The shield-backed bug, <i>Pachycoris stallii</i>: Description of immature stages, effect of maternal care on nymphs, and notes on life history

The life history of the shield-backed bug, Pachycoris stallii Uhler (Heteroptera: Scutelleridae), immatures was studied on its host plant, Croton californicus Muell.-Arg. (Euphorbiaceae), in Baja California Sur, Mexico. Immature stages are described and illustrated. Pachycoris stallii is bi- or mult...

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Detalles Bibliográficos
Autores principales: Williams, Livy, Coscarón, María del Carmen, Dellapé, Pablo Matías, Roane, Timberley M.
Formato: Articulo
Lenguaje:Inglés
Publicado: 2005
Materias:
Ciencias Naturales
Pentatomoidea
insect eggs
subsocial behavior
maternal guarding
embryonic orientation
aggregation
Croton californicus
Euphorbiaceae
Telenomus pachycoris
Hymenoptera
Scelionidae
Dorymyrmex bicolor
Formicidae
Baja California Sur
México
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/124273
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-124273
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Naturales
Pentatomoidea
insect eggs
subsocial behavior
maternal guarding
embryonic orientation
aggregation
Croton californicus
Euphorbiaceae
Telenomus pachycoris
Hymenoptera
Scelionidae
Dorymyrmex bicolor
Formicidae
Baja California Sur
México
spellingShingle Ciencias Naturales
Pentatomoidea
insect eggs
subsocial behavior
maternal guarding
embryonic orientation
aggregation
Croton californicus
Euphorbiaceae
Telenomus pachycoris
Hymenoptera
Scelionidae
Dorymyrmex bicolor
Formicidae
Baja California Sur
México
Williams, Livy
Coscarón, María del Carmen
Dellapé, Pablo Matías
Roane, Timberley M.
The shield-backed bug, <i>Pachycoris stallii</i>: Description of immature stages, effect of maternal care on nymphs, and notes on life history
topic_facet Ciencias Naturales
Pentatomoidea
insect eggs
subsocial behavior
maternal guarding
embryonic orientation
aggregation
Croton californicus
Euphorbiaceae
Telenomus pachycoris
Hymenoptera
Scelionidae
Dorymyrmex bicolor
Formicidae
Baja California Sur
México
description The life history of the shield-backed bug, Pachycoris stallii Uhler (Heteroptera: Scutelleridae), immatures was studied on its host plant, Croton californicus Muell.-Arg. (Euphorbiaceae), in Baja California Sur, Mexico. Immature stages are described and illustrated. Pachycoris stallii is bi- or multivoltine and occurs in xeric areas with sandy soil where it is rarely encountered away from C. californicus. Nymphs and adults feed on seeds within C. californicus fruit. Bugs oviposit on the underside of leaves, and females guard their eggs and first-instar nymphs from natural enemies. Embryonic orientation of prolarvae is nonrandom; each embryo is oriented with its venter directed toward the ground. This orientation may facilitate aggregation of first instars. The longitudinal axes of eggs are always oriented upward at about a 16° angle of deviation from a line perpendicular to the leaf surface. This is the first recorded observation of this phenomenon in Pentatomoidea. Experimental removal of females guarding first instars results in 100% loss of nymphs, and this is attributed to disruption of the aggregative behavior of nymphs. Maternal guarding appears to be a net benefit to P. stallii, despite possible costs to the brooding female.
format Articulo
Articulo
author Williams, Livy
Coscarón, María del Carmen
Dellapé, Pablo Matías
Roane, Timberley M.
author_facet Williams, Livy
Coscarón, María del Carmen
Dellapé, Pablo Matías
Roane, Timberley M.
author_sort Williams, Livy
title The shield-backed bug, <i>Pachycoris stallii</i>: Description of immature stages, effect of maternal care on nymphs, and notes on life history
title_short The shield-backed bug, <i>Pachycoris stallii</i>: Description of immature stages, effect of maternal care on nymphs, and notes on life history
title_full The shield-backed bug, <i>Pachycoris stallii</i>: Description of immature stages, effect of maternal care on nymphs, and notes on life history
title_fullStr The shield-backed bug, <i>Pachycoris stallii</i>: Description of immature stages, effect of maternal care on nymphs, and notes on life history
title_full_unstemmed The shield-backed bug, <i>Pachycoris stallii</i>: Description of immature stages, effect of maternal care on nymphs, and notes on life history
title_sort shield-backed bug, <i>pachycoris stallii</i>: description of immature stages, effect of maternal care on nymphs, and notes on life history
publishDate 2005
url http://sedici.unlp.edu.ar/handle/10915/124273
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