Discover the Phonognatha, a unique genus of spiders from the South Pacific orb-weaver family. With around four species identified by April 2019, these spiders have an interesting history. Originally part of the Tetragnathidae family, also known as long-jawed orb weavers, they’ve since found their own classification.
Size: They are 6mm to 12 mm (0.23 inches to 0.47 inches) in length, with females being larger than males.
Color: Most of them have a brown or reddish-brown body with the patterns and stripes differing from one species to the other. For instance, the leaf spider (Phonognatha graeffei) has a cream pattern on its back.
Other Characteristic Features: The Phonognatha graeffei has a body that is fat and oval-shaped while their legs are long and tapering. Similarly, other species of this genus display different physical features.
Eggs
The eggs are small and round. The Phonognatha graeffei lays its eggs within a curled leaf.
Spiderlings
Though not much information is available regarding the spiderlings of this genus, they disperse to be on their own after maturation.
The Web
Their webs are messy, looking like an incomplete circle, having a curled leaf at the center.
Are Phonognatha Spiders Venomous?
Yes, Phonognatha spiders have venom, but it’s mainly used to subdue their prey.
Can Phonognatha Spiders Bite?
Phonognatha spiders can bite if threatened, but their bite is usually harmless to humans and causes only minor discomfort.
Ecological Importance and Behavior of Phonognatha Spider
The Phonognatha spiders play a vital role in maintaining the ecological balance within their habitats. By preying on a variety of insects, they help control pest populations, contributing to the overall health of the ecosystems they inhabit.
Natural Predator and Prey-Predator Dynamics: In the wild, Phonognatha spiders are not without their adversaries. They fall prey to parasitic wasps and birds, creating a delicate balance in the food web. The dynamics between the Phonognatha spiders, their prey, and their predators paint a vivid picture of life’s interconnectedness, showcasing the importance of each species in sustaining the natural order.
Relationship with Humans: While their presence in gardens and urban areas might bring them into close proximity to humans, Phonognatha spiders are generally harmless and tend to keep to themselves. Their bites are rare and cause only minor discomfort, making them a relatively benign member of the spider world from a human perspective.
Quick Facts
Lifespan
About one year
Distribution
Throughout Australia
Habitat
Forests, woodlands as well and gardens in the urban and suburban areas
Predators
Parasitic wasps and birds
Diet
Insects
Did You Know
French naturalist Eugene Simon was the first to describe this genus in the year 1895.
The leaf spider or Phonognatha graeffei is the most popular species of this genus.
In summary, by understanding the unique characteristics, ecological role, and behavior of the Phonognatha spiders, we gain insight into their world and the vital part they play in maintaining the balance of nature.
A Phonognatha spider has a brown or reddish-brown body, often with species-specific patterns like the cream markings on Phonognatha graeffei. Adults measure 6mm to 12mm, with females being larger than males. Their bodies are typically fat and oval-shaped, complemented by long, tapering legs for web navigation.
No, Phonognatha spiders are not considered dangerous to humans. While they possess venom to subdue prey and can bite if threatened, their bite typically causes only minor, localized discomfort. They are not aggressive, and bites are uncommon, usually occurring only when the spider is directly provoked or handled.
Phonognatha spiders build messy, incomplete circular orb webs that are easily identifiable. A key feature of their web is a curled, dead leaf suspended near the center. This leaf serves as a protective retreat for the spider, where it hides from predators and waits for unsuspecting prey.
The Phonognatha genus belongs to the South Pacific orb-weaver spider family. Although they were originally classified within the Tetragnathidae family, also known as long-jawed orb weavers, they have since been moved to their own distinct classification based on unique characteristics observed by arachnologists over time.
Adult Phonognatha spiders reach a body length between 6mm and 12mm (0.23 to 0.47 inches). As is common with many spider species, there is a size difference between sexes, with the female Phonognatha typically growing noticeably larger than her male counterpart within the same species.
The Phonognatha graeffei, or leaf-curling spider, lays its small, round eggs within the safety of a curled leaf. This leaf is strategically incorporated into the center of its web, providing a camouflaged and protected nursery for the egg sac until the spiderlings are ready to hatch.
Phonognatha spiders play a vital ecological role by helping to control insect populations. As predators, they prey on a wide variety of insects, contributing to the natural balance within their habitats. This predation helps maintain the overall health of the ecosystem by preventing certain insect species from becoming overabundant.
Dr Richard J. Pearce (PhD) on September 6, 2019.
Spider Team
