Gradungulidae
Some species are web builders, constructing elaborate webs with an upper retreat tangle and connecting threads to a scaffolding that supports a ladder-like catching platform. Others may employ different hunting strategies, though these are not detailed.
Gradungulidae, commonly known as large-clawed spiders, are a family of haplogyne spiders found in Australia and New Zealand. They are distinguished by their medium to large size, three claws, and two pairs of book-lungs, features that resemble those of Mygalomorphae. Some species are notable for constructing elaborate webs.
Key Facts
- ›Endemic to Australia and New Zealand.
- ›Medium to large-sized haplogyne spiders.
- ›Possess three claws and two pairs of book-lungs.
- ›Some species build extensive, ground-attached webs.
- ›Includes eight genera and eighteen species as of October 2025.
Large-Clawed Spiders
Australia, New Zealand
Three Claws, Two Pairs of Book-Lungs, Haplogyne Spiders
Web Construction
About Gradungulidae
Gradungulidae: The Large-Clawed Spiders
Gradungulidae, commonly referred to as large-clawed spiders, represent a distinct family of haplogyne spiders endemic to Australia and New Zealand. These spiders are notable for their medium to large size and possess anatomical features such as three claws and two pairs of book-lungs, which bear similarities to those found in the Mygalomorphae suborder. The family comprises eight genera, including Gradungula, Hickmania, Kaiya, Macrogradungula, Pianoa, Progradungula, Spelungula, and Tarlina, with a total of eighteen species documented as of October 2025.
Habitat and Distribution
The geographic distribution of Gradungulidae spiders is confined to Australia and New Zealand. Within these regions, specific species inhabit diverse environments. For instance, some members of the Progradungula genus have been found in cave systems, indicating a potential adaptation to subterranean or sheltered habitats. Their presence across various Australian states and New Zealand underscores their establishment in these Southern Hemisphere ecosystems.
Web Construction and Hunting
A significant behavioral characteristic observed in some Gradungulidae species is their sophisticated web-building. These spiders construct elaborate webs that include an upper retreat tangle, connected by threads to a supporting scaffolding. This structure culminates in a unique, ladder-like catching platform that is secured to the ground. This specialized web design is a primary hunting strategy, enabling them to ensnare prey. While this method is well-documented for certain species, the hunting strategies of all members of the family may not be uniform.
Taxonomy and Species
The family Gradungulidae is a part of the Araneomorphae suborder. As of October 2025, the family includes eight genera: Gradungula, Hickmania, Kaiya, Macrogradungula, Pianoa, Progradungula, Spelungula, and Tarlina. Each of these genera contains one or more species, with notable examples including Gradungula sorenseni from New Zealand and Hickmania troglodytes from Tasmania. The genus Progradungula is particularly known for species like Progradungula carraiensis, found in New South Wales, Australia, which has been associated with cave environments.
Source: Wikipedia ↗
Frequently Asked Questions
What are the defining characteristics of Gradungulidae spiders?
Gradungulidae spiders are characterized by their medium to large size, haplogyne nature, and the presence of three claws. They also possess two pairs of book-lungs, which are similar to those found in Mygalomorphae spiders.
Where are Gradungulidae spiders found?
This spider family is endemic to the regions of Australia and New Zealand. Specific species have been documented in various Australian states and New Zealand.
Do all Gradungulidae spiders build webs?
Not all species within the Gradungulidae family construct webs. However, some species are known to build extensive webs that feature an upper retreat tangle and connecting threads to a scaffolding, supporting a ladder-like catching platform glued to the ground.
How many genera and species are in the Gradungulidae family?
As of October 2025, the Gradungulidae family includes eight genera and eighteen species. These genera include Gradungula, Hickmania, Kaiya, Macrogradungula, Pianoa, Progradungula, Spelungula, and Tarlina.
What is the scientific classification of Gradungulidae?
Gradungulidae is a family of spiders within the order Araneomorphae. They are haplogyne spiders, meaning they lack certain anatomical features found in other spider groups.
Related Spider species
Dipluridae
Dipluridae, commonly known as curtain-web spiders, are a family of mygalomorph spiders characterized by two pairs of booklungs and stabbing chelicerae. While historically encompassing genera now moved to other families, the current Dipluridae are primarily found in South America and the Caribbean, known for building messy funnel-webs or silk-lined burrows.
Deinopidae
Deinopidae, commonly known as net-casting spiders, are a family of circumtropical cribellate spiders recognized for their unique hunting strategy. These stick-like spiders catch prey by stretching a specialized web between their front legs and then propelling themselves forward, entangling their victims. Their exceptional night vision, facilitated by large posterior median eyes, allows them to hunt effectively in low-light conditions.
Hypochilidae
Hypochilidae, commonly known as lampshade spiders, represent one of the most primitive lineages within the araneomorph spiders. These long-legged arachnids are characterized by their distinctive "lampshade" style webs, typically constructed under overhangs and within caves. The family is distributed across North America and China, with most species found in mountainous regions.