The evolution of the protonephridial terminal organ across Rotifera with particular emphasis on Dicranophorus forcipatus, Encentrum mucronatum and Erignatha clastopis (Rotifera: Dicranophoridae)

Riemann, Ole; Ahlrichs, Wilko H.

doi:10.1111/j.1463-6395.2008.00399.x

Cited by 5 publications

(6 citation statements)

References 18 publications

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“…Ultrastructural investigations using transmission electron microscopy (TEM) and/or scanning electron microscopy (SEM) were performed on the different organ systems (e.g., Clément & Wurdak 1991, Clément 1993, Melone 1998, Riemann & Ahlrichs 2010. Ultrastructural investigations using transmission electron microscopy (TEM) and/or scanning electron microscopy (SEM) were performed on the different organ systems (e.g., Clément & Wurdak 1991, Clément 1993, Melone 1998, Riemann & Ahlrichs 2010.…”

Section: Morphologymentioning

confidence: 99%

“…The excretory system of rotifers has been studied by LM (e.g., Remane 1933, Brakenhoff 1937, Pontin 1964 and TEM (e.g., Braun et al 1966, Mattern & Daniel 1966b, Warner 1969, Schramm 1978b, Clément & Wurdak 1991, Ahlrichs 1993, Riemann & Ahlrichs 2010. It consists of 2 similar protonephridia lying ventrolaterally in the pseudocoel.…”

Section: Excretory System Of the Femalementioning

confidence: 99%

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4. Rotifera

Fontaneto¹,

Smet²

2014

Gastrotricha and Gnathifera

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Section: Morphologymentioning

confidence: 99%

Section: Excretory System Of the Femalementioning

confidence: 99%

4. Rotifera

Fontaneto¹,

Smet²

2014

Gastrotricha and Gnathifera

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“…Ehlers 1994; Rohde and Watson 1994), Gnathostomulida (Lammert 1985), Rotifera (e.g. Ahlrichs 1993a,b; Riemann and Ahlrichs 2010 and references therein), and Scalidophora (e.g. Alberti and Storch 1986; Kristensen and Hay‐Schmidt 1989; Neuhaus and Kristensen 2007).…”

Section: Introductionmentioning

confidence: 99%

Ultrastructural observations of the protonephridia of Polymerurus nodicaudus (Gastrotricha: Paucitubulatina)

Kieneke

Hochberg

2010

Acta Zoologica

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Kieneke, A. and Hochberg, R. 2012. Ultrastructural observations of the protonephridia of Polymerurus nodicaudus (Gastrotricha: Paucitubulatina). -Acta Zoologica (Stockholm) 93: 115-124.We studied different regions of the protonephridia of the limnic gastrotrich Polymerurus nodicaudus by means of light and electron microscopy to determine how freshwater species might differ from their marine relatives. Microscopic and ultrastructural characters are in accordance with another limnic species of Paucitubulatina, Chaetonotus maximus, whose protonephridial system has been previously reconstructed. Shared protonephridial characters of both species include the presence of highly elongate terminal organ cilia, microvilli, and the canal cell lumen as well as the presence of a conspicuous anterior loop of the protonephridial lumen. These features are not present in representatives of earlier, marine, paucitubulatan lineages (i.e., Xenotrichulidae) and so are assessed as evolutionary novelties that were likely important for the successful colonization of the freshwater environment.

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“…The terminal organs have typical monogonont organization with several cilia forming a common unison flame (e.g. (38)). The movement of those flames was observed in both sexes in LM examination of living specimens.…”

Section: Discussionmentioning

confidence: 99%

Morphology of the nervous system of monogonont rotiferEpiphanes sentawith focus on sexual dimorphism between feeding females and dwarfed males

Gąsiorowski

Furu

Hejnol

2019

Preprint

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BackgroundMonogononta is a large clade of rotifers comprised of diverse morphological forms found in a wide range of ecological habitats. Most of the monogonont species display a cyclical parthenogenesis, where generations of asexually reproducing females are interspaced by mixis events when sexual reproduction occurs between mictic females and dwarfed, haploid males. The morphology of monogonont feeding females is relatively well described, however data on male anatomy are very limited. Thus far, male musculature of only two species has been described with confocal laser scanning microscopy (CLSM) and it remained unknown how dwarfism influences neuroanatomy of males.ResultsHere, we provide a CLSM-based description of the nervous system of both sexes ofEpiphanes senta, a freshwater monogonont rotifer. The general nervous system architecture is similar between males and females and shows same level of complexity. However, the nervous system in males is more compact and lacks its stomatogastric part.ConclusionComparison of the neuroanatomy between male and normal-sized feeding females provides better understanding of the nature of male dwarfism in Monogononta. We propose that dwarfism of monogonont non-feeding males is a specific case of progenesis as they, due to their inability to feed, retain a juvenile body size. Reduction of the stomatogastric nervous system in the males correlates with the loss of entire digestive tract and associated morphological structures.

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The evolution of the protonephridial terminal organ across Rotifera with particular emphasis on Dicranophorus forcipatus, Encentrum mucronatum and Erignatha clastopis (Rotifera: Dicranophoridae)

Cited by 5 publications

References 18 publications

4. Rotifera

4. Rotifera

Ultrastructural observations of the protonephridia of Polymerurus nodicaudus (Gastrotricha: Paucitubulatina)

Morphology of the nervous system of monogonont rotiferEpiphanes sentawith focus on sexual dimorphism between feeding females and dwarfed males

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