Biochemical and Physiological Studies of Certain Ticks (Ixodoidea). Gonad Development and Gametogenesis in Argas (Persicargas) arboreus Kaiser, Hoogstraal, and Kohls (Argasidae)

Khalil, Galila M.

doi:10.2307/3277274

Cited by 28 publications

(26 citation statements)

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“…Some authors distinguish a final step in the morphological differentiation of spermatozoa of various argasids, e.g. eversion of the acrosomal canal before penetration of the oocyte and relocation of the nucleus to the interior of the eversion (CASTEEL, 1917;OPPERMANN, 1935;WAGNER-JEVSEENKO, 1958;KHALIL, 1969;FELDMAN-MUHSAM & FILSHIE, 1976;OLIVER, 1982;PINKERTON et al, 1982).…”

Section: Discussionmentioning

confidence: 99%

“…That fertilization can occur in the ovary has been suggested by several workers (LEES & BEAMENT, 1948;KHALIL, 1969KHALIL, ,1970BRINTON & OLIVER, 1971a, b). OLIVER & BRINTON (1973) and BRINTON et al (1974) observed spermatozoa during their migration to the ovary and noted their tendency to actively penetrate not only the epithelial cells lining the ovary lumen but also those lining the oviduct.…”

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confidence: 95%

“…In spermatozoa, invagination of the acrosomal canal has previously been interpreted as a flagellum by various authors (SAMSOM, 1909;CASTEEL, 1917;OPPERMANN, 1935;TUZET & MILLOT, 1937;SHARMA, 1944) but it is now seen as an acrosome which invaginates when the sperm cell reaches the oviduct (REGER, 1963;KHALIL, 1969KHALIL, , 1970BRINTON et al, 1974;FELDMAN-MUHSAM & FILSHIE, 1976;SULEIMAN & BROWN, 1978;EL SAID & SWIDERSKI, 1980;EL SHOURA, 1987). In B. microplus, it has yet to be elucidated if the nucleus of the spermatozoa (which lies lateral and adjacent to the acrosomal canal) passes to the interior of the acrosomal canal and if this canal is everted at the time of fertilization, as described by PINKERTON et al (1982) in the soft tick O. moubata.…”

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confidence: 99%

“…Goroschenko (1965) apud BALASHOV (1972 claims that in the argasids only the nucleus of the spermatozoon penetrates the oocyte, the rest of the spermatozoon being dissolved by secretions produced by epithelial cells on the walls of the oviduct and uterus. KHALIL (1969) suggests that in Argas (Persicargas) arboreus (Kaiser, Hoogstraal & Kohls, 1968) the spermatozoon actively penetrates the primary oocyte (where it can be seen as being less basophilic than the cytoplasm of the oocyte) and degenerates, leaving only its nucleus which can be seen as a basophilic area of darkly-staining lumps of chromatin. In the ixodid Dermacentor andersoni (Styles, 1902), active penetration GARCÍA-FERNÁNDEZ et al of oocytes by spermatozoa through a structure similar to a micropyle has been suggested by various workers (BRINTON & OLIVER, 1971a, b;OLIVER & BRINTON, 1973;BRINTON et al, 1974;SONENSHINE, 1991), suggesting that only the small nucleus enters the oocytes and that the remaining tubular part of the spermatozoon does not participate in fertilization but is dissolved by secretions of the glandular epithelium of the oviduct and uterus walls.…”

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confidence: 99%

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New histochemical and morphological findings in the female genital tract of Boophilus microplus (Acari, Ixodidae): an attempt toward the elucidation of fertilization in ticks

García-Fernández

Garcia

Garcia³

et al. 2005

Iheringia, Sér. Zool.

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ABSTRACT. At present not only is the site of fertilization in ticks still unknown but it is also unclear as to how this mystery can be solved. Signs of fertilization can be observed throughout the female genital tract and these can be clues for the elucidation of the unsolved questions relating to ticks fertilization. In Boophilus microplus (Canestrini, 1887) the most important signs are the following: the final eversion of the acrosomal canal in females ready for oviposition; the presence of small tubules, resembling the subplasmalemal process of the spermatozoon between the oviduct cells; budding nuclei throughout the female genital tract; and the two Feulgen and DAPI positive areas in the oocyte at vitelogenesis. These morphological characteristics suggest that fertilization takes place in the internal cylinder which extends from the uterus to the ovary itself.KEYWORDS. Acari, ticks, female reproductive system, fertilization. RESUMO. Novas características histoquímicas e morfológicas no trato genital feminino de Boophilus microplus (Acari:Ixodidae): uma tentativa para a elucidação da fertilização nos carrapatos. Até o momento, não só o lugar da fertilização em carrapatos é desconhecido, mas também não é claro como este mistério possa ser esclarecido. Sinais de fertilização podem ser observados ao longo do trato genital feminino e estes podem ser pistas para a elucidação das questões relacionadas à fertilização em ácaros. Em Boophilus microplus (Canestrini, 1887), os sinais mais importantes são os seguintes: a eversão final do canal acrossômico em fêmeas prestes à oviposição; a presença de pequenos túbulos assemelhando-se a processos subplasmalêmicos dos espermatozóides entre as células do oviduto; brotamentos nucleares ao longo do trato genital feminino e as duas áreas Feulgen e DAPI positivas nos ovócitos em processo de vitelogênese. Estas características morfológicas sugerem que a fertilização ocorra no cilindro interno, o qual se estende desde o útero até o ovário inclusive. PALAVRAS-CHAVE.Acari, carrapatos, aparelho reprodutor feminino, fertilização.

