Javiera Rocca

Pontificia Universidad Católica de Valparaíso | PUCV · Institute of Biology

teratological case of unilateral abdominal atrophy is described on a third instar nymph of Loxa deducta Walker. A second case of binary unilateral schistomely in an adult is also described. The specimen comes from provinces of Buenos Aires and Entre Ríos, Argentina. The cases are the first teratosis known for Loxa deducta. Illustrations are provide...

The recent report of the western conifer seed bug Leptoglossus occidentalis in Chile is commented. It rapid expansion in the Chilean territory is analyzed, and the first sightings of this species in the Atacama, Metropolitan, Maule and Bío Bío Regions are reported. Potential impacts; as well as the need for a rapid action, in order to control the b...

The first detection of the western conifer seed bug Leptoglossus occidentalis Heidemann, 1910 (Heteroptera: Coreidae: Coreinae) in Chile is provided. Specimens were recorded in Valparaíso city, Valparaíso Region, Chile. As some specimens were identified from a ship in Coquimbo Region in Chile (contiguous to Valparaíso) in the previous month to this...

Oncopeltus Stål is a lygaeine genus currently comprising 39 species classified in two subgenera (Slater & O’Donnell, 1995). Oncopeltus is distributed in both hemispheres in tropical and temperate areas. Species on this genus are commonly known as milkweed bugs, because of their trophic association with plants in the family Apocynaceae (Scudder & Du...

Observations of the interaction between the Chilean milkweed bug Oncopeltus (Erythrischius) miles (Blanchard, 1852) (Heteroptera: Lygaeidae) and three spider species: Steatoda grossa (C.L. Koch, 1838) (Theriididae), Argiope argentata (Fabricius, 1775) (Araneidae) and Frigga crocuta (Taczanowski, 1878) (Salticidae) are reported. In no case the spide...

The presence of the introduced stink bug Loxa deducta Walker, 1867 in Chile is analyzed. New records are provided for the Valparaíso, O´Higgins and Maule regions, extending its distribution southwards and northwards. Identification tips are provided to differentiate it from other Chilean pentatomids, as well as Loxa Amyot & Serville, 1843 species i...

After the first interceptions of Leptoglossus occidentalis in Chile, the first also in the southern hemisphere, a year later new collecting confirms the establishment of this species in the country. The records are from diverse localities and regions in the country, including places far away from the coastal areas, where it initially was observed....

Resumen. Se describen cuatro casos teratológicos correspondientes a atrofias y oligomerias antenales en heterópteros peruanos: atrofia en antena izquierda de Piezogaster obscuratus (Montandon, 1899) (Coreidae) y Oncopeltus (Erythrischius) zonatus (Erichson, 1848) (Lygaeidae), atrofia en antena derecha con anartrogénesis de Oncopeltus (Erythrischius...

Leptoglossus concaviusculus Berg, 1892 is a leaf-footed bug distributed in Argentina, Brazil, Paraguay, and Uruguay. In this contribution, two teratological cases in L. concaviusculus are described. The first one is a simple oligomery in a male specimen, and the second belongs to a case of atrophy on a female specimen. Possible causes of the terato...

Resumen Se describen tres casos teratológicos en ejemplares de Lygaeidae de Chile. El primer caso corresponde a una hemiteria pronotal en Syzygitis poecilus (Spinola, 1852); el segundo caso corresponde a una oligomeria simple en la antena derecha de un ejemplar de S. poecilus; finalmente el tercer caso corresponde a una atrofia con anartrogénesis e...

First observations of O. miles interacting with spider predators

A teratological case in the Chilean milkweed bug Oncopeltus (Erythrischius) miles (Blanchard, 1852) (Heteroptera: Lygaeidae) is described. The teratosis belongs to a unilateral oligomery in the right antenna. It is believed that this teratosis is the result of the missing of the last antennomere in an early instar. The distribution of the species i...