Rob, Many thanks. Waiting for a Forum response is a lot faster than waiting on a library during the Ontario lockdown! I'm familiar with Round (1990) though not as a paperback, but I skimmed over repro

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Peter, If you have a university library near you, its online catalog may have The Diatoms : biology & morphology of the genera by Round et al., 1990. As you might guess, it is often on the shelf, wait

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Mary-Ann and Rob, I am enjoying the Reproduction album but it does not entirely provide answers to two questions: Q1) what characters identify an initial cell and Q2) what characters identify its genu

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Mary Ann, I moved your Ditylum image to the album Reproduction and took the liberty of adding letters to it. (I set you as the owner of your images so you can edit them.) Are B and C stages of mitosis

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I think this might be an initial cell of Ditylum brightwellii. If not it's a very early cell. It is three times the size of the other cells. Mary Ann

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Mary, I created an album, Reproduction, and moved your images into it, with small edits to the names on the way. I added in a couple of mine that I think are of an initial cell of a Cymbella. You can

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Here are two of Melosira variants. It's easiest to identify initial cells in linear colonies. Mary Ann

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Thank you for converting the montage to a jpg. It opens fine now. ~Rob K

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Thanks, Mary-Ann. That worked. Tom

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Try this one-Mary Ann

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Hi, Mary. Thanks for the great photos of Detonula pumila. Unfortunately, I can't open the document you sent. I have tried several programs, but none have worked. Could you please let me know the file

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I don't know how to make an album...Here's a quick preview. Detonula pumila bloomed in Puget Sound, Elliot Bay April 2016. Captured live on my microscope. Mary Ann

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Mary, it would be great to see your images. You could create an album and upload your images or let me know how you would like to organize them. Currently, we usually start the album with the name of

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I noticed that several images of initial cells are at the bottom of the search.

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I have some photos and SEMs I can share

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After watching the webinar on June 9, further ideas for expanding the glossary came up, for instance, "initial cell". I used the search feature on diatoms.org which returned 13 entries and have found

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Based on the request of member Peter Hallett, Diatoms of North America (diatoms.org) has added two new terms, ocellus and pseudocellus [1]. Each term is part of the suite of porefield terms, which is

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Recently, one of us was reviewing Pleurosira on Diatoms of North America and noticed that the terms ocelli and orbicular were not in the glossary. Through the public contact form he requested that the

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I recently had the opportunity to work with Sarah Spaulding to revise the glossary of the Diatoms of the US web flora. We have edited existing definitions, added new definitions,created illustrations

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Hi Raymond That's a relief. (sort of) :) Sounds like great sample. My St. Laurent sample has a lot of small forms and very few larger ones except Surirella biseriata which was fully intact. Best of lu

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