Moths of North Carolina
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606 NC Records

Orthonama obstipata (Fabricius, 1794) - Gem Moth

Orthonama obstipataOrthonama obstipataOrthonama obstipata
Taxonomy
Superfamily:
Geometroidea		 Family:
Geometridae		Subfamily:
Larentiinae		Tribe:
Xanthorhoini		P3 Number:
91a0446		 MONA Number:
7414.00		 Other Common Name:
The Gem
Identification
Field Guide Descriptions: Covell (1984); Beadle and Leckie (2012)Online Resources: MPG, BugGuide, iNaturalist, Google, BAMONA, GBIF, BOLD                                                                                 
Adult Markings: A small Wave that is strongly sexually dimorphic. Females are distinctively reddish-brown and have a conspicuous round white discal spot with a black center. Males are lighter brown with a blackish median area; the discal spot is dark. Female Costaconvexa centrostrigaria are similar to male obstipata in possessing a blacking median band, but have contrasting bands of chocolate brown between the black median area and the whitish antemedian and postmedian lines, whereas these areas are paler brown in obstipata, not contrasting with the ground color (Forbes, 1948). The apex is also marked with a dark wedge in centrostrigaria but is pale in obstipata and bounded below by a dark dash or shade. Additionally, the postmedian in obstipata is usually incurved where it meets the costa but is either slightly excurved or straight in centrostrigaria.
Wingspan: 15-18 mm
Adult ID Requirements: Identifiable from good quality photos of unworn specimens.
Distribution in North Carolina
Distribution:
County Map: Clicking on a county returns the records for the species in that county.
Orthonama obstipata
Flight Dates:
 High Mountains (HM) ≥ 4,000 ft.
 Low Mountains (LM) < 4,000 ft.
 Piedmont (Pd)
 Coastal Plain (CP)

Click on graph to enlarge
Habitats and Life History
Habitats: Our records come from essentially the entire spectrum of open and forested habitats in the state.
Larval Host Plants: Forbes (1948) lists knotweed (Polygonum) and other forbs as host plants. Covell (1984) adds Chrysanthemum, dock (Rumex), elm (Ulmus), mayweed (Matricaria), and ragwort (Senecio). - View
Wikipedia
See also Habitat Account for General Forests and Fields
Status in North Carolina
Natural Heritage Program Status:
Natural Heritage Program Ranks: G5 SNR [S5]
State Protection: Has no legal protection, although permits are required to collect it on state parks and other public lands.
Comments:

 Photo Gallery for Orthonama obstipata - Gem Moth

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

Recorded by: Mark Basinger on 2025-03-24
Brunswick Co.
Comment: 		Recorded by: Jeff Niznik, Kaitlyn Elliott on 2025-03-23
Orange Co.
Comment:
Recorded by: Jeff Niznik on 2025-03-19
Orange Co.
Comment: 		Recorded by: Simpson Eason on 2025-03-16
Durham Co.
Comment:
Recorded by: Mark Basinger on 2025-03-15
Brunswick Co.
Comment: 		Recorded by: Mark Basinger on 2025-03-13
Wilson Co.
Comment:
Recorded by: Jeff Niznik on 2025-03-12
Orange Co.
Comment: 		Recorded by: R. Newman on 2025-02-25
Carteret Co.
Comment:
Recorded by: Dean Furbish on 2025-02-06
Wake Co.
Comment: 		Recorded by: Dean Furbish on 2025-01-29
Wake Co.
Comment:
Recorded by: John Petranka on 2024-12-31
Bladen Co.
Comment: 		Recorded by: Simpson Eason on 2024-12-31
Durham Co.
Comment:
Recorded by: Chuck Smith on 2024-12-19
Davidson Co.
Comment: 		Recorded by: John Petranka on 2024-12-18
Orange Co.
Comment:
Recorded by: Simpson Eason on 2024-12-17
Durham Co.
Comment: 		Recorded by: John Petranka on 2024-12-17
Orange Co.
Comment:
Recorded by: John Petranka on 2024-11-05
Orange Co.
Comment: 		Recorded by: John Petranka on 2024-10-31
Orange Co.
Comment:
Recorded by: John Petranka on 2024-10-30
Orange Co.
Comment: 		Recorded by: Mark Basinger on 2024-10-19
Brunswick Co.
Comment:
Recorded by: R. Newman on 2024-10-12
Carteret Co.
Comment: 		Recorded by: Mark Basinger on 2024-10-08
Wilson Co.
Comment:
Recorded by: Mark Basinger on 2024-10-04
Brunswick Co.
Comment: 		Recorded by: Mark Basinger on 2024-09-26
Wilson Co.
Comment:
Recorded by: Dean Furbish on 2024-09-23
Wake Co.
Comment: 		Recorded by: Mark Basinger on 2024-09-15
Brunswick Co.
Comment:
Recorded by: Mark Basinger on 2024-06-23
Yancey Co.
Comment: 		Recorded by: David George, Jeff Niznik on 2024-06-10
Chatham Co.
Comment:
Recorded by: Mark Basinger on 2024-05-27
Brunswick Co.
Comment: 		Recorded by: Mark Basinger on 2024-05-19
Rowan Co.
Comment: