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Palaeontological Society of Japan lSSj\) UU31 -ULU4 Transactions and Proceedings of the Palaeontological Society of Japan New Series No. 116 Palaeontological Society of Japan December 30, 1979 Co-Editors I taru HAY AMI and Tsunemasa SAITO Associate editor Tomowo OZAWA Officers for 1979-1980 President: Tetsuro HANAI Councillors: Kazuo ASAMA, Kiyotaka CHINZEI, Takashi HAMADA, Tetsuro HANAI, Itaru HAYAMI, Hisayoshi IGO, Kametoshi KANMERA, Tamio KOTAKA, Ta­ tsuro MATSUMOTO, Ikuwo OBATA, Tsunemasa SAITO, Tsugio SHUTO, Yokichi TAKAYANAGI, Toshimasa TANAI, Ryuzo TORIYAMA Members of Standing Committee: Kazuo ASAMA (Finance), Kiyotaka CHINZE I (General Affairs), Takashi HAMADA (Planning), Itaru HAY AMI (Transactions), Hisayoshi IGO (Foreign Affairs), Ikuwo OBATA (Membership), Tsunemasa SAITO (Transactions), Tsugio SHUTO (Special Papers), Yokichi TAKA YANAGI ("Fossils") Secretaries: Hiromichi HIRA NO and Yasumitsu KANIE (Membership), Kunihiro ISH I­ ZAKI ("Fossils"), Tomowo OZAWA (Transactions), Toshiyuki YAMAGUCHI (General Affairs), juichi YANAGIDA and Ienori FUJIYAMA (Special Papers) Auditor: Sumio SAKAGAMI The fossil on the cover is Nipponitella explicata HANZAWA, an aberrant uncoiled fusulinacean from the Lower Permian Sakamotozawa Formation, southern Kitakami, Northeast japan. All communications relating to this journal should be addressed to the PALAEONTOLOGICAL SOCIETY OF JAPAN, c/o Business Center for Academic Societies, Yayoi 2-4-16, Bunkyo-ku, Tokyo 113, Japan. Sole agent: University of Tokyo Press, Hongo 7-3-1, Tokyo, japan. Trans. Proc. Palaeont. Soc. japan, N. S., No. 116, pp. 175-178, pI. 24, December 30, 1979 708. KIDOA, EINE NEUE DIATOMEEN-GATTUNG AUS DEN OBERNEOGENEN KOITOI SCHICHTEN, TENPOKU, HOKKAIDO* SEIICHI KOMURA japan Petroleum Exploration Co., Ltd. (JAPEX), Chiyoda-ku, Tokyo 100 Abstract. Kidoa graviarmata, n. gen., n. sp. (araphid diatom) is described from the Koitoi Formation (Upper Neogene) in the Tenpoku district, japan. Systematische Beschreibung Einleitung Ordnung Pennales SCHUTT, 1896 Bei der Untersuchung der marinen Mikrofossilien aus den neogenen Ablager­ Familie Fragilariaceae ungen, die im Nordtenpoku Gebiet SCHUTT, 1896 umfangreich verbreitet sind, im Zusam­ menhang mit der Suche von Erdol und Gattung Kidoa, n. gen. -gas hat der Verfasser eine neue bogen­ Namengebung: Herrn Hideo Kmo, formige Kieselalge, die von den bereits Direktor von Sakhalin Oil Development bekannten Gattungen vollstandig unter­ Corporation Co., Ltd. in Verehrung ge­ schieden werden kann, neulich gefunden. widmet. In dieser Arbeit beschreibt und illu­ Typusart: Kidoa graviarmata, n. sp. striert der Verfasser die neue Gattung, Diagnose: Theken in Valvarebene mit Kidoa, die zur Familie Fragilariaceae Apikalachse gewolbt, in Gurtelansicht gehOrt. Viele gut erhaltene Exemplare linear-rechteckig, mit den am Pol stehen­ aus den in den Aufbissen gesammelten den derben Fortsatzen, ohne Zwischen­ Materialien wurden fur die Diagnose bander und Septen ; Schalen dorsoventral, und Beschreibung der neuen Gattung mit starker gewolbtem Ruckenrand, und Art verwendet. Alle Exemplare, linear-Ianzettlich im UmriB, unsym­ die in den Praparaten durch Pleurax metrisch zur Apikalebene, mit rand- eingebetteten wurden, werden im Techni­ standige Stacheln und regelmaBig schen Institut von JAPEX