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Hypsibius cf. scabropygus Cuénot, 1929: 6 bucco-pharyngeal apparatus (dorso-ventral projection, ventral placoids in the insert) 7 claws IV (arrow indicates a small cuticular bar near the posterior claw). (Both PCM).
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AbstractIn sixteen moss, lichen and mixed (moss/lichen) samples, collected from Estonia, Latvia and Lithuania, 291 specimens, 48 simplexes, including one exuvium with 6 eggs, and 8 free-laid eggs of eutardigrades were found. In total, 17 species, together with one new to science, were identified (all are new records for the Baltic states): Astatume...
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Context 1
... of the Hypsibius type, internal claws much smaller and of a different shape than the external claws (Fig. 7). All main branches with large accessory points. Smooth, indistinct areoles under claws usually visible only on posterior claws IV. Cuticular bars under claws I-III absent but a small bar is present near the posterior claw IV (Fig. 7, ...Context 2
... of the Hypsibius type, internal claws much smaller and of a different shape than the external claws (Fig. 7). All main branches with large accessory points. Smooth, indistinct areoles under claws usually visible only on posterior claws IV. Cuticular bars under claws I-III absent but a small bar is present near the posterior claw IV (Fig. 7, ...Similar publications
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Citations
... Cuénot, 1929 [52] 2B (1); 61B (1) Species with wide Holarctic distribution [38][39][40]. The original description is uncertain and the species needs a modern redescription [53]. Species new for the Polish fauna. ...
In this paper, samples of mosses, lichens and cryptogams (mosses mixed with lichens) collected from Słowiński National Park (northern Poland) were studied for water bears (Tardigrada). In total, 27 tardigrade taxa were identified: 21 to the species level, one identified as „cf.” and three to the genus level, with six species (Eremobiotus ginevrae, Hypsibius dujardini, Hypsibius scabropygus, Milnesium beasleyi, Minibiotus intermedius and Notahypsibius pallidoides) being new records for Poland. Two possibly new for science species were also found, belonging to genera Diphascon and Mesobiotus. Additionally, a very rare eutardigrade Pseudohexapodibius degenerans has been found in the samples analyzed in the present study for the first time outside of the type locality. The effects of habitat and substrate on species richness were also investigated and showed no significant differences between mosses and lichens, as well as all substrates except for concrete walls.
... Because of similarities between Hypsibius scabropygus Cuénot, 1929 andH. stillifer Abe, 2004 and the need for a modern redescription of both taxa Zawierucha et al. 2014), reference herein is to H. cf. scabropygus. ...
Tardigrades are a phylum of microscopic invertebrates with a global distribution. Although our understanding of their systematic position and taxonomy has increased and continues to grow,
their relationship with the other organisms that share their habitat remains poorly studied. One such organism is Propyxidium tardigradum, a peritrich ciliate which uses tardigrades for
dispersion and as a substrate for reproduction. Here, we present the first Scottish record and tenth global occurrence of Propyxidium tardigradum, thereby expanding our knowledge of its
poorly understood zoogeographic distribution. We also summarise the literature concerning P. tardigradum biology, proffer hypotheses regarding the Propyxidium-tardigrade relationship,
and the apparent lack of heterotardigrade ciliate infestation. Additionally, we indicate a number of recommendations for the direction of future studies regarding the ciliate. Finally, we add a
further three species, Milnesium variefidum, Hypsibius cf. scabropygus and Macrobiotus scoticus to the list of Propyxidium host species.
... Cuénot, 1929 has the type locality in France and it is known mainly from European localities, but is recorded also from Africa, Asia and North America (McInnes 1994;Mcinnes et al. 2017). Some possible taxonomic confusion regarding this species was discussed by Zawierucha et al. (2014). In our study, only one damaged specimen was found, making the final identification impossible. ...
In this paper, samples of mosses and lichens collected from Ivohibory Forest (south-central Madagascar) were studied in search for tardigrades. In total, 39 tardigrade taxa were identified, 21 of which are new records for Madagascar. Moreover, one of these is a new species for science. Bryodelphax beniowskii sp. nov., described here based on morphological analysis. It is most similar to Bry. olszanowskii and Bry. parvuspolaris, but differs from them mainly by ventral plates arrangement and some other morphometric characters.
... The genus Notahypsi bius Tumanov, 2020 was established for the species origi nally described as Hypsibius pallidoides Pilato, Kiosya, Lisi, Inshina et Biserov, 2011 and for two morphologically similar species, because the molecular phylogenetic analysis revealed an affinity of N. pallidoides to the subfamily Pilato biinae (Tumanov, 2020). A complex of species simi lar to H. scabropygus Cuénot, 1929 seems to be distinct from the "typical" Hypsibius species both morphologically and in the molecular phylogenetic analysis, and may have to be excluded from this genus (Zawierucha et al., 2014;Gąsiorek et al., 2018a;Tumanov, 2020). ...
