Abstract
The upper Han River plays an important role in the Middle Route of the North to South Water Transfer Project in China. During an investigation of diatom biodiversity in this area, a new benthic monoraphid diatom, Achnanthidium ampliatum sp. nov. was observed from an alkaline tributary. This new species has relatively large valves, with a lanceolate axial area and distal raphe ends curved to the same side on the raphe valve, linear axial area in rapheless valves, with uniseriate striae and round to short slit-like areolae on both valves. We present light and scanning electron microscopic observations to document the new species. A. ampliatum sp. nov. is easily separated from other, similar Achnanthidium and Psammothidum taxa, and we provide comparisons with species that have similar outlines and valve features.
References
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Qi, Y.Z. & Xie, S.Q. (1984) The diatom in moss swamp from Hubei Shennongjia. Jinan Yili Xuebao 1984 (3): 86–92.
Skvortzow, B.V. (1929) Alpine Diatoms from Fukien Province, South China. Philippine Journal of Science 41 (1): 39–49.
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Tan, X., Liu, Y., Burford, M.A. & Zhang, Q.F. (2020) The performance of diatom indices in assessing temporal changes in water quality in a large lowland river ecosystem. River Research Application 37 (3): 423–432. https://doi.org/10.1002/rra.3754
Wynne, M.J. (2019) Delicatophycus gen. nov.: a validation of “Delicata Krammer” inval. (Gomphonemataceae, Bacillariophyta). Notulae algarum 97: 1–3.
You, Q.M., Zhao, K., Wang, Y.L., Yu, P., Kociolek, J.P., Pang, W.T. & Wang, Q.X. (2021) Four new species of monoraphid diatoms from Western Sichuan Plateau in China. Phytotaxa 479 (3): 257–274. https://doi.org/10.11646/phytotaxa.479.3.3
You, Q.M., Cao, Y., Yu, P., Kociolek, J.P., Zhang, L.X., Wu, B., Lowe, R. & Wang, Q.X. (2019) Three new subaerial Achnanthidium (Bacillariophyta) species from a karst landform in the Guizhou Province, China. Fottea 19 (2): 138–150. https://doi.org/10.5507/fot.2019.005
Yu, P., You, Q.M., Kociolek, J.P. & Wang Q.X. (2019a) Three new freshwater species of the genus Achnanthidium (Bacillariophyta, Achnanthidiaceae) from Taiping Lake, China. Fottea, Olomouc 19 (1):33–49. https://doi.org/10.5507/fot.2018.015
Yu, P., You, Q-M., Pang, W-T., Cao, Y. & Wang, Q-X. (2019b) Five new Achnanthidiaceae species (Bacillariophyta) from Jiuzhai Valley, Sichuan Province, Southwestern China. Phytotaxa 405 (3): 147–170. https://doi.org/10.11646/phytotaxa.405.3.5
Zhu, H.Z. & Chen, J.Y. (1994) Study on the diatoms of the Wuling Mountain Region. Compilation of reports on the survey of algal resources, 405 pp.
Zhu, H.Z. & Chen, J.Y. (1996) New taxa of diatom (Bacillariophyta) from Xizang (Tibet). (II). Zhiwu Fenlei Xuebao 34 (1): 102–104.
Bory de Saint-Vincent, J.B.G.M. (1822) Achnanthe. Achnanthes. Dictionnaire Classique d’Histoire Naturelle 1: 79–80.
Bukhtiyarova, L. & Round, F.E. (1996) Revision of the genus Achnanthes senu lato. Psammothidium, a new genus based on A. marginulatum. Diatom Research 11: 1–30. http://dx.doi.org/ 10.1080/0269249X.1996.9705361
Ehrenberg, C.G. (1832) Über die Entwicklung und Lebensdauer der Infusionsthiere; nebst ferneren Beiträgen zu einer Vergleichung ihrer organischen Systeme. Abhandlungen der Königlichen Akademie der Wissenschaften zu Berlin 1831: 1–154.
