No theoretical or scientific requisites are required for contributions. On the contrary, these pages are designed to welcome temporary theses, incomplete observations, working papers.
Syntesis and conclusions already have their natural place of scientific development in other media.
Similarly, this is not a forum or a newsgroup: many are already available on the net. Therefore, each contribution must have an  original and autonomous purpose even if dealing with topics already treated.

Last but not least, let me underline the advice already expressed by Felix Lorenz on his site: please, do not consider your shells like a precious treasure (as they are for any of us) lying in a drawer and visited occasionally, in a total solitude. The net is an extraordinary tool to share with many people our little discoveries, the joy  given by these marvels of Nature, the brick of knowledge that any specimen in our collections could represent.

Of course, if requested, the authors and the shell owners will be left anonymous.