One of many types of House Spiders, Metaltella simoni actually came a long way to make itself at home in yours.
The dark brown House spider, M. simoni is native to the eastern South American countries of Argentina, Brazil and Uruguay. It arrived in North America in the 1900's via trade routes between the two continents. It has established a stable presence in the warm, humid states along the Gulf of Mexico as well as parts of California. M. simoni appears to be outcompeting native spiders, like T. brunnea, for resources, which is cause for concern in those regions.
This House Spider is not known to be harmful to humans. Its gangly legs and dark body make it easy to spot on light-colored ceilings and walls. It is also comfortable living outdoors and can be found on trees, on the ground and under rocks and leaf litter. Its web is a fluffy mess of spider silk that has been combed out to maximize its efficacy. Females lay fertilized eggs in a sac of bumpy silk and hide it using dirt, debris or other nearby material.
This spider is commonly mistaken for a Brown Recluse (even though it clearly lacks the tell-tale dark 'violin-shaped' mark on its head) as well as the non-aggressive Hacklemesh Weaver spider.
Scientific Name: Metaltella simoni
Size (Adult; Length): 6mm to 10mm (0.23in to 0.39in)
Note: An insect's reach is not limited by lines drawn on a map and therefore species may appear in areas, regions and/or states beyond those listed above as they are driven by environmental factors (such as climate change), available food supplies and mating patterns. Grayed-out selections indicate that the subject in question has not been reported in that particular territory. U.S. states and Canadian provinces / territories are clickable to their respective bug listings.
Legs: Spiders have four pairs of legs and these are attached to the cephalothorax.
Pedipalps: Small appendages near the mouth used as taste and smell organs.
Cephalothorax: Contains eyes, head, mouthparts, and legs.
Abdomen: Contains various organs related to digestion, reproduction, and web-making.
Spinnerets: Used in the production of spider silk for fashioning webs or catching prey.
NOTE: Unlike insects, spiders have both an endoskeleton (internal) and exoskeleton (external).