Hyperaspis disconotata
Mulsant, 1850
disk-marked lady beetle
Hyperaspis disconotata, commonly known as the -marked , is a small predatory in the . measure approximately 2.30–2.80 mm in length and are characterized by five spots on the . The is to North America, with records from Alberta, Quebec, Massachusetts, Minnesota, New York, and Wisconsin. As a member of the Hyperaspis , it is a specialized of , contributing to of these pests.
Pronunciation
How to pronounce Hyperaspis disconotata: /ˌhaɪpəˈræspɪs ˌdɪsˌkɒnəˈteɪtə/
These audio files are automatically generated. While they are not always 100% accurate, they are a good starting point.
Identification
can be distinguished from other small by the specific pattern of five spots on the . The small size (under 3 mm) helps separate it from larger . are frequently misidentified as due to their waxy coating; they can be distinguished by their more active when disturbed—larvae move quickly, whereas mealybugs remain relatively stationary. The waxy covering also serves as a defense against aggression, unlike the waxy secretions of true which are primarily protective coverings.
Images
Appearance
are small , 2.30–2.80 mm in length. The bear five distinct spots. The overall body coloration is dark with contrasting pale markings. produce a conspicuous waxy coating from glands along their sides, giving them a mealy or woolly appearance that superficially resembles or .
Habitat
Associated with trees and shrubs infested with , particularly magnolia and crapemyrtle. and are found on bark and branches where scale insect colonies establish. adults seek protected locations beneath bark or in leaf litter.
Distribution
North America. Documented from Alberta and Quebec in Canada, and from Massachusetts, Minnesota, New York, and Wisconsin in the United States. GBIF records also indicate presence in Manitoba and New Brunswick, Canada.
Seasonality
are active during spring and summer, laying on -infested plants. Larval development occurs through summer and autumn, with adults emerging in late autumn. Adults overwinter in protected locations and return to plants the following spring.
Diet
Specialized of (). feed on and scale within waxy egg sacs. continue to consume scale insects. A single larva may consume several thousand immature scale insects during development.
Host Associations
- crapemyrtle bark scale - Acanthococcus lagerstroemiae; significant item in eastern North America
- tuliptree scale - Toumeyella liriodendri; documented on magnolia
Life Cycle
with , , , and stages. Eggs are laid on -infested trees in spring. Larvae develop through summer, feeding actively on while concealed beneath their waxy coating. occurs in autumn, with adults emerging to feed briefly before seeking sites. Adults overwinter in bark crevices or leaf litter, becoming active again in spring to mate and oviposit.
Behavior
exhibit rapid escape when disturbed, unlike the sedentary they resemble. Both larvae and are active , with larvae chewing holes in sacs to consume contents. The waxy larval coating appears to deter , allowing larvae to forage in ant-tended scale colonies. Adults and larvae are and visible on bark surfaces when scale are abundant.
Ecological Role
Important agent of . By preying on eruptive scale insect pests, Hyperaspis disconotata helps regulate populations and reduce damage. The contributes to natural suppression of crapemyrtle bark , an pest in eastern North America. Consumption of scales also reduces production and subsequent growth, indirectly benefiting plant health.
Human Relevance
for horticulture and urban forestry. Provides natural of pests on ornamental trees and shrubs, reducing need for . Frequently misidentified and inadvertently killed due to larval resemblance to . of this is encouraged by avoiding broad-spectrum on scale-infested plants.
Similar Taxa
- mealybugs (Pseudococcidae) covered in , superficially resembling ; distinguished by active movement when disturbed and predatory
- crapemyrtle bark scale (Acanthococcus lagerstroemiae) resemble the waxy sacs and coverings of this ; distinguished by mobility and predatory mouthparts
- other Hyperaspis speciesSimilar size, , and ; spot patterns vary among , with H. disconotata specifically having five spots
Misconceptions
are commonly mistaken for or pests and are inadvertently killed by targeting these pests. The waxy coating is protective , not a sign of -feeding pest status.
More Details
Conservation importance
This exemplifies the value of accurate identification in . Its effectiveness against crapemyrtle bark , an pest spreading in eastern North America, makes it a significant worth protecting.
Taxonomic note
The specific epithet 'disconotata' refers to the spotted or marked () pattern. The was described by Mulsant in 1850.