贵州凯里地区早中寒武世凯里组的Bathynotus

一、前言1982年,中国科学院南京地质古生物研究所新疆地层古生物研究队在准噶尔盆地东南缘吉木萨尔地区考察时,笔者之一(朱祥根)曾在大龙口剖面小龙口组采到一批腹足类化石。1983年和1985年又进行了化石的补充采集和详细的地层工作,采获丰富的腹足类化石,计得2属、3种(包括1新属、2新种),它们是Xinjiangospira rotundata gen. et sp. nov., Xinjiangospira cf. gondwanica (Cox), Bernicia? jimsarensis sp. nov.。     

第六届国际刺丝胞化石(包括古盃与海绵)会议将于1991年9月在联邦德国明斯特市召开

一、前言1982年,中国科学院南京地质古生物研究所新疆地层古生物研究队在准噶尔盆地东南缘吉木萨尔地区考察时,笔者之一(朱祥根)曾在大龙口剖面小龙口组采到一批腹足类化石。1983年和1985年又进行了化石的补充采集和详细的地层工作,采获丰富的腹足类化石,计得2属、3种(包括1新属、2新种),它们是Xinjiangospira rotundata gen. et sp. nov., Xinjiangospira cf. gondwanica (Cox), Bernicia? jimsarensis sp. nov.。     

黔桂皖二叠纪末期硅泥质岩相地层中的介形类

对广西柳桥剖面、贵州晒瓦剖面和安徽平顶山西剖面晚二叠世末期硅泥质岩相地层中产出的介形类化石进行了系统分类学研究,共鉴定介形类化石30属86种,其中包括1个新属Denticupachydomella Yuan gen.nov.和2个新种Pseudobythocypris guiqianensis Yuan sp.nov.和Denticupachydomella spinosa Yuan sp.nov..该动物群主要由薄壳和个体较小的介形类组成,呈现出以古生代分子为主,同时含有少量典型中生代先驱分子(如:Abrobairdia,Lobobairdia)的混合动物群面貌.通过这些剖面之间的对比以及与前人研究资料对比,发现各剖面产出的介形类动物群具有强烈的地方性,三个剖面之间无相同分子,亦仅有20种曾报道于欧洲和东南亚等地区晚石炭世-晚二叠世地层.     

宁夏的䗴

宁夏的含?地层出露较好,剖面和柱状剖面有7处.含?地层自下而上为:下石炭统臭牛沟组、中卫组,上石炭统羊虎沟组,上石炭—下二叠统太原组.?动物群有15属68种及亚种,其中1新种.可建立?化石带 Eostaffella-Mediocris 带 (C₁), Profusulinella 带 (C₂¹) 及 Sphaeroschwagertna 带 (P₁¹),并与甘肃靖远及华北地台其它地区的?化石带对比.     

黑龙江省东部早白垩世的一些海相和半咸水相腹足类

描述黑龙江省东部上云山组和大架山组腹足类化石4属(Mathilida,Uchauxia,Nododelphinula,Trochactaeon)7种,其中2新种：Uchauxia yunshanensis sp．nov．,Nododelphinula dajiashanensis sp．nov．。它们均是特提斯海区早白垩世腹足动物群中常见分子,根据这些腹足类化石的分布和对比,其地层时代应为早白垩世阿普第期一阿尔必期。文内阐述上云山组沉积环境——近高潮附近的泥滩或泥湾,而大架山组沉积环境——低潮线附近浅水。     

江苏句容下二叠统腹足类新种Euomphalus gigantonodus sp.nov.

本文记述一个腹足类新种。Euomphalus gigantonodus sp.nov.,采自江苏句容船山的下二叠统黑色页岩中;产腹足类化石的岩层之上的灰岩产(竹蜓)Misellina claudiae,之下的灰岩产Sphaeroschwagerina。腹足类新种共有三个标本,均稍受挤压。     

