163,964 species and infraspecific names are in the database, 22,784 images, 63,118 bibliographic items, 485,730 distributional records.

Species References

Navicula protracta Grunow

References
(Please note: only references with the binomials in the title are included. The information is from the Literature database.)

Mann, D.G. (1988). Sexual reproduction and systematics of navicula protracta. Diatom Research 3(2): 227-236.

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