Ovary ultrastructure and oogenesis in Propappus volki Michaelsen, 1916 (Annelida: Clitellata)

Gorgoń, Szymon; Krodkiewska, Mariola; Świątek, Piotr

doi:10.1016/j.jcz.2015.05.006

Cited by 12 publications

(11 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Similar processes have been described in other oligochaetes (Jamieson, ). In I. bifidus an oolemma of growing oocytes forms well developed microvilli, the thin vitelline envelope is the only egg envelope formed and no cortical granules were found—the same characters are typical for other microdriles (Jamieson, ; Urbisz et al, ; Urbisz & Świątek, ; Gorgoń et al, ).…”

Section: Discussionmentioning

confidence: 70%

“…We summarize that Insulodrilus bifidus possess female germ‐line cysts of the same composition and form as others clitellate annelids, that is, each germ line cell has one RC connecting it with the central cytophore and the fate of interconnected cell are different, that is, the majority function as NCs and only one or sometimes more become oocytes. To date, germline cysts have been described in numerous clitellates, including several families of leeches including Glossiphoniidae (Aisenstadt, ; Damas, ; Świątek, ), Hirudinidae and Haemopidae (Świątek, ; Ben Ahmed, Fuchs, Tekaya, Harrath & Świątek, ), Erpobdellidae (Świątek, Krok & Bielecki, ) and Salifidae (Urbisz, Lai, & Świątek, ) and microdrile taxa such as Lumbriculidae (Urbisz & Świątek, ), Tubificinae (Urbisz, Krodkiewska & Świątek, ; Urbisz, Chajec & Świątek, ), Limnodriloidinae (Urbisz, Chajec, Ito & Ito, ), Enchytraeidae (Paschma, ; Dumont, ; Urbisz et al, ), Naidinae (Gorgoń, Wardas, Krodkiewska & Świątek, ) and Propappidae (Gorgoń, Krodkiewska & Świątek, ). Moreover, cysts equipped with a cytophore have been noticed in such earthworms as Eisenia foetida (Chapron & Relexans, ) and Dendrobaena veneta (Siekierska, ).…”

Section: Discussionmentioning

confidence: 99%

“…Three microdrile systems have been described so far (Figure a–c). In Tubificinae (Urbisz et al, , ), Limnodriloidinae (Urbisz et al, ), Lumbriculidae (Urbisz & Świątek, ), Propappidae (Gorgoń et al, ) and additionally in leech‐like Branchiobdellidae (Świątek et al, ) female cysts unite hundreds or even thousands of cells and together with somatic cells form conically shaped ovaries. These ovaries are polarized, that is, a gradient of germ cells development occurs along its long axis; the anterior, narrow part is occupied by oogonia and germ cells entering meiosis prophase, whereas the broader distal end houses numerous NCs and usually several growing oocytes at a time.…”

Section: Discussionmentioning

confidence: 99%

“…Salifidae (Urbisz, Lai, & Świątek, 2014) and microdrile taxa such as Lumbriculidae (Urbisz & Świątek, 2013), Tubificinae (Urbisz, Krodkiewska & Świątek, 2010;Urbisz, Chajec & Świątek, 2015), Limnodriloidinae (Urbisz, Chajec, Ito & Ito, 2018), Enchytraeidae (Paschma, 1962;Dumont, 1969;Urbisz et al, 2017), Naidinae (Gorgo n, Wardas, Krodkiewska & Świątek, 2017) and Propappidae (Gorgo n, Krodkiewska & Świątek, 2015). Moreover, cysts equipped with a cytophore have been noticed in such earthworms as Eisenia foetida (Chapron & Relexans, 1971) and Dendrobaena veneta (Siekierska, 2003).…”

Section: Insulodrilus Bifidus Female Germ Cells Form Syncytial Meromentioning

confidence: 99%

See 3 more Smart Citations

Description of ovary organization and oogenesis in a phreodrilid clitellate

Świątek

Pinder²,

Gajda

2019

Journal of Morphology

Self Cite

View full text Add to dashboard Cite

Phreodrilidae is a small family uniting about 50 species of minute freshwater clitellate annelids inhabiting mainly the Southern hemisphere. Other than the male and spermathecal genitalia, their internal organization is poorly known. Here, we present results of our study of the ovaries and oogenesis in Insulodrilus bifidus, a phreodrilid from Western Australia using light and electron microscopy. The ovaries are paired and located in segment XII. They are inconspicuous and composed of several (10–12) spherical germ‐line cysts loosely interconnected by flattened somatic cells. The cysts usually comprise 32 germ cells and each cell is connected via a cytoplasmic bridge (ring canal) to the central cytoplasmic mass (the cytophore). In ovaries, germ cells in a given cyst develop in full synchrony. However, there is no synchrony among cysts, so there is a developmental gradient of cysts (from oogonial to early meiotic) along the longitudinal ovary axis. Within the cysts that are located in the distal end of the ovary the synchrony is finally lost and interconnected cells diversify into two morphologically distinct categories: an oocyte and 31 nurse cells. Such cysts detach from the ovaries and further development occurs within the body cavity. The oocyte gathers nutrients, mainly in form of yolk spheres, whereas nurse cells grow slightly and do not gather yolk. Organelles such as ribosomes, mitochondria and endoplasmic reticulum pass freely through the ring canals and are present within the cytophore, which suggests cytoplasmic transfer towards the oocyte. The formation of female germ‐line cysts equipped with cytophore and cells differentiated into oocyte and nurse cells matches the general pattern of oogenesis found in clitellates. In details, the ovary organization and oogenesis found in I. bifidus resembles the situation described in some representatives of Naidinae and Enchytraeidae.

