''Ctenolepisma guadianicum'' is a species of silverfish in the family Lepismatidae. Like all silverfish, guadianicum prefers very humid environments, although some members of Thysanura have evolved minor adaptations to alter this. Guadianicum, similar to the vast majority of the near four hundred discovered

silverfish The silverfish (''Lepisma saccharinum'') is a species of small, primitive, wingless insect in the order Zygentoma (formerly Thysanura). Its common name derives from the insect's silvery light grey colour, combined with the fish-like appearance ...

, lives outdoors, under

detritus In biology, detritus () is dead particulate organic material, as distinguished from dissolved organic material. Detritus typically includes the bodies or fragments of bodies of dead organisms, and fecal material. Detritus typically hosts commun ...

, leaves, and other fallen forest debris. This silverfish is grey in appearance, less than an inch long, with an oblong body shape. All members of Ctenolepisma have lengthy, angled antennae that extend from their head and reach towards their abdomen. Guadianicum also lacks wings, has three pairs of legs, and has abdomen appendages appearing similar to antennae. Unlike the indoor dwelling silverfish species, guadianicum is not considered a

pest Pest or The Pest may refer to: Science and medicine * Pest (organism), an animal or plant deemed to be detrimental to humans or human concerns ** Weed, a plant considered undesirable * Infectious disease, an illness resulting from an infection ** ...

, however, this means that little else is known about this particular species discovered in the 1990s.

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