Abstract
Stomatocyst 131 Pang & Wang was described from the sedge mires and puddles in the Aershan Geological Park, China and it has not been reported from other localities since its description. We recorded stomatocyst 131 from a shallow lake Zhurmankol in South Urals, Russia. Morphological variability of this morphotype was studied using scanning electron microscopy. We showed that the width of hexagonal pattern as well as the height of the mesh edges significantly varied depending on the maturation stage of the stomatocyst. An amended diagnosis of this stomatocyst is provided.
References
<p>Bai, X., Bu, Z.J. & Chen, X. (2018) Morphology of Chrysophycean stomatocysts in three peatlands in central China. <em>Mires and Peat</em> 21: 1–16. http://dx.doi.org/10.19189/MaP.2018.OMB.350</p>
<p>Bazhenova, O.P. (2021) <em>Atlas of stomatocysts of golden algae from the plankton of the Omsk Priirtyshye waterbodies</em>. Omsk, 122 pp. [In Russian]</p>
<p>Brown, K.M., Zeeb, B.A., Smol, J.P. & Pienitz, R. (1997) Taxonomic and ecological characterization of chrysophyte stomatocysts from northwestern Canada. <em>Canadian Journal of Botany</em> 75: 842–863. https://doi.org/10.1139/b97-094</p>
<p>Cabała, J. & Piątek, M. (2004) Chrysophycean stomatocysts from the Staw Toporowy Nizni lake (Tatra National Park, Poland). <em>Annales de Limnologie - International Journal of Limnology</em> 40 (2): 149–165. https://doi.org/10.1051/limn/2004013</p>
<p>Cronberg, G. (1980) Cyst development in different species of <em>Mallomonas</em> (Chrysophyceae) studied by scanning electron microscopy. <em>Archiv für Hydrobiologie</em> Suppl. 56: 421–434.</p>
<p>Cronberg, G. (1988) Variability in size and ultrastructure of the statospore of <em>Mallomonas caudata. Hydrobiologia </em>161: 31–39. https://doi.org/10.1007/BF00044097</p>
<p>Cronberg, G. (1992) <em>Uroglena dendracantha </em>n. sp. (Chrysophyceae) from Central Småland, Sweden. <em>Nordic Journal of Botany</em> 12: 507–512. http://dx.doi.org/10.1111/j.1756-1051.1992.tb01829.x</p>
<p>Duff, K.E., Douglas, M.S.V. & Smol, J.P. (1992) Chrysophyte cysts in 36 Canadian high arctic ponds. <em>Nordic Journal Botany</em> 12: 471–499. https://doi.org/10.1111/j.1756-1051.1992.tb01331.x</p>
<p>Duff, K.E., Zeeb, B.A. & Smol, J.P. (1995) <em>Atlas of Chrysophycean Cysts</em>. Kluwer Academic Publishers, Dordrecht, 189 pp. https://doi.org/10.1007/978-94-017-0809-8</p>
<p>Firsova, A.D., Bessudova, A.Yu. & Likhoshway, E.V. (2018) Chrysophycean stomatosysts in tributaries of northern limit of Lake Baikal. <em>Acta Biologica Sibirica</em> 4 (4): 25–44. [In Russian] https://doi.org/10.14258/abs.v3i4.3637</p>
<p>Gilbert, S., Zeeb, B.A. & Smol, J.P. (1997) Chrysophyte stomatocyst flora from a forest peat core in the Lena River Region, northeastern Siberia. <em>Nova Hedwigia, Beiheft</em> 64: 311–352. https://doi.org/10.1127/nova.hedwigia/64/1997/311</p>
<p>Holen, D.A. (2014) Chrysophyte stomatocyst production in laboratory culture and descriptions of seven cyst morphotypes. <em>Phycologia</em> 53: 426–432. https://doi.org/10.2216/14-001.1</p>
