腕足类

A lot of brachiopod and mollusk fossils,including 12 species of 8 genera of brachiopod,14 species of 8 genera of bivalve and 5 species of 4 genera of gasteropod,are collected from the marl and mudstone situated on the bottom of Benxi Formation in Liujiang basin.The mollusk fossils are directly preserved in the upper part or facies change bed of brachiopod fossil bed.Up to now, the materials is firstly reported,especially the mollusk.

柳江盆地本溪组底部泥灰岩及相邻泥岩中产有丰富的腕足动物、软体动物化石，经鉴定有腕足动物10属12种，双壳类8属14种和腹足类4属5种，软体动物保存于含腕足动物层的相变岩层或直接位于其上层，到目前为止，这一丰富材料尚属首次综合报道。

Thus, it can be inferred that the Selong Group in the southern Tibet is also Lopingian in age in view of its correctable brachiopod faunas with those of the Kalabagh Member of the upper Wargal Formation and the Chhidru Formation and the conodont zones around the Permian/Triassic boundary in southern Tibet.

我国西藏南部色龙群及相当地层含有与巴基斯坦盐岭地区Kalabagh段和Chhidru组可对比的乐平世腕足动物群以及二叠系—三叠系界线附近连续的牙形类化石带，由此可以推定色龙群的时代应为乐平世。

Persculptus to Parakidograptus acuminatus Zones, could be recognized during theinterval. In addition, the abundance changes of the radiolaria at the Goujiaya and Datangkou sections werecoincided with the sea-level changes, and correlatable with the synchorous 5 fluctuations of the sea-level inNorth America and Africa. So above-mentioned 5 cycles could represent the eustasies during the latestOrdovician to the earliest Silurian.

在这2个剖面上，放射虫丰度变化也表现出相似的规律，与笔石和腕足类的形态、分异度和丰度变化所反应的海平面升降大体一致，和北美、非洲同期海平面的5次波动可以对比，据此指出，以上5次海平面旋回代表了晚奥陶世晚期至志留纪初期全球性海平面变化。

Systematic geological investigation and stratum section study was approved that no early Carboniferous Brochipoda: Eochoristites, Fusella, Spirifer etc.

系统地质调查和地层剖面研究证实：海南岛南好地区早石炭世南好组选层型剖面、创名地化石点等所报道的早石炭世腕足类：Eochoristites，Fusella，Spirifer等并未发现。

And based on the correlation between the conodonts and brachiopods, the conflict of the division of the Late Carboniferous-Early Permian between the Gondwana and Tethys was discovered.

发现了牙形石和腕足类在晚石炭世一早二叠世地层划分的意见分歧，指出现在的冈瓦纳相和特提斯相晚石炭世一早二叠世地层划分的主导门类之间还存在着巨大矛盾，有待于进一步解决。

Shelly creatures such as trilobites and brachiopods, of whose ancestors there is little sign in the rocks, are suddenly everywhere.

像三叶虫、腕足动物此般壳类动物的祖先没有在岩层中留下什么痕迹，但它们的遗迹却突然间比比皆是。

Mainly by the size of the distribution of sea lilies stems and small brachiopods and elastic.

主要由密集分布的大小不一的海百合茎及少量腕足类等生物碎屑组成。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。