著者

今泉 吉典 吉行 瑞子

出版者

国立科学博物館

雑誌

Bulletin of the National Science Museum. Series A, Zoology (ISSN:03852423)

巻号頁・発行日

vol.15, no.3, pp.177-188, 1989-09

被引用文献数

1

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A new species of the subgenus Lutra BRISSON, 1762,of the genus Lutra is described from Shikoku in Japan under the name of L. nippon. It is a primitive species with relatively long tail and long facial portion of cranium among the Eurasian species of the subgenus Lutra.

著者

今泉 吉典

出版者

日本哺乳類学会

雑誌

哺乳動物学雑誌: The Journal of the Mammalogical Society of Japan (ISSN:05460670)

巻号頁・発行日

vol.2, no.1, pp.17-22, 1961-10-05 (Released:2010-08-25)

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An imperfect body with a complete skull of Crocidura dsinezumi orii Kuroda 1924, was found in a stomach of Trimeresurus okinavensis, which was colleced in July, 1960 by Mr. T. Morita and Dr. K. Koba at Yuwandake, Amami-Oshima, Japan. It is the second and unique specimen of orii, because this form has only been known by a type, a skin and an imperfect skull, collected in 1922 and destroyed by fire in 1945. The second specimen, adult male, is easily distinguished from russula, sodyi, tanakae, thornasi, dsinezumi, umbrina, chisai, shantungensis, watasei and tadae by relatively longer fur of the back (6.0-6.5 mm against 2.5×5.0 mm), decidedly larger claws of manus (2.7 mm against 1.1-1.8 mm), much shorter braincase (nearly circular against oblong), and posteriorly located posterior border of anteorbital foramen and anterior extremity of orbit. Therefore, this form may not be a subspecies of dsinezumi but a distinct species, Crocidura orii, peculiar to the small island.

著者

吉行 瑞子 今泉 吉典

出版者

国立科学博物館

雑誌

Bulletin of the National Science Museum. Series A, Zoology (ISSN:03852423)

巻号頁・発行日

vol.12, no.4, pp.185-193, 1986-12

被引用文献数

2

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A new species of red-toothed shrew belonging to the caecutiens-arcticus section of the Sorex minutus group is described from Sado Island, under the name Sorex sadonis, The species is similar to Sorex arcticus KERR, 1792 in having a large skull and massive teeth, but the 2nd lower tooth has a secondary cusp and the lateral pelage is much darker than the ventral. This species is easily distinguished from Sorex shinto shinto THOMAS, 1905 from Honshu, Sorex shinto saevus THOMAS, 1907 from Hokkaido, and Sorex shinto shikokensis ABE, 1967 from Shikoku, Japan, by the much bigger claws of the forefoot and the decidedly darker coloration.

著者

今泉 吉典

出版者

THE MAMMAL SOCIETY OF JAPAN

雑誌

哺乳動物学雑誌: The Journal of the Mammalogical Society of Japan (ISSN:05460670)

巻号頁・発行日

vol.5, no.1, pp.27-32, 1970

被引用文献数

1

---

The type specimen of <I>Canis hodophilax</I> TEMMINCK, 1839, is a mounted skin'a'and a skull'c'of old male collected from Japan by BÜRGER in the collection of Rijksmuseum van Natuurli jke Historic, Leiden. The skull can be distinguished rather easily from those of related forms by a combination of following characters : remarkably short condylobasal length, well developed auditory meatus external to postglenoidal foramen, emarginated anterior border of pterygoid fossa and well balanced skull jointed with mandible when put them on a horizontal surface. Based on these key characters, specimens from Japan which have been known as"<I>hodophilax</I>"were reexamined and identified as follows : a skull ('b', ad.) in Rijksmuseum, a skin and a skull from Nara (5.5.30.1, _??_ subad.) in British Museum, Nat. Hist., and a mounted skin and a skeleton from Fukushima (M 100, _??_ subad.), a skull from Fukui (M 1185, ad.) and a semifossil skull from Kumamoto (P 9792, old) in National Science Museum, Tokyo, are undoubtedly of <I>hodophilax</I>, but a skeleton ('a', _??_ ad.) in Rijksmuseum may not be of this species but of a Japanese domestic dog.

