Tursiocola staurolineata Denys, 1997

Frankovich, Thomas A., Sullivan, Michael J. & Stacy, Nicole I., 2015, Tursiocola denysii sp. nov. (Bacillariophyta) from the neck skin of Loggerhead sea turtles (Caretta caretta), Phytotaxa 234 (3), pp. 227-236 : 232

Tursiocola staurolineata Denys ( Figs 34–36 )

LM morphology: valves are isopolar to slightly heteropolar and linear to narrowly lanceolate, tapering gradually from the middle of the valves towards sub-acute apices ( Figs 34–36 ). Valve morphometrics are as follows: length 23–29 μm, width 2.6–2.8 μm, length to width ratio 8.3–10.5, n = 5. The raphe is straight and the central area is formed by a narrow stauros that extends to the valve margins ( Figs 34–36 ). The transapical striae are parallel in the middle of the valve, 30–32 in 10 μm but sometimes undiscernible, n = 4 ( Figs 34–36 ). By focusing through the valve, each pseudoseptum can be seen to extend over ca. 1/5 of the valve length from the apices ( Figs 34–36 ).

Type:— BELGIUM. Lombardsijde, specimens from the skin of a sperm whale, 51º 9’ N 2º 44’ E, November 1994 (isotype BRM! ZU 4/76).

Figures

FIGURES 31–36. Tursiocola olympica and T. staurolineata type populations, LM, specimens in valve view showing valve shape and size range. 31–33. Tursiocola olympica (holotype slide BRM! NA1/77). 34–36. Tursiocola staurolineata (isotype slide BRM! ZU4/76), Scale bar = 10 μm.