Two new species of the genus Panaietis (Copepoda: Cyclopoida: Anthessiidae) inhabiting inside mouth cavities marine snails are described from shallow waters southern Japan. bobocephala sp. nov. collected small abalone, Haliotis asinina (Vetigastropoda: Lepetellida: Haliotidae), is mainly characterized by well-developed posterolateral corners tergite on first pediger, pointed spines legs 1 to 5, maxilla with two teeth, and leg armature formula. flavellata Angaria neglecta Trochida:...

Four species of copepods are described based on specimens both sexes from tegulid top shells (Vestigastropoda) caught coastal waters southern Japan. Three species, including two undescribed and one known the genus Panaietis (Copepoda: Cyclopoida: Anthessiidae) were found in pharynx esophagus gastropods. incamerata Stebbing, 1900, P. doraconis n. sp., satsuma sp. distinguished its congeners by dorsal plates first pedigerous somite, genital shape spines legs, number setae legs 1 2, position...

A new species of dirivultid copepod (Siphonostomatoida) is described from hydrothermal vents in a volcanic seamount Izu-Bonin Arc, western part North Pacific Ocean. The was collected during the research cruise NT13-09 using R/V Natsushima with ROV Hyper-Dolphin April 2013. type series populations Paralvinella spp. (Annelida: Alvinellidae) on an active vent chimney at depth 795 m. Stygiopontius senokuchiae n. sp. most closely related to S. teres Humes, 1996 but clearly distinguished latter by...

A checklist of the marine and estuarine fishes Madang District is presented, combining both previous new records. After recent PAPUA NIUGINI 2012 expedition, a total 1337 species in 129 families have been recorded from region. One one family not native (Cichlidae: Oreochromis mossambicus), but has introduced. The fish fauna therefore consists 1336 128 families. largest are Gobiidae, Labridae, Pomacentridae, Apogonidae, Serranidae, Blenniidae, Chaetodontidae, Syngnathidae Muraenidae,...

A new genus and species of clausiid copepod (Cyclopoida), Oshoroclausia shibazakii n. g. sp., is described based on a single female collected subtidally in Oshoro Bay, the western coast Hokkaido, Sea Japan. characterized by following feature female: elongate body lacking distinct segmentation from first pedigerous to anal somite, 2-segmented antenna with two terminal claws, legs 1 4 bearing rami. This record Japanese waters.

A rare copepod parasitic on marine fish, Luetkenia elongata Shiino, 1963 (Siphonostomatoida: Pandaridae), is redescribed based type specimens and additional obtained from Luvarus imperialis Rafinesque, 1810 caught in the eastern western North Pacific Ocean off California Japan, respectively. This represents first record of this parasite Japanese waters. The differs its sole congener, L. asterodermi Claus, 1864, by following features female: fourth pedigerous somite with one pair elongate...

We describe Parakonarus kajii sp. nov. from near Iriomote Island, Ryukyu Islands, southwestern Japan. This is the first record of North Pacific. As members in this genus show great sexual dimorphism, we checked our male and female specimens for conspecificity by using partial sequences cytochrome c oxidase subunit I (COI) gene. The two individuals differed nucleotide substitutions 661 nt (0.3% K2P distance), indicating they are same species. species closely resembles P. kopure reported New...

Four species of the genus Hatschekia Poche, 1902 (Copepoda: Siphonostomatoida; Hatschekiidae) are redescribed based on specimens collected from tetraodontiform fishes captured recently in Japanese waters: female H. iridescens Wilson, 1913 Diodon liturosus Shaw (representing a new host record), D. hystrix L., and holocanthus L.; legouli Nuñes-Ruivo, 1954 parasite record for Japan) Chilomycterus reticulatus ostracii Yamaguti, 1953 Ostracion immaculatus Temminck & Schlegel O. cubicus both...

Mihbaicola sakamakii is a mesoparasitic copepod that infests the branchiostegal membranes of groupers (Perciformes: Serranidae). In this study, we observed M. within host tissue. Histologically, copepods were found enclosed inside pouch composed thickened epidermis host, tightly encased on all sides by epidermal wall. There no blood cells or other food resources in lumen. Since was intact and continuous, even vicinity oral region parasite, would not have access to state. However, stomach...

