Extraordinary diphyodonty-related change in dental function for a tooth of the extinct marsupial Ekaltadeta ima (Propleopinae, Hypsiprymnodontidae).

Abstract:

:A time-dependent, fundamental change in function for a sectorial tooth in a group of extinct, propleopine kangaroos is reported. In juvenile Ekaltadeta ima (Marsupialia, Hypsiprymnodontidae, Propleopinae) the second premolar (P2) functions as a serrated blade at the anterior end of the cheek tooth row. In adults, this tooth drops far below the occlusal plane of the cheek tooth row where it assumes a completely different function, that of a buttress, anterolingual to the base of the crown of the much larger, newly erupted third premolar (P3). This pattern of diphyodonty-related change in dental function is unique within Mammalia. It also represents an extraordinary example of biological recycling of a normally discarded tooth.

journal_name

Arch Oral Biol

journal_title

Archives of oral biology

authors

Wroe S,Archer M

doi

10.1016/0003-9969(95)00010-m

subject

Has Abstract

pub_date

1995-07-01 00:00:00

pages

597-603

issue

7

eissn

0003-9969

issn

1879-1506

pii

0003-9969(95)00010-M

journal_volume

40

pub_type

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