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Exceptional preservation of reproductive organs and giant sperm in Cretaceous ostracods
Wang, He (王贺)1,2; Matzke-Karasz, Renate3; Horne, David J.4; Zhao, Xiangdong (赵向东)1,2,5; Cao, Meizhen (曹美珍)1,2; Zhang, Haichun (张海春)1,2; Wang, Bo (王博)1,2
2020-09-30
发表期刊PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES
ISSN0962-8452
卷号287期号:1935页码:8
摘要

The bivalved crustacean ostracods have the richest fossil record of any arthropod group and display complex reproductive strategies contributing to their evolutionary success. Sexual reproduction involving giant sperm, shared by three superfamilies of living ostracod crustaceans, is among the most fascinating behaviours. However, the origin and evolution of this reproductive mechanism has remained largely unexplored because fossil preservation of such features is extremely rare. Here, we report exceptionally preserved ostracods with soft parts (appendages and reproductive organs) in a single piece of mid-Cretaceous Kachin amber (approximately 100 Myr old). The ostracod assemblage is composed of 39 individuals. Thirty-one individuals belong to a new species and genus,Myanmarcypris huigen. et sp. nov., exhibiting an ontogenetic sequence from juveniles to adults (male and female). Seven individuals are assigned toThalassocypriasp. (Cypridoidea, Candonidae, Paracypridinae) and one toSanyuaniasp. (Cytheroidea, Loxoconchidae). Our micro-CT reconstruction provides direct evidence of the male clasper, sperm pumps (Zenker organs), hemipenes, eggs and female seminal receptacles with giant sperm. Our results reveal that the reproduction behavioural repertoire, which is associated with considerable morphological adaptations, has remained unchanged over at least 100 million years-a paramount example of evolutionary stasis. These results also double the age of the oldest unequivocal fossil animal sperm. This discovery highlights the capacity of amber to document invertebrate soft parts that are rarely recorded by other depositional environments.

关键词giant sperm sexual reproduction ostracods Cretaceous
DOI10.1098/rspb.2020.1661
收录类别SCI
语种英语
关键词[WOS]MORPHOLOGY ; CRUSTACEA ; SIZE ; AGE
资助项目Strategic Priority Research Program of the Chinese Academy of Sciences[XDB26000000] ; Second Tibetan Plateau Scientific Expedition and Research[2019QZKK0706] ; National Natural Science Foundation of China[41688103]
WOS研究方向Life Sciences & Biomedicine - Other Topics ; Environmental Sciences & Ecology ; Evolutionary Biology
WOS类目Biology ; Ecology ; Evolutionary Biology
WOS记录号WOS:000573897200004
项目资助者Strategic Priority Research Program of the Chinese Academy of Sciences ; Second Tibetan Plateau Scientific Expedition and Research ; National Natural Science Foundation of China
出版者ROYAL SOC
文献类型期刊论文
条目标识符http://ir.nigpas.ac.cn/handle/332004/32616
专题中国科学院南京地质古生物研究所
通讯作者Wang, He (王贺); Wang, Bo (王博)
作者单位1.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, State Key Lab Palaeobiol & Stratig, 39 East Beijing Rd, Nanjing 210008, Peoples R China
2.Chinese Acad Sci, Ctr Excellence Life & Paleoenvironm, 39 East Beijing Rd, Nanjing 210008, Peoples R China
3.Ludwig Maximilians Univ Munchen, Dept Earth & Environm Sci Palaeontol & Geobiol, Richard Wagner Str 10, D-80333 Munich, Germany
4.Queen Mary Univ London, Sch Geog, Mile End Rd, London E1 4NS, England
5.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
第一作者单位中国科学院南京地质古生物研究所
通讯作者单位中国科学院南京地质古生物研究所
推荐引用方式
GB/T 7714
Wang, He ,Matzke-Karasz, Renate,Horne, David J.,et al. Exceptional preservation of reproductive organs and giant sperm in Cretaceous ostracods[J]. PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES,2020,287(1935):8.
APA Wang, He .,Matzke-Karasz, Renate.,Horne, David J..,Zhao, Xiangdong .,Cao, Meizhen .,...&Wang, Bo .(2020).Exceptional preservation of reproductive organs and giant sperm in Cretaceous ostracods.PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES,287(1935),8.
MLA Wang, He ,et al."Exceptional preservation of reproductive organs and giant sperm in Cretaceous ostracods".PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES 287.1935(2020):8.
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