Hustedt, F. (1922) Bacillariales aus Innerasien. Gesammelt von Dr. Sven Hedin. Southern Tibet, discoveries in former times compared with my own researches in 1906–1908. Lithographic Institute of the General Staff of the Swedish Army, Stockholm 6(3): 107–152. https://doi.org/10.5962/bhl.title.64226
Jao, C. (1964) Some fresh-water algae from southern Tibet. Oceanologia et Limnologia Sinica 6 (2): 169–192.
Jao, C., Zhu, H. & Lee, Y. (1974) The fresh-water algae from Mount Qomolangma district (in Tibet). Report of the Scientific Survey of Mount Qomolangma district 1966–1968: 92–126.
Kociolek, J.P., You, Q.M., Liu, Q., Liu, Y. & Wang, Q.X. (2020) Continental diatom biodiversity discovery and description in China: 1848 through 2019. PhytoKeys 160: 45–97. https://doi.org/10.3897/phytokeys.160.54193
Krammer, K. & Lange-Bertalot, H. (2004) Bacillariophyceae 4. Teil: Achnanthaceae, Kritische Erganzungen zu Navicula (Lineolatae), Gomphonema Gesamtliteraturverzeichnis [second revised edition] In: Suesswasserflora von Mitteleuropa. Spektrum Akademischer Verlad Heidelberg, 2, 4, 468 pp.
Kulikovskiy, M., Maltsev, Y., Glushchenko, A., Kuznetsova, I., Kapustin, D., Gusev, E., Lange-Bertalot, H., Genkal, S. & Kociolek, J.P. (2020) Gogorevia, A new monoraphid diatom genus for Achnanthes exigua and allied taxa (Achnanthidiaceae) described on the basis of an integrated molecular and morphological approach. Journal of Phycology 56 (6): 1601–1613. https://doi.org/10.1111/jpy.13064
Kützing, F.T. (1844) Die Kieselschaligen. Bacillarien oder Diatomeen. Nordhausen., 152 pp.
Li, S. & Zhang, Q. (2008) Geochemistry of the upper Han River basin, China, 1: Spatial distribution of major ion compositions and their controlling factors. Applied Geochemistry 23: 3535–3544.
Li, S., Gu, S., Liu, W., Han, H. & Zhang, Q. (2008) Water quality in relation to land use and land cover in the upper Han River basin, China. Catena 75: 216–222. https://doi.org/10.1016/j.catena.2008.06.005
Liu, B., Blanco, S., Long, H., Xu, J.J. & Jiang, X.Y. (2016) Achnanthidium sinense sp. nov. (Bacillariophyta) from the Wuling Mountains Area, China. Phytotaxa 284 (3): 194–202. https://doi.org/10.11646/phytotaxa.284.3.4
Liu, Y., Kociolek, J.P., Wang, Q-X., Tan, X. & Fan, Y.W. (2014) Two new species of monoraphid diatom (Bacillariophyceae) from South of China. Phytotaxa 188 (1): 31–37. https://doi.org/10.11646/phytotaxa.188.1.4
Liu, Y., Kociolek, J.P., Liu, Q., Tan, X. & Fan, Y.W. (2020) A new aerophilic Neidium Pfister (Neidiaceae, Bacillariophyta) species from Guangxi Zhuang Autonomous Region, China. Phytotaxa 432 (2): 171–180. https://doi.org/10.11646/phytotaxa.432.2.6
Monnier, O., Lange-Bertalot, H., Hoffmann, L. & Ector, L. (2007) The genera Achnanthidium Kützing and Psammothidium Bukhtiyarova & Round in the family Achnanthidiaceae (Bacillariophyceae): a reappraisal of the differential criteria. Cryptogamie, Algologie 28 (2): 141–158.
Potapova, M. (2006) Achnanthidium zhakovschikovii sp. nov. (Bacillariophyta) and related species from rivers of Northwestern Russia. Nova Hedwigia 82 (3–4): 399–408
Potapova, M.G. & Ponader, K.C. (2004) Two common North Amercian diatoms Achnanthidium rivulare sp. nov. and A. deflexum (Reimer) Kingston: morphology, ecology and comparison with related species. Diatom Research 19 (1): 33–57.
