Noctuidae : Xyleninae
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Common Rustic
Mesapamea secalis

(Linnaeus, 1758) 2343 / 73.169
Photo © Aidan Smith,  2 July 2023, VC64, Otley, Gen. Det. Female

Similar Yorkshire Species
Lesser Common Rustic
Mesapamea didyma
Small Clouded Brindle
Apamea unanimis
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Yorkshire Status: "Scarce and local, due vast majority undetermined."

Sutton & Beaumont, 1989: This species has been recorded as common throughout all five vice-counties. However, M. didyma (Esper) has been recently separated and it is not yet clear how the two species are distributed in the County. In 1987 four specimens caught in Wharfedale (VC64) were dissected by A.M. Riley. One proved to be M. secalis, the other three being M. didyma (WNS). Out of the Spurn 1987 catch 58 male moths were dissected, 48 proved to be secalis and only ten didyma (BRS). It is likely therefore that the two species are intermixed in most kinds of habitat but further information is needed to work out whether there is any pattern between the relative abundances of the two species in the County as a whole.

Argus 58, 2009: We receive several hundred records each year of 'Common Rustic' and 'Lesser Common Rustic'. These two species are not separable by forewing characters and should always be logged as 'Common Rustic agg.' or 'Mesapamea secalis agg.'. If the genitalia have been examined, please indicate this clearly. Genitalia determination should be done with care. The differences are slight and they are not the easiest species for beginners to dissect. It is likely that both species are common and widespread across the county. 17 'Common Rustics' from Hutton Conyers in 2009 were found to be 12 x Common Rustic and 5 x Lesser Common Rustic. It is surprising that there had been no confirmed records of either species for VC65 until both were encountered on the YNU VC65 excursion to Keld.

VC65. Keld, 24.7.2009 (CHF, JCW, DB et al.). NEW VICE-COUNTY RECORD.

Determination by Genitalia Examination (gen. det.) Required

Recorded in 65 (33%) of 200 10k Squares.
First Recorded in 1968.
Last Recorded in 2023.
Additional Stats

< Double Lobed  |  Common Rustic agg. >
Forewing: 12-16mm
Flight: July - August
Foodplant:   Grasses
Red List Status: Least Concern (LC)
GB Status: Common
Verification Grade:  Adult: 4
List Species Records   [Show All Latest]
Latest 5 Records
Date#VC10k Area
23/08/2023163SK69 - New Rossington / Austerfield
21/08/2023162NZ41 - Stockton-on-Tees
19/08/2023464SE26 - Ripley / Summerbridge
10/08/2023464SD66 - High Bentham
05/08/2023264SD66 - High Bentham
  Immature   Adult   [Show Flight Weeks]
Show Details | 1990 to 2023 | 2000 to 2023 | Graph Key
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