One of two species in the genus, endemic to Aotearoa.

The larvae are common in gravelly, stony, or muddy streams, preferring good water quality. Both species build long narrow cases - Hudsonema alienum attachs rectangular plant fragments in neat spirals along the case, and the stripy-legged Hudsonema amabile uses sand grains.

It's not sure whether they're predators or herbivores - they might be both.