The long horned orb-weaver, Macracantha arcuata, is also known as the curved spiny spider. It has two long spines extend from its sides. Usually found in southeast Asia and India. It can also be found in parts of the southeast United States where it is an introduced species. Macracantha is a genus of spiders in the Araneidae family. As of 2018, Macracantha arcuata is the only species in the genus.