Heteroptera

Distribution of constitutive heterochromatin in Pachycoris torridus (Hemiptera, Scutelleridae) with different chromatic patterns

T. S. Souza-Firmino, Alevi, K. C. C., Pereira, L. L. V., Souza, E. R. S., Júnior, F. C. S., Banho, C. A., Carmo, G. O., and Itoyama, M. M., Distribution of constitutive heterochromatin in Pachycoris torridus (Hemiptera, Scutelleridae) with different chromatic patterns, vol. 14, pp. 15749-15753, 2015.

The stink bug Pachycoris torridus is a pest of great agricultural importance due to its records on culture of physic nut (Jatropha curcas), which is the raw material for biodiesel production. An interesting feature of this insect is its high phenotypic variability, a characteristic that resulted in it being classified as a new species on eight separate occasions. In the suborder Heteroptera, the heterochromatin pattern is specific and often allows species to be differentiated. To confirm whether there is differentiation between specimens of P.

Meiotic behavior and karyotypic variation in Acledra (Pentatomidae, Heteroptera)

P. J. Rebagliati and Mola, L. M., Meiotic behavior and karyotypic variation in Acledra (Pentatomidae, Heteroptera), vol. 9, pp. 739-749, 2010.

Acledra comprises 15 taxonomically identified species, most of which are crop pests. This is the first cytogenetic study of species of this genus. Acledra kinbergii and A. modesta showed the modal number of the Pentatomidae (2n = 14 = 12 + XY), while A. bonariensis had a reduced complement (2n = 12 = 10 + XY), with a markedly larger autosomal pair.

Pattern of silver nitrate-staining during meiosis and spermiogenesis in testicular lobes of Antiteuchus tripterus (Heteroptera: Pentatomidae)

H. V. Souza, Castanhole, M. M. U., Bicudo, H. E. M. C., and Itoyama, M. M., Pattern of silver nitrate-staining during meiosis and spermiogenesis in testicular lobes of Antiteuchus tripterus (Heteroptera: Pentatomidae), vol. 7, pp. 196-206, 2008.

The pattern of silver nitrate (Ag)-staining differed among testicular lobes of Antiteuchus tripterus. In general, these differences are in regard to the number, size, shape, coloring intensity, and location of the stained bodies or masses, observed during meiosis and spermiogenesis. These characteristics were similar in lobes 1-3. Lobes 4-6, however, differed from each other and from lobes 1-3 as well.

Localization of rDNA sites in holocentric chromosomes of three species of triatomines (Heteroptera, Triatominae)

G. Dias de Ca Severi-Aguiar and de Azeredo-Oliveira, M. Tercília, Localization of rDNA sites in holocentric chromosomes of three species of triatomines (Heteroptera, Triatominae), vol. 4, pp. 704-709, 2005.

Chromatin organization in the holocentric chromosomes of three triatomines species was cytologically studied by fluorescent in situ hybridization with a 45S rDNA probe of Drosophila melanogaster to localize ribosomal genes. In Triatoma tibiamaculata, metaphases I showed telomeric highlights in a single, larger bivalent. In T. protacta, hybridization was detected in one of the telomeres of an autosomal chromosome. In T. platensis, there were highlights in a single, smaller chromosome (X chromosome).

Study of chromosomal and nucleolar aspects in testes of Nysius californicus (Heteroptera: Lygaeidae)

H. V. Souza, Bicudo, H. E. M. C., and Itoyama, M. M., Study of chromosomal and nucleolar aspects in testes of Nysius californicus (Heteroptera: Lygaeidae), vol. 6, pp. 33-40, 2007.

In Nysius californicus (family Lygaeidae, subfamily Orsillinae), a pest commonly known as the seed bug, the chromosome complement is 2n = 16 (12A + 2m + XY), testes are formed by seven seminiferous tubules covered by an orange-colored membrane, and spermatogenesis is cystic. At prophase, sex chromosomes are heteropycnotic and autosomes usually show a chiasma. At metaphase, sex chromosomes along with microchromosomes may be seen located at the center of a ring formed by the remaining autosomes. A characteristic specific of N.

Acid phosphatase activity distribution in salivary glands of triatomines (Heteroptera, Reduviidae, Triatominae)

A. C. B. Anhê, Lima-Oliveira, A. P. M., and Azeredo-Oliveira, M. T. V., Acid phosphatase activity distribution in salivary glands of triatomines (Heteroptera, Reduviidae, Triatominae), vol. 6, pp. 197-205, 2007.

Acid phosphatase activity (Gömori technique) in salivary gland cells was investigated in adult insects (males and females) of four species of triatomines: Triatoma infestans, Panstrongylus megistus, Rhodnius neglectus, and Rhodnius prolixus. Binucleated cells with bulky and polyploidy nuclei were detected, with acid phosphatase activity in the heterochromatin and nucleolus, which showed the most intense response.

Subscribe to Heteroptera