Geometridae : Larentiinae
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Photo © Bill Urwin

Similar Norfolk Species
Treble-bar
Aplocera plagiata
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Lesser Treble-bar
Aplocera efformata
(Guenée, 1857) 1868 / 70.193
Norfolk status
Much rarer than Treble-bar (A.plagiata).

Lesser Treble-bar is usually slightly smaller, with less intense dark cross-bands.
The most reliable way to separate the two species is by looking at the tip of the abdomen from below.

Treble-bar Male has a straighter, more pointed abdomen tip.
Female showing a distinctive tubular shape to the terminal segment of the abdomen.

Lesser Treble-bar Male abdomen is shorter and blunter, with slightly curved claspers.
Female abdomen blunt. This is less obvious and care should be taken.

(see abdomen comparison diagram)

Please retain / photograph all possible Lesser Treble-bar specimens.

Retained Specimen / Photograph will be Required.

Recorded in 15 (22%) of 69 10k Squares.
First Recorded in 1940.
Last Recorded in 2019.
Additional Stats

< Treble-bar  |  Streak >

Determination
Treble-bar and Lesser Treble-bar abdomen comparison - J. Wheeler
List Species Records   [Show All Latest]
Latest 5 Records
Date#VC10k Area
30/05/2019128TF63 - Snettisham/Dersingham
05/08/2017128TL89 - Bodney/Lynford
03/09/2013228TL79 - Methwold/Foulden
23/08/2012128TF63 - Snettisham/Dersingham
16/05/2011127TG10 - Wymondham/Cringleford
Show Details | 1990 to 2018 | 2000 to 2018 |
Express Record Lesser Treble-bar
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Copyright © Jim Wheeler 2019
   

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Forewing: 16-19mm.
Season: Two generations May-June. Aug-Sept.
Foodplant:   St John's-worts
Nat Status: Common
Verification Grade:  Adult: 3
 Immature Adult
Further info: Aplocera efformata
 
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Underlying maps using Digital Map Data © Norfolk Online Lepidoptera Archive - NOLA™ 2019. © James Wheeler - Norfolk Moths 2007 - 2019. Data © NOLA™ 2019
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