Its upperside is dark orange with many rows of black markings and black wing margins. Its underside is a light brown with many silvery-white spots. Wingspan ranges from 50–64 millimetres (2.0–2.5 in).[1][4]
Wikimedia Commons has media related to Speyeria atlantis.
^ a bAtlantis Fritillary, Butterflies of Canada
^Atlantis Fritillary, Butterflies and Moths of North America
^"Connecticut's Endangered, Threatened and Special Concern Species 2015". State of Connecticut Department of Energy and Environmental Protection Bureau of Natural Resources. Retrieved 19 January 2018.
^Jim P. Brock and K. Kaufman. Kaufman Field Guide to Butterflies of North America, New York, NY: Houghton Mifflin, 2003.
^"Atlantis Fritillary Speyeria atlantis (W.H. Edwards, 1862) | Butterflies and Moths of North America".
^Geest, Emily A; Baum, Kristen A (2021-06-01). "Environmental Variables Influencing Five Speyeria (Lepidoptera: Nymphalidae) Species' Potential Distributions of Suitable Habitat in the Eastern United States". Environmental Entomology. 50 (3): 633–648. doi:10.1093/ee/nvab001. ISSN 0046-225X. PMID 33561201.
^ a bBreed, Greg A.; Stichter, Sharon; Crone, Elizabeth E. (2013). "Climate-driven changes in northeastern US butterfly communities". Nature Climate Change. 3 (2): 142–145. Bibcode:2013NatCC...3..142B. doi:10.1038/nclimate1663. ISSN 1758-6798.
^"Speyeria Scudder, 1872" at Markku Savela's Lepidoptera and Some Other Life Forms