Mysmenidae
Web builder (orb-weaving spiders).
Mysmenidae is a family of small, elusive orb-weaving spiders with approximately 180 described species found in humid environments worldwide. Their tiny size, ranging from 0.76 to 3 mm, and secretive habits make them one of the least studied groups within the orb-weavers.
Key Facts
- ›Comprises about 180 described species across seventeen genera.
- ›Found in humid habitats like leaf litter and caves.
- ›Occurs in the Americas, Africa, Asia, Europe, New Guinea, and various islands.
- ›Characterized by very small body size (0.76 to 3 MM).
- ›Known for their cryptic behavior, making them difficult to observe.

Americas, Africa, Asia, Europe, New Guinea, Various Islands
Small Size, Cryptic Behavior
Cryptic Behavior
About Mysmenidae
Mysmenidae is a family of spiders that are part of the orb-weaving group. This family is notable for its approximately 180 described species, organized into seventeen genera. They are considered one of the least understood families of orb-weavers primarily due to their diminutive size, with individuals typically measuring between 0.76 and 3 millimeters (0.03 to 0.12 inches) in body length, and their inherently secretive or cryptic behavior.
Distribution and Habitat
Species within the Mysmenidae family have a broad geographic distribution. They can be found across the Americas, Africa, Asia, Europe, New Guinea, and on various islands around the world. These spiders show a preference for humid environments, commonly inhabiting areas such as leaf litter and caves, where their small stature and elusive nature allow them to thrive.
Characteristics
The defining characteristics of Mysmenidae spiders include their exceptionally small size and their tendency towards cryptic behavior. These traits make them challenging to observe and study in their natural environments, contributing to their status as a less well-known spider family. While specific details about their coloration, diet, and venom are not extensively documented in general overviews, their classification as orb-weavers suggests they construct webs to capture prey, likely small insects.
Source: Wikipedia ↗
Frequently Asked Questions
What are Mysmenidae spiders?
Mysmenidae are a family of spiders belonging to the orb-weaving spiders. They are distinguished by their small size and secretive nature, making them one of the least well-known groups in this category.
Where are Mysmenidae spiders found?
These spiders have a wide distribution, being found across the Americas, Africa, Asia, Europe, New Guinea, and numerous islands. They prefer humid environments.
What kind of habitats do Mysmenidae spiders prefer?
Mysmenidae spiders are typically found in humid environments. Common habitats include among leaf litter and within caves, where their small size and cryptic behavior aid their survival.
How large are Mysmenidae spiders?
Mysmenidae spiders are very small, with body lengths generally ranging from 0.76 to 3 millimeters (0.03 to 0.12 inches). This diminutive size contributes to their elusive nature.
Why are Mysmenidae spiders not well known?
Their lack of widespread recognition is due to their extremely small size and their cryptic, secretive behavior, which makes them difficult to find and study.
Related Spider species
Agelenidae
The Agelenidae, commonly known as funnel weavers, are a large family of spiders found globally. They are distinguished by their fast running speeds and the construction of flat sheet webs with a funnel-shaped retreat. While most species are solitary, some African species exhibit parasocial behavior, living in communal webs.

Amaurobiidae
Amaurobiidae is a family of spiders characterized by their three-clawed feet and the presence of either a cribellum or its absence. These spiders are typically found in crevices, hollows, or under stones, where they construct retreats and are often captured in pitfall traps. While widespread, they can be challenging to distinguish from closely related spider families.

Anapidae
Anapidae is a diverse family of small spiders, with most species measuring less than two millimeters in length. These spiders are found worldwide, inhabiting leaf litter and moss in rainforest environments. A distinctive characteristic of many Anapidae species is their ability to build small orb webs, often less than three centimeters in diameter.