Susiformavo

Susiformavo is a genus of large, terrestrial mammals that belong to the family Suidae. First described in 2015 by the Japanese mammalogist Hideki Sato following a series of expeditions in the central highlands of Southeast Asia, the genus contains a single extant species, Susiformavo murakami, named in honour of the survey field leader. The generic name derives from the Latin words *sus* meaning “pig” and *forma* meaning “form”, while *avo* is an ancient suffix used for pig‑like forms.

Morphologically, Susiformavo murakami is distinguished from other suids by its comparatively elongated snout, a robust shoulder girdle, and a dense, dark brown coat. Adult individuals typically reach a shoulder height of 75–90 centimetres and weigh between 120 and 200 kilograms. The species possesses a short, rounded tail and a highly adaptable dentition that includes a robust malleus, allowing it to forage on a wide variety of plant material and occasional invertebrate prey. Behaviorally, it is primarily diurnal and forms small family groups that move in a linear fashion through the forest understory. The species is noted for its vocalizations, which include low-frequency grunts and high-pitched squeals used during mating displays.

Susiformavo murakami is endemic to the limestone karst forests of the northern montane region of Laos and adjacent areas of western Thailand. It occupies elevations between 1,200 and 1,800 metres, where it relies on bergamot shrubs and bamboo understory for cover. The species is adapted for a semi-aquatic lifestyle, frequently foraging in shallow streams and river valleys.

Because of its restricted range and ongoing habitat loss due to logging and agricultural expansion, the International Union for Conservation of Nature classifies Susiformavo murakami as Vulnerable. Local conservation initiatives aim to protect its habitat through the establishment of community-managed reserves and stricter enforcement of logging regulations. The species also plays an important ecological role as a seed disperser, contributing to the regeneration of forest plant species across its range.

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