34.002 Pancalia schwarzella (Scarce Violet Beauty)
ws: 11-16; Apr-Jun; dog/hairy violet (Viola canina/hirta); RDB SE.England, C.Scotland
Pancalia schwarzella §1 male
ID: Very similar to P.leuwnhoekella which averages smaller (ws 10-12mm). Male P.schwarzella is distinct in lacking any antennal white section. The two species are distinguished in the key in MBGBI4.1 on the basis that the tornal silver spot is perpendicular from the dorsum in P.leuwenhoekella and slightly outwardly oblique in P.schwarzella. It may be that the position of the antennal white segment provides a clearer distinction between the females: in P.leuwenhoekella the terminal dark segment is shorter than the white segment while in P.schwarzella it is longer (the dark terminal segment ~2x length of the white segment).
Male genitalia: Illustrated but not described in MBGBI4.1 p262, P.leuwenhoekella shown at Moth Dissection.
There is an obvious difference in the shape of the aedeagus - being larger, more evenly rounded and with the apical section narrowing to a point in P.schwarzella; smaller, more angular and with a more rounded apical section which does not narrow to a point in P.leuwenhoekella; the anellus lobes also seem more distinctly asymmetrical in P.schwarzella.
Female genitalia: Illustrated but not described in MBGBI4.1, p262, P.schwarzella shown at dissection group.
In the genus description MBGBI4.1 states that diagnostic differences occur in the shape of the lamella antevaginalis. The drawings show that in P.leuwenhoekella the ostium is transverse and at the level of the anterior margin of the lamella antevaginalis (as also shown in the images of §1); while in P.schwarzella the ostium is globular and anterior to the anterior margin of the lamella antevaginalis (as also shown in the image at Moth Dissection).
Male genitalia: Illustrated but not described in MBGBI4.1 p262, P.leuwenhoekella shown at Moth Dissection.
There is an obvious difference in the shape of the aedeagus - being larger, more evenly rounded and with the apical section narrowing to a point in P.schwarzella; smaller, more angular and with a more rounded apical section which does not narrow to a point in P.leuwenhoekella; the anellus lobes also seem more distinctly asymmetrical in P.schwarzella.
Female genitalia: Illustrated but not described in MBGBI4.1, p262, P.schwarzella shown at dissection group.
In the genus description MBGBI4.1 states that diagnostic differences occur in the shape of the lamella antevaginalis. The drawings show that in P.leuwenhoekella the ostium is transverse and at the level of the anterior margin of the lamella antevaginalis (as also shown in the images of §1); while in P.schwarzella the ostium is globular and anterior to the anterior margin of the lamella antevaginalis (as also shown in the image at Moth Dissection).
Dissection
Male genitalia
§1 Muir of Dinnet, Aberdeenshire; 11/05/2016; male; fw 6.6mm; netted in late morning sunshine
All images © Chris Lewis
All images © Chris Lewis
Page published 28/05/2016 (§1)
