Diploneis nitescens (W. Gregory) Cleve

Park, Joon Sang, Lobban, Christopher S. & Lee, Kyun-Woo, 2018, Diatoms associated with seaweeds from Moen Island in Chuuk Lagoon, Micronesia, Phytotaxa 351 (2), pp. 101-140 : 116-117

57. Diploneis nitescens (W. Gregory) Cleve Fig. 78

References: Hustedt (1927 –1966), p. 640, fig. 1047; Stidolph et al. (2012), pl. 3, fig. 82, pl. 10, fig. 28, pl. 13, figs 82, 83, pl. 18, fig. 142, pl. 37, figs 13, 14, pl. 41, figs 64, 78–82, pl. 49, fig. 37, pl. 51, fig. 69; Park et al. (2017), p. 221, fig. 9.

Samples: Moen1_ Halimeda

Dimensions: 39.2 μm long, 16.5 μm wide; 12 striae in 10 μm.

Diagnostics: Oval cells with half-lanceolate longitudinal canals occupying up to half of the valve width; areolae on the valve surface often appearing to be in single rows, no pores evident on the longitudinal canals which are crossed by transverse ribs continuing the line of the striae.

Comments: Despite D. nitescens being frequently observed from tropical and subtropical regions ( Stidolph et al. 2012), it has not been previously reported in Micronesia. It differs from D. smithii in the relative width of the longitudinal canal, and lack of pores on them.

Figures

FIGURES 63–79. Fourteen diatom species of Diploneis. Fig. 63. D. chersonensis. Fig. 64. D. crabro. Figs 65 and 66. Diploneis sp. 1. Fig. 67. Diploneis sp. 2. Figs 68 and 69. D. weissflogii. Fig. 70. Diploneis sp. 3. Fig. 71. D. smithii. Fig. 72. Diploneis sp. 4. Fig. 73. D. littoralis. Figs 74 and 75. D. suborbicularis. Fig. 76. Diploneis sp. 5. Fig. 77. Diploneis sp. 6. Fig. 78. D. nitescens. Fig. 79. Diploneis sp. 7. Scale bar = 10 μm.