Silva Center for Phycological Documentation: Index Nominum Algarum

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Indexes (very large files) to all taxa:

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Pleurosigma obtusatum W.S. Sullivant in W.S. Sullivant & T.G. Wormley
Amer. J. Sci. & Arts, ser. 2, 27: 251, footnote. 1859. (L)
Type: ANSP slide W-6-20, Boyer (LT fide Sterrenburg, Proc. Acad. Nat. Sci. Philadelphia 145: 221. 1994)
Type locality: USA: Ohio: Columbus
Collector: T.G. Wormley (in 1857)

See image Gyrosigma obtusatum (W.S. Sullivant) Boyer 1922
[also Gambier, Ohio: H.L. Smith; Genessee River, N.Y.: C.A. Spencer]

Retrieve all Pleurosigma
Get original family assignment from Index Nominum Genericorum
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