威尼斯正规官网-威尼斯官方网站-首页

     威尼斯正规官网 >> 出版物 >> 古脊椎动物学报 >> 封面先容

封面先容

《古脊椎动物学报》2018年第56卷第1期

发表日期:2018-01-04来源:放大 缩小

封面说明: 云南曲靖早泥盆世洛霍考夫期无颌类盔甲鱼生态复原图。该地区盔甲鱼物种多样性非常丰富。惠清驼背鱼(新属、新种) (Altigibbaspis huiqingae gen. et sp. nov.) 是西山村组最新发现的多鳃鱼目一新属种。驼背鱼与多鳃鱼非常相似,但前者头甲背面具有一特征性的驼背状隆起,其上具有一刀刃状的中背脊。中背脊和中背棘在盔甲鱼类里的多样性表明,它们除了能够提供方向稳定性外,可能还衍生出了一些附加的功能,例如直立高耸的中背棘能使盔甲鱼在捕食者眼里具有恐吓性的大小,刀刃状的中背脊可能也起到一些防御的作用,能够抵御当时的大型无脊椎动物板足鲎。图中惠清驼背鱼(前左)、小眼南盘鱼 (后右上)、张氏真盔甲鱼(右下)、双翼王冠鱼(后左中)与大型海蝎子板足鲎(后中) 共生在一起。板足鲎正在捕食廖角山多鳃鱼。详见刘玉海等人文 (p. 1)。(绘图:杨定华)

Cover image: Ecological reconstruction of galeaspids (Agnatha) in Qujing, Yunnan Province during the Lochkovian, Early Devonian. Galeaspids exhibit a high diversity in Qujing during the Lochkovian, Early Devonian. Altigibbaspis huiqingae gen. et sp. nov. is a new form of the Polybranchiaspiformes (Galeaspida) from the Xishancun Formation. The Polybranchiaspis-like new genus is characterized by a blade-like median dorsal ridge on the dorsal side of head-shield. The morphological disparity of the median dorsal ridge and spine in galeaspids indicates that some additional functions of these structures have been developed except for providing a directional stability. The high upright and compressed spine may render galeaspid fishes an apparently larger size as seen by a predator, and a blade-like median dorsal ridge may serve a defensive function against the claws of large sea scorpions. In the picture, Altigibbaspis huiqingae (front, left), Nanpanaspis microculus (back, right-up), Eugaleaspis changi (back, right-down), and Stephaspis dipteriga (back, left-middle) lived with the large sea scorpions eurypterids (back, middle). Eurypterids were preying on Polybranchiaspis liaojiaoshanensis. See details in the paper of Liu et al. (p. 1). (Illustrated by Yang Dinghua)

附件:

威尼斯正规官网|威尼斯官方网站

XML 地图 | Sitemap 地图