79. MATERIALS FOR THE KNOWLEDGE OF THE CENOZOIC NON-MARINE MOLLUSCA OF NORTH CHINA (Part 1)
スポンサーリンク
概要
- 論文の詳細を見る
The fossil gastropods dealt with in the present paper were collected by Dr. Tetsugoro WAKINIIZU from the loess at Tsingsing and Shihkiachwang (the socalled "red eposited loess"?), both in Hopei Province.<BR>The material from Tsingsing comprises only three species as follows:<BR><I>Brailybacna</I> (<I>Manchurohclix</I>) <I>lavrushini</I> (COCKERELL)(2 specimens)<BR><I>Cathaica fasciola</I> (DRAPARNAITD)(4 specimens)<BR><I>Cathaica putvcratrix</I> (von, MARTENS)(2 specimens)<BR><I>Bradybacna lavrushini</I> still lives in this district and the two species of Cathaica are most common snails in North China, both fossil and living. The state of preservation of the fossils is very excellent.<BR>The collection from Shihkiachwang contains three species of fresh-water gastropods and two of land snails, as listed below:<BR><I>Lymnaca (Galba) pervia</I> von MARTENS (about 10 specimens)<BR><I>Lymnaca</I> (<I>Radix</I>) <I>plicatula</I> BENSON (3 specimens)<BR><I>Anisus</I> (<I>Gyraulvs</I>) sp.(1 specimen)<BR><I>Opeas pyruala</I> SCHMACKER and BOETTGER (7 specimens)<BR><I>Metodontia yavtaiclisis</I> (CROSSE and DEBEAUX)(6 specimens)<BR>All the species are now widely distributing throughout North China. Most of the specimons before hand are not well preseived.<BR>The detailed synonymy, the dimensions, the recent distribution and the fossil occurrence of each species are shown in the foregoing pages. Further, a tentative correlation table of the Cenozoic formations in North China and Manchuria is given on page 92, detailed discussion of which, however, will be reserved for another occasion.<BR>The results of the taxonomic studies are summarised as follows: <BR>1) <I>Limnaea</I> (<I>Gulnaria</I>) <I>shantungensis</I> JONES and PRESTON (1904), <I>Limnaea kingi</I> PING and YEN (1933), <I>Limnaea truncatula tenua</I> PING and YEN (1933) and <I>Galba laticallosiformis</I> YEN (1937) are all synonyms of <I>Lymnaea</I> (<I>Galba</I>) <I>pervia</I> von MARTENS. The specimens of <I>Lymnaea</I> from South Ordos being referred to <I>Galba truncatula</I> (MÜLLER) by YEN (1937) are also identifiable with<I> pervia</I>, while <I>Limnaea exigua</I> PING and YEN (1933) described from Aksu evidently belongs to <I>Lymnaea</I> (<I>Galba</I>) <I>truncatula</I> (MÜLLER).<BR>2) <I>Limnaeus chefouensis</I> CLESSIN (1886), <I>Limnaeus möllendoKtflanus</I> CLESSIN (1886), <I>Limnaea mars</I> JONES and PRESTON (1904) and <I>Limnaea whartoni</I> JONES and PRESTON (1904) may be synonymous with <I>Lymnaea</I> (<I>Radix</I>) <I>plicatula</I> BENSON.<BR>Further, the specimens from Tai-hu being assigned to <I>Limnaea clessini</I> NEUMAYER by ANNANDALE (1918) undoubtedly belong to <I>plicatula</I>, and the shells referred to <I>clessini</I> by YEN in -his recent paper (1937) on gastropods of. North China seem more closely related to <I>plicatula</I> than to NEUMAYER'S species.<BR>In the Ryûkyû Islands, there is inhabiting a form of <I>Lymnaea</I> which can hardly be distinguished from <I>plicatula</I>. Many Japanese authors have referred it to <I>Limnaea minor</I> BENSON, but this identification does not seem reliable. In his description of <I>minor</I>, BENSON has given neither its illustration nor dimensions and has stated that it strongly resembles <I>Lymnaca</I> (<I>Galba</I>) <I>truncatula</I> (MÜLLER). This species has never been reported from the Asiatic Continent, since it was first described from the Chusan Islands.<BR>3) <I>Opeas fragilis</I> PING (1929), a fossil species from the Choukoutien formation, is nothing but a synonym of <I>Opeas pyrotla</I> SCIIMACKER and BOETTGER.<BR>4) A detailed description of <I>Bradybaena lavrushini</I> (COCKEREL') is given by Isao TAKI in a paper entitled "Mollusca of Jehol"(Report of the First Scientific Expedition to Manchoukuo, section 5, division 1, part 1, article 4) which will be published in the near future.
- 日本古生物学会の論文
日本古生物学会 | 論文
- 多変量解析を用いた化石ウチムラサキガイ (マルスダレガイ科) の殻形態の解析とその古生物学的意義
- 鮮新統池子層のシロウリガイ類群集の種組成, 産状とタフォノミー
- 南部フォッサマグナ地域の新第三紀貝化石群
- 本州沖黒潮流軸部に生息する現生浮遊性有孔虫の深度分布とその季節変化
- 新生代の哺乳類進化と絶滅事変