Achnanthidium pyrenaicum Kobayasi 1997

Lee, Sang Deuk, Yun, Suk Min, Cho, Pyo Yun, Yang, Hye-Won & Kim, Oe Jung, 2019, Newly Recorded Species of Diatoms in the Source of Han and Nakdong Rivers, South Korea, Phytotaxa 403 (3), pp. 143-170 : 152-157

Achnanthidium pyrenaicum Kobayasi 1997

Figures 12–15

Basionym: Achnanthes pyrenaica Hustedt 1939 .

Synonyms: Synedra biasolettiana Kützing 1844 ; Achnanthes biasolettiana Grunow 1880 ; Microneis biasolettiana (Kützing) Cleve 1895 ; Microneis biasolettiana (Kützing) Meister 1912 ; Achnanthes pyrenaica Hustedt 1939 ; Achnanthes minutissima var. pyrenaica (Hustedt) Cleve 1953 ; Achnanthidium biasolettianum (Grunow) Bukhtiyarova 1995 .

Original description: Kobayasi (1997), p. 148, figs 1–18.

Key literature: Cantonati et al. (2017).

Specimen examined: Tables 1, 2.

FIGURES 66–77. LM (66, 70) and SEM (67–69, 71–77) microphotographs. 66–69. Gomphonema truncatum . 70–74. Gyrosigma procerum . 75–77. Humidophila perpusilla . (Scale bars: 66, 67, 70 = 10 μm; 68, 69, 71, 73, 75, 76 = 2 μm; 72 = 20 μm; 74 = 1 μm; 77 = 0.5 μm).

FIGURES 78–89. LM (78, 81, 85) and SEM (79, 80, 82–84, 86–89) microphotographs. 78–80. Navicula gregaria . 81–83 Navicula nipponica . 84. Nitzschia dissipata . 85–89. Nitzschia linearis . (Scale bars: 78, 85, 86 = 10 μm; 79, 81, 82, 84, 87, 89 = 5 μm; 80, 83, 88 = 1 μm).

FIGURES 90–106. LM (90, 92, 96, 104) and SEM (91, 93–95, 97–103, 105, 106) microphotographs. 90, 91. Nitzschia fonticola . 92–95. Odontidium mesodon . 96–100. Odontidium hyemale . 101–103. Pinnularia pseudotabellaria . 104, 105. Pinnularia rabenhorstii . (Scale bars: 90, 92, 96, 98, 102–105 = 10 μm; 91, 95, 97, 99, 106 = 5 μm; 93, 94, 100 = 2 μm; 101 = 20 μm).

FIGURES 107–120. LM (107, 113, 117, 118) and SEM (108–112, 114–116, 119, 120) microphotographs. 107–109. Planothidium laceolatum . 110. Platessa barhlsii . 111, 112. Stauroneis reichardtii . 113–116. Thalassiosira lacustris . 117, 118. Ulnaria ulna . 119, 120. Ulnaria contracta . (Scale bars: 107, 108, 111, 115 = 5 μm; 109, 112, 120 = 2 μm; 110, 116 = 1 μm; 113, 114, 118, 119 = 10 μm; 117 = 20 μm).

Dimension: Length 14.5–18.8 μm, width 3.7–3.9 μm; 25–26 striae in 10 μm on the raphe valve, 21–22 striae in

10 μm on the rapheless valve, and 21–22 areolae in 10 μm on the valve mantle.

*Station numbers correspond to those in Table 1; **Newly recorded species in Korea; ■: occurrence; P: planktonic habitat; E: Epilithic habitat.