Thianella is a possible monotypic genus of jumping spiders containing the single species, Thianella disjuncta. It was first described by Embrik Strand in 1907,[1] and is found only on Java.[2] Based on a male specimen, Roewer placed it close to Thiania, but his placements of salticids have often been questionable and no drawings currently exist.[3] The name is an alteration of the salticid genus Thiania, and the species name is from Latin Latin: disiunctus "separated". The World Spider Catalog regards the genus and species names as nomina dubia (dubious names).
In 1963, Schenkel named a new genus "Thianella", but this was invalid because of the prior existence of Strand's Thianella. The replacement name Tasa was put forward by Wanda Wesołowska in 1981.[4]