<p>Ignatenko, M.E., Yatsenko-Stepanova, T.N. & Urzhumov, A.A. (2021) New records of <em>Mallomonas</em> species (Chrysophyceae, Synurales) for the Orenburg Region (South Urals, Russia). <em>Novosti sistematiki nizshikh rastenii</em> 55 (2): 315–323. [In Russian] https://doi.org/10.31111/nsnr/2021.55.2.315</p>
<p>Kapustin, D.A. (2014) Freshwater algae of the Polessian Nature Reserve (Ukraine). <em>International Journal on Algae</em> 16: 43–56. https://doi.org/10.1615/interjalgae.v16.i1.30</p>
<p>Kapustin, D.A. (2018) On morphology of the stomatocyst 53 Duff et Smol, 1991 (Chrysophyceae) from a mire pool on Bali Island (Indonesia). <em>Novosti Sistematiki Nizshikh Rasteniy</em> 52 (1): 75–81. https://doi.org/10.31111/nsnr/2018.52.1.75</p>
<p>Kapustin, D.A. & Kapustina, N.V. (2018) New records of <em>Chrysococcus furcatus</em> (Chrysophyceae) in Russia. <em>Inland Water Biology</em> 11: 384–386. https://doi.org/10.1134/S1995082918040090</p>
<p>Kapustin, D.A., Philippov, D.A. & Gusev, E.S. (2016) Four new chrysophycean stomatocysts with true complex collar from the Shichengskoe raised bog in Central Russia. <em>Phytotaxa </em>288: 285–290. https://doi.org/10.11646/phytotaxa.288.3.10</p>
<p>Kapustin, D., Sterlyagova, I. & Patova, E. (2019) Morphology of <em>Chrysastrella paradoxa</em> stomatocysts from the Subpolar Urals (Russia) with comments on related morphotypes. <em>Phytotaxa </em>402 (6): 295–300. https://doi.org/10.11646/phytotaxa.402.6.4</p>
<p>Pang, W., Wang, Y. & Wang, Q. (2012) Ten new chrysophycean stomatocysts ornamented with spines from bogs near Da’erbin Lake, China. <em>Nova Hedwigia,</em> <em>Beiheft</em> 94 (1–2): 193–207. https://doi.org/10.1127/0029-5035/2012/0094-0193</p>
<p>Pang, W. & Wang, Q. (2014) Chrysophycean stomatocysts from the Aershan Geological Park (Inner Mongolia), China. <em>Phytotaxa</em> 187 (1): 1–92. https://doi.org/10.11646/phytotaxa.187.1.1</p>
<p>Pang, W. & Wang, Q. (2016) Chrysophycean stomatocysts from Xinjiang Province, China. <em>Phytotaxa </em>288 (1): 41–50. https://doi.org/10.11646/phytotaxa.288.1.4</p>
<p>Pang, W. & Wang, Q. (2017) <em>Chrysophycean stomatocysts from the Da Hinggan Mountains</em>. Science Press, Beijing, 253 pp.</p>
<p>Pang, W. & Van de Vijver, B. (2021) Freshwater chrysophycean stomatocysts from Monte Lauro (Buccheri, Sicily, Italy). <em>Phytotaxa</em> 494 (2): 177–192. https://doi.org/10.11646/phytotaxa.494.2.1</p>
<p>Piątek, J. & Piątek, M. (2008) Chrysophyte stomatocysts from gypsum damp vegetation in Southern Poland. <em>Polish Botanical Journal</em> 53 (1): 57–67.</p>
<p>Piątek, J. & Piątek, M. (2014) Morphological variability of new chrysophyte stomatocyst forming a single-cyst assemblage in a low-conductivity tropical lake in the Guineo-Congolian rainforest. <em>Phytotaxa</em> 174 (5): 261–271. https://doi.org/10.11646/phytotaxa.174.5.2</p>
<p>Pla, S. (2001) <em>Chrysophycean cysts from Pyrenees</em>. Berlin, 237 pp.</p>
<p>Sandgren, C.D. (1989) SEM investigations of statospore (stomatocyst) development in diverse members of the Chrysophyceae and Synurophyceae. <em>Beiheft zur Nova Hedwigia</em> 95: 45–69.</p>
