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Horisme tersata ([Denis & Schiffermüller], 1775)
Geometridae: Larentiinae
1782 / 70.127
Photo © Jim Wheeler,  Emily's Wood 27/06/11

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Similar Norfolk Species
Cryptic Fern
Horisme radicaria
Forewing: 14-18mm.
Flight: One generation June-Aug.
Foodplant:   Traveller's-joy.
Red List: Least Concern (LC)
GB Status: Common
Verification Grade:  Adult: 2
Norfolk Status
Calcareous soil habitats.

The Fern Horisme tersata, has now been split in to two species. The new Cryptic Fern Horisme radicaria appears to have been hiding in plain sight for a number of years. Extremely hard to separate and dissection required to confirm any potential specimens of Cryptic Fern. See next species.

Recorded in 34 (46%) of 74 10k Squares.
First Recorded in 1873.
Last Recorded in 2022.

Latest 5 Records
Date#VC10k Area
03/08/2022227TG04 - Blakeney/Cley
31/07/2022227TG04 - Blakeney/Cley
27/07/2022227TG04 - Blakeney/Cley
26/07/2022127TG04 - Blakeney/Cley
25/07/2022127TG04 - Blakeney/Cley
Further info: Horisme tersata
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