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Fiampt Occurence of Cnathqpoma (Cyclophoridae)

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Fiampt Occurence of Cnathqpoma (Cyclophoridae) The malacologicalsocietymalacological society of Japan fire VENUS (Jap, Jour. Malac.) VoL 39, No. 1 (1980):15-16 " H 1sck:eecosi 7 7 s £ 7Ae ? pt = v/ fiaMpt us ?z Occurence of CNathQPoma (Cyclophoridae) in Kyushu, Japan Hiroshi MiNATO (Kumano Senior High School, Kamitonda-cho, Wakayarna-ken) The genus Cyathopoma (Cyclophoridae) has been known from India, Islands of Indian Ocean and Formosa, but has nover been reported from Japan until today. Fortunately, Mr. H. NisHINo has eollected a new speeies of this genus, C. nisltinoi, for the first record of the genus from Japan. I wish to express my sineere thanks to Drs. [I]. KuRoDA and T. HABE, for their kindness of affording me with the Formosan gpecimens and literature. Hearty thanks are also due to Mr. H. NIsHINo, who kindly placed his materials at the author's disposal. Clyathopama W. & H, BLANFoRD, 1861 Cyathopoma nishinoi n. sp. (Figs. 1---2) Shell minute, conic, umbilicate, thin, yellowish eorneous, translueent. Whorls 41,Si in number, each whorl very eonvex with a deep suture. Protoconch ll6 whorls, smooth, dark corneous and the teleoconch whorls ornamented with strong spiral lines, 5 at penultimate whorl and 5 to 6 at body whor}. Spiral lines eroded en the base of the body whorl, exeept for the umbilieal area. Periphery rounded. Aperture circular, peristome simple, thin and cling to the body whorl. Operculum round, yellowish white, calcareous, multispiral and sunken to the central on the outer surface. Measure"ien･ts: Height 1.4mm, breadth 2.0rnm (Holotype, NSMT-Mo 57453) Height 1.3mm, breadth 1.9mm (Paratype, MINATo Colleetion No. 20413) Type Locality: Mt. Kadoyama, Fukuregi, Amakusa-eho, Amakusa-gun, Kumamo- to-ken, Kyushu. Re･maTks: This species is closely related to Cyathopoma taitvanicu･m PILsBRy & HIRAsE, 1905, from Formosa (=Taiwan), but is distinguished from it by smaller size and lacks in spiral lines on the base of the body whorl. This speeific name is dedieated honour in of the Mr. H. NIsHINo, the first diseoverer of the present .specles. NII-Electronic Library Service The malaoologioalmalacological societysooiety of Japan 16 VENUS ： VoL 39， No ．1 （1980 ） − マ マ ニ シ Fig8 ．1 2 ． CyathoPoma nishinoi n ． sp ． イ ト キ ミ ジ ン ヤ タ Holotype， H 1，4mmxB2 ． O mm 3 ． C ．taiwanicum PILSBRY ＆ HIRAsE ，1905 タ イ ワ ン ミ ジ ソ ヤ マ タ ニ シ mm Formosa Type H1 ．7rnmXB2 ．3 ，Specimen from Girarl， （ locality） 4 。 2＞akadaetla micron （PILSBRY ，1900 ） ミ ジ ン ヤ v タ ニ ン × 皿 Amami HL4mm B l．8 m ，Specimen from Mt ．Yuwan ， Oshima Island， Japan て い タ イ ワ ン ミ ジ ソ ヤ マ タ ニ シ 属 イ ン ド，イ ン ド 洋 上 の 諸 島 ， 台 湾 な ど か ら 知 ら れ た ’ の it ：か の 種 と 比 し て 新 種 と認 め た の Cyathopama の 種 が ， 九 州 ．天 ） ら発 見 され ， 下 記 諸 較 ー で ， （：yathoPoma nishinoi n ． sp ． イ ト マ キ ミ ジ ン ヤ “ タ ニ シ （新 称 ） と し て 記 載 し た 。 〜 ’ こ の 新 種 は 殻表 に 5 6 条 の 螺 状 脈 を 有 す る が ， Nahadaella micron （PILSBRY ， 1900） ． ミ ン マ ニ シ CyathoPom α ジ ヤ タ は 殻 表 が 平 滑 で あ る の で 異 な る 。 ま た 本 新 種 は 台湾 産 1905 タ イ ワ ン ミ ジ ン ヤ マ タ ニ シ よ り小 形 で あ る こ taiwanicum PILsBRY ＆ HIRASE ， こ で で る と ， 体 層 底 面 に 螺状 脈 を 欠 く と 区 別 き 。 模 式産 地 ： 熊 本 県 天 草郡 大 草 1町福 連 木 角 山 測 定 ： 殻高 1．4mm ，殻 径 2 ．Omm （模 式 標 本 ） ． 殻 高 1．3mm ， 殻 径 1 9mm （副 模 式 標 本 ） Literature cited it adjacent regions ． ？zs ．19 2 ： KuRo1 ）A T ．1956 ． 1」 and shell fauna of Japan and Ven （ ） ， 132 − 146 ，（In Japanese ） H A ． ＆ HIRAsE Y ．190 ．5． Catalogue of 七he land and fresh−water Mollusca PILsBRY ， ， ， ， ， ・’ ’ of Taiwan （Formosa ）， with deseriptions of new species ． P T oc ． Ac α d． N α オ．8 α ． − P 九4〜α ．，57 ： 720 752 ． − Palttozeologie ． Band 6 Teil 6 Gastropoda ， 465 466 ． WENz W ，1961 ． Handbuch der ， （ ） ， 一 NII-ElectronicN 工 工 Eleotronio Library Service.
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