Geometridae : Larentiinae
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Photo © Dave Appleton,  18/08/2012 - Bawdeswell

Similar Norfolk Species
Red Twin-spot Carpet
Xanthorhoe spadicearia
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Dark-barred Twin-spot Carpet
Xanthorhoe ferrugata
(Clerck, 1759) 1725 / 70.052
Norfolk status
Believed to be over-recorded in Norfolk.
Very similar to Red Twin-spot Carpet, which has a dark-barred form.

The notch on the inner edge of the cross-band, close to the costa, has proven to be an unreliable method to identify this species.

Red Twin-spot Carpet also has a dark-barred form, leading to confusion.
However a red-barred form of Dark-barred Twin-spot Carpet is apparently rare and should be treated as indistinguishable without dissection of the genitalia.

Using caution, only classic examples with solid black cross-bands should be assigned to this species without dissection of the genitalia.

Recorded in 65 (94%) of 69 10k Squares.
First Recorded in 1873.
Last Recorded in 2020.
Additional Stats

< Red Twin-spot Carpet  |  Flame Carpet >

Determination
List Species Records   [Show All Latest]
Latest 5 Records
Date#VC10k Area
29/07/2020128TF63 - Snettisham/Dersingham
26/07/2020+27TG13 - Baconsthorpe
25/07/2020127TG51 - Winterton/Caister
24/07/2020128TL79 - Methwold/Foulden
24/07/2020128TF83 - N.Creake/Syderstone
 Show Details | 1990 to 2019 | 2000 to 2019 |
Express Record Dark-barred Twin-spot Carpet
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Copyright © Jim Wheeler 2020
   

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Forewing: 12-13mm.
Flight: Two Generations. May-Jun. Jul-Aug.
Foodplant:   Herbaceous plants
Nat Status: Common
Verification Grade:  Adult: 2
 Immature Adult
Further info: Xanthorhoe ferrugata
 
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Underlying maps using Digital Map Data © Norfolk Online Lepidoptera Archive - NOLA™ 2020. © James Wheeler - Norfolk Moths 2007 - 2020. Data © NOLA™ 2020
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