dejayM's picture


Observed: 24th April 2013 By: dejayM
Biological Recording In ScotlandHighland Biological Recording GroupOrkney Biodiversity Records Centre
dejayM’s reputation in InvertebratesdejayM’s reputation in InvertebratesdejayM’s reputation in InvertebratesdejayM’s reputation in Invertebrates

One of two quite common ones here in Orkney - see
(Which may well be misidentified)
The closer I look the more I see - obviously.
But, with so FEW agreements in Marine Invertebrates, it is difficult to be certain of anything.
See Comment

Species interactions

No interactions present.


dejayM's picture

chitons generally..

There are a good number of Chitons posted in iSpot (though with very few agreements) but little UK 'stuff' on the web.
Typical of good photo-postings is this one but with only one agreement (so far)
Here is a reasonable small treatise, one which helped me
My books are poor..

JoC's picture

The closer you look, the more you see

The lack of agreement for some of the marine invertebrates on iSpot could be because the comments and photos as posted do not provide sufficient information. I am sitting here with Ryland & Haywards Handbook of the marine fauna of North-West Europe, 1995. Costs about £40 (but it's cheaper than the two volume complete version and good enough most of the time). For chitons, it says, an examination of the GIRDLE is needed to determine if it is fringed with spines and with calcified granules, spines, or small plates on the upper surface. Then whether the intermediate valves are keeled or rounded. Getting a good photo may be difficult without removing ( and probably killing) the chiton. However, using a hand lens one can see details which can be recorded in the comments.

On-line, this site has a description, a photo and, in many cases the diagram from Ryland. It could be possible to have accessible in the field, though seawater and technology don't always mix....
Marine species identification portal

L. crinita? There is Acanthochitona crinitus, but that has dense tufts of bristles on the girdle, which you said 'no' to.

So, back to the shore with a hand lens and a waterproof iPhone, and an ID is a certainty; possibly.


dejayM's picture


Bless you Jo; curse you Jo!
I live close to the shore; I find chitons regularly, but then I find something equally compelling!
I have removed them in my day (which is only four weeks long!) and they seem to do quite well. what's an iPhone..? joking..
I know the site you linked very well.
This is your book (for those who have the £44!)
There's one in AbeBooks for £30.
Anyway, I don't think an ID is too necessary (though I'd like to be more certain)- it's the commenting, discussion and the encouragement to go forth that is necessary and encouraging.You are good for my soul, which, in turn, will be good for my grandson..

JoC's picture

Buy the book..

..for your grandson - it's never too early to start on marine invertebrates.
I agree about the discussion, etc. and have seen the new forum post which is a good idea.


dejayM's picture

Acanthochitona crinita

In my ID Notes I have mentioned L.crinitus - it seems not to exist.

However, there are reliable records of Acanthochitona crinita here in Scape Flow.
It should occur on the lower shore only but who knows.
More added later
Note the Search Links in the ID panel are for L.scabridus - a mistake?
Also note that the preferred name for L.cinereus is L.cinerea