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Publikasjoner (10 av 28) Visa alla publikasjoner
Todaro, M. A., Dal Zotto, M., Kånneby, T. & Hochberg, R. (2019). Integrated data analysis allows the establishment of a new, cosmopolitan genus of marine Macrodasyida (Gastrotricha). Scientific Reports, 9(1), Article ID 7989.
Åpne denne publikasjonen i ny fane eller vindu >>Integrated data analysis allows the establishment of a new, cosmopolitan genus of marine Macrodasyida (Gastrotricha)
2019 (engelsk)Inngår i: Scientific Reports, E-ISSN 2045-2322, Vol. 9, nr 1, artikkel-id 7989Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Macrodasyida (phylum Gastrotricha) comprises 365 species distributed across 34 genera and 10 families. However, current classification is under revision due to the contradictory results of molecular and morphological cladistic analyses. Studies aimed at bridging the gaps took advantage of supplementary assessments of poorly known species and particularly from observations of new taxa showing original traits that could help to identify plesiomorphic character states in these anatomically diverse micrometazoa. We follow this path by describing three new interesting macrodasyidan species respectively from Italy, Brazil and Sweden. In many respects, the new species resemble most closely species of the genus Macrodasys; however, details of the external morphology, in combination with the different lay-out of the reproductive system and the tiny spermatozoa lacking a visible flagellum, suggest they belong to a new genus, possibly in the family Macrodasyidae. These hypotheses are supported by the phylogenetic relationships of 47 taxa inferred from analyses of the 18S rRNA gene, which found the new species clustering with Thaidasys tongiorgii in a subset of a larger clade containing Macrodasys. Accordingly, the establishment of the following taxa is proposed: Kryptodasys gen. nov., K. marcocurinii sp. nov., K. carlosrochai sp. nov. and K. ulfjondeliusi sp. nov.

sted, utgiver, år, opplag, sider
Nature, 2019
HSV kategori
Identifikatorer
urn:nbn:se:hig:diva-38187 (URN)10.1038/s41598-019-43977-y (DOI)
Tilgjengelig fra: 2022-03-17 Laget: 2022-03-17 Sist oppdatert: 2022-09-15bibliografisk kontrollert
Kånneby, T. & Todaro, M. A. (2017). A new species of Aspidiophorus (Gastrotricha: Chaetonotidae) from the Swedish west coast. Zootaxa, 4290(2), 390-394
Åpne denne publikasjonen i ny fane eller vindu >>A new species of Aspidiophorus (Gastrotricha: Chaetonotidae) from the Swedish west coast
2017 (engelsk)Inngår i: Zootaxa, ISSN 1175-5326, E-ISSN 1175-5334, Vol. 4290, nr 2, s. 390-394Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Gastrotricha is a group of small aquatic acoelomate animals with more than 820 species worldwide (Balsamo et al. 2015). The Swedish gastrotrich fauna today comprises 94 nominal species of which 40 are marine and 54 are freshwater (Curini-Galletti et al. 2012; Kånneby 2011). Of these, 69 species belong to the order Chaetonotida Remane, 1925 and 25 species belong to the order Macrodasyida Remane, 1925. Compared to other relatively well investigated countries in the region, the Swedish marine Gastrotrich fauna of the west coast appears fairly surveyed. In fact, 38 species have been recorded from Norway (Clausen 2004; Schmidt 1972), while 15 species have been recorded from the seas surrounding the Danish mainland (Grilli et al. 2010). The Swedish brackish waters of the Baltic have a lower diversity and so far only 7 species are known from this area (Kånneby 2011; unpublished observations). By comparison, 31 species have been recorded from the Polish Baltic coast (Hummon 2008; Kolicka et al. 2015). In this paper we describe a new species of Aspidiophorus found during an intensive research on the gastrotrich fauna of the surroundings of the Sven Lovén Centre for Marine Sciences (Kristineberg) on the Swedish west coast carried out in the summer of 2009.

