Small (less than 0.12 in [3.0 mm] in length), can grow up to 0.11 in (2.8 mm) long, but usually are 0.0394-0.0787 in (1.0-2.0 mm) in length. It is light yellow to white, being almost colorless; has many-segmented, whip-like post-abdomen and a wide pre-abdomen. Chelicerae are thin, long, and pin-cer-like (chelate), with three articles and lateral moveable finger. Mouth is located at tipped end of prominent protuberance. A labium is present.
It does not have eyes, a respiratory system, or a circulatory system, but does have innervated setae that detect vibrations. Receives oxygen through very thin and colorless cuticles. No Malpighian tubules but, instead, pair of excretory coxal glands. It has carapace (propeltidium) divided in three pieces, with 11 defined segments in abdomen and four parts in sternum. The prosoma is covered by two free tergites and is attached to opisthosoma by pedicel; opisthosoma has anterior mesosoma and short posterior metasoma possessing a flagellum with many articles. Other appendages are leg-like. Pedipalpal coxae are not part of preoral cavity, and are similar to leg coxae. Several sternites are present. The first leg, used as a feeler, is positioned distally, and possesses many articles.
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