Physical Characteristics

Species does not have a calcareous carapace. Females reach 0.78 in (2 cm) in length; body is colorless or yellowish and covered by a large mantle. Cavity is exposed to water by the narrow fissure-like orifice. The preoral region has a wide and flat disc plate that larvae use to form attachments to a host's shell. Thorax is bent by segmentation. Three pairs of appendages within the mouth; one pair of reduced cirri near the mouth. Only three uniramous pairs of cirri located at the end of the thorax. Females have an incomplete gut so ceca are able to reach into various parts of the body; anus is absent. Dwarf males are 0.047 in (1.2 mm) long, bottle-shaped, legless, and attach to females. Antennae are the only appendages present and there are no internal organs other than reproductive ones.

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