BOLORIA IMPROBA
| English name: | UK: Dusky-winged Fritillary. US: Dingy Arctic Fritillary. |
| Norwegian name: | Dvergperlemorvinge. |
| Auctor: | (Butler, 1877) |
| Original description: | as Argynnis Improba in Ent. Month. Mag., 13 : 206. |
| Syn.: | - - - |
| Type locality of nominate species: | Winter Cove and Cambridge Bay, NW Territories, Canada. |
| Worldwide distribution: | Mountains of Arctic Fennoscandia. Polar tundra of Siberia to Chukotka, even Novaya Zemlya Is., Alaska, |
| North-western Canada, small areas of Colorado and Wyoming. | |
| Subspecies in Norway: | B.i.improbula. |
| Recognized subspecies: | B.i.improba (Butler, 1877) - Alaska, North-west Canada. |
| B.i.acrocnema - San Juan Mts., Colorado. | |
| B.i.harryi - Wind River Mts., Wyoming. | |
| B.i.improbula Brykner, 1920 - Northern Fennoscandia. | |
| Notes: | According to Tuzov & al. (2000), specimens from East Chukotka (the extreme North-East tip of Russia, at the |
| Bering Strait) resemble f. youngi (Holland, 1900), a yellowish form described from Alaska. | |
B.improba improbula | |
| Auctor: | (Bryk, 1920) |
| Syn.: | as Argynnis improba f. improbula in Ent. Tidskrift, 41:131. |
| Type locality of subspecies: | Torneträsk, Swedish Lapland. |
| Distribution in Norway: | Mountains of inner Troms, North Norway. |
| Notes: | B.improba is one of Norway's rarest butterflies. Until recently, the only confirmed records from Norway were from |
| 1893 (leg. Hans Jacob Sparre Schneider), 1922 (leg. Tron Soot-Ryen) and 1948 (leg. Henrik Bruun). | |
|
But in 2008 a previously unknown population was found in Bardu kommune (leg. Lars Andersen). |
|
| Today improba is recorded from localities in Troms regions, elevation approx 900 - 1130 m above sea-level. | |
| B.improba inhabits the most exposed glacial plateaus, where it flies close to ground, or just crawls among low | |
| flowers in the strong wind. | |
| Described forms found in Norway: | - - - |
| Etymology: | improba: improbus = below standard, of bad quality, poor, inferior (a rather improper name for a butterfly surviving |
| in some of this planet's most harsh areas!). | |
| improbula is a patronymic derivation from improba. | |
| 1 | 2 | 3 |
|
BOLORIA IMPROBA IMPROBULA |
|
Specimen |
Kommune |
Coll. date |
Legit |
In coll. |
Remarks | ||
| 1 | 147 | TRI | Bardu | 18-VII-1893 | Hans Jacob Sparre Schneider | ZMO | m |
| 2 | 148 | TRI | Målselv | 20-VII-1922 | Tron Soot-Ryen | ZMO | m |
| 3 | 156 | TRI | Storfjord | 10-VII-1948 | Henrik Bruun | ZMO | m |
| 1 | 2 | 3 |
|
BOLORIA IMPROBA IMPROBULA - vental view |
|
Specimen |
Kommune |
Coll. date |
Legit |
In coll. |
Remarks | ||
| 1 | 147 | TRI | Bardu | 18-VII-1893 | Hans Jacob Sparre Schneider | ZMO | m |
| 2 | 148 | TRI | Målselv | 20-VII-1922 | Tron Soot-Ryen | ZMO | m |
| 3 | 156 | TRI | Storfjord | 10-VII-1948 | Henrik Bruun | ZMO | m |
For further notes, photos and
maps of this species, check out
the Lepidoptera homepage of the Zoological Museum of
Oslo/Norwegian Entomological Society/Skogforsk
(text
in Norwegian).
Butterflies of Norway | Systematic
list of the Norwegian butterflies |
Bibliography
Acknowledgements | Links | Maps of
Norway | Updates
Main page
Birdwing Butterflies of the World
Section | Systematic
list of the Birdwing Butterflies
© Tony Nagypal, 2001-2011