Species Psyllobora vigintimaculata - Twenty-Spotted Lady Beetle
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)
Superfamily Cucujoidea (Sap, Bark, Fungus and Lady Beetles)
Family Coccinellidae (Lady Beetles)
Genus Psyllobora (Fungus-eating Lady Beetles)
Species vigintimaculata (Twenty-Spotted Lady Beetle)
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)
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.
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.
|1.||Ladybugs of Alberta|
John Acorn. 2007. University of Alberta Press, 169 pages.
|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.