广西来宾合山上二叠统腹足类化石

本文记述的材料,是我所二叠一三叠系界线研究队的同志,于1978年春采自广西来宾合山马滩剖面.在龙潭组的灰黑、黑色中层石灰岩,产有腹足类Bellerophon sp. 2, Magnicapitatus angulus Wang, Murchisonia sp., Omphaloptycha angustaperta sp. nov. Guizhouspira alticonica Wang, G. gibbicirelloides sp. nov.和(竹蜓)类Eoverbeekina, Sphaerulina of. cressispira Lee.腹足类的Guizhouspira alticonica Wang, Magnicapitatus angulus Wang 两种,曾见于贵州西部的相同层位,Magnicapitatus属最早发现在欧洲南提罗(Sudtirol)地区的神螺灰岩,笔者认为当前含腹足类化石的层位,可与贵州西部的龙潭组相比,与南提罗地区的神螺灰岩层,亦可对比.在长兴组的灰黑、深灰色中层或中薄层石     

广东南雄盆地上湖组介形类动物群及白垩-第三系界线

南雄盆地上湖组介形类可划分为2个性质不同的动物群及4个化石带:下部为 Porpocypris 动物群,是以中生代属种为主,中、新生代属种混生的过渡性动物群,时代为晚白垩世最晚期;上部为 Cypris 动物群,以 Cypris 属占优势, Sinocypris 属开始出现, Cypridea 等古老属种绝灭为主要特征,时代为早—中古新世.根据介形类演化发展阶段和白垩纪末生物绝灭事件,南雄盆地白垩系与第三系的界线应划在 Porpocypris 与 Cypris 动物群之间,即上湖组坪岭段与下惠段之间.     

青海三叠纪腹足类化石

本文研究的腹足类化石是由青海地质科学研究所于1972、1978、1979三年内在青海玛(王多)县、都兰县采得的;另外青海省地质局第二区测队在治多县采得两块标本,一并在此描述。这些化石经笔者等鉴定共有13属19种,其中有8新种。青海南部三叠纪的腹足类至今尚未正式报道过,本文填补了这一空白。玛(王多)县洪水川群粉砂质板岩中产有Worthenia granatocarinata sp. nov.,与它们共生的头足类有Ussuriidae,其地质时代为早三叠世,所以腹足类化石也为同期产物。玛(王多)县闹仓坚沟组灰黑色砂质灰岩中产有腹足类Euryalox bellisculptoides sp. nov., Vistilia waristricta sp. nov., Pleurotomaria frechi Koken。在长石硬砂岩、灰—灰黑色生物灰岩及钙质粉     

四川、贵州、云南、广西的一些二叠纪腹足动物化石

本文共描述腹足动物化石8属9种,其中8新种,名称如下:Cylicioscapha longlingensis sp. nov., Baylea heterocarinata sp. nov., Callistadia qinglongensis sp. nov., Shwedagonia of. orientalis Yu, Peruvispira lingshuiensis sp. nov., Porcellia lingshuiensis sp. nov., P. magninodosa sp. nov., Discotomaria xingwenensis sp. nov., Anomphalus weixinensis sp. nov.. 上述腹足类化石的标本是1980年2月至1981年1月,笔者写作研究生毕业论文期间在     

A Middle Miocene endemic freshwater mollusc assemblage from an intramontane Alpine lake (Aflenz Basin,Eastern Alps,Austria)

The mollusc fauna of the early Middle Miocene (Langhian) intramontane Alpine Lake Groisenbach is described for the first time. The shells derive from the Feistring Formation in the Aflenz Basin in Austria, which was covered by Lake Groisenbach. The assemblage is moderately diverse with 12 gastropod and 2 bivalve species, suggesting shallow lacustrine and fluvial settings. Among the gastropods, only Theodoxus crenulatus (Klein, 1853) is known from other Miocene localities, whilst all other species are documented so far only from Lake Groisenbach. None of the Early and Middle Miocene lake systems of the Alpine-Carpathian Foredeep and the Balkan Peninsula displays any faunistic resemblance with this new fauna. Even coeval lake faunas from the close-by Graz Basin have no species in common with Lake Groisenbach. This pattern points to a surprising endemicity and biogeographic fragmentation in the Central European freshwater systems during the Early and Middle Miocene. The uniqueness of the newly described fauna is also indicated by the completely erratic occurrence of the otherwise African-Mediterranean genus Bulinus, which is unknown from all other central European Miocene freshwater systems. Emmericia roetzeli Harzhauser and Neubauer nov. sp., Nematurella zuschini Neubauer and Harzhauser nov. sp., Romania fastigata Neubauer and Harzhauser nov. sp., Odontohydrobia groisenbachensis Neubauer and Harzhauser nov. sp., Odontohydrobia pompatica Neubauer and Harzhauser nov. sp., Odontohydrobia styriaca Harzhauser and Neubauer nov. sp., Planorbis austroalpinus Harzhauser and Neubauer nov. sp., Gyraulus sachsenhoferi Harzhauser and Neubauer nov. sp., Bulinus corici Harzhauser and Neubauer nov. sp., Ferrissia crenellata Harzhauser and Neubauer nov. sp. and Stagnicola reinholdkunzi Harzhauser and Neubauer nov. sp. are introduced as new species.     

