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Species Psyllobora vigintimaculata - Twenty-Spotted Lady Beetle

Twenty-spotted ladybird - Psyllobora vigintimaculata Lady Beetle - Psyllobora vigintimaculata On ground cherry - Psyllobora vigintimaculata Which beetle is this? - Psyllobora vigintimaculata Twenty-spotted Lady Beetle - teneral - Psyllobora vigintimaculata Psyllobora vigintimaculata? - Psyllobora vigintimaculata Fungus-eating Lady Beetle - Psyllobora vigintimaculata Tiny Lady Beetle - Psyllobora vigintimaculata
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'
Length 1.75 to 3.0 mm,
width 1.40 to 2.35 mm (2)
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 of the markings is variable:
Dark brown or black:

Brown and dark brown/black:

Orange and black:
widely dist: CA-GA-NF-AK - Map (3), absent in FL (4)
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.
feed on fungus (mostly mildew on leaf surfaces); powdery mildew (6)
Life Cycle
1 and 2 Larvae. 3 and 4 Pupae. 5 Teneral adult. 6 Male and female adults
Type locality: "Missouri" (2)
The orange and black coloration may be a regional variation, appearing in BugGuide photos from NJ south to GA, west to OK and TX.
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.
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.