Water bear with barbels of a catfish: A new Asian Cornechiniscus (Heterotardigrada: Echiniscidae) illuminates evolution of the genus

Gąsiorek, Piotr

doi:10.1016/j.jcz.2022.06.007

Cited by 3 publications

(1 citation statement)

References 36 publications

(51 reference statements)

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“…Although faunistic studies on the tardigrade fauna of Kyrgyzstan are rather scarce, several of them undertaken in the past two decades have made a considerable contribution to the taxonomy of Tardigrada. This is mainly due to the discovery of taxa new from this region, namely: Isohypsibius borkini Tumanov, 2003 [ 7 ], Mesobiotus barabanovi Tumanov, 2005 [ 8 ], Macrobiotus kirghizicus Tumanov, 2005 [ 8 ], Milnesium asiaticum Tumanov, 2006 [ 9 ] and Milnesium reductum Tumanov, 2006 [ 9 ], Tenuibiotus danilovi (Tumanov, 2007) [ 10 ], Tenuibiotus tenuiformis (Tumanov, 2007) [ 10 ], Mesobiotus skorackii Kaczmarek, Zawierucha, Buda, Stec, Gawlak, Michalczyk & Roszkowska, 2018 [ 11 ], Macrobiotus caelestis Coughlan, Michalczyk & Stec, 2019 [ 12 ], Cornechiniscus imperfectus Gąsiorek & Michalczyk 2020 [ 13 ], Cornechiniscus mystacinus Gąsiorek, 2022 [ 14 ], and a new genus being created with the discovery of Cryoconicus kaczmareki Zawierucha, Stec, Lachowska-Cierlik, Takeuchi, Z. Li & Michalczyk, 2018 [ 15 ]. Importantly, other studies have rediscovered and noted previously described species such as Ramazzottius cf.…”

Section: Introductionmentioning

confidence: 99%

Macrobiotus rebecchii sp. nov.: A New Limno-Terrestrial and Hermaphroditic Tardigrade from Kyrgyzstan

Stec

2022

Animals

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A new tardigrade species of the genus Macrobiotus C.A.S. Schultze, 1834 from Kyrgyzstan, is described and illustrated in this paper. Macrobiotus rebecchii sp. nov. is a hermaphroditic and limnoterrestrial species found in a moss growing on a rock in Toluk village. Specimens of the new species were examined for its morphological details using contrast phase light microscope (PCM) and scanning electron microscope (SEM). Genetic data in the form of DNA sequences of commonly used molecular markers were also obtained (18S rRNA, COI). Phenotypically the new species is most similar to Macrobiotus joannae Pilato & Binda, 1983, Macrobiotus punctillus Pilato, Binda & Azzaro, 1990, and Macrobiotus hannae Nowak & Stec, 2018, but can be easily differentiated from all of them by its body granulation pattern.

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Section: Introductionmentioning

confidence: 99%

Macrobiotus rebecchii sp. nov.: A New Limno-Terrestrial and Hermaphroditic Tardigrade from Kyrgyzstan

Stec

2022

Animals

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Molting in early Cambrian armored lobopodians

Chen,

Vannier,

Guo

et al. 2024

Commun Biol

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Lobopodians represent a key step in the early history of ecdysozoans since they were the first animals to evolve legs within this clade. Their Cambrian representatives share a similar body plan with a typically cylindrical annulated trunk and a series of non-jointed legs. However, they do not form a monophyletic group and likely include ancestors of the three extant panarthropod lineages (Tardigrada, Onychophora, Euarthropoda). Some species display astonishing protective devices such as cuticular plates and spines. We describe here the armor and molting process of Microdictyon from the early Cambrian of China. Microdictyon secreted ovoid paired cuticular sclerites that were duplicated in a non-synchronous way along the animal’s body. The reticulated pattern and cuticular architecture of these sclerites have similarities to extant armored tardigrades that recently served in hypothesizing that tardigrades are possibly miniaturized lobopodians. Ecdysis and hard cuticular protection are now well documented in the whole spectrum of early Cambrian ecdysozoans such as soft-bodied scalidophorans, lobopodians and fully articulated euarthropods. We hypothesize that the secretion of sclerotized cuticular elements periodically renewed via ecdysis was a key innovation that opened large-scale evolutionary opportunities to invertebrate animal life, specifically ecdysozoans, both in terms of anatomical functionalities and ecological success.

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Actual State of Knowledge of the Limno-Terrestrial Tardigrade Fauna of the Republic of Argentina and New Genus Assignment for Viridiscus rufoviridis (du Bois-Reymond Marcus, 1944)

et al. 2023

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Limno-terrestrial tardigrades of Argentina had been studied starting in 1908 and for a long time by European researchers, most frequently in the Patagonian region (incl. the Land of Fire). Starting during the 1980s, Claps, Rossi and collaborators published many surveys, studying other regions also, but with taxonomic criteria at that time. Since the 2000s, methodical and continuous studies using more modern criteria, have been carried out at the National University of La Pampa, contributing to the faunistic, taxonomic and ecological knowledge (including new species descriptions). This paper provides a comprehensive list of the limno-terrestrial tardigrade fauna reported from Argentina, with pertinent evaluations, owing to a careful study of every pertinent piece of literature since 1908, also solving some problems of discordance between the main past checklists. Summarizing, 39 genera and 119 species are present; of these, 72 represent records accepted by the literature, while 47 are records questioned in the literature but which represent distinct taxa surely present in Argentina; 14 additional taxa, instead, are clearly dubious. The authors also report the correct genus assignment to Viridiscus rufoviridis (du Bois-Reymond Marcus, 1944), which now becomes Barbaria rufoviridis comb. nov.

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Water bear with barbels of a catfish: A new Asian Cornechiniscus (Heterotardigrada: Echiniscidae) illuminates evolution of the genus

Cited by 3 publications

References 36 publications

Macrobiotus rebecchii sp. nov.: A New Limno-Terrestrial and Hermaphroditic Tardigrade from Kyrgyzstan

Macrobiotus rebecchii sp. nov.: A New Limno-Terrestrial and Hermaphroditic Tardigrade from Kyrgyzstan

Molting in early Cambrian armored lobopodians

Actual State of Knowledge of the Limno-Terrestrial Tardigrade Fauna of the Republic of Argentina and New Genus Assignment for Viridiscus rufoviridis (du Bois-Reymond Marcus, 1944)

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