Uresiphita

Hübner, 1825

Species Guides

Uresiphita reversalis(Genista Broom Moth)

Uresiphita is a of crambid comprising approximately six recognized distributed across North America, New Zealand, Europe, and the Middle East. The genus is notable for larval of quinolizidine alkaloids from leguminous plants, a chemical defense mechanism against . Several species have expanded their ranges through association with introduced host plants.

Uresiphita reversalis by no rights reserved, uploaded by Scott Loarie. Used under a CC0 license.

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Uresiphita reversalis by Jacy Lucier. Used under a CC BY-SA 4.0 license.

Pronunciation

How to pronounce Uresiphita: //jʊˌrɛsɪˈfaɪtə//

These audio files are automatically generated. While they are not always 100% accurate, they are a good starting point.

Identification

of Uresiphita are small to medium-sized with wingspans typically 20-35 mm. Uresiphita reversalis has a distinctive white body and legs, with bright yellow or orange hindwings usually concealed at rest. Larvae are aposematically colored, often with bold patterns suggesting chemical defense.

Images

Habitat

include urban and suburban areas, gardens, and natural vegetation supporting leguminous plants. In New Zealand, U. polygonalis maorialis occurs on kōwhai trees (Sophora spp.) in both urban and natural settings. U. reversalis inhabits arid and semi-arid regions in southwestern North America, expanding into coastal and interior California.

Distribution

North America (southwestern United States, Mexico, expanding to California, Great Lakes, and Atlantic coast); New Zealand (native); Europe (Denmark, Norway, Sweden recorded); Israel (U. limbalis).

Seasonality

Uresiphita reversalis: multiple annually in southern regions ( as short as 5 weeks in summer), fewer in northern areas; typically as pupae. In Berkeley, California, two periods occur: March-May and July-October. U. polygonalis maorialis in Canterbury, New Zealand: with flight from late November to late February, peaking in late December.

Diet

Larvae feed primarily on legumes (Fabaceae). U. reversalis: native include Sophora, Lupinus, Baptisia; expanded to introduced Genista (French broom, G. monspessulana), plus Acacia, false indigo (Baptisia), and occasionally Crapemyrtle and honeysuckle. U. polygonalis maorialis: Sophora spp. (kōwhai), Lupinus arboreus.

Host Associations

Sophora secundiflora - native Texas Mountain Laurel; primary native for U. reversalis in southwestern North America
Genista monspessulana - introduced French broom; U. reversalis has expanded range to exploit this plant
Sophora microphylla - native kōwhai; preferred for U. polygonalis maorialis in New Zealand
Sophora tetraptera - native preferred for oviposition and feeding by U. polygonalis maorialis in Wellington
Lupinus arboreus - native tree lupine; for U. polygonalis maorialis
Lupinus - native -level association for U. reversalis
Baptisia - native false indigo; for U. reversalis
Acacia - for U. reversalis

Life Cycle

U. reversalis: laid in clusters averaging ~19 per clutch on leaf surfaces; five larval instars; in opaque white cocoon amid dense webbing; duration highly variable (5-25 weeks) depending on season and latitude; 4-5 annually possible in favorable conditions. U. polygonalis maorialis: in Canterbury, New Zealand.

Behavior

Larvae of U. reversalis feed gregariously in exposed daytime groups, contrary to the solitary habit of most caterpillars. They construct dense silken webbing on plants. are and easily startled from resting positions. Larvae sequester host plant alkaloids for chemical defense.

Ecological Role

Herbivore and defoliator of leguminous plants; U. polygonalis maorialis is the main defoliator of Sophora spp. in New Zealand. Larvae serve as for including Meteorus pulchricornis (Braconidae) and Pimpla/Coccygomimus sanguinipes (Ichneumonidae). U. reversalis has been considered for of broom (Genista).

Human Relevance

U. reversalis: potential biocontrol agent for broom plants; caterpillars known as "Sophora Worm" or "Genista Broom ." U. polygonalis maorialis: cultural significance in Māori tradition associated with kōwhai trees; not considered a significant agricultural pest. of U. polygonalis maorialis identified for monitoring purposes.

Similar Taxa

Pyralidae (sensu lato)Uresiphita was formerly classified in Pyralidae; some resources still list it there incorrectly. Currently placed in Crambidae, Pyraustinae.
Other Crambidae generaUresiphita larvae are distinguished by aposematic coloration and alkaloid ; by white body/legs with contrasting hindwing colors.