Matidia is a genus of southeast Asian sac spiders first described by Tamerlan Thorell in 1878. They are nocturnal spiders with long, slender bodies of greenish coloration.

Species it contains seventeen species: Matidia bipartita Deeleman-Reinhold, 2001 – Indonesia (Moluccas) Matidia calcarata Thorell, 1878 – Indonesia (Ambon) Matidia chlora Chrysanthus, 1967 – New Guinea Matidia flagellifera Simon, 1897 – Sri Lanka Matidia incurvata Reimoser, 1934 – India Matidia mas Deeleman-Reinhold, 2001 – Thailand Matidia missai Versteirt, Baert & Jocqué, 2010 – New Guinea Matidia muju Chrysanthus, 1967 – New Guinea Matidia paranga (Barrion & Litsinger, 1995) – Philippines Matidia simia Deeleman-Reinhold, 2001 – Indonesia (Sulawesi) Matidia simplex Simon, 1897 – Sri Lanka Matidia spatulata Chen & Huang, 2006 – China, Taiwan Matidia strobbei Versteirt, 2010 – New Guinea Matidia trinotata Thorell, 1890 – Malaysia Matidia virens Thorell, 1878 (type) – Indonesia (Moluccas, Sulawesi) Matidia viridissima Strand, 1911 – Indonesia (Aru Is.) Matidia xieqian Yu & Li, 2021 – China

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