著者
Etsuro Sawai Yusuke Yamanoue Laith Jawad Juma Al-Mamry Yoichi Sakai
出版者
日本動物分類学会
雑誌
Species Diversity (ISSN:13421670)
巻号頁・発行日
vol.22, no.1, pp.99-104, 2017-05-25 (Released:2017-05-25)
参考文献数
20

We employed molecular systematic analysis based on mitochondrial D-loop sequences to identify two specimens of ocean sunfish from Omani coastal waters that had previously been identified morphologically as Mola mola (Linnaeus, 1758) and M. ramsayi (Giglioli, 1883). Of the three molecular species that are recognized globally, Mola sp. A, Mola sp. B, and Mola sp. C, we confirmed that both specimens from Oman are Mola sp. A. This result suggested a broader distribution of this species than had ever been thought, but it also revealed a discrepancy between morphological and genetic characters in Mola taxonomy. We reexamined the morphology of the two specimens from Oman to clarify the extent to which the key morphological features correspond with molecular genetic identifications, and discovered errors in the original reports on both specimens.
著者
Yusuke Yamana Hayato Tanaka Shu Nakachi
出版者
日本動物分類学会
雑誌
Species Diversity (ISSN:13421670)
巻号頁・発行日
vol.22, no.1, pp.53-68, 2017-05-25 (Released:2017-05-25)
参考文献数
32

Three new sea cucumbers collected in the intertidal and subtidal zone of southern Japan, Taeniogyrus mijim sp. nov., Rowedota chippiru sp. nov., and R. motoshimaensis sp. nov., are described. All three species display a small body size (approximately 10–20 mm), light body colour (primarily a transparent solid colour), and a small number of digits in their tentacles (one pair or two). They are easily distinguished from each other and from other congeners by the number of digits and by ossicle size and shape. Among these species, the state of the tooth series on the inner margin of the wheel ossicles is an important defining feature, i.e., a continuous row in Taeniogyrus but interrupted by concavities in Rowedota. Also, each tooth is sharp in T. mijim, trapezoidal in R. chippiru, and semicircular in R. motoshimaensis. The number of teeth per radiant is 7–16 (means of 10–13 in different specimens) in T. mijim, 7–15 (means 9–12) in R. chippiru, and 8–21 (means 11–19) in R. motoshimaensis. Among these three new species, only R. chippiru has thick rod ossicles in the body wall.
著者
Fumihito Tashiro Yusuke Hibino Kei Miyamoto
出版者
The Japanese Society of Systematic Zoology
雑誌
Species Diversity (ISSN:13421670)
巻号頁・発行日
vol.22, no.2, pp.213-217, 2017-11-25 (Released:2017-12-05)
参考文献数
10

An old museum specimen of the rare deep-sea species Ophichthus exourus McCosker, 1999 (Anguilliformes: Ophichthidae) (685 mm in total length) collected near Saipan and a recently collected example from Okinawa, Japan (634 mm in total length) represent the first Northern Hemisphere records of the species, previously known only from the southwestern Pacific in waters off New Caledonia and Fiji, but now believed to be widely distributed in the western Pacific Ocean. A detailed morphological observation based on the above specimens and a re-examination of the holotype resulted in a revision of some species characteristics, including the number of infraorbital pores. Ophichthus exourus is distinguished from other congeners by the following combination of characters: head 8.3–10.0% of total length; upper jaw 36.1–38.1% of head length; pectoral-fin rounded, length 19.2–24.1% of head length; rear margin of eye above or slightly behind rictus; eye diameter 44.4–61.2% of snout length; horizontal length of posterior nostril dermal flap much greater than diameter of anterior nostril tube; gill opening to dorsal-fin origin greater than twice pectoral-fin length; preopercular pores 2; predorsal and total vertebrae 20–21 and 173–177, respectively; lower-jaw teeth nearly uniserial; body without bands or spots; posteriormost portion (much shorter than head length) of anal-fin membrane indistinct darkish brown. A new standard Japanese name “Gunbai-umihebi” is proposed for the species.
著者
Naoto Jimi Masaatsu Tanaka Hiroshi Kajihara
出版者
The Japanese Society of Systematic Zoology
雑誌
Species Diversity (ISSN:13421670)
巻号頁・発行日
vol.22, no.2, pp.133-141, 2017-11-25 (Released:2017-12-05)
参考文献数
28

