Institute of Hydrobiology, Jinan University, Guangzhou 510632, China.
Eur J Protistol. 2011 Aug;47(3):214-23. doi: 10.1016/j.ejop.2011.04.002. Epub 2011 May 31.
Four planktonic species of Difflugia co-occurring in a south Chinese reservoir were found to be carnivorous, but the diet was widest in the largest species (D. tuberspinifera) and narrowest in the smallest (D. hydrostatica). It included rotifers, ciliates, dinoflagellates, floating eggs, and small particles associated with organic debris. Scavenging and cannibalism were also observed. Species with a collared test (D. biwae, D. mulanensis) showed a form of suction-feeding, while species with teeth on the pseudostome used these, together with their pseudopods, as "inverted crown corks", providing leverage for opening the lorica of their (rotifer) prey. Predators of Difflugia included cyclopoid copepods. In addition, the rotifers Asplanchna priodonta, Ploesoma hudsoni and, occasionally, big ciliates (Stentor sp.) all ingested their prey as a whole.
在中国南方的一个水库中发现了四种共生的浮游有孔虫，它们是肉食性的，但最大的物种（D. tuberspinifera）的食性最广，最小的物种（D. hydrostatica）的食性最窄。它们的食物包括轮虫、纤毛虫、甲藻、漂浮的卵和与有机碎片有关的小颗粒。还观察到了吞噬和同类相食现象。具有颈环的物种（D. biwae、D. mulanensis）表现出一种抽吸式摄食方式，而具有伪口齿的物种则将这些齿与伪足一起用作“倒置皇冠软木塞”，为打开猎物（轮虫）的鞘提供了杠杆作用。有孔虫的捕食者包括哲水蚤。此外，轮虫 Asplanchna priodonta、Ploesoma hudsoni，偶尔还有大纤毛虫（Stentor sp.），它们都会将整个猎物整个吞下。
