dejayM's picture

Colourful Limpet

Observed: 25th May 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
from above
Description:

Seems pretty rare here. Appears to be on a sea squirt - in itself an unusual habitat.
One of two, discovered in a photo - I did not properly observe it for details - though it is about 16mm long.
..........
CORE Edit - changed from Keyhole to Colourful Limpet

Identifications
Species interactions

No interactions present.

Comments

ChrisMcA's picture

Not one I've seen

Not one I've seen; I put in the name approved by Worms (& species.com) but there's another on Ispot under T.tessulata

dejayM's picture

names

Thanks Chris.
the correct (new?) name is Testudinalia testudinalis
http://www.marinespecies.org/aphia.php?p=taxdetails&id=140276

and Wikki has it right too.
You can correct the ID if you wish, (after checking!)
ðj

JoC's picture

Botryllus schlosseri

looks a likely candidate for the sea squirt. Flat, encrusting colony, zooids in stellate systems.

Jo

ChrisMcA's picture

Agreed JoC, not just likely,

Agreed JoC, not just likely, the only seasquirt

dejayM's picture

chatting..

Thanks you two (talking among yourselves!)
I am quite happy with your ID Chris - I was really uncertain.
As for Botryllus schlosseri (Star ascidian) Jo, I have a few photos but some are very UNconvincing, making me wonder whether Chris is right (to be so adamant here and in others' posts). My new book backs him.
The one here, though, IS pretty obvious isn't it?
I have to hand (borrowed today), you'll both be appalled to learn (novice!), Hayward & Ryland; what an inspiring delight!
I found one on the web just now for £21 inc. postage - ordered.
I am wading through 80 or so Marine pictures worthy of posting, so some more will come soon.
Thanks, both of you again.
ðerek

ChrisMcA's picture

Thanks Dejay, but even that

Thanks Dejay, but even that hasnt been accepted by EOL (& same with the only other common tortoiseshell limpet at http://www.ispot.org.uk/node/321196 )

dejayM's picture

tits

A final name correction (for the time being), removing the tits. I wonder how you came to that Chris?
and....
I am interested in your assertion "the only seasquirt" in ..'Not Just Likely'
ð

JoC's picture

Botryllus schlosseri

I think that Chris means that B. schlosseri is the only sea squirt with zooids in stellate pattern that is recorded from our coasts. With which I agree. I said 'likely' as I prefer to make suggestions rather than be too dogmatic. I like to think it encourages further interest in the observers, but who knows.

You are going to wonder how you managed before you had your own H&R. Worth every penny, & you got it at a bargain price.

Jo

dejayM's picture

word

I guess so but I took him at his word until I found HIS http://www.ispot.org.uk/node/277241

H&R. Yes, it's the 2011 reprint, lighter-weight paper (still heavy) but bolder print.
Amazing that is was post free weighing 3lbs!
I found it at Amazon via Alibris.co.uk. Another sits there now for £23 plus post.
Mine is already well thumbed. I am waiting, poised for lower tides! But I still have a lot of mystery pictures.
Thanks Jo.
ð

dejayM's picture

Reference

I now discover, far too late in life, that actually "Testudinalia testudinalis, the only species of intertidal limpet in the northwest Atlantic, feeds on the encrusting coralline alga Clathromorphum circumscriptum."
It's from here >>A useful Treatise<<. American yes, but useful reading. Though I cannot be certain that is it the only Intertidal Limpet in that region or the only one that feeds on corallines. Never mind. But note, mine seems to be feasting on B. schlosseri.

JoC's picture

Intertidal limpet

I have read (some of) the article, and was startled by the claim, which you cite, of being the ONLY intertidal limpet in The North West Atlantic intertidal zone. That surprised me, so I checked GBIF but I couldn't find any other limpets there. Not an exhaustive search, and I can stll hardly believe it, since limpets of several species are ubiquitous on UK shores. I learn something on iSpot every day.
I think limpets are herbivores & would not be eating Botryllus, but maybe I am wrong about that too.
The reported lack of homing behaviour is interesting too.

Jo

dejayM's picture

Don't ask

Like you, I tested the proposal to find it is the only limpet
There are three records of Patella on the Eastern coast of North America (AMAZING!) - but all as preserved specimens in collections!
As for South America and the Gulf, well the evidence is interesting, as most appear to be in collections but one Patella surinamensis was found in, well just off, Suriname! It appears to have been found in very deep water but on the surface - hard to explain, best not ask eh...

This post was formed very early in my newly acquired obsession. You will note that I did, even then, express surprise about its presence on the tunicate. I would not have seen it as unusual when photographing, it was when I came to research before posting that I read about its biology.