Mooreocrinus liaoi sp. nov. (Crinoidea, Echinodermata) from the Pennsylvanian (Upper Carboniferous) Outangdi Formation in Zhejiang, South China Block

A new crinoid species of the Order Cladida, <em>Mooreocrinus liaoi</em> Mao and Li sp. nov. , is described from the Pennsylvanian (Upper Carboniferous) Outangdi Formation in Jiangshan, Zhejiang Province, representing the first record of <em>Mooreocrinus</em> Wright &amp; Strimple, 1945 in China. The presence of <em>Mooreocrinus </em>in the South China Block extends the palaeogeographic record of this genus and indicates it to be a cosmopolitan taxon. Three other ancient tectonically-separated areas that are now combined into the modern China mass (Sibumasu, Junggar, North China) do not contain any record of <em>Mooreocrinus</em>. Overall, there is low biodiversity of the Late Paleozoic crinoid faunas in the South China Block. Our new materials provide further evidence for diversity assessment of crinoid faunas in peri-Gondwana blocks.本文记述了产自浙江省江山市宾夕法尼亚纪（Pennsylvanian，晚石炭世）奥特塘组（Outangdi Formation）的枝形海百合目（Cladida）一新种——廖氏摩尔海百合（Mooreocrinus liaoi Mao and Li sp. nov.），这是摩尔海百合属（Mooreocrinus Wright & Strimple, 1945）在中国的首次化石记录。华南地块（South China Block）产出该属化石，拓展了摩尔海百合属的古地理分布范围，证实其为广布类群。现今合并为现代中国陆块的另外三个古构造分隔地块——西缅-马来地块（Sibumasu）、准噶尔地块（Junggar）与华北地块（North China）——均未发现该属的化石记录。总体而言，华南地块晚古生代海百合动物群的生物多样性较低。本次发现的新材料为冈瓦纳周缘地块（peri-Gondwana blocks）的海百合动物群多样性评估提供了新的佐证。