Glochidion plants and Epicephala moths played different roles and kept the balance in the mutualism. We studied the four coexisting Epicephala species on Glochidion sphaerogynum in detail and reconstructed the phylogenic tree of 40 Gracillariidae species. The results showed that one of them (Epicephala impolliniferens) did not pollinate G. sphaerogynum, because of lacking the specialized structure of carrying pollen. These results suggested that E. impolliniferens acted as a ‘cheater’ in the system. The phylogenetic analyses suggested that E. impolliniferens derived from a pollinating species, and had secondarily gave up the ability to pollinate. This is a typical phenomenon of mutualism reversal. The phenomenon exhibits the co-evolutionary diversification under selection pressures.

中文翻译：

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多种共存物种，以及与热带亚洲的鳞翅目（Phyllanthaceae）物种有关的表皮动物（Gracillariidae）的骗子的第一个已知病例。

Glochidion植物和Epicephala蛾起着不同的作用，并在相互关系中保持平衡。我们研究了四个共存Epicephala物种算盘sphaerogynum在细节和重建的40个Gracillariidae种的系统进化树。结果表明，他们中的一个（Epicephala impolliniferens）没有授粉G. sphaerogynum，由于缺乏携带花粉的特殊结构。这些结果表明E. impolliniferens在系统中充当“骗子”。系统发育分析表明，E。impolliniferens来自授粉物种，其次放弃了授粉能力。这是互惠主义逆转的典型现象。该现象在选择压力下表现出共同进化的多样化。