Moths of North Carolina
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5 NC Records

Metanema determinata Walker, 1866 - Dark Metanema Moth


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Taxonomy
Superfamily: Geometroidea Family: GeometridaeSubfamily: EnnominaeTribe: AnagoginiP3 Number: 911252.00 MONA Number: 6820.00
Comments: One of three species in this genus that occur in North America north of Mexico (Pohl et al., 2016), with determinata the only one that has been recorded in North Carolina
Identification
Field Guide Descriptions: Covell (1984); Beadle and Leckie (2012)Online Photographs: MPG, BugGuide, GBIF, BOLDTechnical Description, Adults: Forbes (1948); McGuffin (1987)Technical Description, Immature Stages: Forbes (1948); Wagner et al. (2001)                                                                                 
Adult Markings: A medium-sized, grayish-brown Geometrid with fairly broad, falcate forewings and angulate outer margins on both pairs of wings. The head, body and ground color of the wings is fairly dark gray. The wings are transversely striated with fine darker gray lines; the veins are contrastingly pale. Two pale yellow transverse lines run fairly straight across the wing, the second beginning just before the apex. Hindwings are similar in color and pattern.
Wingspan: 25-30 mm (Forbes, 1948)
Adult ID Requirements: Identifiable from good quality photos of unworn specimens.
Immatures and Development: Larvae are smooth, light brown twig mimics, variegated with gray, white and black mottling. Paler triangular or spade-shaped spots occur on the dorsal surface of the second three abdominal segments (see illustration and description in Wagner et al., 2001).
Larvae ID Requirements: Identifiable from good quality photos, especially where associated with known host plants.
Distribution in North Carolina
Distribution: Recorded in North Carolina only in the New River drainage in the northern 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)

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