A new species of hesionid polychaetes, Leocratides kimuraorum sp. nov., is described based on material collected from the Shima Peninsula and Sagami Bay (middle Honshu, Japan), as well as museum specimens collected from Sagami Bay, Suruga Bay, and Shirahama. Leocratides kimuraorum sp. nov. is the third species in this genus and can be discriminated from the two congeners, L. filamentosus Ehlers, 1908 and L. ehlersi (Horst, 1921), by i) the length of the antennae, which are as long as palps, ii) the presence of pharyngeal terminal papillae, and iii) the absence of a papillose peristomial membrane. On the other hand, L. filamentosus, originally described from off Western Sumatra, Indonesia, was also collected from Sagami Bay, and represents a new record of this species for Japanese waters. Partial mitochondrial cytochrome c oxidase subunit I gene sequences from the holotype of L. kimuraorum sp. nov. and newly collected specimen of L. filamentosus are provided for reliable species identification in the future.
著者
Keita Koeda Yusuke Hibino
出版者
The Japanese Society of Systematic Zoology
雑誌
Species Diversity (ISSN:13421670)
巻号頁・発行日
vol.22, no.2, pp.207-211, 2017-11-25 (Released:2017-12-05)
参考文献数
14

Two specimens (304.0–441.4 mm total length) of Uropterygius fasciolatus (Regan, 1909) were collected from Yonaguni-jima island, the westernmost island in Japan. This species was previously known from Indonesia, Papua New Guinea, the Solomon Islands, Palau, the Tokelau Islands, and the Phoenix Islands. Therefore, the present specimens represent the first record from Japan, as well as the northernmost record of the species up until now. A new standard Japanese name, “Murakumo-kikaiutsubo”, is proposed for the species.
著者
Masato Nitta Kazuya Nagasawa
出版者
The Japanese Society of Systematic Zoology
雑誌
Species Diversity (ISSN:13421670)
巻号頁・発行日
vol.22, no.2, pp.117-125, 2017-11-25 (Released:2017-12-05)
参考文献数
55

Haplocotyle japonica n. gen., n. sp. (Monogenea: Microbothriidae) is described from the skin and gill cavity of Rhinobatos hynnicephalus Richardson, 1846 (Elasmobranchii: Rajiformes: Rhinobatidae) in the Seto Inland Sea off Hiroshima Prefecture and the southern Sea of Japan off Fukuoka Prefecture, Japan. The new genus is closely related to Dermophthirioides Cheung and Nigrelli, 1983, Dermophthirius MacCallum, 1926, Dermopristis Kearn, Whittington, and Evans-Gowing, 2010, and Pseudoleptobothrium Young, 1967 in common morphological features (i.e., the anterior extremity of the oötype having a tetrahedral shape, the anterior aperture of a bell-shaped pharynx, and the structure of the male copulatory organ) but differs from the latter four genera by the presence of a single testis and an ovary not looping the intestinal caeca. The phylogenetic analysis based on 28S rDNA sequences suggests that the new species shows affinity with Dermophthirius and Dermopristis. All currently known species of Microbothriidae Price, 1936 are listed, and a key to 12 genera, including Haplocotyle n. gen., of the family is provided.
著者
Shinri Tomioka Ryuta Yoshida Hiroshi Kajihara
出版者
The Japanese Society of Systematic Zoology
雑誌
Species Diversity (ISSN:13421670)
巻号頁・発行日
vol.22, no.2, pp.127-132, 2017-11-25 (Released:2017-12-05)
参考文献数
11

We describe a new capitellid species, Mastobranchus uru sp. nov., from a tidal flat on Iriomote Island, Okinawa, southern Japan. This species differs from its three congeners in having capillary chaetae only on the notopodia in chaetiger 1 and in the number and arrangement of teeth on hooks. We also provide for this new species a barcode nucleotide sequence from the mitochondrial 16S rRNA gene.
著者
Masato Nitta Kazuya Nagasawa
出版者
日本動物分類学会
雑誌
Species Diversity (ISSN:13421670)
巻号頁・発行日
vol.21, no.2, pp.95-104, 2016-11-25 (Released:2017-02-03)
参考文献数
42

