Fragilaria neointermedia Tuji & D.M.Williams, 2013

Delgado, Cristina, Novais, M. Helena, Blanco, Saúl & Almeida, Salomé F. P., 2015, Examination and comparison of Fragilaria candidagilae sp. nov. with type material of Fragilaria recapitellata, F. capucina, F. perminuta, F. intermedia and F. neointermedia (Fragilariales, Bacillariophyceae), Phytotaxa 231 (1), pp. 1-18 : 12-13

Fragilaria neointermedia Tuji & D.M.Williams (2013: 7, figs 28–42). ( Figs 132–149 )

Synonym: Fragilaria intermedia sensu Grunow in Van Heurck (1881: pl. 45, figs 9, 10, not fig. 11).

Type:— ENGLAND. Norfolk: Ormesby Boad. Holotype: W!, slide 31 mounted with styrax in Grunow’s collection (slide illustrated in Tuji & Williams 2013, fig. 28, last slide of bottom two marked ‘31’; figs 29–42; pl. 45, fig. 9 in Van Heurck, 1881). Isotype: W!, slide 31 air-mounted (slide illustrated in Tuji & Williams 2013, fig. 28, first slide of bottom two marked ‘31’) and raw material 31 in Grunow collection, TNS! AL-56395.

Morphology:— Lanceolate valves narrow towards rostrate ends. Rimoportulae occur near the poles, one per frustule on the valve face-mantle junction, and the apical pore fields are situated at each apex. The central area is slightly to one side of the valve, the sternum is narrow and the striation is parallel or slightly radiate. Spathulate linking spines are present in this species. Valve dimensions: Length 22.5–45.0 μm, width 3.4–4.2 μm, striae parallel or slightly radiate 11–14 in 10 μm in the type material analysed in this study and length 25–35 μm, width 3.5–4.5 μm, striae parallel or slightly radiate 8–10 in 10 μm in type material studied in Tuji & Williams (2013).

Habitat, distribution and ecology:— Unknown, until 2013 recorded as F. vaucheriae or F. intermedia .

Recent illustrated references:— Tuji & Williams (2013).

Notes:— Fragilaria neointermedia was described in 2013 by Tuji and Williams from Grunow’s Diatom Collection and the type slide is located at the Natural History Museum of Vienna. The conspecificity with F. vaucheriae can be discarded ( Tuji & Williams 2013). The type slide W-2011-0001893 from Grunow’s collection with the number 31 was analysed under the LM. The photographs included in this study were made from the type slides W-1901-0004076 and W-2011-0001893) from the Grunow Diatom Collection at the Natural History Museum of Vienna (W).

Figures

FIGURES 123–149. LM micrographs of the type materials. 123–131. Fragilaria intermedia (Grunow) Grunow from Tuji & Williams (2013); 132–149. Fragilaria neointermedia Tuji & Williams (2013) from type material Grunow (slide W-1901-0004076). Scale bar = 10 μm.