Thermobia

Thermobia is a genus of small, primitive arthropods belonging to the order Protura, a group of entirely wingless insects that lack compound eyes and antennae. The only known species in this genus is *Thermobia domestica*, commonly referred to as the house centipede or silverfish. Despite its name, *Thermobia* is not a true centipede but rather a member of a distinct lineage of microinvertebrates that thrive in warm, humid environments.

This species is characterized by its slender, oval body, which measures approximately 5 to 7 millimeters in length. Its body is divided into 13 segments, with only the first pair of legs being functional, a trait shared with other proturans. *Thermobia domestica* exhibits a pale, silvery-gray coloration, often with a faint pinkish hue, and its body is covered in fine hairs. Its antennae are short and segmented, and its mouthparts are adapted for chewing, allowing it to feed on a variety of organic materials, including paper, fabrics, and carbohydrates.

Thermobia is primarily found in human dwellings, particularly in warm, damp areas such as basements, bathrooms, and storage spaces. It is an opportunistic feeder and can become a minor pest in households where conditions are conducive to its survival. Unlike many insects, *Thermobia* does not bite humans but may cause damage to stored goods by consuming cellulose-based materials.

Reproduction in *Thermobia* is relatively simple, with females laying eggs in moist environments. The eggs hatch into nymphs, which gradually mature into adults over several molts. The species has a relatively short lifespan, typically lasting a few months. Due to its small size and nocturnal nature, *Thermobia* is often overlooked but can be a nuisance in environments where it proliferates. Research into its biology and ecological role remains limited, though it is considered an important model organism in studies of primitive arthropod evolution.