Macaria fissinotata
(Walker, [1863])
Hemlock Angle
Macaria fissinotata, commonly known as the hemlock angle, is a small geometrid to eastern North America. are active from late spring through summer, with periods varying by latitude. The is strongly associated with coniferous forests, where its feed on hemlock, spruce, and fir trees. The specific epithet refers to the often-split spot that serves as a identification feature.
Pronunciation
How to pronounce Macaria fissinotata: //məˈkɛəriə ˌfɪsɪnoʊˈtɑːtə//
These audio files are automatically generated. While they are not always 100% accurate, they are a good starting point.
Identification
The 's large spot, often divided into two separate markings, distinguishes this from similar Macaria. The small size (22–25 mm wingspan) and association with Tsuga, Picea, or Abies plants support identification. Separation from other Macaria species requires examination of or careful comparison of pattern elements.
Images
Habitat
Coniferous forests dominated by hemlock, spruce, or fir. Occurs in mature and semi-mature stands where trees are present.
Distribution
Eastern North America: Nova Scotia south to Georgia, west to Kentucky, north to Ontario. Core range spans the Appalachian and Atlantic regions.
Seasonality
May to September in the southern part of the range; May to July in Quebec. or depending on latitude, with longer periods at lower latitudes.
Diet
feed on Tsuga (hemlock), Picea (spruce), and Abies balsamea (balsam fir). feeding habits not documented.
Host Associations
- Tsuga - larval primary
- Picea - larval secondary
- Abies balsamea - larval secondary
Life Cycle
with , , , and stages. Larval development occurs on conifer foliage. Specific timing of stages not documented.
Ecological Role
Larval on conifers; contributes to in eastern North coniferous forest . impacts on trees appear minimal under normal conditions.
Human Relevance
No significant economic or cultural importance. Occasionally encountered by foresters and naturalists in coniferous . Not considered a forestry pest.
Similar Taxa
- Other Macaria speciesShare similar shape and pattern; require careful examination of spot configuration and for definitive separation
- Other Ennominae geometridsSimilar resting posture and angling; association and spot pattern help distinguish M. fissinotata
More Details
Etymology
The specific epithet combines Latin 'fissus' (cleaved or split) and 'notatus' (mark), referring directly to the divided spot.