Two new interesting genera of Gastrotricha (Macrodasyida and Chaetonotida) from the Brazilian freshwater psammon

Kisielewski, Jacek

doi:10.1007/bf00005502

Cited by 40 publications

(53 citation statements)

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“…The other families show a limited distribution: the rare Dichaeturidae have been occasionally found in few European sites, the ditypic Proichthydiidae are only known from South America and Asia, and the subfamily Undulinae (Chaetonotidae) is reported from one site in Amazonia (see Schwank, 1990;Kisielewski, 1991). The only two freshwater monotypic genera of the order Macrodasyida, each recorded in one site, are known only in Europe and South America, respectively (RuttnerKolisko, 1955;Kisielewski, 1987). At a superspecific level, almost a half of the genera show an intercontinental distribution.…”

Section: Estimated Global Diversitymentioning

confidence: 98%

“…Single or few records are available for other European countries, or even none at all from Portugal [except for Azores] and Netherlands. Data from North America mainly concerns the US (see Weiss, 2001), and Canada (Schwank, 1990), whilst from Central and South America records regard Argentina (see Grosso & Drahg, 1991), Brazil (Kisielewski, 1987(Kisielewski, , 1991 and French Guyana (d 'Hondt et al, 2006). Some information is available for Colombia, Jamaica, Paraguay, Uruguay (see Schwank, 1990).…”

Section: Zoogeography and Endemicitymentioning

confidence: 98%

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Global diversity of gastrotrichs (Gastrotricha) in fresh waters

et al. 2007

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The global diversity of inland water Gastrotricha is poorly known, and information is extremely heterogeneous. Gastrotricha have been studied most widely in Europe and America, whereas data from the other continents are scattered or not even available. This scanty information is related to several reasons, first of which is the technical difficulty in collecting and studying microscopic and soft-bodied species. In addition, the research has been limited mostly to the epibenthos and periphyton in lentic waters, and the gastrotrich taxonomy is still under discussion mainly because of the great intraspecific variability. Three of the five freshwater families are widespread or cosmopolitan, and most genera have been reported from at least two continents. There is strong evidence of a high diversity in genera and species in tropical areas. Nearly a half of the freshwater species are known from only one country or even only from one site, but the insufficient faunistic knowledge does not allow defining them as endemic. The phylogenetic relation-ships and possible evolutionary trends of inland water species of Gastrotricha are outlined

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Section: Estimated Global Diversitymentioning

confidence: 98%

Section: Zoogeography and Endemicitymentioning

confidence: 98%

Global diversity of gastrotrichs (Gastrotricha) in fresh waters

et al. 2007

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“…The order Macrodasyida includes only 2 freshwater species: Redudasys fornerise , belonging to the family Redudasyidae (which also comprises a marine species, see Todaro et al 2012), and Marinellina flagellata , which was previously assigned either to Macrodasyida (Ruttner-Kolisko 1955, Kisielewski 1987) or to Chaetonotida, in the freshwater family Dichaeturidae (Remane 1961) and is now considered a Macrodasyida incertae sedis . It is the only Macrodasyida species known from Europe, where it was found only once in Austria (Ruttner-Kolisko 1955).…”

Section: General Descriptionmentioning

confidence: 99%

Fauna Europaea: Gastrotricha

Balsamo¹,

D'hondt²,

Kisielewski³

et al. 2015

BDJ

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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.Gastrotricha are a meiobenthic phylum composed of 813 species known so far (2 orders, 17 families) of free-living microinvertebrates commonly present and actively moving on and into sediments of aquatic ecosystems, 339 of which live in fresh and brackish waters. The Fauna Europaea database includes 214 species of Chaetonotida (4 families) plus a single species of Macrodasyida incertae sedis. This paper deals with the 224 European freshwater species known so far, 9 of which, all of Chaetonotida, have been described subsequently and will be included in the next database version. Basic information on their biology and ecology are summarized, and a list of selected, main references is given. As a general conclusion the gastrotrich fauna from Europe is the best known compared with that of other continents, but shows some important gaps of knowledge in Eastern and Southern regions.

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“…Knowledge on species from the interstitial habitat is more scanty, and suggestive of a poorly diversified fauna, even if composed of species of great taxonomical interest (Preobrajenskaia, 1926 ;RuttnerKolisko, 1955 ;d'Hondt, 1967 ;Roszczak, 1969 ;Evans, 1982 ;Strayer, 1985 ;Balsamo & Kisielewski, 1986 ;Kisielewska & Kisielewski, 1986 ;Hummon, 1987 ;Kisielewski, 1987Kisielewski, , 1990Kisielewski, , 1991 . To date only 40 163 species of freshwater gastrotrichs have been collected in the interstitial, compared to 246 in other environments .…”

Section: Introductionmentioning

confidence: 99%

Gastrotrichs from interstitial fresh water, with a description of four new species

Balsamo

Fregni

1995

Hydrobiologia

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A study was performed on freshwater gastrotrichs living in the interstitial habitat of some lakes in Latium and of Lake Garda (Italy) . Thirty-two chetonotids were collected, twenty-five of which could be identified . Four are new to science (Chaetonotus (Hystricochaetonotus) benacensis, Heterolepidoderma lamellatum, Ichthydium plicatum, I. squamigerum), and two are new to the Italian fauna (Heterolepidoderma macrops, H . majus) . The faunistic composition of the lakes is compared with previous data . Interstitial gastrotrichs are less varied and abundant than those of epibenthos and periphyton, but often are of taxonomical and zoogeographical interest . The presence in the interstitial of some epibenthic and periphytic species demonstrates their capacity to colonize ecologically different habitats . The grain size of the substrate was not clearly correlated with faunal richness, but there was a possible influence of the amount of the organic detritus in the sediment . Morphological analysis showed a prevalence of small sized animals, with poorly ornamentated cuticular covering and well developed locomotory ciliature, as probable adaptations to interstitial life .Abbreviations : b = dorsal sensory bristles ; d = dorsal ; dl = dorsolateral ; f = furca ; h = head ; n = neck ; L = length ; T L = total length ; lat = lateral ; ph = pharynx ; p1= ventral terminal plates ; v = ventral scale/s ; sp = spine/s ; spec = specimens ; tr = trunk ; v = ventral ; w = width .

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Two new interesting genera of Gastrotricha (Macrodasyida and Chaetonotida) from the Brazilian freshwater psammon

Cited by 40 publications

References 1 publication

Global diversity of gastrotrichs (Gastrotricha) in fresh waters

Global diversity of gastrotrichs (Gastrotricha) in fresh waters

Fauna Europaea: Gastrotricha

Gastrotrichs from interstitial fresh water, with a description of four new species

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