Soderstrom, , N. A. KONSTANTINOVA, A. HAGBORG, T. PRESTO, K. HASSEL & M. VON KONRAT, N. A. KONSTANTINOVA, A. HAGBORG, T. PRESTO, K. HASSEL & M. VON KONRAT

374 L SÖDERSTRÖM, N.A. KONSTANTINOVA, A. HAGBORG, T. PRESTØ, K. HASSEL & M. VON KONRAT

Frisvoll & Elvebakk 1996, Frisvoll & Blom 1997, Konstantinova & Savchenko 2007, 2008 a, 2008b, Prestø et al. 2014, Konstantinova et al. 2020b.

*** Marsupella boeckii (Austin) Lindb. ex Kaal. View in CoL SVALBARD: Vilnet et al. 2010, Hodgetts 2015, Mamontov et al. 2018, Mamontov et al. 2019, Hodgetts & Lockhart 2020. PRINS OSCARS LAND: Konstantinova & Savchenko 2008 a, Konstantinova & Savchenko 2015.

*** Marsupella condensata (Ångstr. ex C.Hartm.) Lindb. ex Kaal. View in CoL [ Gymnomitrion condensatum Ångstr. ex C.Hartm. View in CoL ]. SVALBARD: Schiffner 1893, Herzog 1926, Arnell 1928, Jørgensen 1934, Frye & Clark 1943, Arnell 1956, Schuster & Damsholt 1974, Schuster 1974, Schljakov 1981, Düll 1983, Smith 1990, Söderström 1995, Paton 1999, Damsholt 2002, Söderström et al. 2002a, Söderström et al. 2002 b, Konstantinova 2003, Damsholt 2013, Hodgetts 2015, Hodgetts & Lockhart 2020, Konstantinova & Savchenko 2020b. BJØRNØYA: Berggren 1875a, Arnell & Mårtensson 1959 [could not trace the collection reported in Berggren 1875], Söderström 1995, Frisvoll & Elvebakk 1996, Frisvoll & Blom 1997, Damsholt 2002, Söderström et al. 2002b. PRINS OSCARS LAND: This publication. ALBERT I LAND: Arnell & Mårtensson 1959, Frisvoll & Blom 1992, 1997, Frisvoll & Elvebakk 1996.

*** Marsupella sprucei (Limpr.) Bernet. View in CoL SVALBARD: Hodgetts 2015, Hodgetts & Lockhart 2020. PRINS OSCARS LAND: Konstantinova & Savchenko 2008 a, 2015. NORDENSKIÖLD LAND: Hadač 1946 [with a?], Konstantinova & Savchenko 2007, 2008 a, 2008b.

Mesoptychia (Lindb.) A.Evans View in CoL

*** Mesoptychia badensis (Gottsche ex Rabenh.) L.Söderstr. et Váňa View in CoL [ Lophozia badensis (Gottsche ex Rabenh.) Schiffn. , Leiocolea badensis (Gottsche ex Rabenh.) Jørg. View in CoL ]. SVALBARD: Schuster 1969, Worley 1972, Schljakov 1980, Düll 1983, Smith 1990, Söderström 1995, Paton 1999, Damsholt 2002, Söderström et al. 2002a, 2002 b, Konstantinova 2003, Hodgetts 2015, Hodgetts & Lockhart 2020. NORDAUSTLANDET: Potemkin 2014 as Mesoptychia badensis var. apiculata View in CoL . GUSTAV V LAND: Konstantinova & Savchenko 2012 also as Leiocolea badensis var. apiculata, Konstantinova et al. 2014 , Konstantinova & Savchenko 2015 as Leiocolea badensis var. apiculata . DICKSON LAND: This publication. HAAKON VII LAND: Arnell & Mårtensson 1959, Frisvoll & Blom 1992, 1997. OSCAR II LAND: Arnell & Mårtensson 1959, Frisvoll & Blom 1992, Frisvoll & Blom 1997. PRINS KARLS FORLAND: Konstantinova & Savchenko 2020a. SØRKAPP LAND: This publication. WEDEL JARLSBERG LAND: Karczmarz & Święs 1990a, Święs & Karczmarz 1991 a, Frisvoll & Elvebakk 1996, Frisvoll & Blom 1997.

