Synonyms and other taxonomic changes
Psyllobora vigintimaculata (Say)
Orig. Comb: Coccinella 20-maculata Say, 1824
Explanation of Names
vigintimaculata - Latin '20-spotted'
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)
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)
1 and 2 Larvae. 3 and 4 Pupae. 5 Teneral adult. 6 Male and female adults
Type locality: "Missouri" (2)
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.