Description: It is a large beetle belonging to the family Cerambycidae, notable for its robust and elongated body and for the strong contrast between the thorax and the dark, almost black elytra, which give rise to its specific name. The antennae are long and well developed, especially in males, often reaching or exceeding the body length. The body surface is generally dull and slightly rough, and the mandibles are strong and prominent, adapted to its lifestyle.

Geographic distribution: It is distributed in South America, with records mainly from regions of the Southern Cone. Its occurrence is closely associated with areas where forested environments or remnants of native vegetation persist.

Habitat: It inhabits forests, native woodlands, and tree-covered areas, both in relatively well-preserved environments and in rural landscapes with mature trees. Adults are usually found on trunks or thick branches, while larvae develop inside the wood.

Feeding: During the larval stage it is xylophagous, feeding on decaying or weakened wood where it excavates deep galleries. Adults show limited or supplementary feeding, sometimes consuming sap or plant exudates, or remaining largely non-feeding depending on environmental conditions.

Behavior: It shows mainly crepuscular and nocturnal habits, with adults becoming active during low-light hours. It is a slow-moving species that relies on its size and coloration for concealment. When threatened, it may adopt a defensive posture using its mandibles.

Reproduction: Reproduction is sexual, and females lay eggs in bark crevices or exposed wood. Larvae undergo a prolonged development that may last several months or even years, depending on substrate quality and environmental conditions. Pupation takes place within the wood.

Conservation status: It has not been formally assessed at a global level and does not have an assigned conservation category. Although it is not currently considered threatened, forest habitat loss and logging activities may negatively affect local populations.

Author of this compilation: EcoRegistros – 22/12/2025