State Key Laboratory for Continental Dynamics and Geology Department, Shaanxi Key laboratory of Early Life and Environments and Northwest University, Xian, 710069, China.
State Key Laboratory of Palaeobiology and Stratigraphy (Nanjing Institute of Geology and Palaeontology, CAS), Nanjing, 210008, China.
Biol Rev Camb Philos Soc. 2023 Feb;98(1):63-80. doi: 10.1111/brv.12895. Epub 2022 Sep 12.
The developmental mode of four redlichiid trilobites is summarized, based upon exceptionally well-preserved, articulated specimens from Cambrian Series 2 (stages 3 and 4) strata in southwestern China and South Australia. These relatively complete developmental sequences indicate a balanced rate in segment increase and addition to the thorax during the meraspid phase, which might explain why most redlichiids possess micropygous body patterning during ontogeny. In addition, an analysis of the size distribution, developmental strategy, and distribution of specimen numbers at different growth stages reveals a distinct developmental strategy during the redlichiid life cycle. A relatively short pre-holaspid and a prolonged holaspid phase in these redlichiid taxa offers insight into the developmental control and life strategy in these primitive arthropods.
总结了四个 Redlichiid 三叶虫的发育模式，这些三叶虫标本保存异常完好，来自中国西南部和南澳大利亚的寒武纪系列 2 （阶段 3 和 4）地层。这些相对完整的发育序列表明，在幼体阶段，胸部的节数增加和附加的速度是平衡的，这可能解释了为什么大多数 Redlichiid 在个体发育过程中具有微尾的身体模式。此外，对不同生长阶段的个体数量的大小分布、发育策略和分布的分析揭示了 Redlichiid 生命周期中独特的发育策略。这些 Redlichiid 类群相对较短的前幼体期和较长的幼体期为这些原始节肢动物的发育控制和生活策略提供了深入了解。