<p>Shadrina, S.N. (2019) Diversity of chrysophycean (Chrysophyta) stomatocysts in the Gulf of Finland, Baltic sea. <em>Botanicheskii zhurnal </em>104 (5): 684–698. [In Russian] https://doi.org/10.1134/S0006813619050120</p>
<p>Siver, P.A. (1991) The stomatocyst of <em>Mallomonas acaroides v. muskokana</em> (Chrysophyceae). <em>Journal of Paleolimnology</em> 5: 11–17. http://dx.doi.org/10.1007/BF00226556</p>
<p>Skogstad, A. (1984) Vegetative cells and cysts of <em>Mallomonas intermedia </em>(Mallomonadaceae, Chrysophyceae). <em>Nordic Journal of Botany </em>4: 275–278. https://doi.org/10.1111/j.1756-1051.1984.tb01498.x</p>
<p>Skogstad, A. & Reymond, O.L. (1989) An ultrastructural study of vegetative cells, encystment, and mature statopores in <em>Spiniferomonas bourrellyi</em> (Chrysophyceae). <em>Nova Hedwigia,</em> <em>Beiheft</em> 95: 71–79.</p>
<p>Smol, J.P. (1984) The statospore of <em>Mallomonas pseudocoronata</em> (Mallomonadaceae, Chrysophyceae). <em>Nordic Journal of Botany </em>4: 827–831. https://doi.org/10.1111/j.1756-1051.1984.tb02014.x</p>
<p>Soróczki-Pintér, E., Pla-Rabes, S., Magyari, E.K., Stenger-Kovács, C. & Buczkó, K. (2014) Late quaternary chrysophycean stomatocysts in a Southern Carpathian mountain lake, including the description of new forms (Romania). <em>Phytotaxa</em> 170 (3): 169–186. http://dx.doi.org/10.11646/phytotaxa.170.3.3</p>
<p>Van de Vijver, B. & Beyens, L. (1997) The Chrysophyte stomatocyst flora of the moss vegetation from Strømness Bay Area, South Georgia. <em>Archiv für Protistenkunde</em> 148: 505–520. https://doi.org/10.1016/S0003-9365(97)80026-7</p>
<p>Wołowski, K., Piątek, J. & Płachno, B.J. (2011) Algae and stomatocysts associated with carnivorous plants. First report of chrysophyte stomatocysts from Virginia, USA. <em>Phycologia</em> 50 (5): 511–519. https://doi.org/10.2216/10-94.1</p>
<p>Zeeb, B.A. & Smol, J.P. (1993) Chrysophycean stomatocyst flora from Elk Lake, Clearwater County, Minnesota. <em>Canadian Journal of Botany</em> 71: 737–756. https://doi.org/10.1139/b93-086</p>
<p>Bazhenova, O.P. (2021) <em>Atlas of stomatocysts of golden algae from the plankton of the Omsk Priirtyshye waterbodies</em>. Omsk, 122 pp. [In Russian]</p>
<p>Brown, K.M., Zeeb, B.A., Smol, J.P. & Pienitz, R. (1997) Taxonomic and ecological characterization of chrysophyte stomatocysts from northwestern Canada. <em>Canadian Journal of Botany</em> 75: 842–863. https://doi.org/10.1139/b97-094</p>
<p>Cabała, J. & Piątek, M. (2004) Chrysophycean stomatocysts from the Staw Toporowy Nizni lake (Tatra National Park, Poland). <em>Annales de Limnologie - International Journal of Limnology</em> 40 (2): 149–165. https://doi.org/10.1051/limn/2004013</p>
<p>Cronberg, G. (1980) Cyst development in different species of <em>Mallomonas</em> (Chrysophyceae) studied by scanning electron microscopy. <em>Archiv für Hydrobiologie</em> Suppl. 56: 421–434.</p>
<p>Cronberg, G. (1988) Variability in size and ultrastructure of the statospore of <em>Mallomonas caudata. Hydrobiologia </em>161: 31–39. https://doi.org/10.1007/BF00044097</p>
<p>Cronberg, G. (1992) <em>Uroglena dendracantha </em>n. sp. (Chrysophyceae) from Central Småland, Sweden. <em>Nordic Journal of Botany</em> 12: 507–512. http://dx.doi.org/10.1111/j.1756-1051.1992.tb01829.x</p>
