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首页> 外文期刊>Bulletin. Sciences de la Terre. Sciences de la Terre >Nursallia tethysensis sp. nov., a new pycnodont fish (Neopterygii: tHalecostomi) from the Cenomanian of Lebanon
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Nursallia tethysensis sp. nov., a new pycnodont fish (Neopterygii: tHalecostomi) from the Cenomanian of Lebanon

机译：特尔纳斯藻十一月，来自黎巴嫩的西诺曼尼亚的一种新的比丘多鱼（Neopterygii：tHalecostomi）

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摘要

A new species of Pycnodont, Nursallia tethysensis, is described from the Cenomanian of En Nammoura and Hgula (Lebanon). It is a rarely encountered member of the ichthyofauna in these two localities and represents the smallest-sized species ever described in the genus. The frontal is broad, rounded, with an almost vertical profile. The hypertrophied dermosupraoccipital bears small spines on its median line. The parietal does not contact the frontal. The dermopterotic and the frontal join by only a thin osseous bridge under the dermosupraoccipital and above the orbit. The ventral profile has a characteristic "V"-shape notch at the junction between the head and the abdomen. There are 31 to 33 vertebrae. Nursallia tethysensis shows a closer relationship with N. gutturosum from the Cenomanian of Morocco and Italy than with the other species of the genus. The particularly good state of preservation permits examination of the ultrastructure of the teeth, demonstrating the presence of dentinal canaliculii only in the radicular area of these teeth. The chemical composition of both the eyes (characterized by high sulphur content, presumably derived from the original proteins of this region) and the bones (constituted of hydroxy-apatite almost identical to the bone component of modern fishes) are proof of the complete conservation of the organic remains fossilized in the Lebanese Cenomanian limestones.
机译：从En Nammoura和Hgula（黎巴嫩）的Cenomanian中描述了一种新的碧萝odo物种Nursallia tethysensis。在这两个地方，它是鱼科鱼类中很少见的成员，代表该属中描述过的最小的物种。额叶宽阔，圆形，几乎垂直。肥大的皮肤上枕骨的中线有小刺。顶叶不接触额叶。皮下和额叶仅在真皮上枕下方和眼眶上方通过一薄骨桥连接。腹侧面在头部和腹部之间的连接处具有特征性的“ V”形缺口。有31至33块椎骨。与摩洛哥其他物种相比，Neursallia tethysensis与来自摩洛哥和意大利的切诺曼尼亚的古特猪笼草关系更密切。良好的保存状态允许检查牙齿的超微结构，这表明仅在这些牙齿的根部区域存在牙本质小管。眼睛（以高硫含量为特征，推测可能来自该区域的原始蛋白质）和骨头（由羟基磷灰石组成，几乎与现代鱼类的骨头成分相同）的化学成分证明了鱼的完全保存。黎巴嫩切诺曼尼亚石灰石中的有机化石残骸。

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