... A recent integrative redescription of the type species Hypsibius dujardini (Doyère, 1840) (Gąsiorek et al., 2018a) provides a solid basis for a broad investigation of the actual diversity of the "dujardini group". It seems to be, in fact, a large complex of closely related (semi)cryptic species widely distributed worldwide (McInnes, 1994;Kaczmarek et al., 2014Kaczmarek et al., , 2015McInnes et al., 2017). ...
A new species of tardigrade from the genus Hypsibius Ehrenberg, 1848 is described from the bottom sediments of a small lake in the central part of Scandinavian Peninsula (Sweden), using an integrative approach, i.e. morphological techniques (light and scanning electron microscopy) combined with a molecular analysis (18S rRNA, 28S rRNA, ITS-2 and COI markers). Hypsibius repentinus sp. nov. belongs to the Hypsibius dujardini species–group and differs from the most similar species of this group in having a second macroplacoid with a definite constriction and in some other morphometric characters. Morphological diagnosis for the Hypsibius dujardini species–group is proposed, and its composition is discussed.
... minimus Bartels, Nelson, Kaczmarek and Michalczyk, 2008 [83] were reported from the caves in the Great Smoky Mountains National Park in North America. In 2008, Minibiotus formosus Zawierucha, Dziamięcki, Jakubowska, Michalczyk and Kaczmarek, 2014 [84] has been collected from Gutmana Cave in the Gauja National Park [84]. In addition, Bartels et al. [85] described Mac. ...
... minimus Bartels, Nelson, Kaczmarek and Michalczyk, 2008 [83] were reported from the caves in the Great Smoky Mountains National Park in North America. In 2008, Minibiotus formosus Zawierucha, Dziamięcki, Jakubowska, Michalczyk and Kaczmarek, 2014 [84] has been collected from Gutmana Cave in the Gauja National Park [84]. In addition, Bartels et al. [85] described Mac. ...
Tardigrades have been occasionally studied in Turkey since 1973. However, species number and distribution remain poorly known. In this study, distribution of Tardigrades in the province of Karabük, which is located in northern coast (West Black Sea Region) of Turkey, was carried out. Two moss samples were collected from the entrance of the Bulak (Mencilis) Cave. A total of 30 specimens and 14 eggs were extracted. Among the specimens; Echiniscus granulatus (Doyère, 1840) and Diaforobiotus islandicus islandicus (Richters, 1904) are new records for Karabük. Furthermore, this study also provides a current checklist of tardigrade species reported from Turkey, indicating their localities, geographic distribution and taxonomical comments.
... The cuticular bars of the Irish and Scottish specimens appear identical to those seen on figures of specimens identified as H. cf. scabropygus by Zawierucha et al. (2014) from Latvia and Estonia and similar to those described by Ciobanu et al. (2014) on the same taxon reported from Romania. The former authors considered the possibilities that Cuénot and later authors (e.g. ...
... One specimen similarly matching the above-mentioned descriptions was also reported from moss on soil by Zawierucha et al. (2014) from Latvia. The species was previously recorded from beech leaf litter in Denmark (Hallas & Yeates, 1972) and Italy (Guidetti et al., 1999) and from leaf litter in New Guinea (Iharos, 1973). ...
The findings of an investigation of the tardigrade fauna associated with beech (Fagus sylvatica) leaf litter in the Republic of Ireland and Scotland are reported. The present study is the first to specifically target this microhabitat in either country. Tardigrades were extracted from 16 samples of leaf litter obtained from seven locations (one in Ireland and six in Scotland). Twenty five tardigrade taxa were encountered including seven that represent new records for the Republic of Ireland (Pseudechiniscus sp. nov., Diphascon pingue group sp., Hypsibius cf. convergens, Hypsibius cf. scabropygus, Itaquascon cf. globuliferum, Ursulinius sp. nov., and Minibiotus sp. nov.) and four for Scotland (Bertolanius weglarskae, Hypsibius cf. scabropygus, Adropion belgicae and Pilatobius ramazzottii). The collection of several taxa that either represent new records or undescribed species within a small number of samples demonstrates the importance for researchers to include leaf litter when assessing and reporting the tardigrade biodiversity of an area.
... However, the 18S rRNA hypsibiid and the COI hypsibiin phylogenetic trees clearly indicate Hypsibius is polyphyletic, which is in agreement with the results obtained by Bertolani et al. (2014). For example, H. scabropygus (which probably represents a species complex; Zawierucha et al. 2014), appeared as the sister taxon to other Hypsibiinae in the 18S rRNA analysis, and shares many important taxonomic traits with the genus Ramazzottius, i.e. has two granular macroplacoids, elongated primary branches of posterior claws, and sculptured dorso-caudal cuticle. Furthermore, H. klebelsbergi, inferred as the sister group to Borealibius + Hypsibius s.s. ...
