Alabaster Cave Harvestman (Banksula californica)
The Alabaster Cave Harvestman was described in 1900; it is known only from a cave named Alabaster Cave in the El Dorado County of California, USA.
The species reached a body length of only about 0,2 cm, it also had quite short legs for a harvestman.
The only known locality has been destroyed by mining and has furthermore be sealed by concrete, thus making surveying impossible; the species might still be around but is, however, considered likely extinct.
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edited: 16.05.2022