Peter Pearson's picture

Oyster

Observed: 15th November 2012 By: Peter PearsonPeter Pearson’s reputation in InvertebratesPeter Pearson’s reputation in InvertebratesPeter Pearson’s reputation in InvertebratesPeter Pearson’s reputation in Invertebrates
oyster1
oyster2
oyster3
Description:

This group of oyster shells was found on the beach at Walton on the Naze. They had obviously been detached from a seawall or groyne as the joints in the stone work can clearly be seen on the back of the shells. I believe they may be Crassostrea angula, the Portuguese Oyster. However the adductor scar is not dark as shown on various publications and images

Identifications
Species interactions

No interactions present.

Comments

dejayM's picture

Pacific Oyster

NO agreements or additional comments in over four years - a poor show.
Well, there is confusion, not helped by Grahams assertion about a new name and iSpot Dictionary's error in accepting BOTH as Pacifics (unless one persists with the Drop-down).
We are not helped very much by the Other Observations - iSpot is obstinately blind. What's more, C.angulata IS in the Drop-down but does not persist when adding the new ID (save)

Now see http://www.marinespecies.org/aphia.php?p=taxdetails&id=146900
"The Portuguese oyster, Crassostrea angulata, is a species of oyster found in the southwest Iberian Peninsula, closely related to the Pacific oyster." is from Wiki.
There is a decent treatise here http://www.seafareproject.eu/files/3213/8624/1817/4_Frederico_SEAFARE_3D... but it does not give us good guidance about separation.
This appears to be a concretion of three specimens and I am tempted to assume angulata, so have added agreement, NOT to suggest I know but to make the Portugese common name Likely (that ID panel is at fault)

If you are still here Peter, please change the Habitat tag to Marine (it is a marine species) and add the Descriptive tag ProjectM1 (and perhaps Coastal if you wish) - sending it to the Marine's Project Gallery >>Marines Project<<
ðJ

dejayM's picture

Excuse me

As you can see, I challenged the iSpot ID computer and it won, hands down.
I tried Esturary Oyster in the common name - but is simply had a fit and refused to comply, returning to 'Add a revised ID'
I then tried Crassostrea angulata in the common mame as well and then, simply and only, the Scientific name (where it IS in the Drop-down).
So it has run its course and can be allowed to sink gently into history.
I hope no-one is offended and, if anyone does come, then read Jo's comment here http://www.ispotnature.org/node/392924#comment-148080
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If you are still here Peter, please change the Habitat tag to Marine (it is a marine species) and add the Descriptive tag ProjectM1 (and perhaps Coastal if you wish) - sending it to the Marine's Project Gallery >>Marines Project<<