Open Access Research article

The model marine diatom Thalassiosira pseudonana likely descended from a freshwater ancestor in the genus Cyclotella

Andrew J Alverson1*, Bánk Beszteri2, Matthew L Julius3 and Edward C Theriot4

Author Affiliations

1 Indiana University, Department of Biology, 1001 East Third Street, Bloomington, IN 47405, USA

2 Alfred Wegener Institute for Polar and Marine Research, Am Handelshafen 12, 27570 Bremerhaven, Germany

3 St. Cloud State University, Department of Biological Sciences, 720 Fourth Avenue South, St. Cloud, MN 56301, USA

4 The University of Texas at Austin, Texas Natural Science Center, 2400 Trinity Street, Austin, TX 78705, USA

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BMC Evolutionary Biology 2011, 11:125  doi:10.1186/1471-2148-11-125

Published: 14 May 2011

Additional files

Additional file 1:

Strict consensus of eight most parsimonious trees from a phylogenetic analysis of 32 morphological characters for select Thalassiosirales.

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Additional file 2:

Pairwise differences among Thalassiosira pseudonana culture strains at four loci.

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Additional file 3:

The nomenclatural history of Thalassiosira pseudonana.

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Additional file 4:

The identity of Thalassiosira pseudonana.

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Additional file 5:

Hustedt's observations on the type locality of Cyclotella nana (= T. pseudonana).

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Additional file 6:

Scanning electron micrographs of thalassiosiroid diatoms in the type material (Additional file 4) of Cyclotella nana (= Thalassiosira pseudonana): Stephanodiscus hantzschii Grunow (A, B), Stephanodiscus minutulus (Kützing) Cleve & Möller (C, D), Discostella pseudostelligera (Hustedt) Houk & Klee (E-H), Cyclotella striata (Kützing) Grunow in Cleve & Grunow (I), Cyclotella atomus Hustedt (J), Cyclotella meneghiniana Kützing (K,L), Cyclostephanos invisitatus (Hohn & Hellerman) Theriot, Stoermer & Håkansson (M), Shionodiscus sp. (N), Thalassiosira sp. 1 (O), Thalassiosira sp. 2 (P). Scale bar = 2 μM.

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Additional file 7:

Scanning electron micrographs showing exterior (A, B) and interior (C, D) views of Thalassiosira pseudonana (marine strain NEPC709) from Alverson et al. [25]. Scale bar = 2 μM.

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