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Fern
Horisme tersata ([Denis & Schiffermüller], 1775)
Geometridae: Larentiinae
1782 / 70.127
Photo © Greg Bond,  Overstrand, 16/16 July 2012

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Similar Norfolk Species
Cryptic Fern
Horisme radicaria
Forewing: 14-18mm.
Flight: One generation June-Aug.
Foodplant:   Traveller's-joy.
Nat Status: Common
Verification Grade:  Adult: 2
Norfolk Status
Local.
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 33 (45%) of 74 10k Squares.
First Recorded in 1873.
Last Recorded in 2021.

Latest 5 Records
Date#VC10k Area
07/09/2021128TF63 - Snettisham/Dersingham
15/08/2021227TG04 - Blakeney/Cley
14/08/2021227TG04 - Blakeney/Cley
10/08/2021527TG04 - Blakeney/Cley
04/08/2021127TG04 - Blakeney/Cley
Further info: Horisme tersata
 
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