Estudos anatômicos e histológicos sôbre a subfamília Triatominae (Heteroptera, reduviidae): XIX parte: estudo comparado das mandíbulas de vários Triatominae e outros Reduviidae

Abstract

Descreve-se, nesta publicação, as mandíbulas de 8 espécies de Triatominae e de 8 de outros Heteroptera, do grupo dos predadores, focalizando a forma e a armação da parte apical. Os caracteres permitem diferenciar entre um tipo hematófago e um predador. Nos hematófagos conseguimos diferenciar os 3 gêneros estudados pela forma e armação das mandíbulas; não é possível, porém, a classificação das espécies pelas mandíbulas, porque as diferenças, sendo mesmo específicas, não são suficientemente significativas. Forma e armação dos estiletes dos dois tipos estão relacionadas, diretamente, com os costumes dos animais no ato de alimentação.

Description of the cave organ in three species of the genus Belminus (Hemiptera: Reduviidae: Triatominae) by optical and scanning electron microscopy

“…This sensory structure was observed only in adults of both sexes in the three species of the genus Belminus; there was no apparent sexual dimorphism. The cave organ is located in the external lateral region, near the distal trichobothria, as reported for other Reduviidae (Barth 1952, Catalá 1994, Catalá et al 1998, Weirauch 2003. Under OM, the cave organ shows three clearly differentiated areas: the opening, the tunnel and the main cavity (Fig.…”

“…The opening structures were 7.4-14.8 µm in width for the species of Belminus (Table II), similar but less variable than the widths reported for the genera Rhodnius (6-20 µm) and Triatoma (3-20 µm) (Catalá 1994). The function of the cave organ remains controversial; Barth (1952) proposes that it is an infrared receptor. Other electrophysiological studies in T. infestans support this hypothesis (Lazzari & Wicklein 1994).…”

“…106(6): 769-772, September 2011 The cave organ was originally described in the pedicel of the antenna of Triatoma infestans by Barth (1952) but under the name of cova das cerdas because of the presence of numerous digitiform prolongations covering the internal surface (Catalá et al 1998). This organ was defined by Barth (1952) as a cuticular invagination formed by a closed ellipsoidal cavity in the pedicel, with a thin connecting channel open at the invagination.…”

“…106(6): 769-772, September 2011 The cave organ was originally described in the pedicel of the antenna of Triatoma infestans by Barth (1952) but under the name of cova das cerdas because of the presence of numerous digitiform prolongations covering the internal surface (Catalá et al 1998). This organ was defined by Barth (1952) as a cuticular invagination formed by a closed ellipsoidal cavity in the pedicel, with a thin connecting channel open at the invagination. Among the Triatominae, descriptions of this structure have been reported for 18 species of the genera Triatoma Laporte, 1832, Rhodnius Stål, 1859, Panstrongylus Berg, 1879, and Eratyrus Stål, 1859 (Barth 1952, Catalá 1994, Catalá et al 1998, Weirauch 2003, but no description has been published for the genus Dipetalogaster Usinger, 1939 (Weirauch 2003).…”

“…This organ was defined by Barth (1952) as a cuticular invagination formed by a closed ellipsoidal cavity in the pedicel, with a thin connecting channel open at the invagination. Among the Triatominae, descriptions of this structure have been reported for 18 species of the genera Triatoma Laporte, 1832, Rhodnius Stål, 1859, Panstrongylus Berg, 1879, and Eratyrus Stål, 1859 (Barth 1952, Catalá 1994, Catalá et al 1998, Weirauch 2003, but no description has been published for the genus Dipetalogaster Usinger, 1939 (Weirauch 2003). In other subfamilies of Reduviidae, such as Peiratinae, Reduviinae and Stenopodainae, the description of the cave organ has been reported by Weirauch (2003) and this structure is becoming a structure of value in the study of phylogenetic systematics of Reduviidae.…”