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Venus
日本貝類学会
Venus

日本貝類学会

1348-2955

Venus/Journal Venus
正式出版
收录年代

    Re-identifications of Two Freshwater Pearl Mussel Species Distributed in the Kamchatka-Sakhalin-Kuril-Japan Region Based on Morphological Comparison of Type Specimens (Bivalvia: Margaritiferidae)

    Harumi SakaiYoshihiro KuriharaTomoki Furuuchi
    20页
    查看更多>>摘要：Previous taxonomic and molecular studies demonstrated the existence of two distinct species of the freshwater pearl mussel genus Mararitifera in the Kamchatka-Sakhalin-Kuri 1-Japan region, but problems remained as to their identilication. To solve them, shells of nominal types and other voucher specimens were reexamined morphologically in detail and compared with Japanese populations using multivariate analyses. The results reconlirmed the importance of the shape of the dorsal edge of the anterior adductor muscle scar, and demonstrated the usefulness of the width of pseudocardinal teeth as a distinguishing character. Based on the results the previously accepted classification was revised: M. laevis (Haas, 1910) (Japanese name: Kawa-shinju-gai) is characterized by a rounded dorsal edge of the anterior adductor muscle scar and thin pseudocardinal teeth, and M. kurilensis (Zatravkin & Starobogatov, 1984) (Japanese name: Kogata-kawa-sninju-gai) is characterized by an ungulate dorsal edge of the anterior adductor muscle scar and robust pseudocardinal teelh. Margantifeni middendorffi (Rosdn, 1926), a name often applied to the latter species, is here considered a junior synonym of M. laevis, and M. togakushiensis Kondo & Kobayashi, 2005, often synonymized with M. middendorffi, is shown to be a junior synonym of M. kurilensis, judged From the morphology ol' the primary types.
      原文链接:
    • NSTL

    Taxonomic Re-examination of Limopsis belcheri (Bivalvia: Limopsidae)

    Takami Nobuhara
    10页
    查看更多>>摘要：Limopsis belcheri (Adams & Reeve, 1850) was based on a Samarang Expedition specimen from “off Cape of Good Hope, South Africa,120 fathoms'', hut 八tlams (1863) revised the type locality to “Korean Islands'' without specitying a reason. The placementof East Asian limopsids such as Limopsis tajimoe G. B. Sowerby III, 1914，L uwailokoi Oyama, 1951, and L. tokaiensis Yokoyama，1910 in synonymy with L. belcheri by recent workers has caused confusion. This study reexamines the ligured syntype of L. belcheri and corrccls its synonymy, focusing on Recent specimens. Limopsis belcheri is confirmed to he a distincl spccies from L tajimae, L. uwcidokoi and L tokaiensis, distinguishable by 1)the serrated crciuilalion along the inner ventral margin, and 2) a resilifer pit filled only by a fibrous layer. All figures so far identified as L belcheri from Japan, Korea, and China disagree with the inner shell characters of this syntype. In contrast, the South African species Limopsis chuni Thiele & Jaeckol, l931 agrees with it in both outer and inner shell characters, and should be synonymi/ed. These ohscrvalions support the proposal lhal the type locality of Limopsis belcheri should be olT the Cape ol Good I lope, as noled in the original description, and not the revised locality proposed by Adams (IS63).
      原文链接:
    • NSTL

    琵琶湖産カワニナ属4種の核型

    高見明宏
    10页
    查看更多>>摘要：現在の琵琶湖には，3っの島嶼（沖島，竹生島，多景島）と沖の白石という岩礁が存在してい る。沖島には，集落が形成されており，漁業活動が行われており，近江八幡市堀切新港から定期 船が就航している。竹生島ゃ多景島には寺社があり，定期船が就航しているが，夜間には無人島 となっている。沖の白石では，岩礁部が湖面から突出しているだけである。これらの島嶼等は， 琵琶湖岸から1_5-5 km離れており’互いに5 km以上離れており，その間には水深40 m以上の 水域が存在している。イシガイ目貝類では，幼生期に魚類に寄生して分散する習性が報告されて いるが(Kondo, 2008),力つニナ属Semisul.cospimの良獄は' _胎生であり，仔貝を水中に算出す るため，分散能力は，二枚貝類に比べて小さいと考えられる。現在では，それぞれの島嶼等間で は，ヵワニナ科の生息に連続性はないと考えられる。これらの島嶼等の周辺には，ヤマトヵワニ. ナS. niponica (Smith, 1876)の生息が確認されている（Watanabe & Nishino，1995)。竹生島や多景 島周辺からモリ力ワニナS. morii Watanabe, 1984,多景島周辺からタケシマカワニナ兄 tcikeshimaensis Watanabe & Nishino, 1995,沖の白石からシライシカワニナカワニナshiraishiensis Watanabe & Nishino, 1995 の生息が報告されている（Watanabe & Nishino, 1995)。
      原文链接:
    • NETL
    • NSTL

    A New Tiny Protobranch Bivalve from Sagam! Bay，Japan

    Talcashi OlcutaniKatsunori Fujikura
    4页
    查看更多>>摘要：The bathyal bivalve fauna of Sagami Bay has been well documented in a series of studies based on collections by the R/V Soyo-Mciru (Okutani, 1962，1966, 1968, 1985) and other inventories (e.g., Kuroda et al., 1971; Okutani, 2006).The ROV Hyper-Dolphin(HD) of the Japan Agency for Marine-Earth Science & Technology made several dives in Sagami Bay in 2009 for ecological and phylogenetic studies of the chemosynthetic vesicomyid bivalves in the bay. Some tiny bivalve specimens were sorted from biologicalsamples collected by the ROV on the southeastern slope of Hatsusliima Islet and the western slope of the Okinoyama Bank (Fig.1).Close examination resulted in confidence that they belong to an undescribed species of the protobranch genus Yoldiellci Verrill & Bush, 1897. The description of the new species goea below.
      原文链接:
    • NSTL