著者

今泉 吉典

出版者

日本哺乳類学会

雑誌

哺乳動物学雑誌: The Journal of the Mammalogical Society of Japan (ISSN:05460670)

巻号頁・発行日

vol.6, no.3, pp.127-136, 1975-03-30 (Released:2010-08-25)

参考文献数

13

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Lutronectes whiteleyi GRAY, 1867, based on two young specimens collected from Hakodate, Hokkaido, Japan, seems to be extinct in the native land, and no specimens have been known in Japan.While studying the river otter of Japan, the author was attracted his attention by an adult rough skeleton of the subgenus Lutra in the mammal collection of the National Science Museum, Tokyo. Unfortunately the locality of the specimen is uncertain, but there is little doubt that it was collected at the beginning of the Mei ji era, nearly 100 years ago, in the territory of Japan at that time, that is Hondo or Hokkaido. As the specimen is evidently different from the otter of Hondo, the locality is inevitably estimated as Hokkaido.This estimation coincides with the result of identification of the specimen as Lutra whiteleyi based on strong similarities to OGNEV's adult specimen from Nemuro, Hokkaido, and dissimilarities to the most of the named forms of the subgenus Lutra, in several cranial measurements.If this identification is correct, whiteleyi seems to be a well established taxon of Lutra lutra group characterized by relatively narrow mastoid breadth and shorter muzzle (Table 6, F and G) .An opinion that whiteleyi covers whole populations of the Japanese otter, proposed by Pococx (1931), the present author (1949), etc., is not correct. L. whiteleyi must be confined to the Hokkaido population.

著者

山階芳麿宇田川竜男今泉吉典著

出版者

日本農林社

巻号頁・発行日

1954

著者

今泉 吉典 遠藤 公男

出版者

THE MAMMAL SOCIETY OF JAPAN

雑誌

哺乳動物学雑誌: The Journal of the Mammalogical Society of Japan (ISSN:05460670)

巻号頁・発行日

vol.1, no.6, pp.127-132, 1959

著者

今泉 吉典

出版者

国立科学博物館

雑誌

自然科学と博物館 (ISSN:03857727)

巻号頁・発行日

vol.18, no.1, pp.1-9, 1951-01

著者

今泉 吉典

出版者

国立科学博物館

雑誌

国立科学博物館研究報告 (ISSN:00280119)

巻号頁・発行日

vol.12, no.2, pp.173-178,図1枚, 1969-05

著者

今泉 吉典

出版者

国立科学博物館

雑誌

国立科学博物館研究報告 (ISSN:00280119)

巻号頁・発行日

vol.2, no.1, 1955-03

著者

今泉 吉典

出版者

国立科学博物館

雑誌

自然科学と博物館 (ISSN:03857727)

巻号頁・発行日

vol.27, no.3, pp.20-28, 1960-06

著者

今泉 吉典

出版者

国立科学博物館

雑誌

国立科学博物館専報 (ISSN:00824755)

巻号頁・発行日

vol.6, pp.113-129, 1973

被引用文献数

4

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Although the wild boar of the Ryukyu Islands, Japan, has long been recognized as a local race of Sus scrofa LINNAEUS, 1758,by most of the recent authors, it may be a relict nearly related to the common ancestor of the boars. According to the author's opinion, Sus scrofa itself is a superspecies containing such distinct species as cristatus, scorofa, meridionalis, vittatus, leucomystax and riukiuanus. Each of the last three forms of East Asia undoubtedly belonging to a clade, the vittatus group, is in different stage of phylogenetic sequence and seems to have independent history of expansion of the population in the past. It is most likely that such populations have been reproductively isolated from each other more or less completely and that severe competition for existence may have taken place when they meet in a given area. The present distribution of those species must be a final result of such competitions reflecting the presence of reproductive isolation between them. This is the reason why the author is inclined to erect them as distinct species. The wild boar of the Ryukyu Islands, Sus riukiuanus KURODA, 1924,will be recognized on the following cranial and dental characters : upper length of skull as large as that in a cline of leucomystax TEMMINCK, 1942,from Honshu and Kyushu, Japan, Yc=153.8+4.9Xmm, Sys=15.9mm (X=temperature index), and much smaller than that of vittatus BOIE, 1828,Yc=302.0+2.4Xmm, Sys=19.4mm, which contains populations from Ussuri, Manchuria, Korea, Szechwan, Fukien, Formosa, Johore, Sumatra, Java, etc. Second and third upper molars smaller and simpler, and auditory bulla smaller than those of leucomystax. Naso-premaxillary suture incomplete except in old stage, and condyle and angular portion of mandible less developed. Those characters are most clearly retained in the population of Iriomote Island. The cranial and dental characters of the native domestic pig of Hainan, China, are distinctly in primitive conditions than those of vittatus and leucomystax, but evidently in progressed stage of phylogenetic development than in riukiuanus. The opinion of some authors that riukiuanus may only be a feral domestic pig seems not to be acceptable.

