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Home / Equine Research Bank / Parasitol Res / Ultrastructure of antennal sensory organs of horse nasal-myi...
Parasitology research2015; 114(7); 2527-2533; doi: 10.1007/s00436-015-4453-8

Ultrastructure of antennal sensory organs of horse nasal-myiasis fly, Rhinoestrus purpureus (Diptera: Oestridae).

Abstract: Rhinoestrus purpureus (Brauer, 1858) (Diptera: Oestridae) is an economically important parasite that can cause severe nasal myiasis in equids or even attacking humans. The antennae of R. purpureus were examined using stereoscopic microscopy and scanning electron microscopy. The general morphology was provided detailedly, together with distribution, type, size, and ultrastructure of antennal sensilla. All the three antennal segments, antennal scape, pedicel, and funiculus, are interspersed by microtrichiae. Only mechanoreceptors are detected on antennal scape and pedicel. On antennal funiculus, three types of sensilla were observed, including basiconic sensilla, coeloconic sensilla and clavate sensilla. Two features are characterized of this host-specific bot fly: (1) numerous sensory pits with branched basiconic sensilla on antennal funiculus and (2) the absence of trichoid sensilla. The function of these distinctive traits are discussed in association with the life history. We suggest that more sensory pits with branched sensilla could increase the sensitivity of olfactory system for host orientation, while the capability of pheromone identification might be reduced due to the absence of trichoid sensilla. Besides, we support both thermo- and chemo-functions of coeloconic sensilla.
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Publication Date: 2015-04-10 PubMed ID: 25859927DOI: 10.1007/s00436-015-4453-8Google Scholar: Lookup
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  • Non-U.S. Gov't

Summary

This research summary has been generated with artificial intelligence and may contain errors and omissions. Refer to the original study to confirm details provided. Submit correction.

This research investigates the sensory organs found in the antennae of the Rhinoestrus purpureus fly, a parasite causing nasal ailments in horses, providing detailed morphology and discussing their roles in the insect’s life cycle.

Antennal Examination of Rhinoestrus purpureus

  • The research paper provides a detailed study on the antennae of the R. purpureus fly, a well-known and economically damaging parasite known to cause severe nasal myiasis in horses and potentially humans.
  • Two types of microscopy were used in the study: stereoscopic microscopy and scanning electron microscopy, which offered researchers an in-depth view of the antennal structure.

Characteristics of Antennal Sensilla

  • All three parts of the antennae – scape, pedicel, and funiculus – were found to contain tiny hairs, or microtrichiae.
  • Mechanoreceptors, sensors that respond to mechanical pressure or distortion, were only found on the antennal scape and pedicel.
  • The funiculus, however, was found to have three distinct types of sensilla: basiconic, coeloconic, and clavate.
  • The sensory organs on the funiculus of the fly were identified as unique to this species, with two distinct characteristics: a large number of sensory pits with branched basiconic sensilla, and the absence of a specific type of sensory hair called trichoid sensilla.

Functional Implications of Antennal Structures

  • The study suggested that the increased number of sensory pits with branched sensilla could enhance the fly’s sensitivity to the olfactory system, thus benefitting its orientation capabilities towards hosts.
  • The notable absence of trichoid sensilla possibly indicates a reduced ability to identify pheromones, essentially chemical signals emitted by members of the same species.
  • The study also supports the idea that the coeloconic sensilla on the fly’s antennae may serve dual functions related to detecting temperature changes (thermo) and chemical changes (chemo).

Cite This Article

APA
Liu XH, Li XY, Li K, Zhang D. (2015). Ultrastructure of antennal sensory organs of horse nasal-myiasis fly, Rhinoestrus purpureus (Diptera: Oestridae). Parasitol Res, 114(7), 2527-2533. https://doi.org/10.1007/s00436-015-4453-8

Publication

Parasitology research
ISSN: 1432-1955
NlmUniqueID: 8703571
Country: Germany
Language: English
Volume: 114
Issue: 7
Pages: 2527-2533

Researcher Affiliations

Liu, X H
  • Key Laboratory of Non-Invasive Research Technology for Endangered Species, School of Nature Conservation, Beijing Forestry University, Beijing, China.
Li, X Y
    Li, K
      Zhang, D

        MeSH Terms

        • Animals
        • Diptera / physiology
        • Diptera / ultrastructure
        • Horse Diseases / parasitology
        • Horses
        • Host Specificity
        • Mechanoreceptors / ultrastructure
        • Microscopy, Electron, Scanning
        • Myiasis / parasitology
        • Myiasis / veterinary
        • Nose / parasitology
        • Phenotype
        • Sensilla / ultrastructure
        • Social Behavior

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        Citations

        This article has been cited 8 times.
        1. Xu W, Li X, Wang Q, Zhang C, Yang M, Zhou T, Li K, Zhang D. Insights into the Antennal Characteristics and Olfactory Strategy of the Endangered Rhino Stomach Bot Fly Gyrostigma rhinocerontis (Diptera: Oestridae). Insects 2022 Sep 29;13(10).
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        2. Xu W, Liu G, Wang Q, Yan L, Liu X, Li X, Pape T, Zhang D. Ultrastructure of Antennal Sensory Organs in Nine Flesh Flies (Diptera: Sarcophagidae): New Insight into the Definition of Family Sarcophagidae. Insects 2022 Jun 30;13(7).
          doi: 10.3390/insects13070602pubmed: 35886778google scholar: lookup
        3. Dong WY, Wang B, Wang GR. Morphological and Ultrastructural Characterization of Antennal Sensilla and the Detection of Floral Scent Volatiles in Eupeodes corollae (Diptera: Syrphidae). Front Neuroanat 2021;15:791900.
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        5. Zhang D, Li X, Liu X, Wang Q, Pape T. The antenna of horse stomach bot flies: morphology and phylogenetic implications (Oestridae, Gasterophilinae: Gasterophilus Leach). Sci Rep 2016 Oct 5;6:34409.
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        6. Wang QK, Yang YZ, Li XY, Li K, Zhang D. Comparative ultrastructure of pretarsi in five calyptrate species. Parasitol Res 2016 Jun;115(6):2213-22.
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        7. Li XY, Liu XH, Ge YQ, Zhang D. Scanning electron microscopy of antennal sensory organs of the cattle grub, Hypoderma lineatum (Diptera: Oestridae). Parasitol Res 2015 Oct;114(10):3865-71.
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