• Animal cells and systems
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• v.1 no.3
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• pp.419-423
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• 1997

Two new marine tardigrades, florarctus kwoni n. sp. and Batillipes philippinensis n. sp. belonging to Halechiniscidae and Batillipedidae, respectively, are described on the basis of the specimens sieved from sublittoral coral sands and shell gravels of Palawan Island, the Philippines. florarctus kwoni n. sp. is characterized by the rocket-shaped aliform expansion, with the distal margin of posterior ala flattened. Batillipes philippinensis n. sp. closely resembles B. similis Schulz, 1955 and B. annulatus De Zio, 1962. However, it is clearly discernible from the former by the shape of lateral body projection between leg III and leg IV, and the relative length of cirrus E and the spine on leg IV, and from the latter by the shape of the lateral body projection and the clavar shape. This is the first report of the marine tardigrades from the Philippines.

• Animal Systematics, Evolution and Diversity
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• v.5 no.2
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• pp.159-171
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• 1989

Tardigrades were collected in freshwater habitats, such as rivers, streams , lakes , ponds and rice paddies at 19 different localities in Korea, during the period of May 1986 -January 1988, and seven species were identified. Dactylobiotus dispar, Macrobiotus hufellandi, M. richtersi, Hypsibius convergnes, H. dujardini, Isohypsibius granulifer, and Pseudobiotus megalonix, Five species of these except D. disparand H. dujardini, are new to Korea, which are fully described and illustrated.

• Molecules and Cells
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• v.24 no.3
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• pp.351-357
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• 2007

Regions (about 3.7-3.8 kb) of the mitochondrial genomes (rrnL-cox1) of two tardigrades, a heterotardigrade, Batillipes pennaki, and a eutardigrade, Pseudobiotus spinifer, were sequenced and characterized. The gene order in Batillipes was $\underline{rrnL}-\underline{V}-\underline{rrnS}-\underline{Q}-\underline{I}$-M-nad2-W-$\underline{C}-\underline{Y}$-cox1, and in Pseudobiotus it was $\underline{rrnL}-\underline{V}-\underline{rrnS}-\underline{Q}$-M-nad2-W-$\underline{C}-\underline{Y}$-cox1. With the exception of the trnI gene, the two tardigrade regions have the same gene content and order. Their gene orders are strikingly similar to that of the chelicerate Limulus polyphemus (rrnL-V-rrnS-CR-I-Q-M-nad2-W-C-Y-cox1), which is considered to be ancestral for arthropods. Although the tardigrades do not have a distinct control region (CR) within this segment, the trnI gene in Pseudobiotus is located between rrnL-trnL1 and trnL2-nad1, and the trnI gene in Batillipes is located between trnQ and trnM. In addition, the 106-bp region between trnQ and trnM in Batillipes not only contains two plausible trnI genes with opposite orientations, but also exhibits some CR-like characteristics. The mitochondrial gene arrangements of 183 other protostomes were compared. 60 (52.2%) of the 115 arthropods examined have the M-nad2-W-C-Y-cox1 arrangement, and 88 (76.5%) the M-nad2-W arrangement, as found in the tardigrades. In contrast, no such arrangement was seen in the 70 non-arthropod protostomes studied. These are the first non-sequence molecular data that support the close relationship of tardigrades and arthropods.

• Proceedings of the Zoological Society Korea Conference
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• 1997.04a
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• pp.63.2-63
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• 1997

No Abstract, See Full Text

• Animal Systematics, Evolution and Diversity
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• v.7 no.2
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• pp.225-232
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• 1991

Five species of tardigrades collected from mosses and lichens at different localities in Korea are described , all of which are newly known to Korea : Cornechiniscus lobatus, Pseudechiniscus junitae; Hypsibius microps. Diphascon prosirostre,Itaquascon trinacriae.

• Animal Systematics, Evolution and Diversity
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• v.18 no.1
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• pp.91-98
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• 2002

Two marine tardigrades belonging to the genus Halechiniscus Richters, H. jejuensis n. sp. and H. remanei Schulz are recorded from Jeju Island, Korea. Halechiniscus jejuensis n. sp. is distinguished from the congeners by the shape and position of lateral body processes, the shape of sensory papilla on leg IV, and the contour of head portion not clearly divided into two lobes. A revised key to the nine species of the genus Halechiniscus is prepared.

• Proceedings of the Zoological Society Korea Conference
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• 1998.04a
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• pp.28.1-28
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• 1998

No Abstract, See Full Text

• Animal Systematics, Evolution and Diversity
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• v.15 no.1
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• pp.107-118
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• 1999

Eight tardigrade species belonging to the genus Batillipes are recorded from the intertidal and shallow sublittoral sands at 29 localities in South Korea. Batillipes rotundiculus n. sp. is characteristic in having the round caudal protrusion and the blister-like lateral body protuberance between legs III and IV. Five species (B. pennaki Marcus, B. similis Schulz, B. tridentatus Pollock, B. crassipes Tchesunov and Mokievsky, and B. philippinensis Chang and Rho), newly known to Korean fauna, are briefly remarked with illustrations. A key to the eight species of the batillipedid tardigrades from Korea is prepared.

• Animal Systematics, Evolution and Diversity
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• no.nspc3
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• pp.39-44
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• 1992

Two species of tradigrades Doryphoribius zappalai and Parhexapodibius pilatoi are redescribed, which are newly recorded from Korea.

• Applied Microscopy
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• v.51
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• pp.16.1-16.7
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• 2021

Electron microscopy (EM) is an essential imaging method in biological sciences. Since biological specimens are exposed to radiation and vacuum conditions during EM observations, they die due to chemical bond breakage and desiccation. However, some organisms belonging to the taxa of bacteria, fungi, plants, and animals (including beetles, ticks, and tardigrades) have been reported to survive hostile scanning EM (SEM) conditions since the onset of EM. The surviving organisms were observed (i) without chemical fixation, (ii) after mounting to a precooled cold stage, (iii) using cryo-SEM, or (iv) after coating with a thin polymer layer, respectively. Combined use of these techniques may provide a better condition for preservation and live imaging of multicellular organisms for a long time beyond live-cell EM.