aufbewahrt. geordneten transapikalen Streifen ; Apikalarea vorhanden aber Zentralarea fehlend. Bemerkungen: Die bilaterale Struktur­ anordnung und das Fehlen des Raphen­ * Received May 26, 1978; revised manuscript systems rechtfertigen die Gehorigkeit received Sept. 11, 1979; read june 18, 1977 dieser neuen Gattung zur Familie at Shizuoka. Fragilariaceae. Diese Gattung besitzt 175 176 Seiichi KOMURA derselben Weise wie die Arten von 142'0 Campylosira GRUNOW (vgl. HUSTEDT, 1927-64, S. 128) Cymatosira GRUNOW (vgI. HUSTEDT, op. cit., S. 123) durch Bildung der bandformig geschlossenen Kolonien leben mu.Bte. Kidoa graviarmata, n. sp. Tafel 24, Fig. 1-8; Abb. 2, Fig. 1-6 TENPOKU-GEBIET Namengebung: gravis (lateinisch, adv.) =wichtig+armo (lat.)=bewaffnen, nach den durch viererlei Strukturelementen ganz ausgeriisteten Theken. Holotypus: Praparat Nr. JAPEX Fo- 4S'N --\---}~--t----- 11(34)= 14.1 X 78.5(Fm15636, 15635, 15634), Taf. 24, Fig. 1, Abb. 2, Fig. l. Paratypen: Praparat Nr. JAPEX Fo- 11(31)= 18.3 X 90.3(Fm15630, 15631), Taf. 24, Fig. 2, Abb. 2, Fig. 2; Praparat Nr. JAPEX Fo-11 (23) = 19.0 X 90.2 (Fm 15645, 15644), Taf. 24, Fig. 3, Abb. 2, Fig. 6; Praparat Nr. JAPE X Fo-11(25)=13.2X89.8(Fm15642, 15640), Taf. 24, Fig. 4; Praparat Nr. JAPEX Fo-11(14)=8.6x86.0 (Fm 15628), Taf. 24, Fig. 5; Praparat Nr. JAPEX Fo-11(34)=7.2x92.9(Fm15633,15632), Taf. a 10 lorn !===~[=~[ 24, Fig. 6; Praparat Nr. JAPEX Fo-11(40) =9.1x83.0(Fm15626), Taf. 24, Fig. 7, Abb. Abb. 1. Lage des Fundpunktes 2, Fig. 3; Praparat Nr. JAPEX Fo-11(70) =5.3x 132.0 (Fm 16958), Abb.2, Fig. 4; Praparat Nr. JAPEX Fo-11(68)=1l.0x vier folgende Eigentiimlichkeiten: 1) 138.3(Fm16988), Abb. 2, Fig. 5. derbe Fortsatze am Pol, 2) dichtstehende Material: 10 Exemplare. Stacheln am Rande, 3) krammerformiger Typusfundort: Fo-11, Bodenaufschlu.B Schalenumri.B und 4) kurze Streifen auf (Abb. 1), etwa 3,8 km siidostlich von der Oberfiache. Sie besteht im wesentlich Toyotomi (Breitengrad 45'5'14/1N, Lan­ in nachster Verwandtschaft mit der gengrad 141'19'17/10). Gattung Campylosira, die drei erstere Typusschichten: Aschenreicher Kiesel­ Charakteristiken besitzt und sich von gur der Koitoi-Schichten, Oberstmiozan ihr durch die regelma.Big punktierte (vgl. MINATO et aI., 1956; NAGAO, 1960). Ornamente unterscheidet. Beschreibung: Theken in Giirtelansicht Aus Analogie mit den ahnlichen eng-linear, mit gro.Ben derben pedalahn­ Genera mit Fortsatzen und Stacheln la.Bt lichen an den Polen stehenden Fort­ sich vermuten, da.B die lebende Zelle in satzen, die in der schragen Valvarlage 708. Kidoa, eine neue Diatomeen-Gattung 177 daher etwas konvergent, tiber die ganze Oberflache auBer dem hyaIinen Apikalfeld verbreitet, von Pseudoraphe unterbrochen, 8-9 in 10 f1-; Axialarea oder Pseudoraphe sehr eng, fadenahnIich jedoch deutIich, in der MitteIIinie verIaufend. Bemerkungen : Die vorIiegende Art zeigt eine bedeutende RegelmaBigkeit und Einheitlichkeit in der Anordnung der Streifen und StacheIn, wie die mikro­ photographischen Aufnahmen (Taf. 24, Fig. 5 und 7) deutlich zeigen. Sie tritt selten oder zwar meistens als Bruchstiick DO. in den Tenpoku-MateriaIien auf, aber 0'"0<0 om sie kann durch ihre bogenfOrmigen ~~ om SchaIen mit den unnachahmIichen om DO StacheIn leicht aufgefunden werden. f Do Do Do DO DO DO o Danksagung 2 3 4b 5 6 Der Verfasser ist Herrn Dr. Y. IKEBE, Abb. 2. Kidoa graviarmata, n. sp. Vizeprasident von JAPEX, fUr seine Erlaubnis dieser Ver6ffentIichung und Herrn F. AKIBA von JAPEX fUr seine fruchtbare Diskussionen zu groBem best sichtbar sind und in der Giirtellage Dank verpflichtet. als ungebuckelte Schragflache erscheinen (Taf. 24, Fig. 7 u. Abb. 2, Fig. 4b); Schalen verlangert, eng-linear bis linear­ Literatur Ianzettlich, dorsoventral, gegen den GLESER, S.1. et al. (1974): Diatomovye vodo­ PoIenden allmahlich verschmaIert, flach rosli SSSR, Bd. 1. 