Naming
The species was first described by William Kirby in 1837There are two recognised subspecies:
⤷ "Syngrapha rectangula rectangula"
⤷ "Syngrapha rectangula nargenta"
Food
The larvae feed on "Abies balsamea", "Tsuga heterophylla", "Picea glauca" and "Pseudotsuga menziesii".References:
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