.
Keywords: Gondwana ; Miocene ; nontherian mammal ; vicariant event
Rights: © 2006 National Academy of Sciences.
Published version:
Appears in Collections:Earth and Environmental Sciences publications

Files in This Item:
There are no files associated with this item.

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.