Climacosphenia elongata J.W. Bailey

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 : 105

5. Climacosphenia elongata J.W. Bailey Figs 5a, b

References: Round (1982), figs 4–6, 11, 12; Navarro & Lobban (2009), p. 136, figs 64, 65; Al-Handal et al. (2016), p. 13, pl. 6, figs 1, 2.

Samples: Moen1_ Halimeda

Dimensions: 516 μm long, 28.2 μm wide, 25 striae in 10 μm.

Diagnostics: Very long sturdy cells attached the short, stout mucilage stalks. Valvocopula with prominent ladder-like transverse septa.

Comments: Differs from the only other species of Climacosphenia , C. moniligera , in tapering abruptly one third to one half the way from the apex to a narrow “stem,” whereas C. moniligera has a continuous taper; the latter is often but not always curved.

Figures

FIGURES 2–8. Seven diatom species of Coscinodiscophyceae and Mediophyceae. Fig. 2. Roperia tesselata. Fig. 3. Triceratium dubium. Fig. 4. Thalassiosira cf. cedarkeyensis. Fig. 5. Ardissonea formosa. Fig. 6. Climacosphenia elongata. Fig. 7. Toxarium hennedeyanum, Fig. 8. T. undulatum. Scale bar = 10 μm.