Abstract
Scutelleridae occur worldwide, and immature stages have been scarcely studied. Galeacius Distant is a Neotropical genus currently containing four species. Here the external morphology of immatures of Galeacius martini Schouteden is described. Adults and nymphs were maintained in laboratory and fed on branches of Miconia sellowiana with fruits. The egg of G. martini is semi-spherical, reddish brown, with reticulations surrounding smaller granulated sculpturing under scanning electron microscopy (S.E.M). The nymphs from first to fifth instar have a stridulitrum plus plectrum, and 2+2 trichobothria posterior to spiracles on abdominal sternites III–VII. The dorso-abdominal scent efferent system has an evaporatorium with two distinct mycoid sculpturing, and their are two types of peritreme on medial plates II and III in first and fifth instar. The color and chorion morphology may distinguish G. martini from other scutellerid eggs so far described. New descriptions of immatures of Scutelleridae are particularly desirable, mainly with emphasis some structures on S.E.M., as stridulatory devices, dorso-abdominal scent efferent system, and trichobothria, thus improving the knowledge about the taxon.References
Bianchi, F.M., Matesco, V.C., Campos, L.A. & Grazia, J. (2011) External morphology of the egg and the first and fifth instars of Cyrtocoris egeris Packauskas & Schaefer (Hemiptera; Heteroptera; Pentatomidae; Cyrtocorinae). Zootaxa, 2991, 29–34.
Campos, L.A., Grazia, J., Garbelotto, T.A., Bianchi, F.M. & Lanzarini, N.C. (2010) A new South American species of Banasa Stål (Hemiptera: Heteroptera: Pentatomidae: Pentatominae): from egg to adult. Zootaxa, 2559, 47–57.
Candan, S. & Sludere, Z. (2006) Studies on the external morphology of the eggs of Eurygaster Maura (Linnaeus, 1758) (Heteroptera: Scutelleridae). Polish Journal of Entomology, 75, 369–374.
Candan, S., Sludere, Z. & Erbey, M. (2007) Morphology of eggs and spermatheca of Odontotarsus purpureolineatus (Heteroptera, Scutelleridae). Biologia, Bratislava, 62 (6), 763–769.
Candan, S., Suludere, Z. & Kiyak, S. (2001) External morphology of eggs of Codophila varia (Fabricius, 1787) (Heteroptera: Pentatomidae). Journal of the Entomological Research Society, 3, 33–39.
Cassis, G. & Vanags, L. (2006) Jewel bugs of Australia (Insecta, Heteroptera, Scutelleridae) In: Rabisch, W. (Ed), Hug the bug – For love of true bugs. Festschrift zum 70. Geburtstag von Ernst Heiss. Denisia, 19, 275–398.
Chapman, R.F. 1998. The insects. Structure and Function. The press syndicate of University of Cambridge, Cambridge, 770p.
Cobben, R.H. (1968). Evolutionary Trends in Heteroptera. Part I. Eggs, Architecture of the Shell, Gross Embrylology, and Eclosion. Centre for Agricultural Publishing and Documentation, Wageningen, 475pp.
Davidová-Vilímová, J. & Podoubsky, M. (1999) Larval and adult dorso-abdominal scent glands and androconia of central European Pentatomoidea (Heteroptera). Acta Societatis Zoologicae Bohemicae, 63, 37–69.
Distant, W.L. (1889) Insecta: Rhynchota: Hemiptera-Heteroptera. Biologia Centrali Americana. p. 316, pl.29, f.24.
Grazia, J. & Frey-Da-Silva, A. (2001) Descrição dos imaturos de Loxa deducta Walker e Pallantia macunaima Grazia (Heteroptera: Pentatomidae) em ligustro, Ligustrum lucidum Ait. Neotropical Entomology, 30, 73–80.
Grazia, J., Schuh, R.T. & Wheeler, W.C. (2008) Phylogenetic relationships of family groups in Pentatomoidea based on morphology and DNA sequences (Insecta: Heteroptera). Cladistics, 24, 1–45.
Huseey, R.F. (1934) Observations on Pachycoris torridus (Scop.) with remarks on parental care in other Hemiptera. Bulletin of the Brooklyn Entomological Society, 29, 133–145.
Javahery, M. (1994) Development of eggs in some true bugs (Hemiptera-Heteroptera). Part I. Pentatomoidea. The Canadian Entomologist, 126, 401–433.
