Help: How to Use These Pages

Dear user,

I hope, my page was able to answer your questions in a sufficient way. If not, there can be several reasons. First, the present homepage was supposed to kept to general information. Selected topics are seen to in a more elaborate manner, but so far it has not been possible to describe the whole chapter "molluscs" in a complete way - there are no less than 50,000 species of molluscs. At least the domestic species of terrestrial snails shall be described much more elaborately, as those are the molluscs most likely to be encountered. This work needs time, and until its conclusion (and beyond) you are free to address all your questions directly to me.

There may be further problems that can be solved with the following list of Frequently Asked Questions (FAQ), which in the internet generally is a synonym for problems someone else has already asked the webmaster and the solution to which is therefore published.


There are three strategies when you are looking for something:

a) Search by Search Engine:

There is an integrated search engine on, running by google. There is no need for a special description of its use. It is recommended to use specialized search terms, otherwise very many search results will be found, though the results are restricted to

b) Search by Menu:

Using the new menu following the menu line contents can be found. An example: > Snails and Slugs > Terrestrial Snails > Exotic Snails > Giant African Land Snails. Moving the mouse cursor over a menu subject, the English and the scientific name will be given, whereas for space reasons only the English name is written in the menu.

c) Table of Contents:

A complete table of contents also gives the possibility to look for something directly. There is also a table of contents in the chapter on Roman Snails. Finally a large glossary on snails makes it easier to find single topics on snails or special species.

Problem Solving and FAQ:

I cannot find something!

First you can swap between chapters using the chapter field at the top of the page or be informed about the available pages on the navigation menus on the left part. If you cannot find, what you are looking for that way, you can use the full text search engine on the start page. If the word is present on the homepage, you will find it there. Alternatively you can also follow the link pages to more specialised pages.

I need help with a paper in school or university!

In this case it is recommended to pose open questions directly to me. Many questions I might not asked myself so far, but in any case I might know where to look or whom to ask. Usually it is not allowed to exclusively use the internet to write papers, so the visit of the respective literature pages is recommended.


May I use a picture or a part of the text?

If the picture is mine ([RN]), yes. The same is the case for text passages. It is demanded not to use text passages as your own (that is unfair, somebody else has had a lot of work with them!). Pictures, that are from other pages have been signed as such. In that case I am not free to authorize the use of those pictures, instead you will have to contact the author always mentioned next to the picture.

How should the homepage be cited?

One possible form is: Robert Nordsieck (1999-2012): "The living world of molluscs", Accessed: 20.08.2022.

I strongly recommend not to cite single pages, as those may be moved during reconstruction of the site. The homepage as such is constant, so may be found again after publication of the paper.

This all does not help, I still have open questions!

Do not be afraid, there is still the possibility to ask. As long as I manage, I will be happy to help. But please do not pose twenty questions at once, that are answered somewhere on the homepage, please stay with questions about special problems. Should the solution be of general interest, it will also be published on the site.