Structure of the female reproductive system of the lac insect, <i><scp>K</scp>erria chinensis</i> (<scp>S</scp>ternorrhyncha, <scp>C</scp>occoidea: <scp>K</scp>erridae)

Ngernsiri, Lertluk; Piyajaraprasert, Wichian; Wisoram, Wijit; Merritt, David J.

doi:10.1111/azo.12078

Cited by 4 publications

(2 citation statements)

References 26 publications

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“…In K. chinensis, spermatozoa remain congregated in a bundle after excess cytoplasm is eliminated. During mating, the sperm bundles are transferred into the spermatheca of a young female (about 60 days old) whose ovaries have just started developing (Ngernsiri et al 2015). Dissection of the ovaries of older, developing females (about 75 days old) revealed that spermatozoa were present in their lateral oviducts (image not shown).…”

Section: Discussionmentioning

confidence: 99%

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%

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

et al. 2018

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“…Therefore, the recent view is that there are truly only two main reproductive strategies: viviparity and oviparity ( Ostrovsky, 2013 ; Ostrovsky et al, 2016 ). In previous studies, some insects, such as cockroaches ( Warnecke & Hintze-Podufal, 1996 ), aphids ( Ortiz Rivas, Moya & Torres, 2004 ), tsetse flies ( Meier, Kotrba & Ferrar, 1999 ), thrips ( Kranz et al, 2002 ), and scale insects ( Gavrilov & Kuznetsova, 2007 ; Ngernsiri et al, 2015 ), were described as Ovoviviparous species. Scale insects (Hemiptera: Sternorrhyncha: Coccoidea), like many Hemiptera, feed on sap drawn directly from the plant vascular system and secrete a waxy coating for defense; in addition, many scale insect species are major quarantine pests of agricultural or ornamental plants in tropical/subtropical climates as well as in greenhouses in temperate zones worldwide ( Gullan & Kosztarab, 1997 ; Gavrilov-Zimin, 2018 ).…”

Section: Introductionmentioning

confidence: 99%

Reproductive pattern in the solanum mealybug,Phenacoccus solani: A new perspective

Huang

Zhi

Zhang³

et al. 2020

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Background The reproductive pattern of most scale insects is ovoviviparity. The solanum mealybug, Phenacoccus solani (Hemiptera: Pseudococcidae), is known as a thelytokous parthenogenetic species, but there is still debate about the reproductive strategies of this species. Methods Here, we investigated the oviposition characteristics of P. solani and used scanning/transmission electron microscopy and RNA-seq to identify the differences between two types of eggs. Results We found that P. solani laid two types of eggs in one batch, with no significant difference in apparent size: one with eyespots that hatched and another without eyespots that failed to hatch. Furthermore, the physiological and molecular differences between the two types of eggs were highly significant. KEGG enrichment analysis revealed significant enrichment for the JAK-STAT, Notch, Hippo, and Wnt signaling pathways and dorsoventral axis formation, wax biosynthesis, cell cycle, insulin secretion, and nitrogen metabolism pathways. The results suggest that the embryo of the egg undergoes development inside the mother and only a short molting period outside the mother. Discussion Ovoviviparous species produce eggs and keep them inside the mother’s body until they are ready to hatch, and the offspring exits the egg shell during or immediately following oviposition. Therefore, we suggest that the reproductive pattern of P. solani can be described as ovoviviparity.

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Morphology of ovary and spermathecae of the parasitoid Eibesfeldtphora tonhascai Brown (Diptera: Phoridae)

et al. 2018

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Eibesfeldtphora tonhascai (Diptera: Phoridae) is a parasitoid of leaf-cutting ants and a potential biological control agent against these insect pests. This study describes the morphology of the ovary and spermatheca of E. tonhascai. The female reproductive tract of this parasitoid has a pair of meroistic polytrophic ovaries, two lateral oviducts that open into a common oviduct, an elongated accessory gland, and two spermathecae. Young oocytes are small and spherical, and their size increases as yolk is stored in the cytoplasm. This process is followed by chorion production by follicular cells. Mature oocytes are elliptical or torpedo-shaped. The reservoir wall of the spermatheca has type III glandular cells with cytoplasm rich in free ribosomes, rough endoplasmic reticulum, and secretory vesicles. The apical surface of these cells has microvilli associated with mitochondria. The reservoir lumen is lined by a cuticle and filled with spermatozoa. This is the first report of the ovary and spermatheca morphology of E. tonhascai and contributes to the comprehension of the reproductive biology of this parasitoid of leaf-cutting ants.

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Structure of the female reproductive system of the lac insect, Kerria chinensis (Sternorrhyncha, Coccoidea: Kerridae)

Cited by 4 publications

References 26 publications

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

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

Reproductive pattern in the solanum mealybug,Phenacoccus solani: A new perspective

Morphology of ovary and spermathecae of the parasitoid Eibesfeldtphora tonhascai Brown (Diptera: Phoridae)

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