Moths of North Carolina
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View PDFElachistidae Members: 33 NC Records

Bibarrambla allenella (Walsingham, 1882) - Bog Bibarrambla Moth


Taxonomy
Superfamily: Gelechioidea Family: ElachistidaeSubfamily: DepressariinaeTribe: [Depressariini]P3 Number: 420125.00 MONA Number: 911.00
Comments: Bibarrambla is a monotypic genus. Its sole member (B. allenella) was initially placed in the genus Semioscopis, then moved by Forbes (1923) to Agonopterix. Clarke (1941) later removed it from Agonopterix based on external anatomical and genitalic differences.
Identification
Field Guide Descriptions: Beadle and Leckie (2012)Online Photographs: MPG, BugGuide, iNaturalist, Google, BAMONATechnical Description, Adults: Clarke (1941), Hodges (1974)                                                                                 
Adult Markings: The following is primarily based on the description by Clarke (1941). The labial palp is sordid white and lacks a brush. The second segment is shaded or speckled with fuscous and has a narrow, incomplete, brownish-fuscous annulus slightly before the apex. The third segment has a spot anteriorly at the base and a broad, brownish fuscous annulus above the middle. The antenna is sordid white and narrowly annulated with fuscous. The head, thorax, and forewing are grayish white and suffused and speckled with fuscous. At the basal third of the wing there are two fuscous discal spots of raised scales. These are sometimes confluent, and are followed by ochreous and whitish scales. At the end of the cell there is a black-edged, white discal spot of raised scales. These are also followed by some ochreous scaling that may form a diffuse blotch. A series of fuscous spots occurs along the costa and around the termen to the inner margin, and the costa is sometimes narrowly edged with pink. The cilia are sordid white with a broad, pale grayish-fuscous sub-basal band. The hindwing is pale grayish fuscous and darker apically, and the cilia are sordid white with a broad, pale grayish fuscous sub-basal band. The legs are sordid white and suffused and annulated with fuscous except at the joints and on the hind tibia. The abdomen is pale ochreous and suffused with fuscous above. This species is rather nondescript. The two groups of raised scales that approximate the AM and PM lines, and that usually have ochreous scaling behind them, are diagnostic features.
Wingspan: 19-22 mm (Clarke, 1941).
Forewing Length: 8.5-10.5 mm (Hodges, 1974)
Adult Structural Features: Clarke (1941) provides detail descriptions and illustrations of the male and female genitalia, along with genitalic characters that help to distinguish this species from Agonopterix.
Adult ID Requirements: Identifiable from good quality photos of unworn specimens.
Immatures and Development: The larvae feed on hardwoods and are leaftiers, but very little is known about their larval ecology and life history.
Distribution in North Carolina
Distribution: Bibarrambla allenella is found in North America and primarily has a northern distribution. The range includes most of southern Canada from British Columbia to Nova Scotia. In the US the range extends from the northeastern states westward to Minnesota and Wisconsin and southward along the Appalachian region to eastern Tennessee, western North Carolina, and northern Alabama. As of 2020 all of our records are from the western mountains, and mostly from lower elevation sites.
County Map: Clicking on a county returns the records for the species in that county.
Flight Dates:
 High Mountains (HM) ≥ 4,000 ft.
 Low Mountains (LM) < 4,000 ft.
 Piedmont (Pd)
 Coastal Plain (CP)

Click on graph to enlarge
Flight Comments: Adults have been recorded from April through November in different areas of the range, with most activity from May through August. Populations in North Carolina appear to be bivoltine, with an initial brood in May and June and a second in late July and August.
Habitats and Life History
Habitats: Local populations are associated with hardwood forests or mixed pine-hardwood forests. Our records are mostly from lower to mid-elevations in the mountains, and in habitats that range from floodplain forests to rich hardwood slopes.
Larval Host Plants: This species is polyphagous and feeds on a variety of hardwoods. Hodges (1974), Baker (1960), and Robinson et al. (2010) list alders (including Gray Alder, Alnus incana), birches that include Paper Birch (B. papyrifera) and Gray Birch (B. populifolia), and various oaks (Quercus spp.) and willows (Salix spp.).
Observation Methods: The adults are attracted to lights.
Wikipedia
See also Habitat Account for General Hardwood Forests
Status in North Carolina
Natural Heritage Program Status:
Natural Heritage Program Ranks: GNR SU
State Protection: Has no legal protection, although permits are required to collect it on state parks and other public lands.
Comments: As of 2020, we have seven site records. This species appears to be locally common, but more information is needed on its distribution and abundance before we can assess its conservation status.

 Photo Gallery for Bibarrambla allenella - Bog Bibarrambla Moth

Photos: 14

Recorded by: Jim Petranka on 2021-06-01
Madison Co.
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Recorded by: Jim Petranka and Becky Elkin on 2021-05-21
Madison Co.
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Recorded by: Jim Petranka on 2021-05-17
Madison Co.
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Recorded by: Jim Petranka and Becky Elkin on 2020-08-15
Madison Co.
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Recorded by: Jim Petranka and Becky Elkin on 2019-08-05
Madison Co.
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Recorded by: Jim Petranka and Becky Elkin on 2019-08-01
Madison Co.
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Recorded by: Jim Petranka and Becky Elkin on 2019-08-01
Madison Co.
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Recorded by: Stephen Hall on 2019-06-30
Ashe Co.
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Recorded by: Jim Petranka and Becky Elkin on 2019-06-07
Madison Co.
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Recorded by: Jim Petranka and Becky Elkin on 2019-05-28
Buncombe Co.
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Recorded by: Jim Petranka on 2019-05-27
Madison Co.
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Recorded by: Jim Petranka and Becky Elkin on 2018-08-17
Madison Co.
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Recorded by: B. Bockhahn, K. Kittelberger, P. Scharf on 2015-06-18
Avery Co.
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Recorded by: B. Bockhahn, K. Kittelberger, P. Scharf on 2015-06-18
Avery Co.
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