Results 151 to 160 of about 1,026 (191)
Support for the deuterostome clade comes from systematic errors
Silva AS +4 more
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2015
AbstractThe taxon Gastrotricha includes marine and freshwater species of microscopical size. Traditionally, two subtaxa, Macrodasyida and Chaetonotida, are distinguished. Their phylogenetic position has recently become unresolved, because the traditional concept of a closer relationship to Cycloneuralia (or Ecdysozoa) is not supported by molecular ...
Andreas Schmidt-Rhaesa +1 more
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AbstractThe taxon Gastrotricha includes marine and freshwater species of microscopical size. Traditionally, two subtaxa, Macrodasyida and Chaetonotida, are distinguished. Their phylogenetic position has recently become unresolved, because the traditional concept of a closer relationship to Cycloneuralia (or Ecdysozoa) is not supported by molecular ...
Andreas Schmidt-Rhaesa +1 more
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2023
PREFAZIONE Perché un nuovo testo di Zoologia? La risposta sta innanzitutto nella quantità di nuove informazioni, derivanti dagli studi basati sull’uso di approcci cladistici e molecolari, che hanno rivoluzionato le nostre conoscenze sui rapporti filogenetici tra gli animali, soprattutto invertebrati.
Guidi Loretta, Maria Balsamo
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PREFAZIONE Perché un nuovo testo di Zoologia? La risposta sta innanzitutto nella quantità di nuove informazioni, derivanti dagli studi basati sull’uso di approcci cladistici e molecolari, che hanno rivoluzionato le nostre conoscenze sui rapporti filogenetici tra gli animali, soprattutto invertebrati.
Guidi Loretta, Maria Balsamo
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Rhagovelia gastrotricha Padilla-Gil 2011
2023Rhagovelia gastrotricha Padilla-Gil, 2011 (Fig. 4A) Material examined. COLOMBIA. Risaralda. Pueblo Rico, Vereda Montebello, Finca Montezuma, 5.5812, - 74.929, 798 m, 2014-IV-17 (Díaz, D. & Arévalo, J. leg.): 1 apterous ♂ (UPTC-In-05867). Pueblo Rico, Vereda Montebello, estación 3, Río Claro, 2014-IV-17 (Díaz, D. & Arévalo, J.
Galindo-Malagón, Ximena Alejandra +2 more
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Nuclear DNA content in Gastrotricha
Experientia, 1995A cytofluorometric evaluation of nuclear DNA content was carried out on fifteen species of Gastrotricha. Genome size, ranging from 0.05 to 0.63 pg, appears uniform in this group and rather low compared to values found in other lower Metazoa. Differences in DNA content between the two orders of the phylum, Macrodasyida and Chaetonotida, which differ ...
BALSAMO M, MANICARDI, Gian Carlo
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2004
Gastrotricha are microscopic (0.6–3.0 mm in body length) aquatic invertebrates closely related to Nematoda, with most of which they share a meiobenthic life style. In marine habitats they are mainly interstitial whereas in fresh waters they are an important component of the periphyton and benthos; members of three freshwater families are semipelagic ...
TODARO, Mary Antonio Donatello +2 more
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Gastrotricha are microscopic (0.6–3.0 mm in body length) aquatic invertebrates closely related to Nematoda, with most of which they share a meiobenthic life style. In marine habitats they are mainly interstitial whereas in fresh waters they are an important component of the periphyton and benthos; members of three freshwater families are semipelagic ...
TODARO, Mary Antonio Donatello +2 more
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The Behavior of Heterolepidoderma sp. (Gastrotricha)
Zoological Science, 1998The behavior of Heterolepidoderma sp. was studied with the same approach as those already used for many species of ciliates. The ethogram we drew comprehends both helicoidal swimming (n = 20, r = 52.5 +/-12.2 mum, pitch = 512 +/- 101 mum, v--> = 215 +/- 43 mum/sec), periodically interrupted by irregular patterns changing the direction of the swimming ...
R, Banchetti, R, Nicola
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2002
Gastrotricha are an important component of the benthos and periphyton of freshwater habitats, where they can reach densities of up to 100 ind/10 cm-2. However, due to their small size and the difficulties met in their study, gastrotrichs, and especially aspects of their reproduction and ecology, are still poorly known.Gastrotricha are aschelminthes ...
BALSAMO M. +1 more
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Gastrotricha are an important component of the benthos and periphyton of freshwater habitats, where they can reach densities of up to 100 ind/10 cm-2. However, due to their small size and the difficulties met in their study, gastrotrichs, and especially aspects of their reproduction and ecology, are still poorly known.Gastrotricha are aschelminthes ...
BALSAMO M. +1 more
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Gastrotricha and metazoan phylogeny
Zoologica Scripta, 2002The phylogenetic position of the Gastrotricha within Bilateria and relationships among gastrotrich subgroups are reanalysed using morphological, developmental, nonsequence molecular, and ecological characters, together with the conserved regions of small‐subunit ribosomal RNA genes (SSU rDNA).
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