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Investigating Heterochrony in the Fossil Record: A Geochemical, Morphometric, and Phylogenetic Study of Thecideidina (Brachiopoda), Triassic-Recent.

Investigating Heterochrony in the Fossil Record: A Geochemical, Morphometric, and Phylogenetic Study of Thecideidina (Brachiopoda), Triassic-Recent.
调查化石记录中的异时性:三叠纪-近代 Thecideidina(腕足动物)的地球化学、形态测量和系统发育研究。
批准号:
9902984
负责人:
Sandra Carlson
金额:
$16.34万
依托单位国家:
美国
项目类别:
Continuing Grant
财政年份:
1999
资助国家:
美国
项目状态:
已结题
起止时间:
1999-08-01 至 2004-01-31

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英文摘要
9902984CarlsonHeterochrony, the evolutionary consequences of changes in the rate and timing of development, is considered to be one of the most important means by which evolution occurs. Documenting heterochrony fully requires knowledge of growth rates, phylogenetic relationships, and ontogenetic size and shape change for putative ancestors and descendants. The goal of this study is to understand the role of heterochrony in the origin and evolution of thecideidine brachiopods, a poorly understood group of small, benthic, cemented, pan-tropical, cryptic invertebrates with a long fossil record (Triassic - Recent) and novel morphologies. We will use parsimony-based, morphologic phylogenetic methods to develop robust hypotheses of relationship among thecideidine species and genera, and of thecideidines to other articulated brachiopods. We will document thecideidine growth rates by analyzing the oxygen isotopic composition of microsamples of successive shell growth layers, to quantify size-age-growth relationships throughout ontogeny. Finally, we will utilize multivariate morphometric methods to chronicle shape change that accompanies ontogenetic size increase and characterizes the range of observed adult morphologies. Phylogenetic, geochemical, and morphometric results will be combined to test whether, and in what ways, heterochrony is responsible for the origin and evolution of thecideidines. The results of this study will provide a rare, rigorous test of heterochrony in the fossil record by accounting for all three primary components: phylogenetic relationship, growth rate, and shape and size change.
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Collaborative Research: EAGER: The early evolution of lamp shells and relatives (brachiopods) using an integrated approach combining genomics and fossils
  • 批准号:
    1747704
  • 项目类别:
    Standard Grant
  • 资助金额:
    $7.95万
  • 财政年份:
    2017
  • 负责人:
    Sandra Carlson
  • 依托单位:
Morphology: how does it vary and what does it reveal about evolution? Ontogenetic and phylogenetic variation in extant brachiopod crura and loops
  • 批准号:
    1147537
  • 项目类别:
    Continuing Grant
  • 资助金额:
    $22.86万
  • 财政年份:
    2012
  • 负责人:
    Sandra Carlson
  • 依托单位:
The UC Davis Robert Noyce Teacher Scholarship Program
  • 批准号:
    1035355
  • 项目类别:
    Standard Grant
  • 资助金额:
    $119.95万
  • 财政年份:
    2010
  • 负责人:
    Sandra Carlson
  • 依托单位:
Collaborative Research: Examining Origination, Extinction, and Recovery in Terebratulide Brachiopods: The Integration of Phylogeny, Morphometrics, and Biogeography
  • 批准号:
    0229897
  • 项目类别:
    Continuing Grant
  • 资助金额:
    $20.5万
  • 财政年份:
    2003
  • 负责人:
    Sandra Carlson
  • 依托单位:
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