Metalmarks of North America
- Distribution maps, species accounts, and photos of metalmarks (family Riodinidae) of the United States and northern Mexico.
- http://www.butterfliesandmoths.org/taxonomy?f=17&sci=Riodinidae&com=Metalmarks

Swamp Metalmark (Calephelis muticum)
- Fact sheet describes life history, physical traits, and ecology. Provides images and distribution map.
- http://www.butterfliesandmoths.org/species?l=1640

Arizona Metalmark (Calephelis arizonensis)
- Photos of this species taken in Arizona.
- http://www.vireos.com/arizonametalmark.html

Mormon Metalmark (Apodemia mormo)
- Physical description, range, flight season, and habits. Provides an image.
- http://www.cbif.gc.ca/spp_pages/butterflies/species/MormonMetalmark_e.php

Riodinidae of North America
- Illustrated annotated checklist.
- http://www.nearctica.com/butter/bylist/lriodin.htm