Late Famennian gastropoda from south-west England

The gastropod fauna of the Upper Devonian Baggy and Pilton formations in south‐west England is revised and includes some 30 taxa. The topmost part of the Upper Famennian succession in Devon is represented by clastic near‐shore and shallow shelf sediments, indicating a short‐term transgressive phase (‘Strunian Transgression’). The sequence yields a highly diverse fauna dominated by brachiopods and ostracodes, locally supplemented by crinoids, bryozoans, trilobites and molluscs. The taxa ‘Patellostium’britannicum sp. nov., Angyomphalus (Angyomphalus) junius sp. nov. and Dictyotomaria eurocapillaria sp. nov. are erected; a junior homonym is replaced by Macrochilina? piltonensis nom. nov. The gastropod fauna displays an independent character, where latest Devonian faunal elements overlap with Late Palaeozoic taxa expressing a transition similar to that of the bivalves, brachiopods, echinoderms and corals, without a sharp faunal break at the Devonian/Carboniferous boundary. Apart from the Caenogastropoda, all subclasses of gastropods are represented. Members of the bellerophontoids, pleurotomarioids and loxonematoids are most abundant, followed by murchisonioids, naticimorphs, euomphalomorphs and platyceratoids. The various gastropod groups represent different ecological demands and trophic categories, and together with the accompanying fauna indicate that nearly all habitats and niches were occupied in the shallow South Laurussian Shelf.     

Late Triassic (Late Norian) gastropods from the Wallowa Terrane (Idaho,USA)

A diverse Late Triassic (Late Norian) gastropod fauna is described from the Mission Creek Limestone of the Wallowa terrane (Idaho, USA). Sample standardization by rarefaction analysis indicates that the fauna is even more diverse than the Late Triassic gastropod fauna from the Pucara Formation (Peru) which represents the most diverse gastropod fauna from South America. The gastropod fauna consists of 66 species; several genera are reported for the first time from North America. A high percentage of the species are highly ornamented and several have distinct siphonal canals. This suggests that the appearance of truly Mesozoic elements among the gastropods began before the Mesozoic Marine Revolution in other clades. The fauna is dominated by high-spired strongly ornamented procerithiids, a group more characteristic for the Jurassic. Comparison of the present fauna and the Iranian Nayband Formation gastropod fauna show that the procerithiids underwent a first global radiation in the Late Triassic. The high number of new species in this fauna suggests that sampling of Late Triassic gastropod faunas is still incomplete and hinders palaeobiogeographic considerations. Previous suggesions that gastropod faunas from the Wallowa and Wrangellia terranes resemble each other and are distinct from those of Alexander, Chulitna, and Farewell terranes are basically corroborated. The gastropod fauna of the Mission Creek Limestone differs considerably from that of the western and central Tethys but shares several taxa with the Late Triassic gastropod fauna of the Pucara Formation in Peru. Thus, the Hispanic corridor was probably not present in the Norian but opened only in the Early Jurassic. The subfamily Andangulariinae is introduced and placed in the Zygopleuridae. The generaSpiniomphalus, Nodoconus, Gudrunella, Blodgettella, Idahospira, andSiphonilda and the subgenusCryptaulax (Wallowax) are introduced. 27 species are erected. A lectotype is designated forCryptaulax rhabdocolpoides Haas, 1953.      