Four alien monogeneans, Unilatus unilatus Mizelle and Kritsky, 1967, U. brittani Mizelle, Kritsky, and Crane, 1968, Trinigyrus peregrinus n. sp., and Heteropriapulus heterotylus (Jogunoori, Kritsky, and Venkatanarasaiah, 2004), were collected from the gills of vermiculated sailfin catfish, Pterygoplichthys disjunctivus (Weber, 1991) (Siluriformes: Loricariidae), in inland waters of Okinawa-jima island, Okinawa Prefecture, Japan. Unilatus unilatus and U. brittani represent new country records for Japan. Trinigyrus peregrinus n. sp. is characterized by a coiled male copulatory organ that forms a circle and does not articulate with its accessory piece. Heteropriapulus heterotylus was newly collected from two rivers in south-central Okinawa-jima island. These monogeneans are all considered to be native to South America and to have been co-introduced with the host fish into the inland waters of the island by release of ornamental pet fish.
著者
Takafumi Nakano Yi-Te Lai
出版者
The Japanese Society of Systematic Zoology
雑誌
Species Diversity (ISSN:13421670)
巻号頁・発行日
vol.22, no.2, pp.143-150, 2017-11-25 (Released:2017-12-05)
参考文献数
21

A quadrannulate leech species, Orobdella meisai sp. nov., from southern Taiwan is described. This new species is characterized by its camouflage coloration, which is unique among the known Orobdella species. Orobdella meisai is the second species of the genus to be described from Taiwan. Phylogenetic analyses using nuclear 18S rRNA, histone H3, mitochondrial cytochrome c oxidase subunit I, tRNACys, tRNAMet, 12S rRNA, tRNAVal, 16S rRNA, tRNALeu and NADH dehydrogenase subunit 1 markers showed that O. meisai and another Taiwanese species, O. ketagalan Nakano and Lai, 2012, formed a supported clade. According to the results of the morphological examination and the phylogenetic position of O. meisai, morphological-phylogenetic relationships of this species and close congeners are briefly discussed.
著者
Masato Nitta Kazuya Nagasawa
出版者
日本動物分類学会
雑誌
Species Diversity (ISSN:13421670)
巻号頁・発行日
vol.22, no.1, pp.1-5, 2017-05-25 (Released:2017-05-25)
参考文献数
25

Dactylogyrus oryziasi n. sp. (Monogenea: Dactylogyridae) is described from the gills of the southern medaka Oryzias latipes (Temminck and Schlegel, 1846) (Beloniformes: Adrianichthyidae) collected from an irrigation canal, Tokushima city, Tokushima Prefecture, Shikoku, Japan. This new species resembles Dactylogyrus rysavyi Ergens, 1970 in having a coiled penis passing through a tube of an accessory piece associated with a sigmoid rod, and shapes of haptoral parts, but these species differ from each other by turns of the penis and a connection point between the rod and tube of the accessory piece. This is the first record of Dactylogyrus from beloniform fish.
著者
Hiroyuki Ariyama Masanori Taru
出版者
The Japanese Society of Systematic Zoology
雑誌
Species Diversity (ISSN:13421670)
巻号頁・発行日
vol.22, no.2, pp.187-200, 2017-11-25 (Released:2017-12-05)
参考文献数
18

Three species of Grandidierella (Crustacea: Amphipoda: Aoridae) were collected from coastal areas of the Tohoku and Kanto-Tokai Districts, East Japan. The first species is G. sanrikuensis sp. nov. from Miyagi Prefecture, which is characterized by the male gnathopod 1 with carpus bearing 3 teeth (only middle tooth large). The second species is G. rubroantennata sp. nov. from Chiba Prefecture. This new species is identical with G. insulae sensu Ariyama (1996), but is different from the true G. insulae Myers, 1981 in the more flagellar articles of the antennae. The last species is G. osakaensis Ariyama, 1996, from river mouths in Kanagawa and Shizuoka Prefectures and an anchialine pool in Izu Oshima Island, Tokyo Prefecture. This species can inhabit various sandy mud bottoms in a brackish environment. Including G. japonica Stephensen, 1938, four Grandidierella species occur in the districts.
著者
Tomoyuki Miura
出版者
日本動物分類学会
雑誌
Species Diversity (ISSN:13421670)
巻号頁・発行日
vol.22, no.1, pp.7-27, 2017-05-25 (Released:2017-05-25)
参考文献数
17

A new classification is proposed for the Japanese species of the genus Lumbrinerides Orensanz, 1973 (Annelida: Lumbrineridae), based on the observation of as many specimens as possible so as to determine the extent of intra-populational variation of each morphological character. Morphological differences apparent in material from ten local sites were compared statistically among 16 tentative, operational taxonomic units, the morphologically recognizable units then being subjected to a taxonomic consideration with other known species. By their morphology, five species were recognized from Japanese waters, three being new to science. Diagnoses and descriptions of each species are given.
著者
Daisuke Shimada Atsushi C. Suzuki Megumu Tsujimoto Satoshi Imura Keiichi Kakui
出版者
The Japanese Society of Systematic Zoology
雑誌
Species Diversity (ISSN:13421670)
巻号頁・発行日
vol.22, no.2, pp.151-159, 2017-11-25 (Released:2017-12-05)
参考文献数
61

