THE SENSORY NERVOUS SYSTEM OF THE ADULT CATTLE TICK <i>BOOPHILUS MICROPLUS</i> (CANESTRINI) IXODIDAE. PART I. LIGHT MICROSCOPY

Waladde, S. M.

doi:10.1111/j.1440-6055.1976.tb01720.x

Cited by 16 publications

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References 20 publications

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“…Although the cheliceral papilla was considered previously to be a putative chemoreceptor (Waladde 1976(Waladde , 1977, ultrastructural results have caused this opinion to be revised. Figs 6-8 show that its central depression is not a pore containing dendrites and Fig.…”

Section: Results and Conclusion Ultrastriicturementioning

confidence: 99%

“…As well as the cheliceral papilla (pap) that is located on the denticle of the inner cheliceral digit (Waladde 1976(Waladde , 1977 high magnification SEM. These are the two pit sensilla, psl and ps2, which are located in the cuticle of the denticle adjacent to the papilla (Figs 2,4,5).…”

Section: Results and Conclusion Ultrastriicturementioning

confidence: 99%

“…Preliminary morphological studies, using light microscopy and scanning electronmicroscopy, have shown that the chelicerae of B. microplus closely resemble those described from other tick species (Arthur 1946(Arthur , 1951Gregson 1960) apart from the presence of previously undescribed structures resembling sensilla (Waladde 1976(Waladde , 1977. This paper describes the results of transmission electronmicroscopical and electrophysiological studies of the newly found cheliceral sense organs.…”

Section: Introductionmentioning

confidence: 95%

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THE SENSORY NERVOUS SYSTEM OF THE ADULT CATTLE TICK BOOPHILUS MICROPLUS (CANESTRINI) IXODIDAE. PART III. ULTRA‐STRUCTURE AND ELECTROPHYSIOLOGY OF CHELICERAL RECEPTORS

Waladde

Rice

1978

Australian Journal of Entomology

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Departniiwf c!f Entomology, U t i i w r s i t j~ (f Q u i w dotid> St Lirciu. Austruliu. 4067. AbstractThe inner and the outer cheliceral digits of the cattle tick B. niicroplus have been investigated with transmission electron microscopy and found to be innervated by sensory neurones. The outer digit has a terminal papilla innervated by two neurones which appear to be mechanoreceptors and two sensory pits, one pit innervated by eleven neurones some of which are chenioreceptors, and the other pit by a single neurone containing an unusual vacuolar organelle. A pair of neurones, which appear to be mechanoreceptors, innervate the shaft of the inner digit where it joins the cheliceral hood membranes. Thus a total of 16 neurones are located in each inner digit of the chelicerae of B. microplus. Each outer digit has a complement of 13 neurones of unknown function.Characteristic chemoreceptor responses to solutions of sodium chloride, adenosine triphosphate. reduced glutathione and bovine plasma have heen recorded from the pit sensilla of the inner digit by electrophysiological techniques. This work adds a sensory function to the chelicerae of ticks, appendages that are generally regarded as mere cutting tools. The identification of chemosensory sensilla responding to blood chemicals within the feeding lesion may have implications for work on tick-host specificity and the phenomenon of host resistance to ticks.

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Section: Results and Conclusion Ultrastriicturementioning

confidence: 99%

Section: Results and Conclusion Ultrastriicturementioning

confidence: 99%

Section: Introductionmentioning

confidence: 95%

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THE SENSORY NERVOUS SYSTEM OF THE ADULT CATTLE TICK BOOPHILUS MICROPLUS (CANESTRINI) IXODIDAE. PART III. ULTRA‐STRUCTURE AND ELECTROPHYSIOLOGY OF CHELICERAL RECEPTORS

Waladde

Rice

1978

Australian Journal of Entomology

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“…Compared with light microscopical observations made on whole mounts of the tarsi (Waladde 1976), SEM reveals only a few of the capsular sensilla. At high magnification some of these sensilla are seen below the ovate capsular opening (ov) (Fig.…”

Section: Turs~is I Strzsillamentioning

confidence: 95%

The Sensory Nervous System of the Adult Cattle Tick Boophilus Microplus (Canestrini) Ixodidae Part Ii. Scanning Electron Microscopy

