The Deep-Sea Genus Coronarctus (Tardigrada, Arthrotardigrada) in Brazil, South-Western Atlantic Ocean, with the Description of Three New Species

Gomes-Júnior, Edivaldo; Santos, Érika; Rocha, Clélia Márcia Cavalcanti da; Santos, Paulo Jorge Parreira dos; Fontoura, Paulo

doi:10.3390/d12020063

Cited by 7 publications

(6 citation statements)

References 27 publications

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“…Tardigrade taxonomy followed Guil et al, 2019 [18], and Degma et al, 2009Degma et al, -2022, and morphological terminology followed Møbjerg et al, 2018 [19]. The identification and differentiation of the new species were conducted using the key by Gomes-Júnior et al, 2019 [12], for the genus Coronarctus; the key by Fujimoto and Hansen, 2019 [10], for the genus Angursa; and the original descriptions of all valid species of genera Angursa, Coronarctus, and Moebjergarctus. Abbreviations for the names of genera are given according to Perry et al, 2019 [20].…”

Section: Methodsmentioning

confidence: 99%

“…manganis Bussau, 1992 [23], and Moe. clarionclippertonensis Bai, Wang, Zhou, Lin, Meng, Fontoura, 2020 [12]. However, Moebjergarctus okhotensis sp.…”

Section: Differential Diagnosismentioning

confidence: 99%

“…Deep-sea species (reported deeper than 200 m) make up only ca. 20 percent of the known diversity of marine tardigrades [5,[10][11][12][13]. Data on tardigrade fauna are almost absent in some regions of the world ocean.…”

Section: Introductionmentioning

confidence: 99%

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Deep-Sea Tardigrades from the North-Western Pacific, with Descriptions of Two New Species

et al. 2022

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Three deep-sea tardigrade species were identified from the sediment samples collected during the four German–Russian joint deep-sea cruises that were conducted in the North-Western Pacific: Coronarctus sonne sp. nov., Moebjergarctus okhotensis sp. nov., and Angursa cf. bicuspis. Specimens of those species were collected at depths between 1700 and 5410 m. The new species Coronarctus sonne sp. nov. belongs to the Cor. tenellus group of species on the basis of morphological traits such as the short cephalic appendages and heteromorphic claws. The structure of the secondary clavae and two points, with an accessory point and a primary point simultaneously on the internal and external claws on legs IV, are significant characteristics distinguishing Coronarctus sonne sp. nov. from other described species. Moebjergarctus okhotensis sp. nov. is characterized by having cephalic cirri with the long smooth portion of the scapus and annulated scapus only in the basal portion, the structure of the male and female reproductive system, and differences in the sizes of some structures compared to the other described species. An analysis of the results of four deep-sea expeditions indicates a patchy distribution of tardigrades in the North-Western Pacific.

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Section: Methodsmentioning

confidence: 99%

“…manganis Bussau, 1992 [23], and Moe. clarionclippertonensis Bai, Wang, Zhou, Lin, Meng, Fontoura, 2020 [12]. However, Moebjergarctus okhotensis sp.…”

Section: Differential Diagnosismentioning

confidence: 99%

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Deep-Sea Tardigrades from the North-Western Pacific, with Descriptions of Two New Species

et al. 2022

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“…This study increases the diversity estimation of both the South China Sea and the Pacific Ocean. To date, only 51 tardigrade species from 23 genera have been recorded from the deep sea (> 200 m depth), including the deep sublittoral and abyssal zones (Kaczmarek et al, 2015;Gomes-Juńior et al, 2020;Hansen and Kristensen, 2020;Degma et al, 2009Degma et al, -2023Saulenko et al, 2022). Eleven genera and 17 species from the South China Sea accounted for 48% of the recorded deep-sea genera and 33% of the recorded deep-sea species.…”

Section: Biodiversity Of the Marine Tardigrade Communitiesmentioning

confidence: 99%

Preliminary studies of the tardigrada communities from a polymetallic nodule area of the deep South China Sea

et al. 2023

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Knowledge about marine tardigrades from the South China Sea is very scarce, with only four species from shallow waters recorded to date. The present study investigated the structure and diversity of tardigrade communities from the deep sea (1517-1725 m) at 8 stations in a polymetallic nodule area of the northern South China Sea. A total of 151 arthrotardigrades were collected belonging to 11 genera (Angursa, Batillipes, Coronarctus, Euclavarctus, Exoclavarctus, Halechiniscus, Moebjergarctus, Raiarctus, Rhomboarctus, Tanarctus and Tholoarctus), representing 17 species. Two Angursa species (Angursa sp. 4 and Angursa sp. 3) were the most abundant (25.2% and 14.6%, respectively), followed by Moebjergarctus sp. (13.9%). Specimens were mostly (90.7%) distributed in the upper layer of the sandy-mud sediment (0-1 cm). The SIMPROF test showed that the composition of tardigrade communities at all stations was not significantly different. At different stations, the number of species, Shannon-Wiener diversity index and Pielou’s evenness index ranged from 4 to 10, 1.94 to 2.87, and 0.75 to 1.00, respectively. The average taxonomic distinctness (Δ+) ranged from 72.50 to 90.00, and the variation in taxonomic distinctness (Λ+) ranged from 316.67 to 1181.25. This study provides some basic information about the biodiversity of the marine tardigrade community in the South China Sea.

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“…Gomes-Júnior et al [16] studied deep sea (between 150 and 3000 m bsl) tardigrades of the genus Coronarctus Renaud-Mornant [17] from the south-western Atlantic Ocean and described three species new for science. The authors also discussed the most important morphological characters in the genus and presented identification key to all known Coronarctus species [16].…”

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confidence: 99%

Final Note of Special Issue “Tardigrades Taxonomy, Biology and Ecology”

Kaczmarek

2020

Diversity

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Tardigrada (water bears) are microscopic invertebrates inhabiting aquatic (freshwater and marine) and terrestrial habitats. They are thriving in almost all Earth ecosystems from deepest oceans to highest mountains, from tropics to polar regions. Water bears are probably most famous for their cryptobiotic abilities, which allow them to survive a broad spectrum of extreme environmental conditions. The Special Issue on tardigrades was launched to popularize research on these fascinating microinvertebrates. The published papers were focused on (a) marine and terrestrial tardigrades diversity, (b) interpopulation variability of Antarctic eutardigrade Paramacrobiotus fairbanksi, (c) encystment in freshwater eutardigrade Thulinius ruffoi and (d) use of a metabarcoding approach to community structures studies in microenvironments.

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The Deep-Sea Genus Coronarctus (Tardigrada, Arthrotardigrada) in Brazil, South-Western Atlantic Ocean, with the Description of Three New Species

Cited by 7 publications

References 27 publications

Deep-Sea Tardigrades from the North-Western Pacific, with Descriptions of Two New Species

Deep-Sea Tardigrades from the North-Western Pacific, with Descriptions of Two New Species

Preliminary studies of the tardigrada communities from a polymetallic nodule area of the deep South China Sea

Final Note of Special Issue “Tardigrades Taxonomy, Biology and Ecology”

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