Protomiamia yangi gen. et sp. nov. (Early Pennsylvanian; Xiaheyan, China), a sexually dimorphic Palaeozoic stem-Orthoptera
Protomiamia yangi gen. et sp. nov. (Early Pennsylvanian; Xiaheyan, China), a sexually dimorphic Palaeozoic stem-Orthoptera
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DOI：
10.1080/14772019.2016.1154899
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发表时间：
2017-03
影响因子：
2.6
通讯作者：
S. Du;O. Béthoux;Jun‐Jie Gu;D. Ren
中科院分区：
文献类型：
--
作者：
S. Du;O. Béthoux;Jun‐Jie Gu;D. Ren
中国下河沿地区提供了一个前所未有的关于早宾夕法尼亚时代昆虫的资料库。本文描述了采自该地区的直翅目昆虫一新种，杨氏原蝇Protomiamia yangi gen.et sp.nov.现有的样本使我们能够一方面根据独特的终端识别雄性和雌性个体，另一方面根据共享的翅膀颜色模式。其他的二态性方面包括体型，雄性的体型大约是雌性的三分之二。在现存的多新翅目昆虫中，这种二态性与“雄性在雌性上方”的交配位置（更确切地说，“雄性在雌性上方，腹部扭曲”）有关，我们推断这是冠状直翅目的pupeliomorphic条件。古代茎直翅目物种的划界将不得不考虑到可能发生的性别大小二型性。http://zoobank.org/urn:lsid:zoobank.org:pub:AFF5B93C-AC3D-41B0-B957-118A46157C23
The Xiaheyan locality in China is delivering an unprecedented corpus of data on Early Pennsylvanian insects. In this paper we describe a new species of stem-Orthoptera recovered from this locality, Protomiamia yangi gen. et sp. nov., for which the available sample allowed us to identify both male and female individuals based on distinctive terminalia on one hand, and a shared wing coloration pattern on the other. Other dimorphic aspects include body size, with that of the male being about two-thirds that of the female. Among extant polyneopteran insects such dimorphism is associated with the ‘male-above-female’ copulation position (more exactly, ‘male-above-female-with-his-abdomen-twisted’), which we infer as the putatively plesiomorphic condition for crown-Orthoptera. The delimitation of ancient stem-Orthoptera species will have to take into account the possible occurrence of such sexual size dimorphism. http://zoobank.org/urn:lsid:zoobank.org:pub:AFF5B93C-AC3D-41B0-B957-118A46157C23