Understanding how animals evolve to become parasites is key unravelling biodiversity generated as a whole, could account for half of all species richness. Two significant impediments this are that fossilize poorly and they retain few clear shared morphological features with non-parasitic relatives. Barnacles include some the most astonishingly adapted adult body reduced just network tubes plus an external reproductive body, but originated from sessile, filter-feeding form still mystery....

Four new species of splanchnotrophid copepods are described based on specimens collected from 5 doridacean nudibranchs coastal waters Japan. They belong to 3 genera, one which, Majimun gen. n., is new. The parasites and their hosts as follows: Ceratosomicola japonicasp. n. ex Hypselodoris festiva (A. Adams); Splanchnotrophus helianthussp. Thecacera pennigera (Montagu); imagawaisp. Trapania miltabrancha Gosliner & Fahey; shirakawaigen. et sp. Roboastra luteolineata (Baba) gracilis (Bergh)....

Eleven new species of the genus Hatschekia Poche, 1902 (Copepoda: Siphonostomatoida: Hatschekiidae) are described based on female specimens from triggerfishes (Tetraodontiformes: Balistidae) caught in coastal waters Ryukyu Islands, Japan. These include hemicyclium n. sp. Rhinecanthus rectangulus (Bloch & Schneider), R. aculeatus (L.) and verrucosus (L.); H. jonesi Sufflamen bursa Schneider) S. fraenatum (Latreille); kabatai izenaensis Xanthichthys lineopunctatus (Hollard); churaumi...

ABSTRACT Hydrothermal vents are biodiversity hotspots on the deep seafloor powered by chemosynthetic primary production, inhabited a specially adapted fauna whose composition varies between regions. Sumisu Caldera, located approximately 500 km south of Tokyo, hosts hot vent with an unusual species among Izu–Ogasawara Arc sites and has been suggested as priority site for conservation in light upcoming deep‐sea mining massive sulfides. However, this was based just five serendipitously recorded...

Three new species of pennellid copepods are described based on specimens taken from gobiid fishes. Creopelates nohmijimensis n. sp. was found Priolepis boreus (Snyder) in the Seto Inland Sea, Japan. This is distinguishable its sole congener, C. floridus Shiino, 1958, by presence four finely digitate lobes cephalothorax and having pairs legs occurring closely together at anterior end neck. Two Cardiodectes, asper bertrandi sp., were collected, Trimma grammistes (Tomiyama) off IzuOshima...

A new species of copepod, Sarcotretes umitakae sp. n., the siphonostomatoid family Pennellidae is described based on female specimens from rattail Coelorinchus jordani Smith and Pope (Actinopterygii: Gadiformes: Macrouridae) caught in East China Sea. This characterized by exhibiting following characters: large proboscis projects strongly; head bears paired lateral processes which are bulbous taper into a slender horn; twisting neck significantly longer than trunk; trunk an anterior...

Goniopora stokesi is an uncommon species mainly found in tropical and subtropical regions but was also reported temperate of Japan. This has two unique characteristics. First, it does not typically attach to hard substrates, i.e., free-living. Although non-free-living colonies were reported, unclear whether their morphologies exhibit intraspecific or interspecific differences. Second, they can asexually form daughter colonies, which are secondary that grow on the surface (coenosac) a parent...

Currently, many fish parasites have been dispersed worldwide via the movement of fishes for food, sport, or aquarium trade. The freshwater parasitic copepod Neoergasilus japonicus (Harada, 1930) is such an example: it native to eastern Asia, but has introduced southern Europe, and North America. Since N. regarded as important alien parasite in regions, more information needed on ecology host-parasite relationships this species. In study, specimens were collected from following seven...

Infections with the pennellid Peniculus minuticaudae Shiino, 1956 occurred on three species of marine fishes, unicorn leatherjacket filefish, Aluterus monoceros (L.), hairfinned leatherjacket, Paramonacanthus japonicus (Tilesius), and brown-banded butterflyfish, Roa modesta (Temminck & Schlegel), held at a public aquarium in Kagoshima, Japan. Using specimens from type material, postmetamorphic premetamorphic adult females P. are redescribed. The male, copepodid I, late chalimus stages...