Trechaleidae

Family Trechaleidae

Common Name

Fishing Spiders

Overview

Trechaleidae is a family of araneomorph spiders, noted for their semi-aquatic lifestyles. These spiders are widely distributed in the Neotropics and are known for their strong hunting capabilities both on land and water surfaces.

Taxonomy

  • Kingdom: Animalia
  • Phylum: Arthropoda
  • Class: Arachnida
  • Order: Araneae
  • Infraorder: Araneomorphae
  • Family: Trechaleidae

Key Characteristics

  • Body Size: Generally medium-sized, ranging from 3 to 20 mm.
  • Appearance: They possess long legs adapted for running and an elongated body.
  • Coloration: Variety of colors, often brown with distinct patterns or markings.
  • Eyes: 8 eyes arranged in three distinct rows.
  • Adaptations: Hydrophobic hairs on legs allowing them to walk on water surfaces.

Life Cycle

  • Eggs: Laid in a silken sac, often guarded by the female.
  • Juveniles: Hatch from eggs and go through several molts before reaching adulthood.
  • Adults: Active hunters, usually found near water bodies.

Behavior and Ecology

  • Habitat: Prefers humid environments near streams, rivers, and ponds.
  • Diet: Predominantly insects, sometimes small fish.
  • Behavior: Notable for their ability to hunt on water surfaces, using vibrations to detect prey.

Notable Species

  • Paratrechalea ornata: Known for its distinctive marking and mating rituals.
  • Enna minor: Smaller species widely studied for its unique hunting techniques.
  • Trechalea extensa: Prominent for its considerable size and web-building.

Conservation

Currently, no species within the family Trechaleidae are listed as endangered, but their reliance on aquatic habitats makes them susceptible to water pollution and habitat destruction.

Significance to Humans

Trechaleid spiders help control insect populations, thus maintaining ecological balance. Their unique hunting techniques are of interest in studies of behavior and locomotion.

Fun Facts

  • Hydrophobic Legs: Trechaleid spiders can walk on water due to specialized, water-repellent hairs on their legs.
  • Vibrational Communication: They can detect minute vibrations on water to locate prey.
  • Parental Care: Females are known to guard their egg sacs and sometimes carry them around.
  • Speed: Some species can run just as fast on water surfaces as they do on land.