A new species of free-living marine nematode, Oncholaimus langhovdensis sp. nov., is described from the intertidal zone of Langhovde (near Syowa Station), Dronning Maud Land, East Antarctica. It closely resembles 11 congeners in the conico-cylindrical tail shape present in males and amphid and excretory pore positions, short spicules, and Demanian system structure present in females. However, it mainly differs from these congeners in body size, de Man’s ratios, tail length and shape, and Demanian system structure present in females. Oncholaimus langhovdensis sp. nov. also resembles four congeners known only by females, but it can be distinguished from them based on the tail length and uvette position. In addition to O. langhovdensis sp. nov., two undescribed species (Tripyloididae gen. sp. and Axonolaimidae gen. sp.) and four unidentified species (Sphaerolaimus sp., Oncholaimidae gen. sp., Comesomatidae gen. sp., and Chromadorida fam. gen. sp.) were found from the same locality.
著者
Daisuke Uyeno Hiroshi Senou Tadao Sakiyama
出版者
日本動物分類学会
雑誌
Species Diversity (ISSN:13421670)
巻号頁・発行日
vol.21, no.2, pp.135-142, 2016-11-25 (Released:2017-02-03)
参考文献数
12

A rare copepod parasitic on marine fish, Luetkenia elongata Shiino, 1963 (Siphonostomatoida: Pandaridae), is redescribed based on type specimens and additional specimens obtained from Luvarus imperialis Rafinesque, 1810 caught in the eastern and western North Pacific Ocean off California and Japan, respectively. This represents the first record of this parasite from Japanese waters. The copepod differs from its sole congener, L. asterodermi Claus, 1864, by following features of the female: fourth pedigerous somite with one pair of elongate posterolateral lobes; genital complex bearing a pair of well-developed posterolateral lobes with one conical protuberance on lateral corner; abdomen clearly longer than wide; and caudal rami more than 2.0 times longer than wide.
著者
Okamoto Makoto Matsuda Kouji Matsuda Tamaki
出版者
日本動物分類学会
雑誌
Species diversity : an international journal for taxonomy, systematics, speciation, biogeography, and life history research of animals (ISSN:13421670)
巻号頁・発行日
vol.15, no.3, pp.131-138, 2010-12-30

A pelagic juvenile (43.0mm standard length) of the morid Gadella jordani (Bohlke and Mead, 1951) was collected from Kagoshima Prefecture, southern Japan. It has a characteristically elongated body, long dorsal and anal fin bases with 73 rays in each fin, the anus located more anteriorly than the origin of the second dorsal fin, a ventral light organ, and no chin barbel. We describe the morphology of this specimen and also present a color photograph of it in life. This is the first report of any early life stage in this species.
著者
Teruaki Nishikawa Hironori Komatsu Yuichi Kameda Kenichiro Tani
出版者
日本動物分類学会
雑誌
Species Diversity (ISSN:13421670)
巻号頁・発行日
vol.22, no.1, pp.69-72, 2017-05-25 (Released:2017-05-25)
参考文献数
19

Two mature specimens of the whale-fall lancelet Asymmetron inferum Nishikawa, 2004, were collected in 2016 from reducing gravel bottom near a hydrothermal vent, 196 m deep, at Oomuro Hole of Oomuro-dashi submarine volcano in the Izu Islands, Pacific coast of Japan by using the ROV Hyper-Dolphin during the RV Shinsei-maru KS-16-6 cruise of JAMSTEC. This species has so far been known exclusively from whale-fall communities off Cape Nomamisaki, SW Kyushu, Japan, 219–254 m deep. The new find suggests the dispersal stepping-stone hypothesis of whale-fall communities for the origin of vent and/or seep fauna.
著者
Mizuki Matsunuma Mao Sato Yoshiaki Kai
出版者
日本動物分類学会
雑誌
Species Diversity (ISSN:13421670)
巻号頁・発行日
vol.22, no.1, pp.87-97, 2017-05-25 (Released:2017-05-25)
参考文献数
26

