• Animal Systematics, Evolution and Diversity
• /
• v.4 no.1
• /
• pp.47-56
• /
• 1988

한국 육상성 이완보동물(Heterotardigrada, Tardigrada)상을 조사하기 위하여 1985년 4월부터 1987년 10월까지 전국 각 지역에서 채집된 이끼와 지의류를 조사한 결과, 이 중 14개 지소에서 표본들을 열었고 동정한 결과 10종의 육상 이완보류가 확인되었다. 이들에 대한 그림과 아울러 기재 또는 특기 (remarks )를 기록하였는바 2종을 제외한 나머지 8종은 한국에서 처음으로 보고되는 종들이다.

• Animal Systematics, Evolution and Diversity
• /
• v.6 no.2
• /
• pp.231-234
• /
• 1990

1985년 8월부터 1987년 9월까지 한국의 8개지역에서 채집된 완보류 1종이 genus Echiniscus 에 속하는 신종임에 확인되어 Echiniscus hoonsooi 라고 명명하고 기재한다.

• Animal Systematics, Evolution and Diversity
• /
• no.nspc2
• /
• pp.87-96
• /
• 1988

Eight species of Eutardigrada found in Korea are described. They are Dactylogiotus dispar, Macrobiotus pullari, Hypsibius dujardini, H. oberhaeuseri, Isohypsibius schaudini, I.tetradactyloides, Diphascon scoticum and Milnesium tardigradum ; all are new to Korea.

• Animal Systematics, Evolution and Diversity
• /
• v.12 no.1
• /
• pp.53-59
• /
• 1996

The rotifers collected from various terrestrial habitats, such as mosses, lichens, dry detritus and temporary pools after rain were investigated. Five species and/or subspecies in two families of digonont rotifers were identified: Rotaria tardigrada, Macrotrachela quadricornifera quadricornifera, Macrotrachela quadricornifera scutellata, Adineta vaga minor, Adineta steineri. All these are new to Korean fauna. This is the first taxonomic study on the Korean digonont rotifers.

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

• Animal cells and systems
• /
• v.1 no.3
• /
• pp.419-423
• /
• 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
• /
• v.12 no.3
• /
• pp.245-252
• /
• 1996

Isohypsibius granditintinus, a new tardigrade species of genus Isohypsibius, collected from the sand bottom of the estuary of Taejongchon River, Kyongju, is described. the present new species differs from its congeners in having the combinaton of the following characters: smooth cuticles; three macroplacoids; absence of microplacoid, lunule and cuticular bar; very elongate external claws with two accessory points.

• Animal Systematics, Evolution and Diversity
• /
• v.7 no.2
• /
• pp.225-232
• /
• 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
• /
• v.18 no.1
• /
• pp.91-98
• /
• 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.

• Animal Systematics, Evolution and Diversity
• /
• v.18 no.1
• /
• pp.165-179
• /
• 2002

In spite of dramatic change of environmental condition since Cambrian big-bang (explosion occurred ca.540 mya, the phylum Arthropoda retains a great diversity, and it is estimated approximately that 1-10 million arthropod species are extant on the earth. Except for an extinct arthopod subphylum Trilobita, extant arthropods could be divided into five subphyla: Hexapoda, Crustacea, Myriapoda, Chelicerata, and Pycnosonida. During the last century, systematists have disputed about interrealtionships among Arthropoda and its relatives (Onychophora, Tardigrada, and Pentastomida), arthropod phylogenetic position within protostome animals, monophyly or polyphyly of the phylum Arthropods, and interrelationships among five arthropod subgroups (subphyla) etc. Recently, new animal phylogeny was reported that protostomes could be clustered into two groups, Lophotrochozoa and Ecdysozoa, and molting animals such as Nematoda and Arthropoda were included within the Ecdysozoa. On the basis of the new animal phylogeny, first of all, I would mention phylogenetic positions and relationships of Arthropods and its relatives to introduce controversies of arthropod phylogeny in phylum level of animals. After that, I focused mainly on the controveries related to arthropod monophyly and phylogenetic relationships among four major arthropod groups except Pycnogonida. In this work, Pycnogonida which is a relatively small group and one of the five arthropod subphyla was not handled significantly although there are some controversies if it is a sister taxon of chelicerates or the most primitive arthropod group (namely, a sister of four remains arthropod groups).