Greater Fritillaries or Silverspots, Speyeria [=Argynnis] (Lepidoptera: Nymphalidae)
Speyeria scudder (Nymphalidae: Heliconiinae: Argynnini), commonly known as greater fritillaries or silverspots, are medium to large butterflies (wingspans of 40–90 mm) that represent conspicuous members of North American Lepidoptera. The genus was named in honor of a German entomologist, Adolph Speyer, who specialized in butterfly studies. The origin of the common name “fritillaries” is obscure, and one explanation is that these butterflies resemble the lily genus Fritillaria. Typically orange and black or brown in color, most are recognized by distinctive black spots and bars on the dorsal wing surface and silvery or cream-colored spots located on the ventral surface of the hind wings.
Speyeriafritillaries are restricted to North America (absent in southeastern regions of the United States and all but northern Mexico), although morphologically similar genera exist in other temperate parts of the world and together may be considered the temperate-zone counterpart to tropical...
- Dos Passos CF, Grey LP (1945) A genitalic survey of Argynninae (Lepidoptera, Nymphalidae). Am Mus Novit 1296:1–29Google Scholar
- Ferris CD (1989) Supplement to: a catalogue/checklist of the butterflies of America north of Mexico. Mem Lep Soc No 3, 103 ppGoogle Scholar
- Hammond PC, McCorkle DV (1984) The decline and extinction of Speyeria populations resulting from human environmental disturbances (Nymphalidae: Argynninae). J Res Lepidoptera 22:217–224Google Scholar
- Holland WJ (1931) The butterfly book. Doubleday, Doran and Co., Garden City, NY, 382 ppGoogle Scholar
- Moeck AH (1957) Geographic variability in Speyeria: Comments, records and description of a new subspecies (Nymphalidae). Milwaukee Entomological Society Special Publication, 48 ppGoogle Scholar
- Opler PA, Warren AD (2005) Lepidoptera of North America. 4. Scientific Names List for Butterfly Species of North America, North of Mexico. Contributions of the C.P. Gillette Museum of Arthropod Diversity, Colorado State University, Fort Collins, Colorado. 83 ppGoogle Scholar
- Scott JA (1986)The butterflies of North America: a natural history and field guide. Stanford University Press, Stanford, CA.Google Scholar