Il-Hoi Kim

Poecilostomatoid Copepods from an Intertidal Mud Flat in the Yellow Sea

Thirteen new species and one new genus of poecilostomatoid copepods are described from intertidal mud flats in the central west coast of the Korean Peninsula facing the Yellow Sea. Nine species are found in association with invertebrates: Hemicyclops ventriplanus n. sp. from the decapod crustacean Upogebia major (De Haan); Clausia lobata n. sp. from the polychaete Marphysa sanguinea (Montagu); Presynaptiphilus minutus n. sp. from the ophiuroid Amphiura sinicola (Matsumoto); Synaptiphilus longicaudus n. sp. and Enterophilus cercomegalus n. gen. et n. sp. from the holothurian Protankyra bidentata (Woodward and Barrett); Goidelia pelliviva n. sp. from an echiuroid Thalassema sp.; Lichomolgus bullatus n. sp. from the bivalve Striarca (Didimacar) tenebrica (Reeve); Critomolgus nudus n. sp. from the pennatulacean Virgularia gustaviana (Herklots); and Notoxynus tertius n. sp. from the sea anemone Cerianthus filiformis Carlgren. The other four species are found in stagnant water on the mud flat: Kelleria vaga n. sp., Macrochiron anormalum n. sp., Pseudomacrochiron urostenum n. sp. and Pseudanthessius dentatus n. sp.

Lernanthropid copepods (Siphonostomatoida) parasitic on fishes of the Gulf of Thailand

Five species of copepods (Siphonostomatoida: Lernanthropidae) parasitic on fishes of the Gulf of Thailand are reported. They are: Lernanthropus corniger Yamaguti, 1954 from Megalaspis cordyla (Linnaeus); L. latis Yamaguti, 1954 from Lates calcarifer (Bloch); L. nemipteri Jayasree & Pillai, 1976 from Scolopsis lineata Quoy et Gaimard; L. sillaginis Pillai, 1963 from Priacanthustayenus Richardson; and Norion tayenus n. sp. from P. tayenus. Except for L. sillaginis, the remaining four species are new to Thailand. Lernanthropus priacanthi Kirtisinghe, 1956 is transferred to Norionas N. priacanthi (Kirtisinghe, 1956) n. comb.

NEW SPECIES OF DORIDICOLA (COPEPODA, RHYNCHOMOLGIDAE) FROM THAILAND, WITH A CLADISTIC ANALYSIS OF THE GENUS

Abstract Doridicola similis n. sp. (Poecilostomatoida, Rhynchomolgidae) is described from specimens found on the gills of a squid (Sepiotheuthis lessoniana Lesson) caught in the Gulf of Thailand. It is close to its congeners D. longicauda (Claus, 1860) and D. sepiae (Izawa, 1976) but can be distinguished from them by the possession of longer caudal rami. A cladistic analysis of the genus revealed that the 12 species of Doridicola associated with mollusks (Gastropoda, Bivalvia, and Cephalopoda) are on the same clade that diverged early in cladogenesis from those species occurring mostly on the octocorallian (alcyonacean) cnidarians. The three species occurring on cephalopods are monophyletic and closely allied with D. agilis Leydig, 1853, occurring on nudibranchs in Europe.

Chondracanthid copepods parasitic on flatfishes of Kerala, India

Eight species of chondracanthid copepods (Poecilostomatoida) were recovered from nine species of flatfishes collected in Kerala, India. They are: Acanthochondria zebriae sp. nov. from Zebrias synaturoides; Bactrochondria papilla gen. et sp. nov. from Cynoglossus dubius; B. hoi (Pillai, 1985) from C. lida; Heterochondria pillai Ho, 1970 from C. lida, Pseudorhombus arsius, P. elevatus, P. javanicus and P. triocellatus; H. petila sp. nov. from P. arsius, P. javanicus and P. triocellatus; H. similis (Yu and Wu, 1932) from C. azureus; and both Protochondracanthus alatus (Heller, 1868) and P. trilobatus (Pillai, 1964) from Psettodes erumi.

DNA Barcoding of Metazoan Zooplankton Copepods from South Korea.

Copepods, small aquatic crustaceans, are the most abundant metazoan zooplankton and outnumber every other group of multicellular animals on earth. In spite of ecological and biological importance in aquatic environment, their morphological plasticity, originated from their various lifestyles and their incomparable capacity to adapt to a variety of environments, has made the identification of species challenging, even for expert taxonomists. Molecular approaches to species identification have allowed rapid detection, discrimination, and identification of cryptic or sibling species based on DNA sequence data. We examined sequence variation of a partial mitochondrial cytochrome C oxidase I gene (COI) from 133 copepod individuals collected from the Korean Peninsula, in order to identify and discriminate 94 copepod species covering six copepod orders of Calanoida, Cyclopoida, Harpacticoida, Monstrilloida, Poecilostomatoida and Siphonostomatoida. The results showed that there exists a clear gap with ca. 20 fold difference between the averages of within-specific sequence divergence (2.42%) and that of between-specific sequence divergence (42.79%) in COI, suggesting the plausible utility of this gene in delimitating copepod species. The results showed, with the COI barcoding data among 94 copepod species, that a copepod species could be distinguished from the others very clearly, only with four exceptions as followings: Mesocyclops dissimilis–Mesocyclops pehpeiensis (0.26% K2P distance in percent) and Oithona davisae–Oithona similis (1.1%) in Cyclopoida, Ostrincola japonica–Pseudomyicola spinosus (1.5%) in Poecilostomatoida, and Hatschekia japonica–Caligus quadratus (5.2%) in Siphonostomatoida. Thus, it strongly indicated that COI may be a useful tool in identifying various copepod species and make an initial progress toward the construction of a comprehensive DNA barcode database for copepods inhabiting the Korean Peninsula.