Kment, P. & Vilímová, J. (2010a) Thoracic scent efferent system of Pentatomoidea (Hemiptera: Heteroptera): a review of terminology. Zootaxa, 2706, 1–77.
Kment, P. & Vilímová, J. (2010b) Thoracic scent efferent system of the Tessaratomidae sensu lato (Hemiptera: Heteroptera: Pentatomoidea) with reference to the phylogeny of the family. Zootaxa, 2363, 1–59.
Matesco, V.C., Schwertner, C.F. & Grazia, J. (2007) Descrição dos estágios imaturos e biologia de Chinavia pengue (Rolston) (Hemiptera: Pentatomidae). Revista Brasileira de Entomologia, 51, 93–100.
Matesco, V.C., Fürstenau, B.B.R.J., Bernardes, J.L.C., Schwertner, C.F. & Grazia, J. (2009a). Morphological features of the eggs of Pentatomidae (Hemiptera: Heteroptera). Zootaxa, 1984, 1–30.
Matesco, V.C., Schwertner, C.F. & Grazia, J. (2009b) Morphology of the immatures and biology of Chinavia longicorialis (Breddin) (Hemiptera: Pentatomidae). Neotropical Entomology, 38, 74–82.
Mendonça Jr, M.S., Schwertner, C.F. & Grazia, J. (2009) Diversity of Pentatomoidea (Hemiptera) in riparian forests of southern Brazil: taller forests, more bugs. Revista Brasileira de Entomologia, 53, 121–127.
Miller, N.C.E. (1934) The development stages of some Malayan Rhynchota. Journal of the Federated Malay States Museums, 17, 502–525.
Peredo, L.C. (2002) Description, biology, and maternal care of Pachycoris klugii (Heteroptera: Scutelleridae). Florida Entomologyst, 85(3), 464–473.
Peredo, L.C. (2004) Dystus puberulus Stål (Heteroptera: Scutelleridae) a shield bug associated with figs in Mexico. Florida Entomologist, 87(4), 528–532.
Santos, J.C., Silveira, F.A.O., Almeida, F.V.M. & Fernandes W.G. (2005) Ecology and behavior of Pachycoris torridus (Hemiptera: Scutelleridae): new host plant, color polymorphism, maternal care and parasitism. Lundiana 6(2), 107–111.
Schaefer, C.W. (1966) Some notes on heteropteran trichobothria. The Michigan Entomologist, 1, 85–90.
Schaefer, C.W. (1975) Heteropteran trichobothria (Hemiptera: Heteroptera). International Journal of Insect Morphology & Embryology, 4, 193–264.
Schuh, R.T. & Slater, J.A. (1995). True bugs of the world (Hemiptera: Heteroptera). Classification and natural history. Cornell University Press, Ithaca, NY. 416 pp.
Schwertner, C.F., Albuquerque, G.S. & Grazia, J. (2002) Descrição dos estágios imaturos de Acrosternum (Chinavia) ubicum Rolston (Heteroptera: Pentatomidae) e efeito do alimento no tamanho e coloração das ninfas. Neotropical Entomology. 31, 571–579.
Southwood, T.R.E. (1956) The structure of the eggs of the terrestrial Heteroptera and its relationship to the classification of the group. Transactions of the Royal Entomological Society of London, 108, 163–221.
Walt, J.F. & McPherson, J.E. (1973) Description of immature stages of Stethaulax marmorata (Hemiptera: Scutelleridae) with notes on its life history. Annals of the Entomological Society of America, 66(5), 1103–1107.
Williams III, L., Coscarón, M.C., Dellapé, P.M. & Roane, T.M. (2005) The shield-backed bug, Pachycoris stallii: Description of immature stages, effect of maternal care on nymphs, and notes on life history. Journal of Insect Science 5(29), 1–13.
Williams III, L., Evans, P.E. & Bowers, W.S. (2001) Defensive chemistry of an aposematic bug, Pachycoris stallii Uhlerand volatile compounds of its host plant Croton californicus Muell.-Arg. Journal of Chemical Ecology 27, 203–216.
Wolf, K.W., Reid, W. & Rider, D.A. (2002) Eggs of the stink bug Acrosternum (Chinavia) marginatum (Hemiptera: Pentatomidae): a scanning electron microscopy study. Journal of Submicroscopic Cytology and Pathology, 34, 143–149.