Phillips N E, Pernet B
Biol Bull. 1996 Oct;191(2):199-208. doi: 10.2307/1542923.
Most of the polychaete larvae in which feeding mechanisms have been studied feed using an opposed-band mechanism, capturing particles with prototrochal and metatrochal ciliary bands and transporting them to the mouth via a food groove. However, many other planktotrophic polychaete larvae lack a metatroch and food groove and thus must feed in a different way. In this latter group are the larvae of polynoid polychaetes, which not only lack a metatroch and food groove but also bear a bundle of long cilia (the oral brush) attached near the left side of the mouth. In feeding experiments with polystyrene beads and plankton, larvae of the polynoid Arctonoe vittata ingested larger particles (up to 60 {mu}m in diameter) than those ingested by the opposed-band feeding larvae of the serpulid Serpula vermicularis (up to 12 μm in diameter). Videotaped images of feeding A. vittata larvae showed that capture behavior was elicited as particles in a feeding current driven by the prototroch approached or contacted the larval episphere. Particles on or very near the episphere were disengaged by a recoiling motion of the larva and were then moved to the mouth, probably by the oral brush. This feeding mechanism may be widespread in the polychaete superfamily Aphroditacea, which includes about 10% of extant polychaete species.
在已对摄食机制进行研究的多数多毛类幼虫中，它们利用对向带机制进行摄食，通过原轮和后轮纤毛带捕获颗粒，并经由食物沟将其输送至口中。然而，许多其他浮游性多毛类幼虫没有后轮和食物沟，因此必须以不同的方式摄食。多鳞虫类多毛类幼虫就属于后一组，它们不仅没有后轮和食物沟，而且在口的左侧附近还长有一束长纤毛（口刷）。在用聚苯乙烯珠粒和浮游生物进行的摄食实验中，多鳞虫Arctonoe vittata的幼虫摄取的颗粒（直径达60微米）比盘管虫Serpula vermicularis的对向带摄食幼虫摄取的颗粒（直径达12微米）更大。对摄食中的A. vittata幼虫的录像图像显示，当由原轮驱动的摄食流中的颗粒接近或接触幼虫的上半球时，就会引发捕获行为。上半球上或非常靠近上半球的颗粒会因幼虫的后缩运动而脱离，然后可能由口刷将其移至口中。这种摄食机制可能在多毛类鳞沙蚕超科中广泛存在，该超科包括约10%的现存多毛类物种。
