Showing papers by "Wonchoel Lee published in 2013"
TL;DR: Seven new stygobiotic species are described, including three from Korea and four from Japan, which demonstrates the inadequacy of current morphological methods of identifying closely related species of copepods.
Abstract: Copepods have been poorly studied in subterranean habitats in Korea. Previous records have indicated mostly the presence of species already described from Japan, with very few endemic elements. This commonality has usually been explained by repeated dispersal across the land bridges that connected the two countries several times during the Pleistocene glacial cycles. However, the Korean Peninsula is known for pockets of Cambrian and Ordovician carbonate rocks, with more than 1,000 caves already having been explored. The relative isolation of these carbonate pockets makes for an enormous speciation potential, and the development of a high level of short-range endemism of subterranean copepods should be expected. Representatives of the genus Diacyclops Kiefer, 1927 are here investigated from a range of subterranean habitats in South Korea, with comparative material sampled from central Honshu in Japan. Morphological analyses of microcharacters, many of which are used in cyclopoid taxonomy for the first time herein, reveal high diversity in both countries. No subterranean species is found in common, although the existence of four sibling species pairs in Korea and Japan may be indicative of relatively recent speciation. We describe seven new stygobiotic species, including three from Korea (Diacyclops hanguk sp. n., Diacyclops leeae sp. n., and Diacyclops parasuoensis sp. n.) and four from Japan (Diacyclops hisuta sp. n., Diacyclops ishidai sp. n., Diacyclops parahanguk sp. n., and Diacyclops pseudosuoensis sp. n.). Diacyclops hanguk, Diacyclops parasuoensis, Diacyclops ishidai, and Diacyclops parahanguk are described from newly collected material, while the other three new species are proposed for specimens previously identified as other, widely distributed species. Diacyclops brevifurcus Ishida, 2006 is redescribed from the holotype female, and Diacyclops suoensis Ito, 1954 is redescribed from material newly collected near the ancient Lake Biwa in Japan. This research provides evidence for the importance of subterranean habitats as reservoirs of biodiversity, and also demonstrates the inadequacy of current morphological methods of identifying closely related species of copepods. The disproportionately high diversity discovered around Lake Biwa provides further evidence in support of the hypothesis about the role of ancient lakes as biodiversity pumps for subterranean habitats. A key to the East Asian species of the languidoides-group is provided.
21 citations
TL;DR: New records of water mites of the family Torrenticolidae Piersig, 1902 (Acari: Hydrachnidia) from streams in South Korea and the Russian Far East are presented.
Abstract: New records of water mites of the family Torrenticolidae Piersig, 1902 (Acari: Hydrachnidia) from streams in South Korea and the Russian Far East are presented. Detailed descriptions or redescrptions are provided for eight species of the genera Torrenticola Piersig, 1896 and Monatractides K. Viets 1926. Two species are described as new to science: Torrenticola kimichungi sp. n. and Monatractides abei sp. n. Five species are reported as first records from Korea: Torrenticola brevirostris (Halbert, 1911); Torrenticola dentifera Wiles, 1991; Torrenticola recentis Tuzovskij, 2003; Torrenticola ussuriensis (Sokolow, 1934); and Torrenticola turkestanica (Sokolow, 1926). Torrenticola nipponica (Enami, 1940) is reported for the first time from Russia.
17 citations
16 Apr 2013
TL;DR: I. hanguk, new species, collected from a stream in South Korea, is described, which is very closely related to I. dentifera Sars, 1903 and I. angulata Sar, 1903, both originally described from China and also reported from Korea and Japan.
Abstract: Ilyocypris Brady & Norman, 1889 is a globally distributed freshwater ostracod genus, with 27 Recent species described so far. In the present paper we describe I. hanguk, new species, collected from a stream in South Korea. This species is very closely related to I. dentifera Sars, 1903 and I. angulata Sars, 1903, both originally described from China and also reported from Korea and Japan. Due to their limited descriptions, the two species were often synonymized in the past, and I. angulata was considered a parthenogenetic form of I. dentifera. In order to re-examine morphological characteristics of I. dentifera and I. angulata, as well as to compare them with the new Korean species, we have studied the type material deposited in the Zoological Museum in Oslo. This revealed that I. dentifera Sars, 1903 and I. angulata Sars, 1903 are valid species, with clear morphological differences. We have also discovered males of I. angulata in the type series. In addition, another form, which we identify as I...
12 citations
TL;DR: A new species of Triconia in the family Oncaeidae, Triconiales pacifica sp.
