Histologic Structure of the Harvestman Leiobunum japonicum (Arachnida: Opiliones: Sclerosomatidae)

Opiliones are an order of arachnids commonly known as harvestmen. Although they belong to the class of arachnids, harvestmen are not spiders. Harvestmen are well known for their exceptionally long legs compared to body size, and the made up of two main parts, cephalothorax and abdomen. Although over 6,400 species of harvestmen have been discovered worldwide, the research on these arachnids is still an unexplored field comparing to spiders or insects. The Harvestmen is the Arachnids disregarded to Korean researchers. Therefore, in Korea, it doesn't become nearly the investigation of the harvestmen. Histological data about the harvestmen tries to be provided through the research of the internal structure of the harvestmen. The study of structures of the opiliones was made with the histological image and it focused mainly on the eye, leg, and genital organs.