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Section: Discussionmentioning

confidence: 99%

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confidence: 95%

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confidence: 99%

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New histochemical and morphological findings in the female genital tract of Boophilus microplus (Acari, Ixodidae): an attempt toward the elucidation of fertilization in ticks

García-Fernández

Garcia

Garcia³

et al. 2005

Iheringia, Sér. Zool.

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“…The cyst cells face the lumen and contain microvilli, so are also called 'nutritive cells' (Reger, 1961) or 'interstitial cells' (Raikhel, 1983). The development of all cells within a particular cyst is synchronous, and the number of spermatogenic cells appears to be species specific (Khalil, 1969(Khalil, , 1970. Spermatogonia and early primary spermatocytes are contained in the anterior part of the testes of unfed males.…”

Section: Introductionmentioning

confidence: 96%

Reproduction in a Metastriata Tick, Haemaphysalis longicornis (Acari: Ixodidae)

Matsuo¹,

Okura²,

Kakuda³

et al. 2013

J. Acarol. Soc. Jpn.

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The superfamily Ixodoidea includes two major families: the Ixodidae called "hard tick" and Argasidae called "soft tick". Furthermore, Ixodidae is classified into Prostriata (Ixodidae: Ixodes), and Metastriata (Ixodidae except for Ixodes) based on their reproductive strategies. That is, species in each group have characteristic reproductive organs and systems. Ticks are important as vectors of various pathogens. Haemaphysalis longicornis belonging to the Metastriata is characterized by having both the parthenogenetic and bisexual races, and is widely distributed in Australia, New Zealand, New Caledonia, the Fiji Islands, Japan, the Korean Peninsula and northeastern areas of both China and Russia. This species is known as a vector of rickettsiae causing Q fever, viruses causing Russian spring-summer encephalitis, and protozoa causing theileriosis and babesiosis. H. longicornis, the most dominant tick in Japanese pastures, is very important in agricultural and veterinary sciences because this species also transmits piroplasmosis caused by Theileria and Babesia parasites among grazing cattle. We present here an overview reproduction in the bisexual race of H. longicornis.

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The anatomy of the adult uropodid Fuscouropoda agitans (Arachnida; Acari), with comparative observations on other Acari

Woodring

Galbraith

1976

Journal of Morphology

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A thin, compressible, lateral suture and ventral plate overlap permit limited movement of the thick and rigid dorsal and ventral plates of Fuscouropoda agitans. Seven pairs of large dermal glands debouch onto the surface. Trochanteral rotation permits defensive leg adpresion and an insectan type of ambulation. The complex hypopharynx-pedipalpal-coxae has a buccal and cheliceral cavity separated by an atriculated epipharynx. The pharynx is Y-shaped in cross section. Extensive paired salivary glands lie above the very long and dexterous 3-segmented chelicerae, and a large pair of coxal glands debouch on coxae 1. From four blunt-ended tracheae, bundles of unbranching tracheoles extend in specific tracts to all organs. The ventriculus is small with three pairs of large caeca; a tightly packed single layer of digestive cells individually enlarged to absorb-phagocytize and digest the food. A typical mesostigmatid excretory tube is present. A typical acarine synganglion is present; mixed nerves have a basal swelling. A postulated neurosecretory organ arises from the pedipalpal nerve. The oocytes enlarge within funicular stalks from the walls of the small median ovary. A large spermatophore is stored in the seminal vesicle; fertilization occurs during oviposition. A tension hinge partially opens both male and female genital plates; closure effected by muscles acting on very long genital plate apodemes. Within sequentially produced spermatogonial cysts of the testes, meiosis is completely synchronous. A large, multilobed male accessory gland produces a large volume of seminal fluid; a mixture of at least four secretions. The origins and insertions of the body wall, genital organ, digestive tract, mouthpart and leg muscles are listed and illustrated. A comparison of anactinotrichid and actinotrichid mites indicates fundamental and consistent morphological differences in aspects of the cuticle, leg articulations, digestive system, excretory system, reproductive system and coxal glands.Based on external morphology it has been suggested that the Order Acari, the mites and ticks, constitute a diphyletic grouping of Actinotrichida a n d Anactinotrichida (Zachvatkin, '52; Hammen, '72). The Suborders Prostigmata, Acaridida, and Oribatida belong to the Actinotrichida; and the Mesostigmata and METHODS AND MATERIALSA viable culture of Fuscouropoda agitans (Banks, '08) permitted selection of specimens by age or sex and the observation of internal and external parts in mounted, living specimens. Culture tubes made of snap-cap vials with an internal base of plaster-of-Paris: charcoal were kept in desiccators at 95% relative humidity. A small square of 200 mesh, stainless steel screen welded over a circular hole in the cap provided aeration without loss of specimens (Rockett and Woodring, '72). Though related uropodids are probably at least in part predaceous on other mites (Radinovsky, '65; Rohde, ' 591, F. agitans was maintained solely on ground grain and the fungus that grew thereon. Entire specimens and dissected parts we...

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Biochemical and Physiological Studies of Certain Ticks (Ixodoidea). Gonad Development and Gametogenesis in Argas (Persicargas) arboreus Kaiser, Hoogstraal, and Kohls (Argasidae)

Cited by 28 publications

References 0 publications

New histochemical and morphological findings in the female genital tract of Boophilus microplus (Acari, Ixodidae): an attempt toward the elucidation of fertilization in ticks

New histochemical and morphological findings in the female genital tract of Boophilus microplus (Acari, Ixodidae): an attempt toward the elucidation of fertilization in ticks

Reproduction in a Metastriata Tick, Haemaphysalis longicornis (Acari: Ixodidae)

The anatomy of the adult uropodid Fuscouropoda agitans (Arachnida; Acari), with comparative observations on other Acari

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