Ultrastructure and morphology of antennal sensilla of the adult diving beetle Cybister japonicus Sharp

The morphology and distribution of the antennal sensilla of adult diving beetle Cybister japonicus Sharp (Dytiscidae, Coleoptera), have been examined. Five types of sensilla on the antennae were identified by scanning electron microscope (SEM) and transmission electron microscope (TEM). Sensilla pla...

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Bibliographic Details
Published in:PloS one 2017-03, Vol.12 (3), p.e0174643-e0174643
Main Authors: Song, Li-Mei, Wang, Xue-Min, Huang, Jian-Ping, Zhu, Fang, Jiang, Xiang, Zhang, Shan-Gan, Ban, Li-Ping
Format: Article
Language:English
Subjects:
Animal sciences
Animals
Antennae
Antennal sensilla
Appendages (Animal anatomy)
Aquatic insects
Beetles
Biology and Life Sciences
Chemoreceptors
Chemoreceptors (internal)
Coleoptera
Coleoptera - anatomy & histology
Coleoptera - ultrastructure
Cybister japonicus
Dendrites
Dendrites - ultrastructure
Diving
Dytiscidae
Electron microscopes
Engineering and Technology
Female
Females
Flagella - ultrastructure
Insects
Male
Males
Medicine and Health Sciences
Microscopy, Electron, Scanning
Microscopy, Electron, Transmission
Morphology
Neurons - ultrastructure
Physiological aspects
Research and Analysis Methods
Scanning electron microscopy
Sensilla - anatomy & histology
Sensilla - ultrastructure
Sex Characteristics
Sex differences
Sheaths
Structure
Transmission electron microscopy
Zoology
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Summary:The morphology and distribution of the antennal sensilla of adult diving beetle Cybister japonicus Sharp (Dytiscidae, Coleoptera), have been examined. Five types of sensilla on the antennae were identified by scanning electron microscope (SEM) and transmission electron microscope (TEM). Sensilla placodea and elongated s. placodea are the most abundant types of sensilla, distributing only on the flagellum. Both these types of sensilla carry multiple pore systems with a typical function as chemoreceptors. Three types of s. coeloconica (Type I-III) were also identified, with the characterization of the pit-in-pit style, and carrying pegs externally different from each other. Our data indicated that both type I and type II of s. coleconica contain two bipolar neurons, while the type III of s. coleconica contains three dendrites in the peg. Two sensory dendrites in the former two sensilla are tightly embedded inside the dendrite sheath, with no space left for sensilla lymph. There are no specific morphological differences in the antennal sensilla observed between males and females, except that the males have longer antennae and more sensilla than the females.
ISSN:1932-6203
1932-6203
DOI:10.1371/journal.pone.0174643