The sediments of 10 sites(E 122°~123°30′,N 29°~32°) about 15cm in length were collected from Changjiang River Estuary during April, 2004 to investigate the horizontal and vertical distribution of dinoflagellate cysts in this area.
We analyzed 50 sediment samples from the Minjiang Estuary, Fujian Province, and identified 17 species of 7 genera of dinoflagellate cysts. Scrippsiella trochoidea is the most dominant species, and Polykrikos kofoidii/schwartzii, Gonyaulax spinifera, G.
It was considered that dinoflagellates may be present in the Precambrian, and perhaps some Acritarches are the ancestors of modern dinoflagellates on the basis of morphological, ultrastructural, and biochemical information, but undisputed fossil dinoflagellate cysts was not recorded in rocks older than Late Triassic.
Surface sediment samples at 38 sites of the South China Sea were collected and analyzed to study the contents and assemblage distributions of dinoflagellate cysts.
The 61 samples studied in the thesis were collected from the Well PY34-1-1frominterval 3546-3894m and the Well LH19-5-1 from the interval 2475-2718m. Bothqualitative and quantitative approaches were used for above purpose. Nearly allsamples contain moderate to few and well-preserved dinoflagellate cysts.
The brown-colored layer is composed mainly of dinoflagellate cysts.
This paper documents the discovery of peridinioid organic walled dinoflagellate cysts in Holocene sediments of the freshwater, low-alkalinity, high mountain Lake Nero di Cornisello (Adamello mountain range, Trentino, Italy).
Peridinioid dinoflagellate cysts in a Holocene high-mountain lake deposit in Italy
Using these methods, dinoflagellate cysts can be produced in amounts large enough for shellfish grazing experiments or whenever large amounts of cysts are needed.
Methods for the production of dinoflagellate cysts in two types of 1 L containers have been developed.
The dinoflagellates and acritarchs dealt with in the present paper were obtainedfrom the bore-hole samples of the Lower Tertiary Naudou Formation in the BoseBasin of Guangxi.A total of 11 genera and 25 species are described and illustrated,including 1 new genus,4 new species,1 new variety and 2 new combinations as listedbelow: Bosea granulata gen.et sp.nov.,B.granorugosa sp.nov.,Saeptodinium tian-dongensis sp.nov.,Granodiscus caperatus sp.nov.,Pediastrum simlex Meyen var.deltoidea var.now.,Bosea (al.Palaeostomocystis)...
The dinoflagellates and acritarchs dealt with in the present paper were obtainedfrom the bore-hole samples of the Lower Tertiary Naudou Formation in the BoseBasin of Guangxi.A total of 11 genera and 25 species are described and illustrated,including 1 new genus,4 new species,1 new variety and 2 new combinations as listedbelow: Bosea granulata gen.et sp.nov.,B.granorugosa sp.nov.,Saeptodinium tian-dongensis sp.nov.,Granodiscus caperatus sp.nov.,Pediastrum simlex Meyen var.deltoidea var.now.,Bosea (al.Palaeostomocystis) laevigata (Jiabo,1978) n.comb.andB.(al.Rugosphaera) operculata (Jiabo,1978) n.comb.The algal fossils of the Nau-dou Formation may be divided into 4 cbaracteristic assemblages in ascending order:1) Bosea-Leiosphaeridia-Granodiscus assemblage,2) Rugosphaera-Granodiscus asse-mblage,3) Granodiscus-Leiosphaeridia-Bosea assemblage,and 4) Pediastrum-Leio-sphaeridia-Granodiscus assemblage.The Naudou Formation may be assigned to LateEocene—Oligocene,mainly Oligocene in age,and its sedimentary environment repre-sents probably the freshwater lacustrine facies.The diagnosis of the new genus Bosea is briefly given below:Tract presumably belonging to dinoflagellate cysts,circular to ovoidal in outline,without apical and antapical horns,with a large “pylome”,which is often situatedat the largest width of tract and represents probably the epitractal archaeopyle.Oper-culum attached or lost.Cingulum,sulcus and reflected tabulation absent.Hypotractlarger than epitract.Surface smooth or granular,rugose,usually lacking in spine-likeprocesses.
The dinoflagellate cysts have been observed in the Yuyang formation of the Upper Cretaceous,the Qianjiang and the Xin—gouzui formations of the Lower Tertiary for the first time.The dinoflagellate assemblage in the Yuyang for- marion is comparable to that in the Upper Cretaceous Dalangshan formation, Sanshui basin,Guangdong province in general.The two dino-assemblages are probably contemporary products developed under similar paleoenvironments. Combined with other paleontological and sedimentological...
The dinoflagellate cysts have been observed in the Yuyang formation of the Upper Cretaceous,the Qianjiang and the Xin—gouzui formations of the Lower Tertiary for the first time.The dinoflagellate assemblage in the Yuyang for- marion is comparable to that in the Upper Cretaceous Dalangshan formation, Sanshui basin,Guangdong province in general.The two dino-assemblages are probably contemporary products developed under similar paleoenvironments. Combined with other paleontological and sedimentological information,the dinoflagellate assemblages indicate that the sediments containing them may deposit in a brackish water body mainly controlled by both sea-flood and eva- poration under arid climate conditions.Different from marine assemblages in both general and detail,the nonmarine ones have been discussed in this paper.
This paper deals with Pleistocene dinoflagellate cysts from arenaceous dolomite in Hainan Island,China. Four genera and 10 species of dinoflagellates (including 1 new species)were described and illus-trated. The palaeoenvironment(warm temperate neritic) was also discussed on the basis of the environ-mental and ecologic distributions of dinoflagellate fossils.
dinoflagellate cysts
甲藻孢囊
查询“dinoflagellate cysts”译词为用户自定义的双语例句
相关查询
2008 CNKI－中国知网