Moths of North Carolina
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Digrammia Members:
148 NC Records

Digrammia gnophosaria (Guenée, [1858]) - Hollow-spotted Angle


Taxonomy
Superfamily: Geometroidea Family: GeometridaeSubfamily: EnnominaeTribe: MacariiniP3 Number: 910822.00 MONA Number: 6405.00 MONA Synonym: Semiothisa gnophosaria
Comments: One of 49 species in this genus recorded in North America (Ferguson, 2008), six of which occur in North Carolina. Digrammia gnophosaria was placed in the primarily willow-feeding Rippertaria Species Group by Ferguson and is the sole member of that group in North Carolina.
Identification
Field Guide Descriptions: Covell (1984; as Semiothisa gnophosaria); Beadle and Leckie (2012)Online Photographs: MPG, BugGuide, iNaturalist, Google, BAMONA, GBIFTechnical Description, Adults: Forbes (1948); Ferguson (2008)Technical Description, Immature Stages: Wagner et al. (2001); Ferguson (2008)                                                                                 
Adult Markings: A medium-small, gray-brown Geometrid. The wings are fairly rounded with a typically uniform ground color, dusted with darker brown. The lines are usually fairly diffuse with the darkest markings at the costa; some specimens show more strongly darkened antemedian and postmedian bands (Ferguson, 2008). Unlike the lines of other members of this genus, the antemedian and median lines typically converge at the inner margin where they may be represented by darker spots or smudges; the hindwings also usually have darker smudges at the corresponding locations, as do the adjacent segments of the abdomen. The postmedian line is represented by a series of dark spots located on the veins, similar to D. ocellinata and ordinata. Also similar to ocellinata, the reniform is situated on the upper portion of the medial line and is represented by a dark ring with a paler center. This spot tends to be more conspicuous than it is in ocellinata (Ferguson, 2008).
Adult Structural Features: Genitalia are distinctive in both sexes (described and illustrated in Ferguson, 2008). Antennae are simple in both sexes. Males have swollen hind tibiae.
Adult ID Requirements: Identifiable from good quality photos of unworn specimens.
Immatures and Development: Larvae are usually green or brown but vary in color and pattern (see Wagner et al., 2001 and Ferguson, 2008 for details and illustrations).
Larvae ID Requirements: Identifiable from good quality photos, especially where associated with known host plants.
Distribution in North Carolina
Distribution: Probably occurs statewide, with the possible exception of the high mountains.
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: Appears to be univoltine, with adults present from early spring to late summer
Habitats and Life History
Habitats: Our records come from a variety of habitats that possess shoreline thickets of willows. Lentic habitats range from beaver ponds, depression ponds, and borrow pits to large reservoir or lake shorelines. Lotic habitats include river, stream, and swamp edges as well as drainage ditches. We have few, if any, records from upland habitats located well away from shoreline willows.
Larval Host Plants: Stenophagous, feeding on Willows (Salix spp.).
Observation Methods: Comes well to blacklights but we have no records from bait.
Wikipedia
See also Habitat Account for Shoreline Shrublands
Status in North Carolina
Natural Heritage Program Status:
Natural Heritage Program Ranks: G5 [S5]
State Protection: Has no legal protection, although permits are required to collect it on state parks and other public lands.
Comments: Found across the state in a variety of wetlands, including disturbed sites such as borrow pits, reservoir shorelines, and drainage ditches. Associated with common, pioneering host plants. Apparently very secure within the state.

 Photo Gallery for Digrammia gnophosaria - Hollow-spotted Angle

34 photos are available. Only the most recent 30 are shown.

Recorded by: David George, L. M. Carlson on 2022-07-03
Orange Co.
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Recorded by: Dean Furbish on 2022-06-26
Wake Co.
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Recorded by: Gary Maness on 2022-05-30
Guilford Co.
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Recorded by: Dean Furbish and Joy Wiggins on 2022-05-15
Wake Co.
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Recorded by: Simpson Eason on 2022-04-22
Durham Co.
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Recorded by: Dean Furbish and Joy Wiggins on 2022-04-12
Wake Co.
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Recorded by: Dean Furbish on 2021-07-08
Wake Co.
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Recorded by: Dean Furbish on 2021-06-18
Wake Co.
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Recorded by: Jim Petranka on 2020-09-07
Madison Co.
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Recorded by: Simpson Eason on 2020-08-18
Durham Co.
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Recorded by: Gary Maness on 2020-08-11
Guilford Co.
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Recorded by: Gary Maness on 2020-07-13
Guilford Co.
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Recorded by: David L. Heavner on 2019-07-18
Buncombe Co.
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Recorded by: Jim Petranka and Becky Elkin on 2019-07-17
Madison Co.
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Recorded by: Gary Maness on 2019-06-21
Guilford Co.
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Recorded by: Gary Maness on 2019-05-23
Guilford Co.
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Recorded by: Jim Petranka and Becky Elkin on 2018-07-19
Madison Co.
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Recorded by: Gary Maness on 2018-05-25
Guilford Co.
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Recorded by: Stephen Hall on 2016-04-29
Hoke Co.
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Recorded by: Paul Scharf, B.Bockhahn, S. Hall on 2015-07-21
Stanly Co.
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Recorded by: Stephen Hall on 2015-06-19
Orange Co.
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Recorded by: Paul Scharf on 2015-05-18
Warren Co.
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Recorded by: B. Bockhahn, P. Scharf, L. Amos on 2015-05-12
Warren Co.
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Recorded by: Lenny Lampel on 2014-07-27
Mecklenburg Co.
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Recorded by: Britta Muiznieks on 2014-05-22
Dare Co.
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Recorded by: Britta Muiznieks on 2014-05-02
Dare Co.
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Recorded by: Britta Muiznieks on 2014-04-29
Dare Co.
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Recorded by: Britta Muiznieks on 2014-04-28
Dare Co.
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Recorded by: Ed Corey on 2013-09-17
Washington Co.
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Recorded by: Kyle Kittelberger on 2011-08-06
Wake Co.
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