Sarmatian (Late Middle Miocene) gastropod assemblages of the Central Paratethys

Summary A rather diverse gastropod fauna from Sarmatian deposits of the Austrian/Hungarian Eisenstadt-Sopron Basin was studied. The fauna derives from two layers of clay and silt within a siliciclastic section at St. Margarethen in Burgenland (Austria). These layers are interpreted as littoral mudflats which formed during the Sarmatian (Late Middle Miocene) along the western coast of the Central Paratethys. Strong shifts in the composition of the gastropod fauna, dominated by Potamididae (Cenogastropoda: Cerithioidea), within each layer indicate successions of limnic-fluvial to oligohaline, brackish-littoral, and marine-littoral environments. These shifts in facies are reflected by an alternational of thePotamides hartbergensis assemblage,Granulolabium bicinctum assemblage, and thePotamides disjunctus assemblage. The speciesJujubinus turriculus (Eichwald, 1850),Gibbula buchi (Dubois, 1831), andCylichnina elongata (Eichwald, 1830) are reported for the first time from the Sarmatian of the Paratethys.Mitrella agenta nov. sp. (Neogastropoda: Columbellidae) is introduced as a new species. These species might represent relics of the diverse Badenian fauna but could also prove a minor ingression of marine species from an adjacent bioprovince in the Late SarmatianMactra “Zone”.     

豫淮盆地太原组顶部斯威特刺(Sweetognathus)种的分类修正及其地层意义

作者通过对豫淮盆地太原组顶部灰岩中牙形刺的研究,发现Sweetognathus动物群较为丰富,计4属10种,含一个新种:Sweetognathuspraeiranicussp.nov.。其中以Sweetognathus最为繁盛,并对其种的分类进行了修正,将原定的Sweetognathusinornatus的大部分标本归入Sweetognathusmerrilli。根据新的分类,建立了两个组合带,即Sweetognathusmerrilli带和Sweetognathuswhitei-Xuzhougnathusmonoridgosus带。通过与国内外相当牙形刺组合带(带)的对比,初步认为该动物群属中、晚萨克马尔到早亚丁斯克期。     

Patellogastropoda and Vetigastropoda (Mollusca,Gastropoda) from the marine Jurassic of Patagonia,Argentina

Gastropod faunas from the Early Jurassic (Late Pliensbachian–Early Toarcian) marine deposits of Chubut Province, Argentina, are described from Lomas Occidentales, Cerro La Trampa and Puesto Currumil localities, representing eight species, three of them new. These are Scurriopsis? sp., Chartronella gradata sp. nov., Calliotropis? sp., Pleurotomaria sp., Leptomaria sp., Hamusina? wahnishae sp. nov., Colpomphalus musacchioi sp. nov. and Jurassiphorus? cf. triadicus Haas. The gastropod assemblage reported here testifies paleobiogeographical connections with other coeval gastropod associations from the western Tethys. However, Chartronella, Hamusina and Jurassiphorus may represent survivors of Triassic associations, considering the ancient seaway from Peru as the most plausible hypothesis for biotic exchange of these faunas during the Late Triassic–Early Jurassic boundary. An abundant and diverse invertebrate fauna such as corals, echinoderms, cephalopods, brachiopods, bivalves and other gastropods found in association with the gastropods described here characterises a shallow marine environment for the gastropod-bearing rocks.http://www.zoobank.org/urn:lsid:zoobank.org:pub:7B8EAFC0-3AC0-4F91-97A5-22AAC6A19909     

Early Miocene (Ottnangian) Mollusca of the Western Paratethys—ontogenetic strategies and palaeo-environments

Early ontogenetic shells of 25 species of brackish water and freshwater molluscs from the Ottnangian (Lower Miocene) Oncophora Beds (Lower Bavaria, South Germany) and Kirchberg Formation (Upper Bavaria, South Germany) are described for the first time. Taxonomic implications are discussed. The investigated bivalves (Cardiidae and Dreissenidae) were characterised by an indirect development with inclusion of a planktonic veliger stage. Among the gastropods only three species of the genus CtyrokiaSchlickum, 1965 were characterised by veliger larvae, all the other gastropod species were direct developers, which hatched as crawling young. The species Agapilia schlickumi nov. sp. (Neritidae), Nematurella pseudozilchi nov. sp. and Nematurella strauchi nov. sp. (Hydrobiidae) are introduced. Our study revealed the co-occurrence of 10 molluscan species in the Oncophora Basin of Lower Bavaria and the Kirchberg Basin of Upper Bavaria and thus indicates similar oligohaline to mesohaline coastal swamp milieus for both depositional environments. The presence of planktonic larval development in gastropods indicates a connection to the open sea.     

