Selenocosmiinae sp. ‘Albognathus’ (Borneo Black Leg)

The Borneo Black Leg (often referred to in the hobby as the “White-Jawed Earth Tiger”) is a striking Old World fossorial species from the dense, humid jungles of Borneo. Known for its high-contrast aesthetics and rapid growth, it is a quintessential “Earth Tiger” that appeals to keepers who appreciate raw power and architectural silk-work.

Key Highlights

• Visual Contrast: This species is prized for its unique color blocking. It typically features light tan or golden-grey tones on the cephalothorax and abdomen, which contrast sharply against deep black or dark chocolate-colored legs. Its most distinctive feature is the pale, almost white “mustache” or hairs around the chelicerae (jaws).

• Defensive Nature: True to its Selenocosmiinae roots, the ‘Albognathus’ is extremely fast and possesses a classic Old World temperament. It is highly defensive and will not hesitate to give a threat posture or bite if provoked.

• Stridulation: Like many in this subfamily, they are capable of making a “hissing” sound (stridulation) by rubbing specialized hairs together when they feel threatened—a fascinating auditory experience for the keeper.

• Size: A medium-to-large species, reaching an adult leg span of approximately 12–14 cm (5–5.5 inches).

Quick Care Stats