古脊椎动物学报2010，Vol.48Issue(4)：336-347,12.
"假磨楔式":一个概念的发展历史
PSEUDOTIUBOSPHENIC:THE HISTORY OF A CONCEPT
Thomas H.RICH 1Patricia VICKERS-RICH2
作者信息
- 1. 澳大利亚维多利亚博物馆,墨尔本,3001
- 2. 澳大利亚莫纳什大学地球科学学院,克莱顿,3128
- 折叠
摘要
Abstract
Palaeontology is for the most part a postdictive science.That is,its central task is for the most part to explain existing data.A rare instance of palaeontology being a predictive science is to be found in the history of the development of the pseudotribosphenic concept.Based on the structure of the lower molars in a single dentary of a pseudotribosphenic mammal,the structure of the then unknown upper molars Was hypothesized.The subsequent discovery first of an isolated upper molar regarded as likely to be a pseudotribosphenic mammal and later,a specimen of a pseudotribosphenic mammal with its upper and lower molars in occlusion,rigorously corroborated the original hypothesis.The acceptance of the pseudontribosphenic concept was instrumentaI in the recognition that the tribosphenic condition,a key innovation in the history of mammals,could well have arisen more than once,despite its complexity.Living languages evolve through time.As the term "pseudotribosphenic" was utilised after being originally coined,its usage by some subsequent workers departed significantly from the original concept.The term has been used both to describe teeth of docodonts which do not occlude in the pseudotribosphenic manner as originally defined as well as teeth that were clearly tribosphenic as that term Was originally defined rather than pseudotribosphenic.As a result,its definition as understood by the paleontological community became less precise,and thus the utility of the concept was significantly reduced.Consequently,a return to the original definition would be appropriate.关键词
中生代/哺乳动物/进化/平行演化/磨楔式Key words
Mesozoic/Mammalia/evolution/parallelism/tribosphenic分类
生物科学引用本文复制引用
Thomas H.RICH,Patricia VICKERS-RICH.."假磨楔式":一个概念的发展历史[J].古脊椎动物学报,2010,48(4):336-347,12.
