WArctobius is a genus of tangled nest spiders containing the single species, Arctobius agelenoides. It was first described by Pekka T. Lehtinen in 1967, with a holarctic distribution.
WBrigittea is a genus of araneomorph spiders in the family Dictynidae, first described by Pekka T. Lehtinen in 1967.
WCozyptila is a genus of crab spiders that was first described by Y. M. Marusik, Pekka T. Lehtinen & M. M. Kovblyuk in 2005. As of July 2020 it contains three species, found in Europe and on Cyprus: C. blackwalli, C. guseinovorum, and C. nigristernum.
WEbelingia is a genus of Asian crab spiders consisting of two species separated from Mecaphesa due to their distinct abdominal pattern and the unique color pattern of their body and legs. As of September 2020 it contains two species found throughout Asia: E. hubeiensis and E. kumadai.
WHackmania is a genus of cribellate araneomorph spiders in the family Dictynidae, and was first described by Pekka T. Lehtinen in 1967. As of May 2019 it contains only two species: H. prominula and H. saphes.
WKukulcania is a genus of crevice weavers that was first described by Pekka T. Lehtinen in 1967. It is named after Kukulkan, a Mesoamerican serpent deity.
WMegadictynidae is a family of araneomorph spiders first described by Pekka T. Lehtinen in 1967. They are endemic to New Zealand.
WNigma is a genus of cribellate araneomorph spiders in the family Dictynidae, and was first described by Pekka T. Lehtinen in 1967. They have a wide distribution, including Eurasia, North America, and Northern Africa. N. walckenaeri is one of the biggest members of the Dictynidae, growing up to 5 millimetres (0.20 in) long. They are translucent green and sometimes have red or black markings on the abdomen.
WPandava is a genus of araneomorph spiders in the family Titanoecidae.
WPhyxelididae is a family of araneomorph spiders first described by Pekka T. Lehtinen in 1967 as a subfamily of Amaurobiidae, and later elevated to family status as a sister group of Titanoecidae.
WPritha is a genus of crevice weavers that was first described by Pekka T. Lehtinen in 1967.
WTangaroa is a genus of South Pacific cribellate orb-weavers first described by Pekka T. Lehtinen in 1967.
WTitanoecidae is a family of araneomorph spiders first described by Pekka T. Lehtinen in 1967. It is fairly widespread in the New World and Eurasia with five genera and more than 50 species worldwide. These are mostly dark-colored builders of "woolly" (cribellate) silk webs. Several species are found at relatively high altitudes in mountain ranges and may be very common in such habitats.
WVidole is a genus of African araneomorph spiders in the family Phyxelididae, and was first described by Pekka T. Lehtinen in 1967.
WViridasiidae is a family of araneomorph spiders split from the family Ctenidae in 2015.
WZaitunia is a genus of crevice weavers that was first described by Pekka T. Lehtinen in 1967.