Nesticella marapu is an eyeless spider from Sumba

Sumba

Sumba is an island in eastern Indonesia, is one of the Lesser Sunda Islands, and is in the province of East Nusa Tenggara. Sumba has an area of 11,153 km², and the population was officially at 611,422 in 2005...

, Indonesia

Indonesia

Indonesia , officially the Republic of Indonesia , is a country in Southeast Asia and Oceania. Indonesia is an archipelago comprising approximately 13,000 islands. It has 33 provinces with over 238 million people, and is the world's fourth most populous country. Indonesia is a republic, with an...

. It has long legs and weak pigmentation. It is distinguished by all other species in the genus Nesticella

Nesticella

Nesticella is a genus of spiders that occurs from Russia to Japan, down to Indonesia and several other islands, including New Guinea. It includes a blind spider, Nesticella marapu.-Species:* Nesticella aelleni...

by the beak-shaped paracymbium.

The species is of a bright yellow color, with a body length of less than 3mm, males being a bit smaller.
Of the eyes, not even eye sockets are visible.

It is only known from the 3 km long Marro cave close to Kabalidana, west of Waimangura.