The muscular system of Musellifer delamarei (Renaud-Mornant, 1968) and other chaetonotidans with implications for the phylogeny and systematization of the Paucitubulatina (Gastrotricha)
@article{Leasi2008TheMS, title={The muscular system of Musellifer delamarei (Renaud-Mornant, 1968) and other chaetonotidans with implications for the phylogeny and systematization of the Paucitubulatina (Gastrotricha)}, author={Francesca Leasi and M. Antonio Todaro}, journal={Biological Journal of The Linnean Society}, year={2008}, volume={94}, pages={379-398} }
We studied comparatively the muscle organization of several gastrotrich species, aiming at shedding some light on the evolutionary relationships among the taxa of the suborder Paucitubulatina. Under confocal laser scanning microscope, the circular muscles were present in the splanchnic position as incomplete circular rings in Musellifer delamarei (Chaetonotidae) and Xenotrichula intermedia (Xenotrichulidae) and as dorsoventral bands in Xenotrichula punctata, Heteroxenotrichula squamosa and…
Figures and Tables from this paper
50 Citations
Neuromuscular study of early branching Diuronotus aspetos (Paucitubulatina) yields insights into the evolution of organs systems in Gastrotricha
- BiologyZoological Letters
- 2016
Several neural structures of Diuronotus resemble those found in Xenotrichula (Xenotrichulidae) and may constitute new apomorphies of Paucitubulatina, or even Gastrotricha.
Ultrastructural observations of the protonephridia of Polymerurus nodicaudus (Gastrotricha: Paucitubulatina)
- Biology
- 2012
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 in representatives of earlier, marine, paucitubulatan lineages and so are assessed as evolutionary novelties that were likely important for the successful colonization of the freshwater environment.
Two new species of Musellifer (Gastrotricha: Chaetonotida) from Florida and Tobago and the systematic placement of the genus within Paucitubulatina
- Biology
- 2014
Two new species of marine Gastrotricha are described from the Atlantic coast of Florida and the west coast of Tobago, both of which lack a muzzle bearing the mouth, which is a diagnostic character of the genus Musellifer.
Detailed reconstruction of the musculature in Limnognathia maerski (Micrognathozoa) and comparison with other Gnathifera
- BiologyFrontiers in Zoology
- 2014
This study reveals a complex body wall musculature, comprising six pairs of main longitudinal muscles and 13 pairs of trunk dorso-ventral muscles, and suggests a closer functional resemblance to the jaw organization in Rotifera.
The phylogenetic position of Neogosseidae (Gastrotricha: Chaetonotida) and the origin of planktonic Gastrotricha
- BiologyOrganisms Diversity & Evolution
- 2015
High support is found for a common origin of planktonic gastrotrichs, with monophyly of both Dasydytidae and Neogosseidae, and it is implied that the motile spines and underlying muscle patterns that control them in species of Dasydiestidae are adaptations to the planktonics environment that evolved independently of those in other species of Gastrotricha.
Structure, function and evolution of somatic musculature in Dasydytidae (Paucitubulatina, Gastrotricha)
- BiologyZoomorphology
- 2012
Structural and behavioral observations suggest that muscular spine abduction in D. goniathrix is brought about by synergistic contraction of the musculi obliqua and m.
Sweet or salty? The origin of freshwater gastrotrichs (Gastrotricha, Chaetonotida) revealed by molecular phylogenetic analysis
- BiologyCladistics : the international journal of the Willi Hennig Society
- 2020
The results revealed that the freshwater genus Bifidochaetus is the earliest branching lineage in the paraphyletic Chaetonotidae (encompassing Dasydytidae and Neogosseidae), which supports Kisielewski's morphological based hypothesis concerning undifferentiated type of body scales as a most primary character in ChaetonOTidae.