著者

吉行 瑞子 今泉 吉典

出版者

国立科学博物館

雑誌

Bulletin of the National Science Museum. Series A, Zoology (ISSN:03852423)

巻号頁・発行日

vol.17, no.2, pp.101-110, 1991-06

被引用文献数

7

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A new species of the genus Mogera is described from the Echigo Plain in central Japan under the name of Mogera etigo. It is similar to M. tokudae from Sado Island in such primitive characters as vertebral formula and shape of muzzle pad, but is different from M. tokudae in much larger relative values of body and cranial dimensions, larger manus, and smaller upper and lower second premolars, the last feature of which seems to indicate relatively advanced stage of evolution.

著者

今泉 吉典

出版者

国立科学博物館

雑誌

国立科学博物館研究報告 (ISSN:00280119)

巻号頁・発行日

vol.5, no.4, pp.163-259, 1962-03

著者

今泉 吉典

出版者

国立科学博物館

雑誌

国立科学博物館専報 (ISSN:00824755)

巻号頁・発行日

vol.3, pp.159-176, 1970

被引用文献数

3

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Among thirteen land mammal forms known from the Tsushima Islands, ten are undoubtedly native and three are commensal. Four groups are recognized among the native forms. 1. Korean forms, which are common to Korea but not found in Hondo, the mainland of Japan, in specific level : Crocidura suaveolens shantungensis, Mogera coreana, Mustela sibirica manchurica, Prionailurus bengalensis euptilurus. 2. Forms which are common both to Korea and Hondo in specific level : Micromys minutus aokii, Martes melampus tsuensis. 3. Japanese forms, which are common to Hondo in specific level, but not found in Korea : Apodemus navigator tusimaensis, Apodemus argenteus sagax. 4. Endemic species : Urotrichus adversus, Cervus pulchellus. Any taxonomic differences have never been discovered between specimens of the "Korean forms" and those from Korea. This may suggest that the Tsushimas had a land connection with Korea not in so remote past. The forms belonging to the second group seem to be intermediate between Korean and Japanese forms in subspecific level. "Japanese forms" evidently differ subspecifically or specifically from those of Kyushu, which are in the nearest districts of Hondo from the Tsushima Islands. Lineages, or phylogenetic branches, within Urotrichus were tried to be detected by statistical comparison of relative sizes between several local populations and a cline of well established form, U. hondonis (Figs. 1-5). By those clinal analysis, based on the author's taxonomic principles, at least four lineages were recognized in the group. According to sequence of expansions of forms in the past, which can be estimated by present distributions and degrees of morphological specializations or grades in strength, those lineages can be divided into classes, such as the most recent : lineage A, the next : lineage B, etc. Urotrichus adversus from Tsushima seems to belong to the lineage B, evidently older than U. talpoides of Kyushu belonging to the lineage A. Apodemus navigator tusimaensis is rather similar to navigator of Oki Is. and dorsalis of Yaku and Tane Is., which probably belong to the lineage B and are different from speciosus of Hondo belonging to the lineage A. Thus, most of the "Japanese forms" of Tsushima may not be derived from populations of Kyushu, belonging to the lineage A, but may perhaps be the relics of formerly widespread forms.

著者

今泉 吉典

出版者

THE MAMMAL SOCIETY OF JAPAN

雑誌

哺乳動物学雑誌: The Journal of the Mammalogical Society of Japan (ISSN:05460670)

巻号頁・発行日

vol.4, no.4, pp.102-106, 1969

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オオシマアカネズミの標本95点を調査した結果,次のことが判明した。(1)夏毛と冬毛は背毛では刺毛の有無により,腹毛では色彩によってほぼ判定することができる。(2)更毛は年2回,4・5月と10・11月に行なわれる。(3)腹毛には夏毛・冬毛ともほぼ2つの色型があり,冬毛よりも夏毛の方が明らかに濃色である。(4)腹毛の色彩は夏毛・冬毛とも♂ よりも♀のほうが濃色の傾向が強い。

著者

今泉 吉典

出版者

国立科学博物館

雑誌

国立科学博物館研究報告 (ISSN:00280119)

巻号頁・発行日

vol.12, no.2, pp.255-272,図2p, 1969-05

著者

吉行 瑞子 今泉 吉典

出版者

農大動物研究会

雑誌

Animate (ISSN:13451987)

巻号頁・発行日

no.4, pp.69-72, 2003-09

著者

今泉 吉典

出版者

国立科学博物館

雑誌

国立科学博物館研究報告 (ISSN:00280119)

巻号頁・発行日

vol.4, no.4, pp.362-371, 1959-10

著者

国岡 宣之 今泉 吉典

出版者

日本哺乳動物学会

雑誌

哺乳動物学雑誌 (ISSN:05460670)

巻号頁・発行日

vol.7, no.1, 1976-11