A laboratory strain identified as "Hypsibius dujardini" is one of the best studied tardigrade strains: it is widely used as a model organism in a variety of research projects, ranging from developmental and evolutionary biology through physiology and anatomy to astrobiology. Hypsibius dujardini, originally described from the Île-de-France by Doyère in the first half of the 19 th century, is now the nominal species for the superfamily Hypsibioidea. The species was traditionally considered cosmopolitan despite the fact that insufficient, old and sometimes contradictory descriptions and records prevented adequate delineations of similar Hypsibius species. As a consequence, H. dujardini appeared to occur globally, from Norway to Samoa. In this paper, we provide the first integrated taxonomic redescription of H. dujardini. In addition to classic imaging by light microscopy and a comprehensive morphometric dataset, we present scanning electron photomi-crographs, and DNA sequences for three nuclear markers (18S rRNA, 28S rRNA, ITS-2) and one mitochondrial marker (COI) that are characterised by various mutation rates. The results of our study reveal that a commercially available strain that is maintained in many laboratories throughout the world, and assumed to represent H. dujardini sensu stricto, represents , in fact, a new species: H. exemplaris sp. nov. Redescribing the nominal taxon for Hypsibiidae, we also redefine the family and amend the definitions of the subfamily Hypsibiinae and the genus Hypsibius. Moreover, we transfer H. arcticus (Murray, 1907) and Hypsibius conifer Mihelčič, 1938 to the genus Ramazzottius since the species exhibit claws and eggs of the Ramazzottius type. Finally, we designate H. fuhrmanni as subjectively invalid because the extremely poor description precludes identifying neotype material.
... 12. Hyp. scabropygus Cuénot, 1929 89 (1) Species with wide Holarctic distribution (McInnes, 1994); however, the original description is uncertain and the species need a modern redescription (see Zawierucha et al., 2014). Species new for the Polish fauna. ...
In this paper, samples of mosses and lichens collected from Bory Tucholskie National Park, Zaborski Landscape Park, and their surroundings (Pomerania Province, northern Poland) were studied for water bears (Tardigrada). In total, 38 tardigrade taxa were identified and six of them (Hypsibius cf. allisoni, Hyp. scabropygus, Macrobiotus sottilei, Milnesium beasleyi, Mil. dornensis, and Mil. granulatum) are new records for the Polish fauna. Eighteen taxa (only 14 identified to the species level) were found in Bory Tucholskie National Park, whereas in Zaborski Landscape Park this number was much larger, i.e. 28 taxa (including 22 identified to the species level), as well as in the areas surrounding the parks, i.e. 28 (including 23 identified to the species level). It should be also noted that the effect of substrate, habitat, and types of environmental protection on species richness was not statistical significant.
... Species with wide European distribution, but also recorded from other localities. Some possible taxonomic confusion regarding this species were discussed byZawierucha et al. (2014), who suggest some H. scabropygus records may belong to other species. ...
This paper is the fourth monograph in a series that describes the global records of limno-terrestrial water bears (Tardigrada). Here, we provide a comprehensive list of non-marine tardigrades recorded from Africa, providing an updated and revised taxonomy accompanied by geographic co-ordinates, habitat, and biogeographic comments. It is hoped this work will serve as a reference point and background for further zoogeographical and taxonomical studies.
... The body consists of head, three body segments with a pair of legs each, and the posterior consists of four pair of legs. [10] [14] The legs have no joints while their feet have four to eight claws each. The cuticle contains chitin and protein and are moulted periodically. ...
... They are eutelic in nature, meaning all the adult Tardigrades of the same species have the same number of cells. [10] [12][13] [14] The tardigrades typically have two eyespots on its head, each consisting of five or six cells, and one or more pairs of sensory bristles located on head and other regions of the body. [15] Its legs are hollow and each of them end in 1 to 12 toes tipped with claws or adhesive paddings. ...
Tardigrades popularly known as water bears are micrometazoans with four pairs of lobopod legs. They are the organisms which can live in extreme conditions and are known to survive in vacuum and space without protection. Tardigardes survive in lichens and mosses, usually associated with water film on mosses, liverworts, and lichens. More species are found in milder environments such as meadows, ponds and lakes. They are the first known species to survive in outer space. Tardigrades are closely related to Arthropoda and nematodes based on their morphological and molecular analysis. The cryptobiosis of Tardigrades have helped scientists to develop dry vaccines. They have been applied as research subjects in transplantology. Future research would help in more applications of tardigrades in the field of science.
