Moths of North Carolina
Scientific Name:
Common Name:
Family (Alpha):
« Home »
View PDFGeometridae Members: Paleacrita Members: 24 NC Records

Paleacrita merriccata Dyar, [1903] - White-spotted Cankerworm Moth


Paleacrita merriccataPaleacrita merriccata
view caption
Paleacrita merriccata
Taxonomy
Superfamily:
Geometroidea
Family:
Geometridae
Subfamily:
Ennominae
Tribe:
Bistonini
P3 Number:
91a1081
MONA Number:
6663.00
Comments: The genus is limited to North America and contains three species of which two occur in North Carolina.
Species Status: Specimens from North Carolina has been barcoded and are quite similar to individuals from Canada and the US.
Identification
Field Guide Descriptions: Covell (1984)Online Resources: MPG, BugGuide, iNaturalist, Google, BAMONA, GBIF, BOLDTechnical Description, Adults: Forbes (1948); (Rindge, 1975)                                                                                 
Adult Markings: Our two species look unlike most other geometrids and can be distinguished by the light reniform spot in P. merriccata which is absent in P. vernata. Females of both species are flightless. In merricata, the body is dark gray or grayish brown and lacks the dark dorsal stripe that is often present in vernata; the ends of the tarsal joints also tend to be darker and not contrasting with the rest of the leg as in vernata (Rindge, 1975).
Forewing Length: 14-18 mm, males; < 1 mm, females (Rindge, 1975)
Adult Structural Features: The reproductive structures of the males are abundantly different from those of of P. vernata. Note the differences in the aedeagus and the position of the valves on the male genitalic capsule. There are numerous rows of spines on the dorsal surface of the pelt which may be involved in heat capture and retention.
Structural photos
Adult ID Requirements: Identifiable from good quality photos of unworn specimens.
Immatures and Development: Undescribed
Distribution in North Carolina
Distribution: Found throughout the state in wooded areas.
County Map: Clicking on a county returns the records for the species in that county.
Paleacrita merriccataAlamance Alexander Alleghany Anson Ashe Avery Beaufort Bertie Bladen Brunswick Buncombe Burke Cabarrus Caldwell Camden Carteret Caswell Catawba Chatham Cherokee Chowan Clay Cleveland Columbus Craven Cumberland Currituck Dare Davidson Davie Duplin Durham Edgecombe Forsyth Franklin Gaston Gates Graham Granville Greene Guilford Halifax Harnett Haywood Henderson Hertford Hoke Hyde Iredell Jackson Johnston Jones Lee Lenoir Lincoln Macon Madison Martin McDowell Mecklenburg Mitchell Montgomery Moore Nash New%20Hanover Northampton Onslow Orange Pamlico Pasquotank Pender Perquimans Person Pitt Polk Randolph Richmond Robeson Rockingham Rowan Rutherford Sampson Scotland Stanly Stokes Surry Swain Transylvania Tyrrell Union Vance Wake Warren Washington Watauga Wayne Wilkes Wilson Yadkin Yancey
Flight Dates:
 High Mountains (HM) ≥ 4,000 ft.
 Low Mountains (LM) < 4,000 ft.
 Piedmont (Pd)
 Coastal Plain (CP)

Click on graph to enlarge
Image showing flight dates by month for High Mountains greater than 4,000 feet, Low Mountains, Piedmont, and Coastal Plain: adults.
Flight Comments: This is one of our “winter” moths, active when most other moth species are surviving in the egg, young larval or pupal stages. Adults are often seen at convenience stores where they are the only moths that come to the lights in January and February.
Habitats and Life History
Habitats: A number of our records come from lakeshores, but at least a few come from Longleaf Pine savannas or wooded sites of uncertain habitats but apparently located away from impoundments.
Larval Host Plants: Host plants are poorly documented, but there is a BugGuide record (George Smiley, 2018) of a larva on Parsley Hawthorn (Crataegus marshallii) in Texas. - View
Observation Methods: Adults come to light but not to bait.
Wikipedia
Status in North Carolina
Natural Heritage Program Status:
Natural Heritage Program Ranks: G4 SNR [S2S3]
State Protection: Has no legal protection, although permits are required to collect it on state parks and other public lands.
Comments: Since few people are searching for moths during cold days in January and February, our records undoubtedly under represent the species status in our state. The causes of population outbreaks and their absence in rural areas are unknown. Flightlessness may allow females to produce more eggs and to attract less attention from predators for otherwise it would seem to be a poor strategy. Much remains to be learned about this interesting species particularly if the caterpillars feed on tree species shunned by P. vernata.

 Photo Gallery for Paleacrita merriccata - White-spotted Cankerworm Moth

Photos: 11
Paleacrita merriccataRecorded by: John Petranka on 2023-01-03
Orange Co.
Comment:
Paleacrita merriccataRecorded by: John Petranka on 2022-11-25
Orange Co.
Comment:
Paleacrita merriccataRecorded by: Michael P. Morales on 2022-01-26
Cumberland Co.
Comment:
Paleacrita merriccataRecorded by: Michael P. Morales on 2022-01-26
Cumberland Co.
Comment:
Paleacrita merriccataRecorded by: Michael P. Morales on 2022-01-05
Cumberland Co.
Comment:
Paleacrita merriccataRecorded by: Michael P. Morales on 2022-01-05
Cumberland Co.
Comment:
Paleacrita merriccataRecorded by: Simpson Eason on 2020-02-04
Durham Co.
Comment:
Paleacrita merriccataRecorded by: j.wyche on 2018-01-11
Gates Co.
Comment:
Paleacrita merriccataRecorded by: Robert Gilson on 2017-02-24
Mecklenburg Co.
Comment:
Paleacrita merriccataRecorded by: J. Cameron on 2014-12-27
Burke Co.
Comment:
Paleacrita merriccataRecorded by: T. DeSantis on 2009-12-13
Camden Co.
Comment: