Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
 

Register · Log In
HomeGuideID RequestRecentFrassForumsDonateHelp
Clickable Guide
Moths Butterflies Flies Caterpillars Flies Dragonflies Flies Mantids Cockroaches Bees and Wasps Walkingsticks Earwigs Ants Termites Hoppers and Kin Hoppers and Kin Beetles True Bugs Fleas Grasshoppers and Kin Ticks Spiders Scorpions Centipedes Millipedes

Calendar
Upcoming Events

Discussion, insects and people from the 2018 BugGuide Gathering in Virginia, July 27-29

Photos of insects and people from the 2015 gathering in Wisconsin, July 10-12

Photos of insects and people from the 2014 gathering in Virginia, June 4-7.

Photos of insects and people from the 2013 gathering in Arizona, July 25-28

Photos of insects and people from the 2012 gathering in Alabama

Photos of insects and people from the 2011 gathering in Iowa

Photos from the 2010 Workshop in Grinnell, Iowa

Photos from the 2009 gathering in Washington
TaxonomyBrowse
Info
ImagesLinksBooksData
Home » Guide » Arthropods (Arthropoda) » Hexapods (Hexapoda) » Insects (Insecta) » Beetles (Coleoptera) » Water, Rove, Scarab, Long-horned, Leaf and Snout Beetles (Polyphaga) » Series Cucujiformia » Coccinelloidea » Coccinellid group » Lady Beetles (Coccinellidae) » Coccinellinae » Fungus-eating Lady Beetles (Psyllobora) » Twenty-Spotted Lady Beetle (Psyllobora vigintimaculata)

Species Psyllobora vigintimaculata - Twenty-Spotted Lady Beetle

Classification · Other Common Names · Synonyms and other taxonomic changes · Explanation of Names · Size · Identification · Range · Habitat · Food · Life Cycle · Remarks · Print References · Internet References · Works Cited
Twenty-Spotted Lady Beetle - Psyllobora vigintimaculata Twenty-Spotted Lady Beetle - Psyllobora vigintimaculata Psyllobora sp. on mint - Psyllobora vigintimaculata Tiny ladybug larva - Psyllobora vigintimaculata Young adult - Psyllobora vigintimaculata 20-spot lady pupa - Psyllobora vigintimaculata Psyllobora - Fungus-eating Lady Beetles? - Psyllobora vigintimaculata Psyllobora vigintimaculata (Say) - Psyllobora vigintimaculata
Classification
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Coleoptera (Beetles)
Suborder Polyphaga (Water, Rove, Scarab, Long-horned, Leaf and Snout Beetles)
No Taxon (Series Cucujiformia)
Superfamily Coccinelloidea
No Taxon (Coccinellid group)
Family Coccinellidae (Lady Beetles)
Subfamily Coccinellinae
Genus Psyllobora (Fungus-eating Lady Beetles)
Species vigintimaculata (Twenty-Spotted Lady Beetle)
Other Common Names
Wee-tiny Ladybug (1)
Synonyms and other taxonomic changes
Psyllobora vigintimaculata (Say)
Orig. Comb: Coccinella 20-maculata Say, 1824
Explanation of Names
vigintimaculata - Latin '20-spotted'
Size
Length 1.75 to 3.0 mm,
width 1.40 to 2.35 mm (2)
Identification
Gordon's Figures (3)
Pronotum with 4 dark spots; elytron usually with 9 spots, spots partially confluent, pattern variable; the dorsal color pattern will usually separate this species from other N. Amer. species (2)
The base color is always pale (white to light tan); the color and extent of the markings is variable.

Black markings (default throughout range; widespread, except CA):

Bicolored markings (limited to CA, and the only form found throughout the state)

Orange underlay (only occurring in eastern states)

Limited brown markings (arid SW)
Range
widely dist: CA-GA-NF-AK - Map (3), absent in FL (4)
Habitat
In early spring, occurs in numbers about the base of skunk cabbage and on leaves of various shrubs (5). In summer and fall, occurs on any plant with powdery mildew, from ground-level to treetop.
Food
feed on fungus (mostly mildew on leaf surfaces); powdery mildew (6)
Life Cycle
Eggs; newly hatched larvae; larva; larva; pupa; pupa; teneral adult; adults - mated pair
Remarks
Type locality: "Missouri" (2)
Print References
Sutherland, A.M. and M.P. Parrella. 2009. Biology and co-occurrence of Psyllobora vigintimaculata taedata (Coleoptera: Coccinellidae) and powdery mildews in an urban landscape of California. Annals of the Entomological Society of America 102(3): 484-491.
Internet References
Discover Life
EoL
U. C. Davis
Lost Ladybug Project
Works Cited
1.Ladybugs of Alberta
John Acorn. 2007. University of Alberta Press, 169 pages.
2.The Scymnini (Coleoptera: Coccinellidae) of the United States & Canada: Key to genera and revision of Scymnus, Nephus, & Diomus
Robert D. Gordon. 1976. Bulletin of the Buffalo Society of Natural Sciences, Buffalo, NY, Vol 28.
3.The Coccinellidae (Coleoptera) of America North of Mexico
Robert D. Gordon. 1985. Journal of the New York Entomological Society, Vol. 93, No. 1.
4. A distributional checklist of the beetles (Coleoptera) of Florida.
Peck & Thomas. 1998. Florida Department of Agriculture and Consumer Services, Gainesville. 180 pp.
5.A Manual of Common Beetles of Eastern North America
Dillon, Elizabeth S., and Dillon, Lawrence. 1961. Row, Peterson, and Company.
6.American Beetles, Volume II: Polyphaga: Scarabaeoidea through Curculionoidea
Arnett, R.H., Jr., M. C. Thomas, P. E. Skelley and J. H. Frank. (eds.). 2002. CRC Press LLC, Boca Raton, FL.
Contributed by Stephen Cresswell on 24 December, 2005 - 6:27am
Additional contributions by Beatriz Moisset, Chuck Entz, Mike Quinn, v belov, James Bailey, marcie oconnor, Abigail Parker
Last updated 30 September, 2017 - 8:00am

Disclaimer: Dedicated naturalists volunteer their time and resources here to provide this service. We strive to provide accurate information, but we are mostly just amateurs attempting to make sense of a diverse natural world. If you need expert professional advice, contact your local extension office.

Contributors own the copyright to and are solely responsible for contributed content.
Click the contributor's name for licensing and usage information.
Everything else copyright © 2003-2018 Iowa State University, unless otherwise noted.

Bugguide is hosted by:

Printer Friendly Version 		Terms of Use
Privacy Statement
Site Map
Contact