Waladde

1977

Australian Journal of Entomology

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The morphology of the sensory receptors on tarsus I and on the mouthparts of the cattle tick Boophiitis ~~i c r o p h r s were examined by means of scanning electron microscopy. Features not resolved by light microscopy were revealed. The number of seiisilla and their morphology are unique to B. tnicrophrs though similar to those of other tick species already described. The sensory setae found include mechanoreceptors, contact and olfactory chemoreceptors. Of s p e c~l interest, on each inner cheliceral digit, is a denticle beuriiig a papilla at its tip and a pit at its base. The functions of these two newly describcd features are not known but it seems likely that they may include contact chcmoreceptors capable of tasting host tissue chemicals. These observations provide the foundation for transmission electron microscopy of the receptors. which is the subject of the third paper in this series. IntroductionScanning electron microscopy (SEM) has been used to study the morpholog: of sensory receptors on the lone star tick A171h/yo171171~1 C I M Z~Y~C C I I Z~~~W (L.) (Bruce 1C 71, Foelix and Axtell 1971, Foelix and Chu-Wang 1972, Chu-Wang and Axtell 1972, 1973, 1974) and on other Ixodid and Argasid species (Axtell et 01. 1971, Sixl et (11. 1971, Roshdy et a/. 1972. Sixl and Nosek 1974. Apart from the brief account of Chow and Wang (1975) this technique has not been used for detailed studies on the sensory receptors of the cattle tick Boophiliis micwplus (Canestrini) Ixodidae. A simple scheme for naming and numbering the sensillti of B. nzicruplrrs has been presented (Waladde 1976). In this study the scanning electron microscope has been used to show their structure in greater detail, thus indicating more clearly their possible functions and providing a basis for transmission electron microscopy and electrophysiological studies. The ultimate purpose of this work is to reveal the functions of the sensory iieuroiies innervating each sensillum. This information will facilitate a rational interpretation of tick behaviour.

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“…The ventral pair of foreleg claw sensilla are mechanoreceptors that function as touch or vibration receptors (Elizarov, 1963;Zolotarev and Sinitzina, 1965;ChuWang and Axtell, 1973;Axtell, 1974;Waladde, 1976Waladde, , 1977Waladde and Rice, 1982;Vlimant, 1982, 1986). The unpaired lateral seta on each of the hindleg tarsi was reported to be mechanogt|statory (Hess and Vlimant, 1983) but we did not find evidence that it perceives the MSE The six foreleg claw sensilla of prostriate ixodid ticks also contain two pairs of mechanogustatory setae similar to those of the metastriate ixodids (Hess and Vlimant, 1986).…”

Section: Discussionmentioning

confidence: 99%

Role of the male claw sensilla in perception of female mounting sex pheromone in Dermacentor variabilis, Dermacentor andersoni and Amblyomma americanum

Phillips

Sonenshine

1993

Exp Appl Acarol

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Phillips, J. S. and Sonenshinc, D. l:'. Role of the male claw sensilla in perception of female mounting sex pheromone in Dermacentor variabilis, Dermacentor amlersoni and Amblyomma americanum. Exp. Appl. Acarol., 17: 631-653.The foreleg claw sensilla of male D. variabilis, D. andersoni and A. americam~m ticks include the receptors that perceive the female contact mounting sex pheromone (MSP). In all three tick species, the foreleg claw sensilla comprise six anteriorly-directed setae arranged in three symmetrical pairs, two each on the opposite sides of the apotele of the claw and one on the ventral side, Morphological study and behavioral bioassays of these setac revealed that only d~e dorsal ,and middle (= lateral) pairs of claw sensilla are mechanogustato~', while the ventral pair are strictly mechanoreceptors. The dorsal and middle sensou' setae exhibit a single pore-like structure located at or near their tip, a feature characteristic of mechanogustatory scnsilla. These setae are similar to those found on the palps that are believed to tunction as pheromone receptors, in all three tick species, male mounting and postmounting behaviors were suppressed only when the dorsal and middle pairs of claw sensilla were ablated or covered with gelatin; normal behavior was restored when the gelatin was removed. Doseresponse bioassays were conducted with D. variabilis males to authenticate the results of the gelatin tests. The results of these bioassays demonstrated that the gelatin coat was impervious to the pheromone. The characteristics of the ixodid tick mating system that distinguish it from mating processes in other arthropods are discussed.

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THE SENSORY NERVOUS SYSTEM OF THE ADULT CATTLE TICK BOOPHILUS MICROPLUS (CANESTRINI) IXODIDAE. PART I. LIGHT MICROSCOPY

Cited by 16 publications

References 20 publications

THE SENSORY NERVOUS SYSTEM OF THE ADULT CATTLE TICK BOOPHILUS MICROPLUS (CANESTRINI) IXODIDAE. PART III. ULTRA‐STRUCTURE AND ELECTROPHYSIOLOGY OF CHELICERAL RECEPTORS

THE SENSORY NERVOUS SYSTEM OF THE ADULT CATTLE TICK BOOPHILUS MICROPLUS (CANESTRINI) IXODIDAE. PART III. ULTRA‐STRUCTURE AND ELECTROPHYSIOLOGY OF CHELICERAL RECEPTORS

The Sensory Nervous System of the Adult Cattle Tick Boophilus Microplus (Canestrini) Ixodidae Part Ii. Scanning Electron Microscopy

Role of the male claw sensilla in perception of female mounting sex pheromone in Dermacentor variabilis, Dermacentor andersoni and Amblyomma americanum

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