sted, utgiver, år, opplag, sider
Magnolia Press, 2017
Emneord
Gastrotricha, Chaetonotidae
HSV kategori
Identifikatorer
urn:nbn:se:hig:diva-38163 (URN)10.11646/zootaxa.4290.2.11 (DOI)
Prosjekter
Swedish marine Gastrotricha
Forskningsfinansiär
The Swedish Taxonomy Initiative (ArtDatabanken, SLU), 440827
Tilgjengelig fra: 2017-09-21 Laget: 2022-03-17bibliografisk kontrollert
Kånneby, T. & Kirk, J. J. (2017). A new species of Redudasys (Gastrotricha: Macrodasyida: Redudasyidae) from the United States. Proceedings of the Biological Society of Washington, 130(1), 128-139
Åpne denne publikasjonen i ny fane eller vindu >>A new species of Redudasys (Gastrotricha: Macrodasyida: Redudasyidae) from the United States
2017 (engelsk)Inngår i: Proceedings of the Biological Society of Washington, ISSN 0006-324X, E-ISSN 1943-6327, Vol. 130, nr 1, s. 128-139Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

A new species of Redudasys (Macrodasyida: Redudasyidae) is described from Texas and Oregon, U.S.A. A single Texas specimen was reported (but not formally described and named) in 2014 from an artesian outflow in Spring Lake, San Marcos, Texas. The Texas specimen provided the first record of Redudasys from outside Brazil. Fifteen specimens were found and studied in 2015 and 2016 from sand pockets among boulders in the Little Nestucca River, near Pacific City, Oregon. Redudasys neotemperatus n. sp. is morphologically and genetically distinguishable from Redudasys fornerise K(isielewski, 1987a), the only formally described species in the genus up until now, and morphologically distinguishable from ‘‘Redudasys sp.’’, an unnamed form reported by Garraffoni et al. in 2010 without genetic information. The Texas and Oregon specimens agree well morphologically and genetically.

sted, utgiver, år, opplag, sider
BioOne, 2017
HSV kategori
Identifikatorer
urn:nbn:se:hig:diva-38164 (URN)10.2988/17-00006 (DOI)
Prosjekter
Marine Swedish Gastrotricha
Tilgjengelig fra: 2017-12-05 Laget: 2022-03-17bibliografisk kontrollert
Hochberg, R., Todaro, M. A., Araujo, T. Q., Atherton, S., Balsamo, M., Chang, C. Y., . . . Perissinotto, R. (2017). A Tribute to William Hummon – Gastrotrich Biologist Extraordinaire. Proceedings of the Biological Society of Washington, 130(1), 113-119
Åpne denne publikasjonen i ny fane eller vindu >>A Tribute to William Hummon – Gastrotrich Biologist Extraordinaire
Vise andre…
2017 (engelsk)Inngår i: Proceedings of the Biological Society of Washington, ISSN 0006-324X, E-ISSN 1943-6327, Vol. 130, nr 1, s. 113-119Artikkel i tidsskrift, Editorial material (Annet vitenskapelig) Published
sted, utgiver, år, opplag, sider
BioOne, 2017
HSV kategori
Identifikatorer
urn:nbn:se:hig:diva-38186 (URN)10.2988/17-00017 (DOI)
Tilgjengelig fra: 2022-03-17 Laget: 2022-03-17 Sist oppdatert: 2022-03-17bibliografisk kontrollert
Kolicka, M., Dabert, M., Dabert, J., Kånneby, T. & Kisielewski, J. (2016). Bifidochaetus, a new Arctic genus of freshwater Chaetonotida (Gastrotricha) from Spitsbergen revealed by an integrative taxonomic approach. Invertebrate systematics, 30(4), 398-419, Article ID IS16001.
Åpne denne publikasjonen i ny fane eller vindu >>Bifidochaetus, a new Arctic genus of freshwater Chaetonotida (Gastrotricha) from Spitsbergen revealed by an integrative taxonomic approach
Vise andre…
2016 (engelsk)Inngår i: Invertebrate systematics, ISSN 1445-5226, E-ISSN 1447-2600, Vol. 30, nr 4, s. 398-419, artikkel-id IS16001Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Gastrotricha is a cosmopolitan phylum of aquatic and semi-terrestrial invertebrates that comprises ~820 described species. To date, freshwater gastrotrichs have not been the subject of faunistic or taxonomic research in the polar regions. In this paper, we present the first species-level description of a freshwater gastrotrich from the Arctic (Svalbard Archipelago). Evidence from morphology, morphometry and molecular analyses reveals that the species represents a new genus in Chaetonotidae: Bifidochaetus arcticus, gen. et sp. nov. Taking into consideration many morphological similarities to Chaetonotus (Primochaetus) veronicae Kånneby, 2013 we propose to include C. (P.) veronicae in the newly established genus under the new combination Bifidochaetus veronicae (Kånneby, 2013), comb. nov. In the phylogenetic analysis based on nuclear 18S rRNA, 28S rRNA and mitochondrial cytochrome c oxidase subunit I sequence data, B. arcticus, gen. et sp. nov. is nested within the family Chaetonotidae, as the sister group to the genus Lepidochaetus Kisielewski, 1991. In this paper we also present new taxonomic characters useful for gastrotrich taxonomy: the pharynx-to-intestine length ratio (I) and the spine bifurcation ratio (B).

