Cercyonis sthenele
Cercyonis sthenele, the Great Basin wood-nymph, is a North American butterfly in the family Nymphalidae.
Great Basin wood-nymph | |
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Cercyonis sthenele paulus, male | |
Scientific classification ![]() | |
Kingdom: | Animalia |
Phylum: | Arthropoda |
Class: | Insecta |
Order: | Lepidoptera |
Family: | Nymphalidae |
Genus: | Cercyonis |
Species: | C. sthenele |
Binomial name | |
Cercyonis sthenele (Boisduval, 1852) | |
Synonyms | |
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Description
It is dark brown with two eyespots on the forewing with the upper larger than the lower.[2]
The wingspan measures 39–44 mm (1.5–1.7 in). Its flight period is from late June to late August.[3]
Subspecies
The following subspecies are recognised:[4]
- C. s. paulus (Edwards, 1879)
- C. s. masoni Cross, 1937
Similar species
- Common wood-nymph (Cercyonis pegala) – larger, eyespots similar in size
- Small wood-nymph (Cercyonis oetus) – lacks lower eyespot in males, lower eyespot is closer to margin than upper eyespot in females[3]
Range and distribution
Ranges over much of the western United States and reaches to southern British Columbia, Canada.[3]
Larval host plants
Larvae feed on various species of grass. The first instar hibernates.[3]
gollark: That lets you work out a/b/c/d, which you can substitute back into (x-1)(ax^3+bx^2+cx+d).
gollark: So:2 = a (x^4 terms)p = b - a (x^3 terms)-6 = c - b (x^2 terms)q = d - c (x terms)6 = -d (constant terms)
gollark: So you can do `2x^4+ px^3 - 6x^2 + qx + 6 = ax^4 + (b-a)x^3 + (c-b)x^2 + (d-c)x - d`, and you know the coefficients on x^4 and so on should be equal.
gollark: Which you can then simplify to ax^4 + (b-a)x^3 + (c-b)x^2 + (d-c)x - d.
gollark: ax^4 + bx^3 + cx^2 + dx - ax^3 - bx^2 - cx - d
References
- Butterflies of America
- Brock, Jim P.; Kaufman, Kenn (2003). Butterflies of North America. New York, NY: Houghton Mifflin. ISBN 0-618-15312-8.
- "Great Basin Wood-nymph". Canadian Biodiversity Information Facility. 2002. Retrieved 18 October 2010.
- "Cercyonis Scudder, 1875" at Markku Savela's Lepidoptera and Some Other Life Forms
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