Diuronotus aspetos (Gastrotricha): new morphological data and description of the spermatozoon
- BiologyHelgoland Marine Research
- 2009
The genus Diuronotus (Gastrotricha Chaetonotida) includes two species, D. aspetos and D. rupperti; its morphological affinity with the genus Musellifer has been pointed out. Here, new morphological…
New Chaetonotus (Wolterecka. Semovitus sp. nov. (Gastrotricha: Chaetonotida: Chaetonotidae) from a Palm House in Vienna (Austria)
- BiologyAnnales Zoologici
- 2019
A new representative of Wolterecka is described, namely Chaetonotus (W.) semovitussp.
References
SHOWING 1-10 OF 49 REFERENCES
The muscular system of Dactylopodola baltica and other macrodasyidan gastrotrichs in a functional and phylogenetic perspective
- Biology
- 2001
The overall arrangement of the muscular system of D. baltica showed several similarities to other macrodasyidan gastrotrichs, including the presence and location of circular, helicoidal and longitudinal muscles, their orientation with respect to the longitudinal body axis and their points of insertion.
Musculature of the primitive gastrotrich Neodasys (Chaetonotida): functional adaptations to the interstitial environment and phylogenetic significance
- Biology
- 2005
Results suggest that reductions in midgut musculature may be functionally related to oviposition and, as such, are probably not homologous with similar reductions of circular muscles in other species of Chaetonotida.
The musculature of three species of gastrotrichs surveyed with confocal laser scanning microscopy (CLSM)
- Biology
- 2006
A comparative study of the muscle organization in three species of Gastrotricha from the orders Macrodasyida ( Paradasys sp., Lepidodasyidae; Turbanella sp., Turbanellidae) and Chaetonotida suggests a potential basal position for Polymerurus, and indicates a unique phylogenetic position for Aspidiophorus.
Phylogeny of Gastrotricha: a morphology-based framework of gastrotrich relationships.
- BiologyThe Biological bulletin
- 2000
The first cladistic analysis of nearly all known gastrotrich genera using 71 morphological characters suggests that the Gastrotricha is a monophyletic group with its most primitive taxa distributed among the families Dactylopodolidae and Neodasyidae.
Comparative sperm ultrastructure of Neodasys ciritus and Musellifer delamarei, two species considered to be basal among Chaetonotida (Gastrotricha)
- BiologyZoomorphology
- 2003
The spermatozoa of two species supposed to be basal to Gastrotricha Chaetonotida, Neodasys ciritus and Musellifer delamarei, were studied in order to supply further elements to the understanding of…
Morphology of Xenodasys (Gastrotricha): the first species from the Mediterranean Sea and the establishment of Chordodasiopsis gen. nov. and Xenodasyidae fam. nov.
- BiologyJournal of the Marine Biological Association of the United Kingdom
- 2006
During a survey of the Italian marine meiofauna, several specimens of the rare gastrotrich genus Xenodasys were found in a submarine cave along the Ionian coast of Apulia. The finding represents the…
Comparative ultrastructure of the gastrotrich pharynx and the evolution of myoepithelial foreguts in aschelminthes
- BiologyZoomorphology
- 2004
It is concluded that Gastrotricha (Chaetonotida-Paucitubulatina) and Nematoda share several apomorphic characters and share, therefore, a most recent common ancestor.
A muscular double helix in Gastrotricha
- Biology, Medicine
- 2001
The proposed functions of helicoidal muscles include antagonization of radial dilations of the digestive tract during feeding, pressurization of the intestine and closure of the pharyngeal-intestinal valve in chaetonotidans, and prevention of intestinal kinking during changes in body shape.
The musculature of Draculiciteria tessalata (Chaetonotida, Paucitubulatina): implications for the evolution of dorsoventral muscles in Gastrotricha
- BiologyHydrobiologia
- 2004
A hypothesis on the evolution of dor soventral muscles in D. tessalata is proposed which includes a splitting of circular muscles into separate somatic and splanchnic components with a further displacement of both muscle sets into a dorsoventral orientation.
Are meiofaunal species cosmopolitan? Morphological and molecular analysis of Xenotrichula intermedia (Gastrotricha: Chaetonotida)
- Biology
- 1996
The high genetic divergence and the inability to clearly separate populations based on morphology suggest that individuals characterized by different haplotypes are genetically isolated sibling species.