出版者
慶應義塾大学
雑誌
斯道文庫論集 (ISSN:05597927)
巻号頁・発行日
vol.28, pp.359-368, 1993-12-31

松本隆信名誉教授追悼記念論集
著者
今泉 吉典
出版者
裳華房
雑誌
遺伝 (ISSN:03870022)
巻号頁・発行日
vol.36, no.5, pp.p4-8, 1982-05
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

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
国立科学博物館専報 (ISSN:00824755)
巻号頁・発行日
vol.3, pp.159-176, 1970
被引用文献数
3

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
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.1, pp.84-91, 1968
被引用文献数
2

Three hundred specimens of small mammals, belonging to 10 species, were collected in Mt. Goyo (about 15km west of Kamaishi City, Iwate Pref.) and Mt. Hayachine (about 40km southeast of Morioka City, Iwate Pref.) during a short trip in the early summer of 1967. The most interesting mammals among them was Euroscaptor mizura mizura (GUNTHER, 1880) which was collected at the upper part of Tatamiishi (1100m alt.), Mt. Goyo. The subspecies is a rare animal in Japan and the specimen obtained here is the 8th record from the country, and, at the same time, new to the Tohoku district, Honshu. One of the most difficult problems of taxonomy among the Japanese small mammals is the status of Aschizomys andersoni (THOMAS, 1905) from northern Honshu. Twenty-one specimens of this species were collected during the trip to Mt. Goyo and Mt. Hayachine, and studied statistically by a simplified method employing the association coefficient in numerical taxonomy. The dendrogram (Fig. 1) made by the method clearly expresses the similarity of the Goyo-Hayachine populations to the population from Mt. Zao and, onthe other hand, the distinction between them and the other populations of central Honshu. These morphological relationships and the differentiation of the vertical distribution recognized among groups of Aschizomys in Honshu indicate the specific distinction of Aschizomys andersoni, which is represented by the populations of Mt. Goyo, Mt. Hayachine or Mt. Zao, from A. niigatae of central Honshu. The small mammal fauna of Mt. Goyo is peculiar among those of mountains of the Tohoku district in having the combination of Euroscaptor mizura mizura and Aschizomys andersoni, while that of Mt. Hayachine seems to be similar to the latter, although it could not be fully clarified by the present survey.
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

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.