* Mesoptychia collaris (Nees) L.Söderstr. et Váňa View in CoL [ Lophozia collaris (Nees) Dumort. , Leiocolea collaris (Nees) Schljakov View in CoL ]. SVALBARD: Berggren 1875b as Jungermannia alpestris, Bryhn 1906 View in CoL as Lophozia Mülleri, Frye & Clark 1945 View in CoL as Leiocolea muelleri, Le Gallo 1951 View in CoL as Leiocolea muelleri, Arnell 1956 View in CoL as Leiocolea muelleri, Schuster 1969 View in CoL as Lophozia collaris, Smith 1990 as Leiocolea alpestris, Söderström 1995 View in CoL [rejecting earlier reports], Frisvoll & Elvebakk 1996 [rejecting earlier reports as probably L. heterocolpos var. arctica View in CoL ], Damsholt 2002 as Lophozia alpestris var. alpestris [with a “?”], Söderström et al. 2002a [rejecting earlier reports], Söderström et al. 2002b [rejecting earli- er reports], Söderström et al. 2007, Damsholt 2013 as Lophozia alpestris, Hodgetts 2015 , Hodgetts & Lockhart 2020. GUSTAV V LAND: Konstantinova & Savchenko 2012. BARENTSØYA: Konstantinova & Savchenko 2018. SPITSBERGEN: Gottsche et al. 1846 as Jungermannia acuta View in CoL [Bellsund], Berggren 1875a as Jungermannia muelleri View in CoL [Bellsund]. DICKSON LAND: This publication. HAAKON VII LAND: This publication. NORDENSKIÖLD LAND: Hagen 1952 as Leiocolea muelleri View in CoL . PRINS KARLS FORLAND: Konstantinova & Savchenko 2020a. SØRKAPP LAND: This publication. WEDEL JARLSBERG LAND: Konstantinova & Koroleva 2003 as Leiocolea alpestris View in CoL .

*** Mesoptychia gillmanii (Austin) L.Söderstr. et Váňa. var. gillmanii View in CoL [ Leiocolea gillmanii (Austin) A.Evans View in CoL , Lophozia gillmanii (Austin) R.M.Schust. ]. SVALBARD: Düll 1983, Söderström 1995, Paton 1999, Damsholt 2002, Söderström et al. 2002a, 2002b, Damsholt 2013, Kosovich-Anderson 2014, Hodgetts 2015, Konstantinova & Savchenko 2020b. GUSTAV V LAND: Frisvoll & Elvebakk 1996, Konstantinova & Savchenko 2012. ANDRÉE LAND: Frisvoll 1981, Frisvoll & Elvebakk 1996, Frisvoll & Blom 1997. DICKSON LAND: Frisvoll 1981, Frisvoll & Blom 1997, Konstantinova & Koroleva 2003 as Leiocolea gillmanii f. orbiculata, Konstantinova & Savchenko 2008 c, 2011 View in CoL . HAAKON VII LAND: Frisvoll 1981, Frisvoll & Blom 1997, Konstantinova & Savchenko 2006, 2008a. JAMES LAND: Frisvoll 1981, Frisvoll & Elvebakk 1996, Frisvoll & Blom 1997. OSCAR II LAND: Borovichev 2010, Koroleva & Borovichev 2014. WEDEL JARLSBERG LAND: This publication.

