Fallacia sp.

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 : 123

92. Fallacia sp. Fig. 112

References: Giffen (1975), p. 83; Navarro (1983a), p. 123, figs 82, 83; Al-Handal et al. (2016), p. 25, pl. 9, fig. 9.

Samples: Moen4_ Halimeda

Dimensions: 24.5 μm long, 10.0 μm wide; 27 striae in 10 μm.

Diagnostics: Valve elliptic with moderately rounded apices. Raphe filiform, proximal ends expanded. Lyre distinct.

Comments: Our specimen is close to F. forcipata sensu lato (s.l.). But the range of stria densities in F. forcipata s.l. is diverse: 13 in 10 μm ( Peragallo & Peragallo 1897 –1908); 15–19 ( Giffen 1975); 19–20 ( Navarro 1983a); 13–16(22) ( Witkowski et al. 2000); 24–26 (Al-Handal et al. 2016) – none as high as 27. For certain identification of this species, the SEM examination is essential.

Figures

FIGURES 102–113. Eleven diatom species of Naviculales. Fig. 102. Pinnunavis yarrenis. Figs 103 and 104. Trachyneis aspera. Fig. 105. Trachyneis velata. Fig. 106. Gyrosigma sp. Fig. 107. Caloneis liber var. linearis. Fig. 108. Caloneis sp. 1. Fig. 109. Caloneis sp. 2. Fig. 110. Caloneis sp. 3. Fig. 111. Chamaepinnularia clamans. Fig. 112. Fallacia sp. Fig. 113. Sellaphora sp. Scale bar = 10 μm.