Schwenckfeldina tridentata (Ruebsaamen, 1898)

Synonyms.

= atrata (Holmgren, 1869) [preocc.]; = holmgreni (Jacobson, 1898) [preocc.]; = incisiforceps (Frey, 1948), = laguncularis (Lengersdorf, 1930); = validicornis (Lundbeck, 1898).

Literature.

Faunistics: Holmgren (1869): 15, 51 [as Sciara atrata]; Edwards (1922): 196; Edwards (1923): 236; Summerhayes and Elton (1923): 240 [all as Sciara tridentata]; Lengersdorf (1930a): 55 [as Sciara atrata]; Lengersdorf (1930c): 52 [as Rhynchosciara laguncularis]; Thor (1930): 31; Edwards (1935): 532 [both as Sciara tridentata]; Frey (1948): 77, 89 [as Bradysia (Neosciara) incisiforceps]; Tuomikoski (1967): 46 [as Schwenckfeldina tridentata]; Menzel and Mohrig (2000): 513 [as Sciara atrata and Rhynchosciara laguncularis under Schwenckfeldina tridentata]; Coulson and Refseth (2004): 103; Hågvar et al. (2007): 67; Coulson (2008): 162; Coulson (2013): 155; Mohrig et al. (2013): 246 [all as Schwenckfeldina tridentata]. Taxonomy: Tuomikoski (1966): 137; Tuomikoski (1967): 45; Menzel and Mohrig (2000): 513; Mohrig et al. (2013): 246 [all as Schwenckfeldina tridentata].

Localities.

• Jan Mayen: without further locality details (= 'Jan Mayen Island’) • Svalbard; Bjørnøya (= 'Bear Island’) • Bjørnøya, bay Austervåg at the E coast (= 'bei Austervåg (B.)'; = 'Spitzbergen, bei Austervåg’) • Bjørnøya, Brettingsdalen at the E side of Miseryfjellet (= 'Bear Island, Brettingsdalen’) • Bjørnøya, Nordcapp at the NE coast (= 'Spetsberg, Nordcap’) [misinterpretation in Menzel and Mohrig (2000), not 'Spetsberg, Nordcap (= Spitzbergen, Nordfjorden)'] • Spitsbergen, Adventdalen near Adventfjorden at the W coast (= ‘Adventdalen’) • Spitsbergen, Amsterdamøya, Smeerenburg at the SE coast (= 'in Spetsbergia ad Smeerenberg’; = 'Spitzbergen, Smeerenberg’; = 'Nordfjorden, Smeerenburg’) • Spitsbergen, Bellsund at the W coast (= 'in Spetsbergia ad Belsund’; = ‘Bellsund’; = ‘Belsund’) • Spitsbergen, Grønfjorden (= 'in Spetsbergia ad Green Harbour’; = 'Spetsbergia, Green Harbour’; = 'Spetsbergia ad Green Harbour [Spitzbergen, bei Green Harbour]'; = 'Green Harbour’) • Spitsbergen, Kapp Linné by the Isfjord, Isfjord Radio station (= 'Svalbard, Isfjord Radio’) • Spitsbergen, Kobbefjorden at the NW coast near the Danskøya (= 'in Spetsbergia ad Kobbebay’; = 'Spitzbergen, Kobbebay’; = ‘Kobbebay’) • Spitsbergen, Nordaustlandet (= 'North-East Land’) • Spitsbergen, Nordaustlandet, Murchisonfjorden (= 'North-East Land, Murchison Bay’) • Spitsbergen, Nordfjorden between Bohemanneset and Kapp Thordsen (= 'in Spetsbergia ad Nordfjorden’) • Spitsbergen, Prins Karls Forland at the W coast of Oscar II Land (= 'Prince Charles Foreland (S.)') • Spitsbergen, Prins Karls Forland at the W coast of Oscar II Land, between Richardlaguna and Carmichaelpynten (= 'Spitsbergen, Prince Charles Foreland (North Eastern Region), from Richard Lagoon to Point Carmichael’) • Spitsbergen, Prins Karls Forland at the W coast of Oscar II Land, Carmichaelpynten (= 'Spitsbergen, Prince Charles’ Foreland, Pt. Carmichael, Freshwater Bay district, N.E. of island’) • Spitsbergen, Prins Karls Forland at the W coast of Oscar II Land, Ferskvassbukta at the NE coast (= 'Prince Charles Foreland, Freshwater Bay’) • Spitsbergen, S coast of Kongsfjorden, W of Ny-Ålesund (= 'NW Spitsbergen, South coast of Kongsfjord, W of Ny Ålesund’) • Spitsbergen, without further locality details (= 'Spetsbergen; = ‘Spitsbergen’; = ‘Spitzbergen’).

Ecological note.

In dry ridges and slopes with Saxifraga oppositifolia, mosses and lichens; in mosses and lichens; among stones and plants (e.g. Buellia sorotia, Dicranoweisia crispula, Parmelia alpicola, Saxifraga oppositifolia, Salix polaris); on stones of shingly raised beaches (all Svalbard records). Phenology: Jun.-Jul., Sep.