TWO SPECIES OF POECILOSTOMATOID COPEPODS INHABITING GALLS ON SCLERACTINIAN CORALS IN OKINAWA, JAPAN

Abstract Two species of the poecilostomatoid copepods, Allopodion ryukyuensis n. sp. and Xenomolgus varius Humes and Stock, are recorded from galls and crypts on the scleractinian corals Montipora informis and Porites sp.(p), respectively, in Okinawa, Japan. Allopodion ryukyuensis is distinguished from its sole congener, A. mirum Humes, by having shorter caudal rami and abdominal somites, rounded lateral margins of the female genital double-somite, and a greater number of setal elements on the third exopodal segment of legs 2-4. The morphological features of the galls and crypts on the scleractinian hosts inhabited by A. ryukyuensis and X. varius are described, and it is proposed that certain other scleractinian-associated copepods likely also make use of similar habitations.

A new genus of poecilostome copepod of the family Myicolidae parasitic in a commercial clam from Malaysia

A new genus and species of the family Myicolidae (Poecilostomatoida), Pengna bicornuta, is described based on the material recovered from the mantle cavity of the razor clam Pharella acuminata (Hanley) purchased from the market in Penang, Malaysia. Another new genus, Exostrincola, is proposed to accommodate Ostrincola simplex Humes, 1959 which differs from the species of Ostrincola in the structure of egg sac and the armature on the endopod of legs 2 and 3. A key is provided for identification of the six genera in the Myicolidae.

Ten new species of parasitic cyclopoid copepods (Crustacea) belonging to the families Bomolochidae, Philichthyidae, and Taeniacanthidae from marine fishes in Korea

Ten new species of cyclopoid copepods are described as parasites of marine fishes from Korea. Three new species of the family Bomolochidae are described as gill parasites: Orbitacolax pteragogi n. sp. from Pteragogus flagellifer (Valenciennes), Orbitacolax trichiuri n. sp. from Trichurus lepturus Linnaeus, and Orbitacolax unguifer n. sp. from Evynnis japonica Tanaka. Four species of the genus Colobomatus Hesse, 1873 of the family Philichthyidae are described as internal parasites: Colobomatus unimanus n. sp. from Pseudolabrus eoethinus (Richardson), Colobomatus recticaudatus n. sp. from Halichoeres poecilopterus (Temminck and Schlegel), Colobomatus floridus n. sp. from Hapalogenys mucronatus (Eydoux and Souleyet), and Colobomatus orientalis n. sp. from Johnius grypotus (Richardson). Three new species of the family Taeniacanthidae, including a new species belonging to a new genus, are described as gill parasites: Taeniacanthus singularis n. sp. from Halieutaea fumosa Alcock, Triacanthus luteus n. gen. n. sp. from Odontamblyopus lacepedii (Temminck and Schlegel), and Umazuracola geminus n. sp. from Stephonolepis cirrhifer (Temminck and Schlegel).

Copepods of Hatschekiidae (Copepoda, Siphonostomatoida) new to Korean fauna, with description of a new species

Eight species of the Hatschekiidae are recorded as parasites of marine fishes from southern coast of Korea. One new species, Hatschekia jejuensis, parasitic on Cheilodactylus zonatus Cuvier is included. The remaining seven species are new to Korean fauna: Hatschekia iridescens Wilson, 1913, H. japonica Jones, 1985, H. monacanthi Yamaguti, 1939, H. tenuis (Heller, 1865) H. pseudolabri Yamaguti, 1953, H. cylindrica Shiino, 1957, and Pseudocongericola chefoonensis Yü, 1933. Hatschekia jejuensis n. sp. has a combination of characteristics in the female where the trunk is 2.35 times as long as the cephalothorax and displays a pair of posterolateral bulges on both sides, the antennules is 5-segmented, the mandible bears six teeth, and the armature formulae of the legs are I-0; III (exopod) and 0-0; II (endopod) for leg 1 and I-0; I (exopod) and 0-0; II (endopod) for leg 2.

Sarcotretes Longirostris N. Sp. (Copepoda: Pennellidae) Parasitic on Bluefin Driftfish (Psenes Pellucidus) from the Stomachs of Short-Finned Pilot Whales Caught off Japan

Abstract A new species of pennellid (Pennellidae, Copepoda), Sarcotretes longirostris n. sp., is described based on specimens collected from bluefin driftfish (Psenes pellucidus Lütken) found in the stomach of short-finned pilot whale (Globicephala macrorhynchus Gray) caught in the western North Pacific off central Honshu, Japan. The new species differs from its congeners in the possession of 1) a long proboscis (longer than the cephalothorax); 2) a pair of blunt, lateral cephalothoracic processes (holdfast); and 3) a long neck that is distinctly longer than the trunk. This is the first species of copepod parasite reported from a representative of the genus Psenes.