A poorly known sculpin, Atopocottus tribranchius Bolin, 1936 (Cottidae), was redescribed on the basis of 56 specimens from several localities in Japan; off Yamaguchi, Kyoto and Niigata Prefectures on the Japan Sea coast, and Kochi Prefecture on the Pacific coast, and in the northern East China Sea. The specimens from Yamaguchi, Kochi and the East China Sea represent the first specimen-based records for the species from those regions. Minute organs on the trunk surface, previously regarded as lateral-line pores, are most likely epidermal pits containing free neuromasts, and lateral-line pores are restricted to a row of embedded lateral-line scales on the anterodorsal portion of the body. Diagnostic characters of the monotypic genus, Atopocottus Bolin, 1936, are here reviewed on the basis of external and selected osteological characters, described for the first time. The genus is more similar to the Southern Hemisphere (Indonesia, Australia and New Zealand) genus Antipodocottus Bolin, 1952 than to Stlengis Jordan and Starks, 1904, known only from Japan, in having poorly developed cephalic sensory canals with few pores and the lateral-line scales in a simple canal without dorsal and ventral branches. However, Atopocottus differs from Antipodocottus in having fewer lateral-line scales (3–5 vs. 5–33 in the latter); the uppermost preopercular spine with 1–6 dorsal branches, their length and width becoming shorter and narrower, respectively, toward the spine tip, some of them with two spinous points (vs. 2–5 simple, similarly sized dorsal branches); and lacking a supraocular tentacle (vs. usually present). A more comprehensive examination of the two genera is necessary to determine their monophyly.
著者
Imamura Hisashi
出版者
日本動物分類学会
雑誌
Species diversity : an international journal for taxonomy, systematics, speciation, biogeography, and life history research of animals (ISSN:13421670)
巻号頁・発行日
vol.1, no.2, pp.123-233, 1996-12-31
被引用文献数
22 or 0

The phylogenetic relationships of Platycephalidae and its related taxa were analyzed. Platycephaloidei and Scorpaenoidei form a monophyletic group supported by two synapomorphies : presence of a backwardly-directed opercular spine and an extrinsic muscle derived from the hypaxial. Platycephaloidei and Plectrogenium, the triglids and peristediids are monophyletic, characterized by a posterior pelvic fossa. Bembradium and Plectrogenium constitute a monophyletic group, which divided initially from remainder of the clade. Next Parabembras, followed by Bembras, branched off the latter. Platycephalidae and its sister group, including the triglids, peristediids and hoplichthyids, have 4 synapomorphies. The triglids, peristediids and hoplichthyids share 15 apomorphies. The peristediids and hoplichthyids constitute a monophyletic group supported by 8 synapomorphies. The newly-defined suborder Platycephaloidei includes the following 7 families : Plectrogeniidae, Parabembridae, Bembridae, Triglidae, Peristediidae, Hoplichthyidae and Platycephalidae. Platycephalidae is redefined, being a monophyletic group supported by 6 synapomorphies, and including 2 subfamilies and 17 genera, 3 of them new.
著者
Tomikawa Ko Morino Hiroshi Ohtsuka Susumu
出版者
日本動物分類学会
雑誌
Species diversity : an international journal for taxonomy, systematics, speciation, biogeography, and life history research of animals (ISSN:13421670)
巻号頁・発行日
vol.13, no.4, pp.275-286, 2008-12-30
参考文献数
13
被引用文献数
2 or 0

Pseudocrangonyx shikokunis Akatsuka and Komai, 1922, a poorly known subterranean amphipod, is redescribed and illustrated in detail based on the syntypes from Tokushima Prefecture and four additional specimens from Hyogo Prefecture, Japan. Newly found diagnostic features and morphological variation of the species are discussed.
著者
Sau Pinn Woo Hiroshi Kajihara Nozomu Iwasaki Toshihiko Fujita
出版者
日本動物分類学会
雑誌
Species Diversity (ISSN:13421670)
巻号頁・発行日
vol.22, no.1, pp.45-52, 2017-05-25 (Released:2017-05-25)
参考文献数
12

The sea cucumber, Holothuria (Cystipus) dura Cherbonnier and Féral, 1981, previously known only from the Philippines and New Caledonia, is newly recorded from Japanese waters; this is also the first record of the subgenus Cystipus from Japan. The two specimens described here were collected from the sublittoral bottoms near Hahajima island (126–261 m depth) and Okinoshima island (100–120 m depth). The morphology of the Japanese specimens is briefly described. In-situ photographs of the living individuals and scanning electron micrographs (SEM) of ossicles are provided for the first time for this species. The table ossicles in the dorsal body and in the papillae are highly modified fenestrated spheroids that have not been depicted previously. Some of the ventrolateral conical papillae, especially those in the middle part of the body, were bifurcated, perhaps indicative of increased surface area against the bottom for powerful propulsion while ‘walking’. Some notes on locomotion are given, inferred from the in-situ photographs and the morphology of the ventrolateral conical papillae.