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Morphology of antennae of Dendroctonus vitei (Coleoptera: Curculionidae: Scolytinae), with special reference to sensilla clustered into pit craters

Published online by Cambridge University Press:  01 June 2018

María Fernanda López ,
Francisco Armendáriz-Toledano ,
Arnulfo Albores-Medina  and
Gerardo Zúñiga
María Fernanda López
Affiliation:
Laboratorio de Variación Biológica y Evolución, Departamento de Zoología. Escuela Nacional de Ciencias Biológicas-Instituto Politécnico Nacional, Prolongación de Carpio y Plan de Ayala s/n, Col. Santo Tomás, México D.F., CP 11340, Ciudad de México, Mexico
Francisco Armendáriz-Toledano
Affiliation:
Laboratorio de Variación Biológica y Evolución, Departamento de Zoología. Escuela Nacional de Ciencias Biológicas-Instituto Politécnico Nacional, Prolongación de Carpio y Plan de Ayala s/n, Col. Santo Tomás, México D.F., CP 11340, Ciudad de México, Mexico
Arnulfo Albores-Medina
Affiliation:
Departamento de Toxicología, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Av. Instituto Politécnico Nacional 2508, San Pedro Zacatenco, Gustavo A. Madero, 07360, Ciudad de México, Mexico
Gerardo Zúñiga*
Affiliation:
Laboratorio de Variación Biológica y Evolución, Departamento de Zoología. Escuela Nacional de Ciencias Biológicas-Instituto Politécnico Nacional, Prolongación de Carpio y Plan de Ayala s/n, Col. Santo Tomás, México D.F., CP 11340, Ciudad de México, Mexico
*
1Corresponding author: (e-mail: [email protected] or [email protected])
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Abstract

As reported recently by the authors, the third and fourth antennomeres of the antennal club of the bark beetle Dendroctonus vitei Wood (Coleoptera: Curculionidae: Scolytinae) possess conoid sensilla clustered inside spherical or bulb-shaped invaginations of the cuticle that resemble geological pit craters. These structures are novel relative to other Dendroctonus Erichson species examined. The morphology and ultrastructure of different sensilla types on the antennal club and within the pit craters of D. vitei are herein described in detail with the aid of light, environmental scanning electron, and transmission electron microscopy. Five types of sensilla were found: fluted, basiconica type I, and trichodea types I, II, and III. The pit craters were composed of clusters of multiporous sensilla basiconica arising from the inner surface of the concavities, and the morphology and ultrasructure of these sensilla are consistent with an olfactory function. The presence of pit craters in the D. vitei on the anterior side of the antennal club is an diagnostic character for this species and an autapomorphy of great taxonomic importance within the Dendroctonus frontalis Zimmermann species complex.

Type
Systematics & Morphology
Information
The Canadian Entomologist , Volume 150 , Issue 4 , August 2018 , pp. 471 - 480
Copyright
© Entomological Society of Canada 2018 

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Footnotes

Subject editor: Barbara Bentz

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