*** Mesoptychia heterocolpos (Thed. ex Hartm.) L.Söderstr. et Váňa View in CoL [ Lophozia heterocolpos (Thed. ex Hartm.) M.Howe , Leiocolea heterocolpos (Thed. ex Hartm.) H.Buch View in CoL ]. SVALBARD: Worley 1972, Smith 1990, Söderström 1995, Paton 1999, Söderström et al. 2002b, Damsholt 2013. DICKSON LAND: Frisvoll 1981 as cf. heterocolpos, Frisvoll & Elvebakk 1996 View in CoL , Konstantinova & Savchenko 2008c. HAAKON VII LAND: Konstantinova & Savchenko 2006, Konstantinova & Savchenko 2008 a, Konstantinova & Savchenko 2011. HEER LAND: Konstantinova et al. 2020b. NATHORST LAND: This publication. NORDENSKIÖLD LAND: Hadač 1989, Frisvoll & Elvebakk 1996, Virtanen et al. 2013, Prestø et al. 2014. SØRKAPP LAND: Konstantinova et al. 2020b. TORELL LAND: Rejment-Grochowska 1967. WEDEL JARLSBERG LAND: Rejment-Grochowska 1967, Karczmarz & Święs 1989, Karczmarz & Święs 1990 a, Frisvoll & Elvebakk 1996.

** — var. arctica (S.W.Arnell) L.Söderstr. et Váňa View in CoL [ Leiocolea heterocolpos var. arctica (S.W.Arnell) Mårtensson View in CoL , Lophozia heterocolpos var. arctica (S.W.Arnell) R.M.Schust. et Damsh. , Lophozia arctica (S.W.Arnell) Święs et Karczm. nom. inval.]. SVALBARD: Söderström 1995, Damsholt 2002, Söderström et al. 2002a, 2002b both, Damsholt 2003, Hodgetts 2015, Hodgetts & Lockhart 2020. GUSTAV V LAND: This publication. DICKSON LAND: This publication. HAAKON VII LAND: Arnell & Mårtensson 1959, Frisvoll & Elvebakk 1996. WEDEL JARLSBERG LAND: Święs & Karczmarz 1991b.

** — var. harpanthoides (Bryhn et Kaal.) L.Söderstr. et Váňa [ Leiocolea heterocolpos var. harpanthoides (Bryhn et Kaal.) R.M.Schust. ex S.W.Arnell ]. SVALBARD: Söderström et al. 2002 a, Bakalin et al. 2015 [s.loc.spec.], Hodgetts 2015, Hodgetts & Lockhart 2020. NORDAUSTLANDET: Konstantinova & Savchenko 2015. GUSTAV V LAND: Konstantinova & Savchenko 2012. PRINS OSCARS LAND: This publication.

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BARENTSØYA: Konstantinova & Savchenko 2018. DICKSON LAND: This publication. HAAKON VII LAND: Frisvoll 1978. NATHORST LAND: This publication. NORDENSKIÖLD LAND: This publication. NY-FRIESLAND: This publication. PRINS KARLS FORLAND: Konstantinova & Savchenko 2020a. SØRKAPP LAND: This publication. WEDEL JARLSBERG LAND: This publication.

** — var. heterocolpos [ Lophozia heterocolpos var. heterocolpos , Leiocolea heterocolpos var. heterocolpos ]. SVALBARD: Schuster 1969, Düll 1983, Damsholt 2002, Söderström et al. 2002 a, Hodgetts 2015, Hodgetts & Lockhart 2020. BARENTSØYA: Konstantinova & Savchenko 2018. OSCAR II LAND: Arnell & Mårtensson 1959.

*** Mesoptychia rutheana (Limpr.) L.Söderstr. et Váňa View in CoL [ Lophozia rutheana (Limpr.) M.Howe , Leiocolea rutheana (Limpr.) Müll.Frib. View in CoL ]. SVALBARD: Düll 1983, Söderström 1995, Paton 1999, Damsholt 2002, Söderström et al. 2002a, 2002b, Söderström et al. 2002b, Damsholt 2013, Hodgetts 2015, Hodgetts & Lockhart 2020. DICKSON LAND: Frisvoll 1978, Frisvoll & Blom 1992, 1997, Frisvoll & Elvebakk 1996. NORDENSKIÖLD LAND: Frisvoll & Blom 1992, 1997, Frisvoll & Elvebakk 1996.

