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species Concepts as Applied to the Whitefly Bemisia tabaci Systematics:How Many species Are There?

Journal of Integrative Agriculture 2012年第2期11卷 176-186页

作者： LIU Shu-sheng John Colvin Paul J De Barro Key Laboratory of Agricultural Entomology Ministry of Agriculture~Institute of lnsect Sciences Zhejiang University Hangzhou 310058 P.R. China Natural Resources Institute University of Greenwich Kent ME4 4TB United Kingdom CSIRO Ecosystem Sciences Brisbane QLD 4001 Australia

The worldwide distribution and extensive genetic diversity of the whitefly,Bemisia tabaci,has long been ***,the levels of separation within *** and the nomenclature of the various genetic groups have been a subject of *** phylogenetic analyses indicate that *** is a complex composed of 28 morphologically indistinguishable *** this article,we first review the debate and difficulties associated with ***＇s taxonomy and systematics,and argue for the need to apply the biological species concept in order to elucidate ***＇s *** summarize the accumulated genetic and behavioural data on reproductive incompatibilities evident amongst phylogenetic mtCOI groups of *** studies have been conducted with 14 of the 28 putative species covering 54 reciprocal inter-species pairs,and observations on mating behaviour have been conducted for seven species *** from both crossing trials and behavioural observations indicate a consistent pattern of reproductive isolation among the putative *** then discuss the technical and conceptual complexities associated with crossing experiments and behavioural observations designed to reveal reproductive ***,we elaborate on a strategy for further clarifying the pattern of reproductive isolation between *** groups and propose future research directions on the systematics of this complex.

关键词： whitefly systematics biological species cryptic species phylogenetic species reproductive isolation mating behavior taxonomy

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Fusulinid species determination based on population variation:An example from Eopolydiexodina

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Science China Earth Sciences 2011年第10期54卷 380-387页

作者： HUANG Hao Institute of Geology Chinese Academy of Geological Sciences Beijing 100037 China

To make fusulinid morphospecies more accordant with biological species, it is necessary and reasonable to constrain the conventional determination of fusulinid species with population-level morphological variation. As an example, morphospecies identification on population level was conducted on Eopolydiexodina specimens from a single bed of the Middle Permian Shazipo Formation of Xiaoxinzhai Section in western Yunnan, China. These specimens were identified with the consideration of fossil population by morphometric analysis of their characteristic morphological variates (diameter of proloculus, size and ratio of inner and outer volutions). The results reveal that the studied variates have wide but overall continuous variation and generally follow the normal distribution. The studied individuals, therefore, have consistent morphological variation with a single population and should belong to one fusulinid morphospecies. This study supports the assumption that fusulinid individuals of one genus from the same bed in one locality should constitute a single fossil population.

关键词： population morphospecies biological species Eopolydiexodina fusulinid

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