Linyphiidae Blackwall, 1859

Family |   ACCEPTED
N.B.: for comments on relationships, see Michalik & Hormiga, 2010: 7; re-synonymization of Pimoidae (Murphy & Roberts, 2015: ix) not sufficiently justified and is not accepted here; Sinopimoidae Li & Wunderlich, 2008 [urn:lsid:nmbe.ch:spiderfam:0112] synonymyized with Linyphiidae by Dimitrov et al., 2017: 245; resurrection of Sinopimoidae by Wunderlich, 2020b: 20 is not accepted here, because Dimitrov et al., 2017 was not taken into account; re-elevation of Sinopimoidae to family level by Eskov & Marusik, 2023: 343 not accepted here (by majority vote of the WSC boards); the current status of Sinopimoidae is also maintained for reasons of stability and we wait for a probable confirmation or rejection of this resurrection; Tian et al., 2022 show five subfamilies: Linyphiinae (incl. Mynogleninae  Lehtinen, 1967: 250 and Dubiaraneinae Millidge, 1993c: 145), Erigoninae Emerton, 1882: 7, Micronetinae Hull, 1920a: 8, Ipainae Saaristo, 2007b: 34 and Stemonyphantinae Wunderlich, 1986: 120; da Silva-Moreira, Kulkarni & Hormiga, 2025: 60-62 list resp. newly circumscribe six subfamilies: Erigoninae, Lepthyphantinae Simon, 1929: 562, Linyphiinae (syn. nov.: Dubiaraneinae), Mynogleninae, Pocobletinae Silva-Moreira & Hormiga, 2025: 61 (new subfamily) and Stemonyphantinae, state Ipainae and Micronetinae to be polyphyletic, leave several linyphiid clades unranked and also several genera as incertae sedis.
Gen. Helsdingenia Saaristo & Tanasevitch, 2003 urn:lsid:nmbe.ch:spidergen:03529
type Lepthyphantes ceylonicus van Helsdingen, 1985; gender feminine

In synonymy:

Helsdingenia bifurca (Locket, 1968) = Helsdingenia extensa (Locket, 1968) (van Helsdingen, 1977: 171, sub Lepthyphantes)

Helsdingenia ceylonica (van Helsdingen, 1985) | | Nepal, Sri Lanka urn:lsid:nmbe.ch:spidersp:011127 TYPE SPECIES
Lepthyphantes ceylonicus van Helsdingen, 1985b: 20, f. 9-10 (Df) Original description
Helsdingenia ceylonica Saaristo & Tanasevitch, 2003a: 155, f. 1-9 (Tf from Lepthyphantes, Dm)
Helsdingenia extensa (Locket, 1968) | | St. Helena, Africa, Madagascar, Comoros urn:lsid:nmbe.ch:spidersp:011160
Lepthyphantes extensus Locket, 1968: 96, f. 23A-C, 24A-C (Df) Original description
Lepthyphantes bifurcus Locket, 1968: 88, f. 16A-C (Dm; f f. 16D-E see Lepthyphantes locketi) [urn:lsid:nmbe.ch:spidersp:065057]
Lepthyphantes extensus van Helsdingen, 1977: 171, f. 72e-g, 73a-f (mf, S of Lepthyphantes bifurcus)
Helsdingenia extensa Saaristo & Tanasevitch, 2003a: 155 (T from Lepthyphantes)
Helsdingenia hebes (Locket & Russell-Smith, 1980) | | Nigeria, Cameroon urn:lsid:nmbe.ch:spidersp:011172
Lepthyphantes hebes Locket & Russell-Smith, 1980: 88, f. 128-132 (Dmf) Original description
Helsdingenia hebes Saaristo & Tanasevitch, 2003a: 156 (Tmf from Lepthyphantes)
Helsdingenia hebesoides Saaristo & Tanasevitch, 2003 | | Indonesia (Sumatra) urn:lsid:nmbe.ch:spidersp:038549
Helsdingenia hebesoides Saaristo & Tanasevitch, 2003a: 156, f. 10-16 (Dmf) Original description

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