*** Mesoptychia sahlbergii (Lindb. et Arnell) A.Evans. View in CoL SVALBARD: Düll 1983, Schuster 1983, Söderström 1995, Schuster & Konstantinova 1996, Grolle & Long 2000, Konstantinova 2000, Damsholt 2002, Söderström et al. 2002a, Damsholt 2013, Hodgetts 2015, Hodgetts & Lockhart 2020, Konstantinova & Savchenko 2020b. DICKSON LAND: Frisvoll 1981, Frisvoll & Blom 1992, 1997, Frisvoll & Elvebakk 1996. NORDENSKIÖLD LAND: This publication. SABINE LAND: Frisvoll & Blom 1992, Frisvoll & Elvebakk 1996.

Metzgeria Raddi View in CoL

*** Metzgeria furcata View in CoL (L.) Corda. SVALBARD: Hodgetts 2015, Hodgetts & Lockhart 2020. OSCAR II LAND: Borovichev 2010. Mylia Gray View in CoL

*** Mylia taylorii (Hook.) Gray View in CoL [ Jungermannia taylorii Hook. ]. SVALBARD: Düll 1983 [with a ‘?’], Söderström 1995, Paton 1999, Konstantinova 2000, Damsholt 2002, Söderström et al. 2002a, 2002 b, Konstantinova 2003, Damsholt 2013, Hodgetts 2015, Hodgetts & Lockhart 2020. SPITSBERGEN: Lindberg 1866 [Kingsbay], Arnell & Mårtensson 1959 [Kongsfjorden], Frisvoll & Blom 1992 [Kongsfjorden], Frisvoll & Elvebakk 1996 [Kongsfjorden], Frisvoll & Blom 1997 [Kongsfjorden]. OSCAR II LAND: Berggren 1875a.

Nardia Gray View in CoL

*** Nardia geoscyphus (De Not.) Lindb. View in CoL SVALBARD: Söderström 1995, Paton 1999, Damsholt 2002, Söderström et al. 2002a, 2002 b, Konstantinova 2003, Damsholt 2013, Hodgetts 2015, Hodgetts & Lockhart 2020. PRINS OSCARS LAND: Konstantinova et al. 2014, Konstantinova & Savchenko 2015. HEER LAND: This publication. NORDENSKIÖLD LAND: Frisvoll & Elvebakk 1996, Frisvoll & Blom 1997, Konstantinova & Savchenko 2007, 2008 a, 2008b. OSCAR II LAND: Brattbakk et al. 1978, Frisvoll & Elvebakk 1996, Frisvoll & Blom 1997. WEDEL JARLSBERG LAND: Rejment-Grochowska 1967, Eurola 1968, Frisvoll & Elvebakk 1996, Frisvoll & Blom 1997.

Neoorthocaulis L.Söderstr., De Roo et Hedd. View in CoL

** Neoorthocaulis hyperboreus (R.M.Schust.) L.Söderstr., De Roo et Hedd. View in CoL SVALBARD: Hodgetts & Lockhart 2020, Konstantinova & Savchenko 2020b. ALBERT I LAND: This publication. DICKSON LAND: This publication. NATHORST LAND: This publication. NORDENSKIÖLD LAND: Ellis et al. 2016b as Barbilophozia floerkei , This publication. OSCAR II LAND: Gugnacka-Fiedor & Nryśkiewicz 1982 as Orthocaulis floerkei, Boińska & Gugnacka-Fiedor 1983 as Barbilophozia floerkei . PRINS KARLS FORLAND: This publication. SØRKAPP LAND: This publication. WEDEL JARLSBERG LAND: This publication. NOTE: A critical taxon and the whole Neoorthocaulis-Orthocaulis-Schljakovianthus complex is in need of a molecular revision. We here report Neoorthocaulis hyperboreus View in CoL as described by Damsholt (2013). Specimens report- ed as Barbilophozia floerkei or Orthocaulis floerkei in Ellis et al. (2016b), Gugnacka-Fiedor & Nryśkiewicz (1982) and Boińska & Gugnacka-Fiedor (1983) have been seen by N.A. Konstantinova and correspond to our concept of Neoorthocaulis hyperboreus View in CoL , not to Neoorthocaulis floerkei View in CoL .