<p>Duff, K.E., Douglas, M.S.V. & Smol, J.P. (1992) Chrysophyte cysts in 36 Canadian high arctic ponds. <em>Nordic Journal Botany</em> 12: 471–499. https://doi.org/10.1111/j.1756-1051.1992.tb01331.x</p>
<p>Duff, K.E., Zeeb, B.A. & Smol, J.P. (1995) <em>Atlas of Chrysophycean Cysts</em>. Kluwer Academic Publishers, Dordrecht, 189 pp. https://doi.org/10.1007/978-94-017-0809-8</p>
<p>Firsova, A.D., Bessudova, A.Yu. & Likhoshway, E.V. (2018) Chrysophycean stomatosysts in tributaries of northern limit of Lake Baikal. <em>Acta Biologica Sibirica</em> 4 (4): 25–44. [In Russian] https://doi.org/10.14258/abs.v3i4.3637</p>
<p>Gilbert, S., Zeeb, B.A. & Smol, J.P. (1997) Chrysophyte stomatocyst flora from a forest peat core in the Lena River Region, northeastern Siberia. <em>Nova Hedwigia, Beiheft</em> 64: 311–352. https://doi.org/10.1127/nova.hedwigia/64/1997/311</p>
<p>Holen, D.A. (2014) Chrysophyte stomatocyst production in laboratory culture and descriptions of seven cyst morphotypes. <em>Phycologia</em> 53: 426–432. https://doi.org/10.2216/14-001.1</p>
<p>Ignatenko, M.E., Yatsenko-Stepanova, T.N. & Urzhumov, A.A. (2021) New records of <em>Mallomonas</em> species (Chrysophyceae, Synurales) for the Orenburg Region (South Urals, Russia). <em>Novosti sistematiki nizshikh rastenii</em> 55 (2): 315–323. [In Russian] https://doi.org/10.31111/nsnr/2021.55.2.315</p>
<p>Kapustin, D.A. (2014) Freshwater algae of the Polessian Nature Reserve (Ukraine). <em>International Journal on Algae</em> 16: 43–56. https://doi.org/10.1615/interjalgae.v16.i1.30</p>
<p>Kapustin, D.A. (2018) On morphology of the stomatocyst 53 Duff et Smol, 1991 (Chrysophyceae) from a mire pool on Bali Island (Indonesia). <em>Novosti Sistematiki Nizshikh Rasteniy</em> 52 (1): 75–81. https://doi.org/10.31111/nsnr/2018.52.1.75</p>
<p>Kapustin, D.A. & Kapustina, N.V. (2018) New records of <em>Chrysococcus furcatus</em> (Chrysophyceae) in Russia. <em>Inland Water Biology</em> 11: 384–386. https://doi.org/10.1134/S1995082918040090</p>
<p>Kapustin, D.A., Philippov, D.A. & Gusev, E.S. (2016) Four new chrysophycean stomatocysts with true complex collar from the Shichengskoe raised bog in Central Russia. <em>Phytotaxa </em>288: 285–290. https://doi.org/10.11646/phytotaxa.288.3.10</p>
<p>Kapustin, D., Sterlyagova, I. & Patova, E. (2019) Morphology of <em>Chrysastrella paradoxa</em> stomatocysts from the Subpolar Urals (Russia) with comments on related morphotypes. <em>Phytotaxa </em>402 (6): 295–300. https://doi.org/10.11646/phytotaxa.402.6.4</p>
<p>Pang, W., Wang, Y. & Wang, Q. (2012) Ten new chrysophycean stomatocysts ornamented with spines from bogs near Da’erbin Lake, China. <em>Nova Hedwigia,</em> <em>Beiheft</em> 94 (1–2): 193–207. https://doi.org/10.1127/0029-5035/2012/0094-0193</p>
<p>Pang, W. & Wang, Q. (2014) Chrysophycean stomatocysts from the Aershan Geological Park (Inner Mongolia), China. <em>Phytotaxa</em> 187 (1): 1–92. https://doi.org/10.11646/phytotaxa.187.1.1</p>
<p>Pang, W. & Wang, Q. (2016) Chrysophycean stomatocysts from Xinjiang Province, China. <em>Phytotaxa </em>288 (1): 41–50. https://doi.org/10.11646/phytotaxa.288.1.4</p>
