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东 攀 剖 面 二 叠 纪 末 期 牙 形 石 动 物 群 : 浅 水 相
与 深 水 相 的 对 比 = End-Permian conodont
fauna from Dongpan section: Correlation
between the deep-and shallow-water facies.
( 英 文 ). Luo Genming; Lai Xulong; Feng
Qinglai; Jiang Haishui; Wignall P; Zhang
Kexin; Sun Yadong; Wu Jun. Science in
China Series D: Earth Sciences, 2008, 51(11):
1611-1622
This paper systematically investigated the
conodonts from the uppermost Permian to the
Lower Triassic at the Dongpan Section,
Southern Guangxi, South China, and obtained
abundant Late Permian conodonts from the
syndepositional limestone lenses of beds 3 and
5-2 at this section. One genus and eight
species of conodont P1 element including one
new species, Neogondolella dongpanensis sp.
nov., have been identified. The feature of
conodont fauna indicates that conodonts
collected from beds 3 and 5 at the Dongpan
Section belong to the Neogondolella yini
conodont zone, and correspond to bed 24 at
the Meishan Section. Based on these conodont
data, we suggest that the Neoalbaillella
optima radiolarian zone at the Dongpan
Section at least extended to the upper part of
the N. yini conodont zone.
2009020108
澳 大 利 亚 东 部 维 宪 系 的 牙 形 类 生 物 地 层 =
Conodont biostratigraphy of the Visean Series
in eastern Australia. ( 英 文 ). Jenkins T B H;
Crane D T; Mory A J. Alcheringa, 1993, 17(3):
211 - 283
Conodonts from Visean limestones of the
Yarrol and Tamworth Belts of Queensland
and New South Wales are, in general, sparsely
preserved but widespread and about equally
divided between endemic and cosmopolitan
species. Patrognathus conjunctus sp. nov. is
the commonest conodont in the early Visean
and gave rise to Montognathus semicarinatus
gen. et sp. nov. and to M. carinatus gen. et sp.
nov., the trio being name-bearers for three
zones based on endemic elements. The fourth
and highest Visean zone has the mondial
Gnathodus texanus and Gnathodus bilineatus
as joint nominate species, the latter being
included in the zonal name to emphasise the
restricted definition we adopt for G. texanus.
Adetognathus also probably evolved from
Patrognathus to give a lineage of three new
endemic species: — A. taphrognathoides, A.
cannindahensis and A. subunicornis, all
predating the earliest adetognathids of the
northern continents. Cavusgnathus altifrons sp.
nov. is intermediate in platform morphology
and time-range between late Tournaisian
Clydagnathus and late Mississippian species
of Cavusgnathus; Synprioniodina thompsoni
sp. nov., likewise seems to be intermediate
between S. pulchra and Hindeodus cristula.
Other new taxa are: Mestognathus convexus,
Vogelgnathus angustus, Gnathodus rugulatus
and G. girtyi maxwelli. Described and
illustrated but left in open nomenclature are
Adetognathus sp. A, Cudotaxis sp. A,
Gnathodus sp. A, and Rhachistognathus sp. J.
Conodont zones and brachiopod zones give
generally accordant divisions, apparent
discrepancies being attributable to zonal
boundaries locally lacking sufficient data
control or being influenced by major facies
changes. Approximate limits are indicated in
the sequences of eastern Australia for the
Lower (VI), Middle (V2) and Upper (V3)
divisions of the Visean, account being taken
of ages suggested in the recent literature on
ammonoids, algae and foraminifera. No
evidence is found for any major hiatus in the
Visean although regional disconformities
mark its base in the Hunter Valley, N.S.W.
and its top in parts of the Yarrol-Rockhampton
area
2009020109
密 西 根 盆 地 西 北 部 下 志 留 统 ( 阿 伦 尼 克
阶 ) 大 化 石 和 牙 形 类 生 物 相 = Lower
Silurian (Aeronian) megafaunal and conodont
biofacies of the northwestern Michigan Basin.
( 英 文 ). Watkins R; Kuglitsch J J. Canadian
Journal of Earth Sciences, 1997, 34(6): 753–
764
Lower Silurian (Llandovery: Aeronian)
carbonates of the Burnt Bluff Group,
northwestern Michigan Basin, represent a
transect along a southward-dipping ramp that
extends from tidal-flat to basin environments.
Benthic megafaunas include an ostracod
biofacies (tidal flat), stromatoporoid – coral
biofacies (very shallow subtidal), pentamerid,
crinozoan, and crinozoan – stromatoporoid
biofacies (deeper subtidal), and a crinozoan–
sponge biofacies (distal ramp and basin). The
crinozoan–sponge biofacies, which includes
diverse, small crinozoan ossicles, 19 types of
siliceous sponge spicules, and at least 65 other
taxa, has a biota that is similar to those of
Silurian continental margins. Megafaunal
biofacies indicate an Early Silurian gradient
going from a shoreline in the north to water
depths of perhaps 60 m in the south. The
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