what type of spider is this?

This appears to be a male southern house spider (Kukulcania hibernalis), also called a crevice weaver. Its long legs, reddish-brown body, and dark, fuzzy oval abdomen are characteristic.

It is not a brown recluse—brown recluses usually have a smoother, lighter abdomen and a distinct violin-shaped marking. Exact identification would be more reliable with your location.

Based on the image, this appears to be a spider from the genus Loxosceles, commonly known as a recluse spider (possibly a brown recluse or related species). Key features that suggest this:

• Uniform brown/reddish-brown coloration without obvious banding on the legs
• Slender, long legs relative to the body
• Smooth, somewhat shiny appearance to the body
• Oval, somewhat elongated abdomen
• Found on wood/bark, which is typical habitat

⚠️ Important caveats:

1. Definitive identification requires expert examination — recluse spiders are identified by their distinctive eye pattern (6 eyes arranged in 3 pairs) and a violin-shaped marking on the cephalothorax, neither of which is clearly visible in this photo.

2. It could also be a similar-looking species like a woodlouse hunter (Dysdera) or another harmless spider that mimics this appearance.

3. Recluse spiders are medically significant — their bites can cause serious tissue damage (necrosis) in some cases, though bites are rare and often occur only when the spider is pressed against skin.

Recommendation: If you found this spider in your home (especially in the US), I'd suggest:

• Don't handle it directly
• Take a clearer close-up photo if possible
• Consult an arachnologist or use a service like iNaturalist or BugGuide.net for expert ID
• Contact a pest professional if you suspect an infestation

Do you know where the photo was taken geographically? That would help narrow down the species significantly.

This is a Brown Recluse Spider (Loxosceles reclusa), a venomous arachnid in the Sicariidae family:

1. Key identifying features here are the distinct light-colored, violin/fiddle-shaped marking on its dark brown cephalothorax, the front body segment, its long, thin, spiny legs, and the small, dark, rounded abdomen.
2. Brown recluse spiders are defined by having 6 eyes arranged in 3 pairs, visible on the front of its head, and are native to the central/southern United States, often found in dark, dry spaces like wood piles, basements, or undisturbed corners. Their venom can cause tissue necrosis, making them medically significant.

Based on what's visible, this appears to be a recluse spider (genus Loxosceles), likely a brown recluse (Loxosceles reclusa) or a closely related species.

Key features that suggest this:

• Reddish-brown coloration
• Dark, oval-shaped abdomen
• Long, slender, uniformly-colored legs (no spines/banding)
• What appears to be a darker marking on the cephalothorax (the "violin" pattern recluses are known for)

A few caveats: A definitive recluse ID requires seeing the eye pattern — recluses have six eyes arranged in three pairs (dyads), unlike most spiders which have eight. If you encountered this spider and can safely get a closer look at the eyes, that would confirm it.

If you're in North America: Recluse bites are medically significant, though recluses are not aggressive and bites are rare. If bitten, seek medical attention. Note that recluses are often misidentified — if you're outside their native range (central/southern US), other brown spiders are frequently mistaken for them.

Would you like tips on distinguishing recluses from commonly confused lookalikes?