Anyphaenidae

Common Name

Ghost Spiders

Overview

Anyphaenidae, commonly known as ghost spiders, is a family of araneomorph spiders. They are primarily known for their nocturnal habits and the ability to move swiftly between leaves, which they often use to make their shelters.

Taxonomy

Key Characteristics

  • Size: Small to medium-sized spiders, typically 3-10 mm.
  • Coloration: Varies from pale to dark, often with markings on their abdomen.
  • Eyes: Eight eyes arranged in two rows.
  • Legs: Long and slender, adapted for running.
  • Opisthosoma (abdomen): Usually oval or elongated.

Life Cycle

Ghost spiders undergo the typical arachnid life cycle: egg, several juvenile stages (instars), and adult. They lay eggs in silken sacs which are often hidden under leaves or bark.

Behavior and Ecology

Ghost spiders are nocturnal hunters, primarily feeding on other small arthropods. They do not build webs to catch prey but use their silk to create shelters and egg sacs. Their movement is swift and agile, allowing them to evade predators and catch prey with relative ease.

Notable Species

  • Anyphaena accentuata: Commonly found in Europe, notable for its distinctive markings.
  • Aysha velox: Found in the Americas, recognized for its speed and nocturnal activity.

Conservation

Currently, there are no significant conservation concerns specific to the Anyphaenidae family. They are generally common and widespread, thriving in various habitats, including forests, grasslands, and human dwellings.

Significance to Humans

Ghost spiders are generally harmless to humans and can be considered beneficial as they help control pest populations. They do not display any aggressive behaviors towards humans and are unlikely to bite unless provoked.

Fun Facts

  • Ghost spiders are named for their swift and elusive movement, often seen darting around at night.
  • Some species produce a faint squeaking sound, which they create by rubbing legs against their body.
  • Despite their nocturnal habits, some species can be found during the day hiding under leaves or bark.
  • They have nocturnal habits, which means you’re more likely to encounter them at night when they are actively hunting.