1-4, 5-400, 401-404, in AxiaIrichtung doch im Querschnitt Abb. 1-16, Taf. 1-20, 1-93. NAUKA, etwas gew6Ibt, mit stumpf bis scharf Leningrad. gerundeten, nicht geschnabeIten, doch HUSTEDT, F. (1927-64): Die Kieselalgen seIten etwas kopfig geschwollenen Apika­ Deutschlands, Osterreichs und der Schweiz Ienden und auch mit geraden oder wenig mit Beriicksichtigung der iibrigen Lander konkavem Bauchrand und starker, vor Europas sowie der angrenzenden Meeres­ den Polenden pI6tzlich noch starker gebiete: in Rabenhorstes Kryptogamen­ konvexem Riicken, 29-69 f1- lang, 4-5 f1- Flora von Deutschland, Osterreichs und breit; marginale Stacheln entIang der Schweiz, 7. (1): 1-920, Abb. 1-542, (2) : 1-736, Abb. 1-1105, (3): 1-556, Abb. SchaIenrand, in der VaIvarIage aIs ob 1-411, Leipzig. Punkt erscheinend, gleichentfernt und KARSTEN, G. (1928): Bacillariophyta (Dia­ dicht liegend, mit transapikalen Streifen tomeae) : in ENGLER, A.u. PRANTL, K., abwechseInd, 8-9 in 10 f1-; Streifen sehr Die natiirlichen Pflanzenfamilien, 2. 105- kurz, punktiert, aus 1-3 Punkten be­ 303, Fig. 93-424, Verlag von Wilhelm stehend, zur Apikalachse senkrecht und Engelmann, Leipzig. 178 Seiichi KOMURA MINATO, M. et al. (1965): The geologic SHESHUKOVA·PORETZKAJA, V.S. (1967) : Neo· development of the japanese Islands. genovy morskie diatomovye vodorosli i·xxv, 1-442, Taf. 1-30, Abb. 1-26, Tab. Sakhalina i Kamchatki. Izd. LCU, 1-327, 1-25, Tsukijishokan, Tokio. Taf. 1-50, Abb. 1-9, Tab. 1-19. NAGAO, S. (1960): Explanatory text of the v AN HEURCK, H. (IS96): A treatise on the geological map of japan, Toyotomi. Ceol. Diatomaceae. (iibergesetzt von W.E. Surv. Hokkaido, 1-42, Photo. 1-20, Taf. Baxter). i·xx, 1-55S, Taf. 1-35, Abb. 1- 1-6, 1 Karte. 291. Wisley 'and Son, London. ::It$~;R::ItJ:=OO~~==*f6r~'}f/gElt~~. Kidoa: ;: Q)~.I'l.l:j:>r,,'* • ~l!l!; • ~'UM.l: <, r~Q) 4"?Q) fJU!r~~~~tJ:*- ·n'7.>;: c~ ~l1c"t7.> : 9tJ: IJ t;::.t¥1I!l 1....t.:i'&~· jilij~ ~t;::,;67.>~'ItQ)::r 7;fjt~jf§· jilij1l!ljitffiit;::,7U1:."t7.> r IT· m$dlt;::ji[~t;::l!7U"t7.>*tlo JlHIl~Q)tJ: tJ,'"C't'l. Campylosira GRUNOW tJ~J:~Q) ~ t,Q)t'l. Cat>Q) 3,,?Q)~I1~t -:>-n'7.>Q)'"C', m. Kidoa I'l.;: Q).t;::. t -:> C t;rr~'"C';67.>o 1....tJ'1.... Campylosira l'l.i'&JmJ:Q).'i1;~tJ~Jf':J;liJ!Ut;::5J­ ;(P"t 7.> Q)t;::%,t 1.... -C, Kidoa t'l.m$dlQ)jjlij1l!Ut;:::J;IBW~t;::re7U"t 7.> Q)'"C', ;: Q).'i1;'"C'jjIij~I'l.120JIj ~n 7.>0 ;: Q)m.I'l.J:~Q)~~~tJ, i?~ -C, Campylosira Q).t ~ t;::I:j:>'L' /3 t;:::totJ,n7.> RJ~~I'l.tJ: <. !if.li?tJ,t;::3fj;fjt/3t;::, :it(:-:>-C Fragilariaceae t;::.:t<"t7.>;:ct;::.tJ:7.>o ;:nl'l.mtE"i'"C'Q)c ;: ~*~~~'"C', ;R::ItQ)~*'I-I:j:>'"C'I'l.~ < mt;::, ~ < IUIi)t C tJ:-:> -c!±lm"t 7.>0 tJ::to;:Q)~Q)~fij;IH·~'!J :/:fiilll~~~1J (~) iU;r=oo* ~p**=J:(;t;::t,tJ:tro 'J' ;fJ f,!f - Toyotomi ~&, Tenpoku ;R::It Erklarungen zur Tafel 24 (Plate 24) Fig.
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