The puzzle of Metazoan life history evolution: are feeding larvae always primitive?

后生动物生活史进化之谜：摄食幼虫总是原始的吗？

• 批准号: DP0558736
• 负责人: Prof Michael Lee
• 金额: $ 17.3万
• 依托单位: The University of Adelaide
• 依托单位国家: 澳大利亚
• 项目类别: Discovery Projects
• 财政年份: 2005
• 资助国家: 澳大利亚
• 起止时间: 2005-01-01 至 2007-12-31
• 项目状态: 已结题
• 来源: https://dataportal.arc.gov.au/RGS/Web/Grants/DP0558736
• 关键词: puzzle; Metazoan; life; history; evolution

Most marine animals have a complex life-cycles with alternating pelagic larvae and benthic adults. An theory about animal life-history evolution states that feeding larvae are always primitive and larval feeding is lost but not gained. This hypothesis is based in part on studies on the 'classical' trochophore of marine worms such as Serpulidae, a group with both feeding and non-feeding larvae. We intend to establish a detailed phylogeny for Serpulidae and assess the evolution of larvae in the group. If feeding larvae are shown to be secondary this will raise doubts about established theories of animal evolution.

大多数海洋动物有一个复杂的生活史，浮游幼虫和底栖成虫交替出现。一种关于动物生活史进化的理论认为，摄食的幼虫总是原始的，幼虫的摄食会失去但不会获得。这一假说在一定程度上是基于对海洋蠕虫的“经典”担轮生物的研究，例如蛇科，这是一个既有摄食又有非摄食幼虫的群体。我们打算建立一个详细的系统发育，并评估该群体中的幼虫的进化。如果摄食幼虫被证明是次要的，这将使人们对动物进化的既定理论产生怀疑。