sted, utgiver, år, opplag, sider
CSIRO Publishing, 2016
HSV kategori
Identifikatorer
urn:nbn:se:hig:diva-38167 (URN)10.1071/IS16001 (DOI)
Prosjekter
Swedish Marine Gastrotricha
Tilgjengelig fra: 2016-10-19 Laget: 2022-03-17bibliografisk kontrollert
Kånneby, T. (2016). Phylum Gastrotricha (4ed.). In: Thorp, J., Rogers, D.C. (Ed.), Keys to Nearctic Fauna: Thorp and Covich's Freshwater Invertebrates (pp. 115-130). Academic Press
Åpne denne publikasjonen i ny fane eller vindu >>Phylum Gastrotricha
2016 (engelsk)Inngår i: Keys to Nearctic Fauna: Thorp and Covich's Freshwater Invertebrates / [ed] Thorp, J., Rogers, D.C., Academic Press , 2016, 4, s. 115-130Kapittel i bok, del av antologi (Annet vitenskapelig)
sted, utgiver, år, opplag, sider
Academic Press, 2016 Opplag: 4
HSV kategori
Identifikatorer
urn:nbn:se:hig:diva-38181 (URN)10.1016/B978-0-12-385028-7.00007-X (DOI)978-0-12-385028-7 (ISBN)
Tilgjengelig fra: 2016-12-13 Laget: 2022-03-17bibliografisk kontrollert
Sundberg, P., Andrade, S., Bartolomaeus, T., Beckers, P., von Döhren, J., Krämer, D., . . . Strand, M. (2016). The future of nemertean taxonomy (phylum Nemertea) — a proposal [Letter to the editor]. Zoologica Scripta, 45(6), 579-582
Åpne denne publikasjonen i ny fane eller vindu >>The future of nemertean taxonomy (phylum Nemertea) — a proposal
Vise andre…
2016 (engelsk)Inngår i: Zoologica Scripta, ISSN 0300-3256, E-ISSN 1463-6409, Vol. 45, nr 6, s. 579-582Artikkel i tidsskrift, Letter (Fagfellevurdert) Published
HSV kategori
Identifikatorer
urn:nbn:se:hig:diva-38183 (URN)10.1111/zsc.12182 (DOI)
Tilgjengelig fra: 2016-10-19 Laget: 2022-03-17bibliografisk kontrollert
Kånneby, T. (2015). A redescription of Chaetonotus (Primochaetus) veronicae Kånneby, 2013 (Gastrotricha: Chaetonotidae). Zootaxa, 4027(3), 442-446
Åpne denne publikasjonen i ny fane eller vindu >>A redescription of Chaetonotus (Primochaetus) veronicae Kånneby, 2013 (Gastrotricha: Chaetonotidae)
2015 (engelsk)Inngår i: Zootaxa, ISSN 1175-5326, E-ISSN 1175-5334, Vol. 4027, nr 3, s. 442-446Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Gastrotricha are microscopic metazoan animals common to both freshwater and marine environments. A re-examination of Chaetonotus (Primochaetus) veronicae Kånneby, 2013, described from northern Sweden, revealed an important diagnostic character (bifurcated spines) that had been overlooked in the original description (Kånneby 2013).