Odontoschisma (Dumort.) Dumort. View in CoL

*** Odontoschisma elongatum (Lindb.) A.Evans. View in CoL SVALBARD: Schuster & Damsholt 1974, Vilnet et al. 2012 a, Hodgetts 2015, Ellis et al. 2016 a, Feldberg et al. 2016, Hodgetts & Lockhart 2020. PRINS OSCARS LAND: This publication. NORDENSKIÖLD LAND: Hadač 1989, Konstantinova & Savchenko 2007, 2008 a, 2008b, Konstantinova et al. 2020b. NOTE: Odontoschisma elongatum View in CoL was rejected from Svalbard by Frisvoll & Elvebakk (1996) but it has later been shown to occur there.

*** Odontoschisma francisci (Hook.) L.Söderstr. et Váňa View in CoL [ Cladopodiella francisci (Hook.) Jørg. ]. SVALBARD: Schuster 1974, Düll 1983, Smith 1990, Söderström 1995, Paton 1999, Konstantinova 2000, Damsholt 2002, Söderström et al. 2002a, 2002 b, Konstantinova 2003, Damsholt 2013, Hodgetts 2015, Hodgetts & Lockhart 2020. OSCAR II LAND: Arnell & Mårtensson 1959, Frisvoll & Blom 1992, 1997, Frisvoll & Elvebakk 1996.

*** Odontoschisma macounii (Austin) Underw. View in CoL SVALBARD: Evans 1903, Bryhn 1906, Arnell & Jensen 1907, Arnell 1928, Frye & Clark 1945, Buch & Tuomikoski 1955, Arnell 1956, Müller 1956c, Schuster et al. 1959, Schuster 1974, Bonner 1976 as Jungermannia tessellata, Düll 1983 , Smith 1990, Söderström 1995, Frisvoll & Elvebakk 1996, Paton 1999, Damsholt 2002, Söderström et al. 2002a, 2002b, Vilnet et al. 2012a, Damsholt 2013, Bakalin & Vilnet 2014, Hodgetts 2015, Ellis et al. 2016 a, Feldberg et al. 2016, Hodgetts & Lockhart 2020. GUSTAV V LAND: This publication. PRINS OSCARS LAND: This publication. BARENTSØYA: Philippi 1973, Konstantinova & Savchenko 2018. EDGEØYA: Philippi 1973. Berggren 1875b as Jungermannia tessellata, Arnell & Mårtensson 1959 [W. Spitsbergen], Gradstein & Ilkiu-Borges 2015 [Kings Bay]. DICKSON LAND: Konstantinova & Savchenko 2008c. HAAKON VII LAND: Polunin 1945, Frisvoll 1978, Konstantinova & Savchenko 2006, 2008a. NORDENSKIÖLD LAND: Eurola 1968, Virtanen et al. 2013. OSCAR II LAND: TYPE of Sphagnoecetis communis var. tessellata, Berggren 1875a as Sphagnoecetis communis var. tessellata, Müller 1913b , Brattbakk et al. 1978, Kobayashi et al. 1990. PRINS KARLS FORLAND: Konstantinova & Savchenko 2020a. WEDEL JARLSBERG LAND: This publication.

Oleolophozia L.Söderstr., De Roo et Hedd. View in CoL

*** Oleolophozia perssonii (H.Buch et S.W.Arnell) L.Söderstr., De Roo et Hedd. View in CoL [ Lophozia perssonii H.Buch et S.W.Arnell ]. SVALBARD: Schuster 1969, Schljakov 1980, Düll 1983, Arts 1986, Damsholt 1993, Söderström 1995, Paton 1999, Konstantinova 2000, Damsholt 2002, Söderström et