Revision of Angursa (Arthrotardigrada: Styraconyxidae) with the description of a new species from Japan

Fujimoto, Shinta; Hansen, Jesper Guldberg

doi:10.5852/ejt.2019.510

Cited by 974 publications

(4 citation statements)

References 15 publications

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“…Additionally, one of the seven known Coronarctus species, C. verrucatus, was collected at depths between 249-260 m from Faroe Islands, European Atlantic (Hansen 2007). With increased sampling the zonal distribution of Coronarctus could prove to be more similar to that of Angursa Pollock, 1979, which has been recorded from the shallow subtidal to abyssal zones (Fujimoto and Hansen 2019).…”

Section: Discussionmentioning

confidence: 99%

First records of marine tardigrades of the genus Coronarctus (Tardigrada, Heterotardigrada, Arthrotardigrada) from Mexico

Pérez-Pech¹,

Hansen²,

DeMilio³

et al. 2020

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Deep-water sampling in the Perdido Fold Belt, Gulf of Mexico, Mexican Economic Exclusive Zone yielded five specimens of tardigrades belonging to the genus Coronarctus Renaud-Mornant, 1974. The specimens represent the first records of the genus for Mexico. Two two-clawed larvae and two four-clawed larvae of Coronarctus mexicus Romano, Gallo, D'Addabbo, Accogli, Baguley & Montagna, 2011 and a single four-clawed larval specimen of an undescribed Coronarctus species were identified. Taxonomic analysis of the specimens contributed to the knowledge of deep-sea and Mexican marine tardigrades, two data-poor areas of study.

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Section: Discussionmentioning

confidence: 99%

First records of marine tardigrades of the genus Coronarctus (Tardigrada, Heterotardigrada, Arthrotardigrada) from Mexico

Pérez-Pech¹,

Hansen²,

DeMilio³

et al. 2020

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“…Data on tardigrade fauna are almost absent in some regions of the world ocean. Thus, only one species is known from the deepsea ecosystems of the North-Western Pacific Ocean (NWPO): Angursa seisuimaruae Fujimoto and Hansen, 2019 [14]. However, tardigrades are recorded in the deep-sea meiofauna of this region [6,15].…”

Section: Introductionmentioning

confidence: 99%

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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“…On the other hand, the new taxon and Tetrakentron have similar secondary clavae morphology and they both have their seminal receptacles opening anterior to their gonopores (Kristensen and Hansen 2005). It is also noteworthy that these two taxa, as well as Angursa, have a terminal anus (Kristensen and Hansen 2005;Fujimoto and Hansen 2019). Whether these morphological similarities between the new taxon and Tetrakentron are phylogenetic signals or not need to be verified with molecular data.…”

Section: Diagnosismentioning

confidence: 98%

A new marine tardigrade genus and species (Arthrotardigrada, Styraconyxidae) with unique pockets on the legs

Fujimoto¹,

Jimi²

2020

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A marine heterotardigrade Cyaegharctus kitamuraigen. et sp. nov. (Arthrotardigrada, Styraconyxidae) is described from Daidokutsu, a submarine cave off Iejima island, Okinawa Islands, Ryukyu Archipelago, Japan. It is easily distinguished from all other styraconyxids by its pocket organs (putative sensory structures) on all legs in addition to the usual leg sensory organs. Its combination of other character states, such as the dorso-ventrally flattened body, ovoid primary clavae, conical secondary clavae, large terminal anus, internal digits with proximal pads and peduncles, external digits with developed peduncles and all digits with three-pointed claws in adult female, supports the erection of a new genus and species.

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Revision of Angursa (Arthrotardigrada: Styraconyxidae) with the description of a new species from Japan

Cited by 974 publications

References 15 publications

First records of marine tardigrades of the genus Coronarctus (Tardigrada, Heterotardigrada, Arthrotardigrada) from Mexico

First records of marine tardigrades of the genus Coronarctus (Tardigrada, Heterotardigrada, Arthrotardigrada) from Mexico

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

A new marine tardigrade genus and species (Arthrotardigrada, Styraconyxidae) with unique pockets on the legs

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