show abstract

Section: Discussionmentioning

confidence: 70%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Insulodrilus Bifidus Female Germ Cells Form Syncytial Meromentioning

confidence: 99%

See 2 more Smart Citations

Description of ovary organization and oogenesis in a phreodrilid clitellate

Świątek

Pinder²,

Gajda

2019

Journal of Morphology

Self Cite

View full text Add to dashboard Cite

show abstract

“…According to Brinkhurst (1994), the two families would be sister taxa; however, a comprehensive molecular analysis has failed to recover any close relationship between them (Erséus et al 2010). Ovary organization and oogenesis are also stated to differ between the two families (Gorgoń et al 2015), but the comparison should be extended to include more representatives of enchytraeids (for instance, Rota and Manconi 2004 reported different types of ovary organization among enchytraeid species of Marionina ).…”

Section: General Descriptionmentioning

confidence: 99%

Fauna Europaea: Annelida - Terrestrial Oligochaeta (Enchytraeidae and Megadrili), Aphanoneura and Polychaeta

Rota¹,

Jong²

2015

BDJ

View full text Add to dashboard Cite

Fauna Europaea provides a public web-service with an index of scientific names (including important synonyms) of all living European land and freshwater animals, their geographical distribution at country level (up to the Urals, excluding the Caucasus region), and some additional information. The Fauna Europaea project covers about 230,000 taxonomic names, including 130,000 accepted species and 14,000 accepted subspecies, which is much more than the originally projected number of 100,000 species. This represents a huge effort by more than 400 contributing specialists throughout Europe and is a unique (standard) reference suitable for many users in science, government, industry, nature conservation and education.This paper provides updated information on the taxonomic composition and distribution of the Annelida - terrestrial Oligochaeta (Megadrili and Enchytraeidae), Aphanoneura and Polychaeta, recorded in Europe. Data on 18 families, 11 autochthonous and 7 allochthonous, represented in our continent by a total of 800 species, are reviewed, beginning from their distinctness, phylogenetic status, diversity and global distribution, and following with major recent developments in taxonomic and faunistic research in Europe. A rich list of relevant references is appended. The Fauna Europaea Annelida - terrestrial Oligochaeta data-set, as completed in 2004, will be updated accordingly.

show abstract

Microorganization of ovaries and oogenesis of Haplotaxis sp. (Clitellata: Haplotaxidae)

Urbisz

Martin

Lagnika

et al. 2020

Journal of Morphology

Self Cite

View full text Add to dashboard Cite

Ovaries of Haplotaxis sp. were studied in active and nonactive states, that is, in a sexually mature specimen and in specimens outside of the reproductive period. Two pairs of ovaries were found in segments XI and XII. Especially in the nonactive state, they were in close contact with copulatory glands. Each ovary was composed of germ cells interconnected with syncytial cysts, which were enveloped by a layer of somatic cells. Within cysts each germ cell had one ring canal connecting it to the common anuclear cytoplasmic mass called a cytophore. During oogenesis clustering germ cells differentiated into nurse cells and oocytes; thus, the oogenesis was recognized as meroistic. Vitellogenic oocytes were detached from the ovaries and continued yolk absorption within the body cavity. Because recent studies have shown the variety of ovaries and germ line cyst organization in clitellates and suggest their evolutionary conservatism at the family or subfamily level, the data presented here can be valid in understanding the phylogenetic relationships among Clitellata. In this context, ovaries found in Haplotaxis sp. resembled those of the "Tubifex" type. "Tubifex" ovaries are characteristic for numerous microdrile taxa (tubificines, limnodriloidines, propappids, lumbriculids, and leech-like branchiobdellids) and can be regarded as the primary character for these Clitellata in which germ-line cysts are formed during early oogenesis. As the family Haplotaxidae is currently considered to be paraphyletic and the species studied here belongs to Haplotaxidae sensu stricto, our results support the close relationship of Haplotaxidae sensu stricto to the clade consisting of Lumbriculidae, Branchiobdellida, and Hirudinida, in which lumbriculids are sister to the latter two.

show abstract

Ovary ultrastructure and oogenesis in Propappus volki Michaelsen, 1916 (Annelida: Clitellata)

Cited by 12 publications

References 43 publications

Description of ovary organization and oogenesis in a phreodrilid clitellate

Description of ovary organization and oogenesis in a phreodrilid clitellate

Fauna Europaea: Annelida - Terrestrial Oligochaeta (Enchytraeidae and Megadrili), Aphanoneura and Polychaeta

Microorganization of ovaries and oogenesis of Haplotaxis sp. (Clitellata: Haplotaxidae)

Contact Info

Product

Resources

About