<p>Pang, W. & Wang, Q. (2017) <em>Chrysophycean stomatocysts from the Da Hinggan Mountains</em>. Science Press, Beijing, 253 pp.</p>
<p>Pang, W. & Van de Vijver, B. (2021) Freshwater chrysophycean stomatocysts from Monte Lauro (Buccheri, Sicily, Italy). <em>Phytotaxa</em> 494 (2): 177–192. https://doi.org/10.11646/phytotaxa.494.2.1</p>
<p>Piątek, J. & Piątek, M. (2008) Chrysophyte stomatocysts from gypsum damp vegetation in Southern Poland. <em>Polish Botanical Journal</em> 53 (1): 57–67.</p>
<p>Piątek, J. & Piątek, M. (2014) Morphological variability of new chrysophyte stomatocyst forming a single-cyst assemblage in a low-conductivity tropical lake in the Guineo-Congolian rainforest. <em>Phytotaxa</em> 174 (5): 261–271. https://doi.org/10.11646/phytotaxa.174.5.2</p>
<p>Pla, S. (2001) <em>Chrysophycean cysts from Pyrenees</em>. Berlin, 237 pp.</p>
<p>Sandgren, C.D. (1989) SEM investigations of statospore (stomatocyst) development in diverse members of the Chrysophyceae and Synurophyceae. <em>Beiheft zur Nova Hedwigia</em> 95: 45–69.</p>
<p>Shadrina, S.N. (2019) Diversity of chrysophycean (Chrysophyta) stomatocysts in the Gulf of Finland, Baltic sea. <em>Botanicheskii zhurnal </em>104 (5): 684–698. [In Russian] https://doi.org/10.1134/S0006813619050120</p>
<p>Siver, P.A. (1991) The stomatocyst of <em>Mallomonas acaroides v. muskokana</em> (Chrysophyceae). <em>Journal of Paleolimnology</em> 5: 11–17. http://dx.doi.org/10.1007/BF00226556</p>
<p>Skogstad, A. (1984) Vegetative cells and cysts of <em>Mallomonas intermedia </em>(Mallomonadaceae, Chrysophyceae). <em>Nordic Journal of Botany </em>4: 275–278. https://doi.org/10.1111/j.1756-1051.1984.tb01498.x</p>
<p>Skogstad, A. & Reymond, O.L. (1989) An ultrastructural study of vegetative cells, encystment, and mature statopores in <em>Spiniferomonas bourrellyi</em> (Chrysophyceae). <em>Nova Hedwigia,</em> <em>Beiheft</em> 95: 71–79.</p>
<p>Smol, J.P. (1984) The statospore of <em>Mallomonas pseudocoronata</em> (Mallomonadaceae, Chrysophyceae). <em>Nordic Journal of Botany </em>4: 827–831. https://doi.org/10.1111/j.1756-1051.1984.tb02014.x</p>
<p>Soróczki-Pintér, E., Pla-Rabes, S., Magyari, E.K., Stenger-Kovács, C. & Buczkó, K. (2014) Late quaternary chrysophycean stomatocysts in a Southern Carpathian mountain lake, including the description of new forms (Romania). <em>Phytotaxa</em> 170 (3): 169–186. http://dx.doi.org/10.11646/phytotaxa.170.3.3</p>
<p>Van de Vijver, B. & Beyens, L. (1997) The Chrysophyte stomatocyst flora of the moss vegetation from Strømness Bay Area, South Georgia. <em>Archiv für Protistenkunde</em> 148: 505–520. https://doi.org/10.1016/S0003-9365(97)80026-7</p>
<p>Wołowski, K., Piątek, J. & Płachno, B.J. (2011) Algae and stomatocysts associated with carnivorous plants. First report of chrysophyte stomatocysts from Virginia, USA. <em>Phycologia</em> 50 (5): 511–519. https://doi.org/10.2216/10-94.1</p>
<p>Zeeb, B.A. & Smol, J.P. (1993) Chrysophycean stomatocyst flora from Elk Lake, Clearwater County, Minnesota. <em>Canadian Journal of Botany</em> 71: 737–756. https://doi.org/10.1139/b93-086</p>