PERMIAN OSTRACODS FROM THE LERCARA FORMATION (MIDDLE TRIASSIC–CARNIAN?), SICILY,ITALY

Abstract: A rich, diverse Permian ostracod fauna has been recovered from the red and grey, laminated shales and quartz‐rich shales of the Triassic Lercara Formation. Forty‐seven species have been identified, 13 of which are newly described here; they belong to 26 genera of which three are new: Anahuacia lercaraensis sp. nov., Aurigerites siciliaensis sp. nov., Bairdia portellaensis sp. nov., Cristanaria? katyae sp. nov., Fabalicypris gruendeli sp. nov., Lethiersa salomonensis gen. et sp. nov., Lethiersia sinusoventralis gen. et sp. nov., Portella trapezoida gen. et sp. nov., Siciliella elongata gen. et sp. nov., Siciliella infernespinosa gen. et sp. nov., Siciliella prima gen. et sp. nov., Siciliella quadrata gen. et sp. nov., and Siciliella spinorobusta gen. et sp. nov. The assemblages contain or are composed of palaeopsychrospheric forms, which are regarded as index fossils for deep environments. The bathymetry of the different associations in life is evaluated.     

Ostracodes from the Upper Permian Khivach formation in Kolyma-Omolon Basin

Ostracodes Healdianella splendida Belousova, Paraparchites ganelini sp. nov., Paraparchites? hivachensis sp. nov. and Arcibairdia vodopadniensis sp. nov. are described from the Upper Permian deposits of the Khivach Formation (Kolyma-Omolon Basin, Eastern Siberia). Paraparchites species most closely resemble ancient Paleozoic ostracodes of the Boreal province. Valve morphology of Healdianella and Acribairdia points to their similarity to ostracodes from the upper levels of the Upper Permian of the Tethyan realm.     

Late paleozoic and Late Triassic limestones from north Palawan Block (Philippines): Microfacies and paleogeographical implications

Summary Selected Late Paleozoic and Triassic limestone exposures were studied on northern Palawan Island, Philippines, with regard to microfacies, stratigraphy and facies interpretation. Although some of the outcrops were already reported in literature, we present the first detailed microfacies study. Late Paleozoic carbonates in the El Nido area are represented by widley distributed Permian and locally very restricted Carbonifenous limestones. Of particular interest is the first report of Carboniferous limestones in the Philippines dated by fossils. Fusulinids indicate a ‘Middle’ Carboniferous (Moscovian-Kasimovian) age of the Paglugaban Formation only known from Paglugaban Island. The Permian Minilog Formation consists mostly of fusulinid wackestones and dasycladacean wacke-/packstones. Fusulinid datings (neoschwagerinids and verbeekinids) provide a Guadalupian (Wordian-Capitanian) age. The depositional setting of the Middle Permian carbonates corresponds to a distally steepened ramp with biostromes built by alatoconchid bivalves locally associated with richthofeniid brachiopods. Late Triassic limestones occur in isolated exposures on and around Busuanga Island (Calamian Islands). The age of the investigated carbonates is Rhaetian based on the occurrence ofTriasina hantkent Maizon. Microfacies data indicate the existence of reefs (Malajon Island) and carbonate platforms (Kalampisanan Islands, Busuanga Island, Coron Island). Reef boundstones are characterized by abundant solenoporacean red algae, coralline sponges and corals. Platform carbonates yield a broad spectrum of microfacies types, predominantly wacke- and packstones with abundant involutinid foraminifera and some calcareous algae. These facies types correspond to platform carbonates known from other parts of Southeast Asia (Eastern Sulawesi and Banda Basin; Malay Peninsula and Malay Basin). The Philippine platform carbonates were deposited on and around seamounts surrounded by deeper water radiolarian cherts. The new data on facies and age of the Philippine Permian and Triassic carbonates contradict a close paleogeographical connection between the North Palawan Block and South China and arise problems for the currently proposed origin of the North Palawan Block at the paleomargin of South China. We hypothesize that North Palawan was part of the Indochina Block during the Carboniferous and Permian, separated from the Indochina Block during the Middle Permian and collided with the South China Block in the Late Cretaceous.