sted, utgiver, år, opplag, sider
Magnolia Press, 2015
Emneord
Gastrotricha, Chaetonotidae
HSV kategori
Identifikatorer
urn:nbn:se:hig:diva-38166 (URN)10.11646/zootaxa.4027.3.8 (DOI)
Prosjekter
Gastrotricha of Sweden
Forskningsfinansiär
The Swedish Taxonomy Initiative (ArtDatabanken, SLU), 440827
Tilgjengelig fra: 2015-12-02 Laget: 2022-03-17bibliografisk kontrollert
Kånneby, T. & Hochberg, R. (2015). Phylum Gastrotricha (4ed.). In: Thorp, J. and Rogers, D. C. (Ed.), Ecology and General Biology: Thorp and Covich's Freshwater Invertebrates: (pp. 211-223). Academic Press
Åpne denne publikasjonen i ny fane eller vindu >>Phylum Gastrotricha
2015 (engelsk)Inngår i: Ecology and General Biology: Thorp and Covich's Freshwater Invertebrates / [ed] Thorp, J. and Rogers, D. C., Academic Press , 2015, 4, s. 211-223Kapittel i bok, del av antologi (Annet vitenskapelig)
sted, utgiver, år, opplag, sider
Academic Press, 2015 Opplag: 4
Emneord
Gastrotricha
HSV kategori
Identifikatorer
urn:nbn:se:hig:diva-38182 (URN)9780123850263 (ISBN)
Tilgjengelig fra: 2014-09-26 Laget: 2022-03-17bibliografisk kontrollert
Kånneby, T. & Todaro, M. A. (2015). The phylogenetic position of Neogosseidae (Gastrotricha: Chaetonotida) and the origin of planktonic Gastrotricha. Organisms Diversity & Evolution, 15(3), 459-469
Åpne denne publikasjonen i ny fane eller vindu >>The phylogenetic position of Neogosseidae (Gastrotricha: Chaetonotida) and the origin of planktonic Gastrotricha
2015 (engelsk)Inngår i: Organisms Diversity & Evolution, ISSN 1439-6092, E-ISSN 1618-1077, Vol. 15, nr 3, s. 459-469Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Planktonic forms of Gastrotricha have been known since the 1850s, despite the fact that they are rather uncommon and difficult to collect. They are characterized by a round sack-shaped body, an absence of furcal adhesive tubes, and a different distribution of the locomotory ciliation compared to epibenthic and periphytic gastrotrichs. Today, planktonic gastrotrichs are classified into the three taxa—Dasydytidae, Neogosseidae, and Undula—but their origin and whether they share a recent common ancestor remain largely unknown. A long-held view is that planktonic taxa are derived from benthic ancestors related to Chaetonotus (Zonochaeta), but the hypothesis has never been properly tested. Here, in order to elucidate the phylogeny and origin of planktonic Gastrotricha, we provide the first molecular data on the very rare genera Kijanebalola and Neogossea, both members of the family Neogosseidae. We use Bayesian and maximum likelihood phylogenetics to analyze sequences of 18S rDNA, 28S rDNA, and COI mtDNA spanning 71 taxa in total. We find high support for a common origin of planktonic gastrotrichs, with monophyly of both Dasydytidae and Neogosseidae. Planktonic forms have evolved from epibenthic or periphytic ancestors, and the closest extant clade comprises members of Chaetonotus (Zonochaeta) + Chaetonotus heteracanthus Remane, 1927. These results further imply that the motile spines and underlying muscle patterns that control them in species of Dasydytidae are adaptations to the planktonic environment that evolved independently of those in other species of Gastrotricha.

sted, utgiver, år, opplag, sider
Springer Berlin/Heidelberg, 2015
Emneord
Meiofauna, Freshwater, Planktonic, Phylogeny, Paucitubulatina
HSV kategori
Identifikatorer
urn:nbn:se:hig:diva-38184 (URN)10.1007/s13127-015-0223-9 (DOI)
Prosjekter
Gastrotricha of Sweden
Forskningsfinansiär
The Swedish Taxonomy Initiative (ArtDatabanken, SLU), 440827
Tilgjengelig fra: 2015-12-02 Laget: 2022-03-17bibliografisk kontrollert
Organisasjoner
Identifikatorer
ORCID-id: ORCID iD iconorcid.org/0000-0001-7151-5915