Journal
PAPERS IN PALAEONTOLOGY
Volume 8, Issue 4, Pages -Publisher
WILEY
DOI: 10.1002/spp2.1465
Keywords
echinoderm; edrioasteroid; Cambrian; Chengjiang biota; South China
Categories
Funding
- National Natural Science Foundation of China [42072019]
- Provincial Funding of Yunnan [202201BF070001-016]
- Strategic Priority Research Program of Chinese Academy of Sciences [XDB26000000]
- Spanish Ministry of Science, Innovation and Universities [PID2021-125585NB-I00]
- European Regional Development Fund
- Government of Aragon [E18_20R]
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The article describes the fossil of Sprinkleoglobus extenuatus gen. et sp. nov. from Yunnan Province, China, which represents the first unequivocal echinoderm discovered from the early Cambrian of South China and among the oldest globally. Research suggests that early echinoderms were adapted for attaching to hard substrates, indicating that the so-called Cambrian substrate revolution was not a strong control on early evolution of attachment in echinoderms.
Until now, the earliest fossil echinoderms have been predominantly known from the early Cambrian of Laurentia and West Gondwana. Here, we describe Sprinkleoglobus extenuatus gen. et sp. nov. from the Chengjiang biota (Cambrian Series 2, Stage 3) of Yunnan Province, China. The overall profile of the theca and the morphology of the ambulacra clearly establish it as an edrioasteroid echinoderm. This represents the first discovery of an unequivocal echinoderm from the early part of the Cambrian of South China and is among the oldest records of echinoderms globally. Our material shows that edrioasteroids were diverse and widely distributed from their first occurrence in the fossil record, suggesting an earlier origin for the group. We infer that Sprinkleoglobus and other early echinoderms were adapted for attaching to hard substrates, implying that the so-called Cambrian substrate revolution was not a strong control on the early evolution of attachment in echinoderms.
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