Flat Rock Scorpion

Flat rock scorpions, belonging to the genus Hadogenes, are native to rocky habitats across southern Africa and are renowned for having one of the most extremely flattened body forms of any scorpion, an adaptation that allows them to wedge into narrow cracks and crevices in exposed rock faces where few other animals can follow. Despite their impressively long, whip-like tails, which contribute to making them among the longest scorpions in the world, they possess unusually small stingers and rely far more on their well-developed pincers to subdue prey.

Their dorsoventrally flattened body, dark brown to blackish coloration, and elongated, multi-segmented tail give them a distinctive silhouette unlike most other scorpion families. The genus contains numerous species distributed across a range of rocky habitats, from open granite outcrops to shaded cliff faces.

Flat rock scorpions are slow-moving and highly sedentary compared to many other scorpions, often remaining within the same crevice system for extended periods and only venturing a short distance to forage at night.

• Extremely flattened, dorsoventrally compressed body, unusually thin compared to most other scorpion families.
• Dark brown to blackish coloration overall, sometimes with slightly paler leg segments.
• Exceptionally long, segmented tail (metasoma) that can make up a large portion of total body length, ending in a comparatively small, slender stinger.
• Robust, well-developed pincers (pedipalps) that are proportionally large relative to the flattened body and tail.
• Among the longest scorpions in the world by total length, with some individuals reaching 200 mm or more including the tail.

Flat rock scorpions are native to southern Africa, particularly South Africa and neighboring countries, where they inhabit exposed granite and sandstone rock formations, boulder fields, and cliff faces. They wedge themselves into narrow horizontal or vertical crevices during the day, sometimes occupying the same crevice for years, and emerge at night to forage on the rock surface nearby. Their distribution is closely tied to the availability of suitable rock crevice habitat rather than broader climatic zones.

These scorpions are nocturnal predators that rely primarily on their strong pincers rather than their sting to capture and crush prey, which mainly consists of insects and other small arthropods found on or near their rock crevice home. They are notably slow-moving and sedentary, showing strong site fidelity to a particular crevice, and are thought to be relatively long-lived compared to many other scorpion species. Within their rocky habitat, they function as significant nocturnal predators of arthropods and are themselves prey for certain birds and reptiles adapted to foraging on rock faces.

Flat rock scorpions reproduce in the ovoviviparous manner typical of scorpions, with females giving birth to live young after an internal gestation period rather than laying eggs. Newborn scorpions climb onto the mother's back and remain there for protection until after their first molt. Because of their sedentary lifestyle, members of this genus are believed to grow slowly and take several years to reach sexual maturity, with adults potentially living considerably longer than many other scorpion species.