Helocassis clavata (Fabricius, 1798)
Cassida clavata Fabricius, 1798: 83 (HT in ZMK), 1801: 398; Herbst, 1799: 311; Olivier, 1808: 963 (incl. fig.); Schönherr, 1817: 221.
Aspidimorpha clavata: Hope, 1840 b: 90.
Coptocycla clavata Boheman, 1855: 391, 1856: 189, 1862: 461; Crotch, 1873: 79; Gemminger and Harold, 1876: 3668; Champion, 1894: 206.
Metriona clavata: Weise, 1896 b: 14.
Metriona (s. str.) clavata: Spaeth, 1914 g: 138.
Deloyala clavata: Barber, 1916: 124.
Plagiometriona (Parametriona) clavata: Spaeth, 1937 b: 145; Riley, 1986: 104.
Plagiometriona clavata: Blackwelder, 1946: 750; Balsbaugh and Hays, 1972: 196; Wilcox, 1975: 158; Woodruff, 1975: 1 (incl. fig., larva); Riley and Enns, 1979: 81; Lawson, 1991: 574 (larva); Maes and Staines, 1991: 49; Buzzi, 1994: 209 (host plant); Borowiec, 1996 a: 217; Mohamedsaid, 2000 b: 377.
Helocassis clavata: Borowiec, 1999 d: 375.
Host plant: Solanaceae: Physalis cornuta, Solanum dulcamara, S. nigrum (Barber, 1916); Solanum gracile (Woodroof, 1975); Solanum americanum, S. carolinense, Physalis longifolia, Ph. heterophylla, Datura stramonium, Solanum tuberosa (Riley and Enns, 1979); Datura stramonium (Barrows, 1979).
Distr.: America boreali. Costa Rica: Cartago; Mexico: Acapulco, Guanajuato, Guerrero, Hidalgo, Izucar, Matamoros, Morelos, San Luis Potosi, Solola; USA: Kansas, Kentucky, Louisiana, Maryland, Massachusetts, Michigan, Missouri, Nebraska, New Jersey, New Mexico, Tenessee, Texas.
figure: habitus in colour
figure: life specimen
next species: crucipennis