Enrolment and trunk segmentation of a Cambrian eodiscoid trilobite. (15th April 2019)

• Record Type: Journal Article
• Authors: Dai, Tao; Zhang, Xing‐Liang; Peng, Shan‐Chi; Yang, Ben
• Is Part Of: Lethaia. Volume 52:Number 4(2019)
• Page Start: 502
• Page End: 512
• Publication Date: 2019-04-15
• Subjects: Cambrian -- enrolment -- eodiscoids -- ontogeny -- Trilobita -- trunk segmentation; Paleontology -- Periodicals; Geology, Stratigraphic -- Periodicals; 560
• DOI: 10.1111/let.12327
• Languages: English
• ISSNs: 0024-1164

Abstract

Abstract : Completely enrolled, phosphatized, 3‐D specimens of the eodiscinid trilobite Tsunyidiscus yanjiazhaiensis from Cambrian Stage 3 of South China exhibit much morphological detail and show variation in delicate coaptative structures associated with their trunk segmentation. The relationship between enrolment mechanism and trunk segmentation during ontogeny confirms a unique developmental pattern among the early Cambrian eodiscoid trilobites, revealing how these animals controlled the rate of segment increase and release during post‐embryonic development in their life cycles.