Antennal sensilla of Rhodnius

Abstract

By scanning electron microscopy, sensilla type and distribution were studied on the antennae of ten species of Rhodnius. No sexual dimorphism was apparent. Intraspecific differences in sensillar pattern were shown to be potentially useful in species determination and to agree with results from biochemical studies and previous morphometric studies in terms of species affinities. © 1994 Wiley-Liss, Inc.

Morphobiological aspects of Rhodnius brethesi Matta, 1919 (Hemiptera:Reduviidae) from the Upper and Middle Negro River, Amazon region of Brazil: I - scanning electron microscopy

“…According to Catalá and Schofield (1994), the cuticle of the four antennae segments of Rhodnius is covered with sensilla that have the function of mechanical, chemical and thermal receptors. The trichobotria (the sensilla functioning as mechanical receptors) have taxonomic value among triatomines, and were found only on the second segment of the antennae in R. brethesi (Lent & Wygodzinsky 1979).…”

“…In this first analysis using adult specimens, the presence of some structures already described in the literature for other species of triatomines has been confirmed, and some other, previously unreported structures have been described. These may have taxonomic value, in accordance with the continuation of the comparative study.Observations on the presence of bristles between the ommatidia in the genera Alberprozenia, Belminus, Microtriatoma, Cavernicola, Rhodnius, Psammolestes, Dipetalogaster, Eratyrus, Panstrongylus, Paratriatoma, and Triatoma, by means of scanning electron microscopy, were made by Galíndez Girón et al (1994), thus providing confirmation for the results obtained in the present study for the genus Rhodnius.According to Catalá and Schofield (1994), the cuticle of the four antennae segments of Rhodnius is covered with sensilla that have the function of mechanical, chemical and thermal receptors. The trichobotria (the sensilla functioning as mechanical receptors) have taxonomic value among triatomines, and were found only on the second segment of the antennae in R. brethesi (Lent & Wygodzinsky 1979).…”

“…Scanning electron microscopy of R. brethesi • Jacenir Reis dos Santos-Mallet et al However, Catalá and Schofield (1994) wrote that, in adult specimens of the genus Rhodnius, the total number of trichobotria varied between five and nine, and that this number could between species, between individuals of the same species and occasionally between the left and right antennae of the same individual. Detailed studies (Andrade et al 2002) on the principal sensilla found on the antennae of R. brethesi (bristle types I, II, and III) are being conducted with the aim of elucidating their taxonomic value, and also to evaluate the receptor pattern in relation to habitat adaptations.…”

Behavioural responses to human skin extracts and antennal phenotypes of sylvatic first filial generation and long rearing laboratory colony Rhodnius prolixus

“…1) (Catalá & Schofield 1994, Catalá 1997, Gracco & Catalá 2000, Carbajal de la Fuente & Catalá 2002, Catalá et al 2004, Esteban et al 2005, Villela et al 2005.…”

Variación del fenotipo antenal de poblaciones del domicilio, peridomicilio y silvestres de Triatoma dimidiata (Hemiptera: Reduviidae) en Santander, Colombia

“…Por otra parte, el aumento de los BR en hembras del peridomicilio podría relacionarse con la alta densidad de insectos observada en campo, ya que estas sensilias han mostrado ser susceptibles a la densidad poblacional (23), perciben estímulos mecánicos relacionados con el micro hábitat (18) y se han asociado con la selección del hábitat más que con la del huésped (20).…”