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Exceptional preservation of clam shrimp (Branchiopoda, Eucrustacea) eggs from the Early Cretaceous Jehol Biota and implications for paleoecology and taphonomy
Pan, Yanhong (泮燕红)1; Wang, Yaqiong (王亚琼)1; Sha, Jingeng (沙金庚)2; Liao, Huanyu (廖焕宇)2
2015-05-01
Source PublicationJOURNAL OF PALEONTOLOGY
ISSN0022-3360
Volume89Issue:3Pages:369-376
Abstract

Fossil eggs of clam shrimps Spinicaudata) are rare and little attention has been paid to the study of their shape and microstructures. Here, we report the discovery of exceptionally preserved three-dimensional eggs from numerous specimens of Eosestheria elliptica Chen, 1976 from the lacustrine Early Cretaceous Yixian Formation in western Liaoning, China. These three-dimensionally preserved fossil eggs display a spherical shape with smooth surface, part of the tertiary envelope, and possibly the first embryonic cuticle, which were previously unknown or ambiguous. The eggs are abundant and assumed to be attached to the exopod as in extant Spinicaudata. Moreover, the exceptional three-dimensional preservation and delicate preparation of slices of the eggs allowed us to document the microstructures and elemental composition of fossil eggs of clam shrimps from the Jehol Biota. Energy dispersive spectroscopy of the fossilized envelope revealed a calcium phosphate composition. However, the egg contents display two completely different elemental compositions. Some exhibit the same elemental composition as the envelope, whereas others has been replaced by alumino-silicate. The taphonomic process is also briefly discussed in this paper.

DOI10.1017/jpa.2015.24
Language英语
WOS KeywordArtemia-franciscana ; Brine Shrimp ; Resting Eggs ; Genus Eulimnadia ; Cyst Shell ; Crustacea ; Anostraca ; Morphology ; Identification ; Conchostraca
Funding ProjectNational Natural Science Foundation of China[91114201] ; National Natural Science Foundation of China[41102005] ; National Basic Research Program of China (973 program)[2012CB821906]
WOS Research AreaPaleontology
WOS SubjectPaleontology
WOS IDWOS:000363918700001
Funding OrganizationNational Natural Science Foundation of China ; National Basic Research Program of China (973 program)
PublisherCAMBRIDGE UNIV PRESS
Document Type期刊论文
Identifierhttp://ir.nigpas.ac.cn/handle/332004/11601
Collection中国科学院南京地质古生物研究所
其他
Corresponding AuthorPan, Yanhong (泮燕红)
Affiliation1.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, Key Lab Econ Stratig & Palaeogeog, Nanjing 210008, Jiangsu, Peoples R China
2.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, State Key Lab Palaeobiol & Stratig, Nanjing 210008, Jiangsu, Peoples R China
Recommended Citation
GB/T 7714
Pan, Yanhong ,Wang, Yaqiong ,Sha, Jingeng ,et al. Exceptional preservation of clam shrimp (Branchiopoda, Eucrustacea) eggs from the Early Cretaceous Jehol Biota and implications for paleoecology and taphonomy[J]. JOURNAL OF PALEONTOLOGY,2015,89(3):369-376.
APA Pan, Yanhong ,Wang, Yaqiong ,Sha, Jingeng ,&Liao, Huanyu .(2015).Exceptional preservation of clam shrimp (Branchiopoda, Eucrustacea) eggs from the Early Cretaceous Jehol Biota and implications for paleoecology and taphonomy.JOURNAL OF PALEONTOLOGY,89(3),369-376.
MLA Pan, Yanhong ,et al."Exceptional preservation of clam shrimp (Branchiopoda, Eucrustacea) eggs from the Early Cretaceous Jehol Biota and implications for paleoecology and taphonomy".JOURNAL OF PALEONTOLOGY 89.3(2015):369-376.
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