江苏南京淡水海绵新发现

FRESHWATER SPONGES FROM NANJING, JIANGSU PROVINCE

本文报道了2种发现于江苏南京珍珠泉的淡水海绵新种,包括Eunapius rarus Zhao et Ma sp. nov和E.nanjingensis Zhao et Ma sp. nov.其中,E.rarus首次显示Eunapius存在小骨针,为双尖带刺型(microsclere acanthoxeas)。另外,E.nanjingensis的鉴别特征为,芽球骨针多样,双尖为主,部分钝头,表面光滑或有刺,中部膨大。此外,我们对已报道的中国淡水海绵的生物地理分布进行了分析与讨论。

We report two species of freshwater sponges collected in Jingshan Lake(Zhenzhuquan Park) in the northern suburb of Nanjing, including Eunapius rarus Zhao et Ma sp. nov. and E. nanjingensis Zhao et Ma sp. nov. E. rarus improve for the first time the presence of microsclere in Eunapius sponges, microscelre acanthoxeas. In addition, E. nanjingensis is distinguished by possessing both spiny oxeas and strongyles of gemmuloscleres of variable sizes with variable spines;gemmuleosceres often possess the swellings of up to half its length. We also discussed the biogeographic distribution of freshwater sponges so far reported from different areas in China and their probable biogeographic provinces.