Atypical 'long-tailed' cockroaches arose during Cretaceous in response to angiosperm terrestrial revolution

doi:10.7717/peerj.15067

NIGPAS OpenIR

	Atypical 'long-tailed' cockroaches arose during Cretaceous in response to angiosperm terrestrial revolution
通讯作者	Huang, Di-Ying(dyhuang@nigpas.ac.cn)
	Li, Xin-Ran; Huang, Di-Ying
	2023-03-29
发表期刊	PEERJ
ISSN	2167-8359
卷号	11 页码:21
摘要	Typical cockroaches are flat, broad, with large pronotum , wings covering the body. This conserved morphotype dates back to the Carboniferous, during which the ancestral cockroaches, or roachoids, originated. On the other hand, the ovipositor of cockroaches gradually reduced during the Mesozoic, coupled with a major shift of reproductive strategy. By the Cretaceous, long external ovipositors became rare, most cockroaches used very short or even hidden internal ovipositors to fabricate egg cases (oothecae), which is an innovation for egg protection. Here, we describe two cockroaches from mid-Cretaceous Myanmar amber: Ensiferoblatta oecanthoides gen. et sp. nov. (Ensiferoblattidae fam. nov.) and Proceroblatta colossea gen. et sp. nov. They are slim, elongate, fusiform, with longitudinal pronotum , have long external ovipositors. The combination of these traits represents a unique morphotype, which resembles crickets and katydids (Ensifera) more than general cockroaches. Ensiferoblatta and Proceroblatta may be arboreal, feeding on and/or laying eggs into certain angiosperms that newly emerged. Their open habit causes latent impairment to viability, and may contribute to their extinction. These new taxa are the youngest members of the ancient, extinct group of cockroaches, namely Eoblattodea, which are characterized by long ovipositors. We speculate that the extinction of certain gymnosperm hosts almost ended the 200-My triumph of Eoblattodea. Despite an attempt to adapt to angiosperm hosts, Ensiferoblatta, Proceroblatta and suchlike cockroaches as an evolutionary dead end failed to save Eoblattodea from extinction. The lack of protection for eggs (maternal care in particular) might accelerate the extinction of Eoblattodea as a whole.
关键词	Amber Angiosperm Dictyoptera Eoblattodea Fossil Holopandictyoptera Oviposi-tor Roachoids
DOI	10.7717/peerj.15067
收录类别	SCI
语种	英语
资助项目	Second Tibetan Plateau Scientific Expedition and Research project[2019QZKK0706] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB26000000] ; National Natural Science Foundation of China[41925008] ; National Natural Science Foundation of China[42288201]
WOS研究方向	Science & Technology - Other Topics
WOS类目	Multidisciplinary Sciences
WOS记录号	WOS:000996307700003
项目资助者	Second Tibetan Plateau Scientific Expedition and Research project ; Strategic Priority Research Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China
出版者	PEERJ INC
文献类型	期刊论文
条目标识符	http://ir.nigpas.ac.cn/handle/332004/42175
专题	中国科学院南京地质古生物研究所
通讯作者	Huang, Di-Ying
作者单位	Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, Ctr Excellence Life & Paleoenvironm, State Key Lab Palaeobiol & Stratig, Nanjing, Peoples R China
推荐引用方式 GB/T 7714	Li, Xin-Ran,Huang, Di-Ying. Atypical 'long-tailed' cockroaches arose during Cretaceous in response to angiosperm terrestrial revolution[J]. PEERJ,2023,11:21.
APA	Li, Xin-Ran,&Huang, Di-Ying.(2023).Atypical 'long-tailed' cockroaches arose during Cretaceous in response to angiosperm terrestrial revolution.PEERJ,11,21.
MLA	Li, Xin-Ran,et al."Atypical 'long-tailed' cockroaches arose during Cretaceous in response to angiosperm terrestrial revolution".PEERJ 11(2023):21.