Kryptonesticus is a genus of European scaffold web spiders first described by Pavlek & Ribera in 2017, based around the newly described type species Kryptonesticus deelemanae and seven species transferred from genus Nesticus. In 2018, an additional species, K. georgescuae, was described from two female specimens from Romania.

With the exception of K. eremita, individual species have very restricted ranges.

Species Kryptonesticus comprises the following species, per the World Spider Catalog: Kryptonesticus arenstorffi (Kulczyński, 1914) — Bosnia-Hercegovina Kryptonesticus beroni (Deltshev, 1977) — Bulgaria Kryptonesticus beshkovi (Deltshev, 1979) — Crete Kryptonesticus deelemanae Pavlek & Ribera, 2017 — Croatia Kryptonesticus dimensis (López-Pancorbo, Kunt & Ribera, 2013) — Turkey Kryptonesticus eremita (Simon, 1879) — Europe; introduced in New Zealand Kryptonesticus fagei (Kratochvíl, 1933) — Italy, Montenegro Kryptonesticus georgescuae Nae et al., 2018 — Romania Kryptonesticus henderickxi (Bosselaers, 1998) — Crete

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