Represents a highly specialized group of heavy-bodied, wingless stick insects belonging to the family Agathemeridae, distinct for their robust build and unique defense mechanisms suited for harsh environments.

This taxon features an exceptionally stout and dorsoventrally flattened body, lacking wings in both developmental sexes. Notable sexual dimorphism is observed, with females being considerably larger and bulkier, reaching lengths of 60 to 85 millimeters, whereas males are much smaller, generally measuring between 35 and 50 millimeters. The overall coloration is highly cryptic, ranging from pale yellowish, grayish-brown, to olive-green, frequently marked with dark longitudinal stripes and a rugose, leathery exoskeleton that mimics the texture of rocks and native bark. The head is subquadrate with relatively short antennae. A key diagnostic feature is the presence of specialized prothoracic glands that produce and forcefully spray a volatile, highly pungent chemical fluid when the insect is disturbed.

Geographical distribution: This species is endemic to the temperate and cold-arid regions of southwestern South America. Its range is primarily restricted to the Andean and pre-Andean areas of central and southern Chile, as well as the western steppe regions of Argentina, encompassing the provinces of Mendoza, Neuquén, Río Negro, and Chubut. Its distribution is closely linked to both slopes of the southern Andes Mountains.

Habitat: It occurs mostly in the Patagonian steppe, high-altitude Andean scrublands, and sclerophyllous shrub forests at elevations that often exceed 1500 meters above sea level. They are commonly found under large volcanic rocks, deep soil crevices, fallen logs, or clustered at the base of dense, thorny shrubs, which provide crucial microclimatic stability against extreme temperature fluctuations and dry winds.

Feeding: Classified as strictly phytophagous, this insect feeds on the leaves, buds, and tender stems of native flora. It shows a strong dietary preference for plants within the Anacardiaceae family, particularly the shrub known as "molle" (Schinus polygama and Schinus johnstonii), but will also consume foliage from other desert-adapted woody plants typical of the Andean-Patagonian transition zone.

Behavior: It exhibits predominantly nocturnal and crepuscular activity patterns to minimize water loss and evade visual predators like lizards and birds. During the day, individuals remain motionless and hidden under cover. When threatened, they employ an aggressive chemical defense, spraying a pungent, milky fluid capable of causing severe irritation, temporary blindness, and burning sensations in the eyes and mucous membranes of potential predators, accompanied by an intensely persistent odor.

Reproduction: This species is oviparous and relies on sexual reproduction. Mating occurs during the warm summer months, after which the female deposits large, seed-like eggs individually into the soil, sandy substrates, or leaf litter. The eggs possess a thick, highly resilient chorion designed to withstand freezing temperatures and desiccation during the Andean winter. The nymphs hatch during the following spring, undergoing several successive molts before reaching maturity.

Conservation status: It is currently listed as Not Evaluated (NE) on the global IUCN Red List. However, localized populations are increasingly threatened by habitat fragmentation, overgrazing by domestic livestock, wildfire frequency, and expanding mining and agricultural operations throughout the fragile arid ecosystems of southern South America.