Abstract: A new species of Triconia in the family Oncaeidae, Triconia pacifica sp. nov., and a new form variant each of Triconia giesbrechti Bottger-Schnack and Triconia elongata Bottger-Schnack are described from two sites in the Pacific. Triconia pacifica can be distinguished from its sibling Triconia dentipes (Giesbrecht) by (1) morphometric characters, including the proportional lengths of distal endopod spines of swimming leg 4, and the relative length of the outer basal seta on P5, and by (2) a number of micro-structures on the appendages. The Pacific specimens of T.elongata and T.giesbrechti resemble the typical forms in morphometric characters, with some minor differences in proportional spine lengths on the swimming legs, and differ in a few micro-structures. The hitherto unknown male of T.giesbrechti is newly described. For all species/forms described, the intraspecific variability of proportional spine lengths on the endopods of P2-P4 is examined and discussed
8 citations
TL;DR: Eight species of Hatschekia are described from the gill filaments of seven perciform fish hosts (four serranids, two lutjanids and a lethrinid) collected off New Caledonia, seven of them are newly described.
Abstract: Members of the genus Hatschekia Poche, 1902 (Copepoda: Siphonostomatoida: Hatschekiidae) are gill parasites found on eight orders of marine actinopterygian fishes: Anguilliformes, Aulopiformes, Beryciformes, Ophidiiformes, Perciformes, Pleuronectiformes, Scorpaeniformes, and Tetraodontiformes. The genus Hatschekia is particularly species rich in tropical and subtropical regions. Eight species of Hatschekia are described from the gill filaments of seven perciform fish hosts (four serranids, two lutjanids and a lethrinid) collected off New Caledonia. Seven of them are newly described: Hatschekia maculatus n. sp. from Epinephelus maculatus (Bloch, 1790), Hatschekia cyanopodus n. sp. from Epinephelus cyanopodus (Richardson, 1846), Hatschekia louti n. sp. from Variola louti (Forsskal, 1775), Hatschekia euanus n. sp. from Gymnocranius euanus (Gunther, 1879), Hatschekia etelisicola n. sp. from Etelis carbunculus (Cuvier, 1828) and Etelis coruscans Valenciennes, 1862, Hatschekia fuscoguttatus n. sp. from Epinephelus fuscoguttatus (Forsskal, 1775), and Hatschekia niger n. sp. from Macolor niger (Forsskal, 1775). The widely distributed species Hatschekia cadenati Nunes-Ruivo, 1954 is redescribed based on material from Epinephelus cyanopodus and was also newly recorded from another five species of Epinephelus Bloch, 1793 and two species of Variola Swainson, 1839 (all members of the serranid subfamily Epinephelinae Bleeker, 1875). Partial sequences of the mitochondrial gene COI (cytochrome c oxidase subunit I) of Hatschekia maculatus n. sp., H. cyanopodus n. sp. and H. cadenati were obtained and submitted to GenBank.
4 citations
TL;DR: Three new species of Paramesochridae are described from the subtidal zone off Pungdo Island, west coast of Korea, and are placed in the dubia-group by the inner seta on the endopod of leg 3 and leg 4.
Abstract: Three new species of Paramesochridae are described from the subtidal zone off Pungdo Island, west coast of Korea. Paramesochra parasimilis sp. nov. is closely related to Paramesochra similis. However, the new species is clearly distinguished by the characteristic seta IV of the caudal rami. Paramesochra pungdoensis sp. nov is characterized by five setae in antennary exopod and seta IV, which is longer than the caudal ramus. Paramesochra mirabilis sp. nov. has a laterally bent caudal seta V in the female. These three new species are placed in the dubia-group by the inner seta on the endopod of leg 3 and leg 4. Also, a redescription of Paramesochra similis Kunz, 1936 is provided, and an updated key to the species of Paramesochra is suggested. http://www.zoobank.org/urn:lsid:zoobank.org:pub:F017D873-6A34-4976-A7EA-589038E1A9A3
4 citations
TL;DR: A definitive COI gene barcode is provided for the holotype of Amynthas daeari but the age since collection or preservation of the Amynnthas jinburi type in 2000 precluded its mtDNA extraction at this time.
Abstract: Two Korean endemic pheretimoid Amynthas Kinberg, 1867 species belonging in family Megascolecidae s. stricto are sketched, dissected and described. Amynthas daeari Blakemore sp. n. has spermathecae in 6/7/8 complying with an Amynthas tokioensis spp-group, whilst Amynthas jinburi Blakemore sp. n. has spermathecal pores in 5 & 6 strictly complying with Sims and Easton’s (1972) Amynthas canaliculatus-group. A definitive COI gene barcode is provided for the holotype of Amynthas daeari but the age since collection or preservation of the Amynthas jinburi type in 2000 precluded its mtDNA extraction at this time.
4 citations