Two linyphiid spiders, Saitonia kawaguchikonis Saito & Ono, 2001 and Asthenargus niphonius Saito & Ono, 2001 were confirmed from Korea for the first time. Males of S. kawaguchikonis and a female of A. niphonius were collected with pitfall traps in a leaf litter of mixed forests in three National Parks (Hallyeohaesang National Park, Mt. Naejangsan, and Mt. Sobaeksan) during the seasonal surveys for the spider fauna in mountainous terrain from 2018 to 2020. These two species were formerly known from China and Japan, or only from Japan, respectively. The present study describes these two species with measurements, morphological illustrations, and a distribution map. This report adds the genus Asthenargus Simon & Fage, 1922 from Korea to the Korean spider fauna for the first time.

Arcuphantes catillus n. sp., a new species of the genus Arcuphantes Chamberlin and Ivie, 1943 is described from Korea. The present species is distinguishable from its known similar congeners by a conspicuous proximal process and a blunt lateral process of the paracymbium, feathery tipped lamellar extension of the pseudolamella, and bowl-like posterior part of radix. The present new species was collected from the leaf litter layer of mixed forest on a hillock around rice fields with a pitfall trap.

접시거미 4종 을 한국미기록종으로 보고한다; Centromerus sylvaticus (Blackwall,1841) (가우리접시거미), Ryojius japonicus Saito and Ono, 2001 (오이접시거미), Sachaliphantes sachalinensis (Tanasevitch, 1988) (극동접시거미), Tmeticus vulcanicus Saito and Ono, 2001 (화산애접시거미). 4속 역시 한국미기록속이다; Centromerus Dahl,1886 (가우리접시거미속), Ryojius Saito and Ono, 2001 (오이접시거미속), Sachaliphantes Saaristo and Tanasevitch, 2004 (극동접시거미속), Tmeticus Menge, 1868 (유럽애접시거미속). 종의 사진 자료와 진단을 위한 그림이 제공된다.

코뿔애접시거미속 (Walckenaeria)의 3종, 내장애접시거미 (Walckenaeria chikunii), 북방애접시거미 (Walckenaeria furcillata), 계곡애접시거미 (Walckenaeria ichifusaensis), 를 한국미기록종으로 보고한다. 북방애접시거미 (W. furcillata)는 구북구에 널리 분포하고 있으나, 내장애접시거미 (W. chikunii)와 계곡애접시거미 (W. ichifusaensis)는 일본내의 모식산지에서만 알려져 있다. 사진과 진단형질의 그림을 첨부하였다.

Five erigonine spider species are described with illustrations: a new species, Saitonia pilosus n. sp., and four records new to the Korean spider fauna, Ceratinella brevis (Wider, 1834), Erigone atra Blackwall, 1833, Maso sundevalli (Westring, 1851), and Parasisis amurensis Eskov, 1984. The occurrences of four spider genera, Ceratinella Emerton, 1882, Maso Simon, 1884, Parasisis Eskov, 1984, and Saitonia Eskov, 1992, are also new to Korea.

지금까지 국내에 알려져 있지 않던 접시거미과의 미기록종인 점봉접시거미(Pacifiphantes zakharovi Eskov et Marusik, 1994)(신칭)을 기재하였다. Pacifiphantes속은 한국에서는 처음으로 기록되는 속이다.