Spermiogenesis in &lt;i&gt;Laccifer lacca&lt;/i&gt; (Kerr) (Lacciferidae-Coccoidea)

Dikshith, T. S. S.

doi:10.1508/cytologia.31.302

Cited by 8 publications

(12 citation statements)

References 18 publications

(4 reference statements)

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“…The same occurs in K. lacca , where two binucleated spermatids fuse to form quadrinucleated spermatids. The spermatids then undergo morphological change to become spermatozoa (Dikshith 1965). In K. chinensis , most cysts harbor 16 quadrinucleate spermatids and in each quadrinucleate spermatid, two sperm tails grow out at the peripheral of spermatid next to the euchromatic nuclei in opposite directions, clockwise and counter-clockwise.…”

Section: Discussionmentioning

confidence: 99%

“…Kerriidae and Pseudococcidae (Hemiptera) spermatogenesis are known to be quite different from the typical process in insects since their spermatids are obtained via inverted meiosis (Brown 1959; Dikshith 1965; Bongiorni et al . 2004).…”

Section: Introductionmentioning

confidence: 99%

“…The reductional division occurs in the second division where homologous chromosomes segregate and four haploid spermatids are obtained. In Kerriidae and Pseudococcidae, instead of producing four haploid spermatids, one spermatid with four haploid nuclei is obtained (Dikshith 1965; Bongiorni et al . 2004).…”

Section: Introductionmentioning

confidence: 99%

“…1984). Thus, each spermatid cyst produces 32 spermatozoa that are divided into two bundles with 16 spermatozoa per bundle (Dikshith 1965).…”

Section: Introductionmentioning

confidence: 99%

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Morphology of testes, spermatogenesis, sperm bundles, and spermatozoa ofKerria chinensis(Hemiptera: Kerriidae)

et al. 2018

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The filamentous spermatozoa of scale insects (Hemiptera) are highly modified compared with those of typical insects. Here, we investigate the morphology of the testes, sperm bundles, spermatozoa, and spermatogenesis of the winglessKerria chinensis(Mahdihassan) (Hemiptera: Kerriidae), a shellac-producing scale insect. Each testis contains two antiparallel groups of several hundred syncytial sperm bundles. In each spermatocyte cyst, 16 primary spermatocytes divide via inverted meiosis, resulting in 16 quadrinucleated spermatids, each having two euchromatic and two heterochromatic nuclei. During spermiogenesis, each spermatid produces two spermatozoa protruding out of the spermatid close to the two euchromatic nuclei and their tails then grow in opposite directions. In each cyst, the 32 spermatozoa form two sperm bundles lying in an antiparallel direction oriented to different ends of the testis. Each spermatozoon has three distinct regions, an apex, a filamentous region and a tail. The spermatozoa have long thread-like nuclear cores that occupy about one-fourth of the sperm body length, located primarily in the posterior half. At the anterior end of the spermatozoon is a translucent, swollen vesicle and a distal, densely-stained structure; a putative acrosome of a type not previously reported in the spermatozoa of scale insects.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…1984). Thus, each spermatid cyst produces 32 spermatozoa that are divided into two bundles with 16 spermatozoa per bundle (Dikshith 1965).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Morphology of testes, spermatogenesis, sperm bundles, and spermatozoa ofKerria chinensis(Hemiptera: Kerriidae)

et al. 2018

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“…Some postmeiotic complications are known to change the final number per cyst, without affecting the 2n principle, however. Thus in mealybugs, half of the 64 spermatids die, and the rest is rearranged in two sperm bundles (NuR 1962;DIKSHITH 1966). Division of the cyst to form two sperm bundles is known from Coleoptera also: Mylabris pustulata (Bruchidae; OMURA 1957) and Tenebrio molitor (Tenebrionidae;VIRKKI 1956).…”

Section: Discussionmentioning

confidence: 99%