Immature stages of Chinavia musiva Berg, 1878 a unique pattern in the morphology of Chinavia Orian, 1965 Hemiptera, Pentatomidae
Matesco, V.C.; Schwertner, C.F.; Grazia, J.
Journal of Natural History 42.25-26: 1749-1763
ISSN/ISBN: 0022-2933 DOI: 10.1080/00222930802124297
Specimens of Chinavia musiva were collected in Parque Estadual do Espinilho (Barra do Quarai County, RS, Brazil). Insects were reared under controlled conditions (24 plus or minus 1deg. C; RII 70 plus or minus 10%; 12h L:12h D), and fed on green beans (Phaseolus vulgaris L.). Eggs of C. musiva differ from the pattern observed in other species of the genus due to chorion colour and surface, and aero-micropylar processes, number and shape. Exclusive features of the species in the nymphal stage are head and thorax dull; variegated pattern of abdomen, and openings of the scent glands in conspicuous tubercles. Developmental time was, on average, 52 days; females laid more frequently egg masses with 14 or 42 eggs. Females collected from the field as nymphs exhibited higher reproductive performance than females reared on green beans as nymphs and adults, suggesting that wild hosts could be essential for the species life cycle.