orchid_b's picture

Common Marbled Carpet

Observed: 7th June 2013 By: orchid_borchid_b’s reputation in Invertebratesorchid_b’s reputation in Invertebratesorchid_b’s reputation in Invertebratesorchid_b’s reputation in Invertebrates
IMG_3666
Description:

One of the most numerous moths I'm getting at the moment. The 'marbled' part is easy. The problem is separating Common and Dark Marbled Carpets. But at this time of year I think they are all most likely to be Common - Dark is not on the wing until July.

Identifications
Species interactions

No interactions present.

Species with which Common Marbled Carpet (Chloroclysta truncata) interacts

Comments

Douglas's picture

marbled carpets

Hi Jamie,

With these, if it the form with light brown/orange central area on the forewing (as in your moth) it is certainly Common Marbled Carpet.

Dark never exists in this form.

Best wishes,

Douglas

orchid_b's picture

Useful tip Douglas, thanks.

Useful tip Douglas, thanks.

Jamie from Briantspuddle

Douglas's picture

marbled carpets

Hi David,

See my comment above. In this case, we can be sure it is CMC.

I agree, IDs should never be based on phenology but just to pick up on your point that early emergences seem likely, surely with this year being so far behind, early emergences are more unlikely?

Best wishes,

Douglas

DavidHowdon's picture

Light brown form

To me this one does not look like the typical light brown form which is guaranteed to be CMC (http://www.ispot.org.uk/node/337141 is what I would regard as a typical example). If I got this moth in my trap I would not be confident claiming it as CMC just on the upperside.

Douglas's picture

marbled carpets

Well they're variable so it will not be identical to other CMCs but, regardless of this, a form with this central area of light brown is CMC - as you remark in your comment of a similar individual here: http://www.ispot.org.uk/node/291574

If I got this in my trap I would be completely confident in recording it as CMC.

It might also be important to note that (my experience anyway) the underside is not always the be all and end all of the ID of this pair - it too can be variable and in some individuals ambiguous. I notice Hants moths request photos of both under AND upperside for DMC claims.

Apologies for my last comment, by the way, I had misread your notes about early emergences.

Best wishes,

Douglas

MikeWall's picture

CMC

As Hantsmoths owner and one of the county recorders, I concur that we certainly do require evidence of claimed Dark Marbled Carpet records. It is a very rare species in our neck of the wood and almost all claims turn out to be CMC. This moth is 100% the latter, due to the shallowness of the teeth on the postmedian line, and the lack of any white on the wing is also a pointer.

Mike