Qi, Y.Z. & Xie, S.Q. (1984) The diatom in moss swamp from Hubei Shennongjia. Jinan Yili Xuebao 1984 (3): 86–92.
Skvortzow, B.V. (1929) Alpine Diatoms from Fukien Province, South China. Philippine Journal of Science 41 (1): 39–49.
Skvortzow, B.W. (1935) Diatoms from Poyang Lake, Hunan, China. Philippine Journal of Science 57 (4): 465–477.
Skvortzow, B.V. (1938) Diatoms from Chengtu, Szechwan, Western China. Philippine Journal of Science 66 (4): 479–496.
Spaulding, S. & Edlund, M. (2008) Psammothidium. In Diatoms of North America. Available from: https://diatoms.org/genera/psammothidium (accessed 2 February 2021)
Tan, X., Sheldon, F., Bunn, S.E. & Zhang, Q. (2013) Using diatom indices for water quality assessment in a subtropical river, China. Environmental Science and Pollution Research 20: 4164–4175.
Tan, X., Ma, P., Xia, X. & Zhang, Q. (2014a) Spatial pattern of benthic diatoms and water quality assessment using diatom indices in a subtropical river, China. Clean-Soil, Air, Water 42: 20–28.
Tan, X., Xia, X., Zhao, Q. & Zhang, Q. (2014b) Temporal variations of benthic diatom community and its main influencing factors in a subtropical river, China. Environmental Science and Pollution Research 21: 434–444.
Tan, X., Zhang, Q., Burford, M.A., Sheldon, F. & Bunn, S.E. (2017) Benthic diatom based indices for water quality assessment in two subtropical streams. Frontiers in Microbiology 8: 601. https://doi.org/10.3389/fmicb.2017.00601
Tan, X., Liu, Y., Burford, M.A. & Zhang, Q.F. (2020) The performance of diatom indices in assessing temporal changes in water quality in a large lowland river ecosystem. River Research Application 37 (3): 423–432. https://doi.org/10.1002/rra.3754
Wynne, M.J. (2019) Delicatophycus gen. nov.: a validation of “Delicata Krammer” inval. (Gomphonemataceae, Bacillariophyta). Notulae algarum 97: 1–3.
You, Q.M., Zhao, K., Wang, Y.L., Yu, P., Kociolek, J.P., Pang, W.T. & Wang, Q.X. (2021) Four new species of monoraphid diatoms from Western Sichuan Plateau in China. Phytotaxa 479 (3): 257–274. https://doi.org/10.11646/phytotaxa.479.3.3
You, Q.M., Cao, Y., Yu, P., Kociolek, J.P., Zhang, L.X., Wu, B., Lowe, R. & Wang, Q.X. (2019) Three new subaerial Achnanthidium (Bacillariophyta) species from a karst landform in the Guizhou Province, China. Fottea 19 (2): 138–150. https://doi.org/10.5507/fot.2019.005
Yu, P., You, Q.M., Kociolek, J.P. & Wang Q.X. (2019a) Three new freshwater species of the genus Achnanthidium (Bacillariophyta, Achnanthidiaceae) from Taiping Lake, China. Fottea, Olomouc 19 (1):33–49. https://doi.org/10.5507/fot.2018.015
Yu, P., You, Q-M., Pang, W-T., Cao, Y. & Wang, Q-X. (2019b) Five new Achnanthidiaceae species (Bacillariophyta) from Jiuzhai Valley, Sichuan Province, Southwestern China. Phytotaxa 405 (3): 147–170. https://doi.org/10.11646/phytotaxa.405.3.5
Zhu, H.Z. & Chen, J.Y. (1994) Study on the diatoms of the Wuling Mountain Region. Compilation of reports on the survey of algal resources, 405 pp.
Zhu, H.Z. & Chen, J.Y. (1996) New taxa of diatom (Bacillariophyta) from Xizang (Tibet). (II). Zhiwu Fenlei Xuebao 34 (1): 102–104.