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Chlorogloeaopsis contexta, Obruchevella
parvissima, Sphaerophycus parvum,
Myxococcoides minor, Leiosphaeridia crassa,
Trachyhystrichosphaera
vidalii,
Trachyhystrichosphaera sp., Micrhystridium
pallidum, Cymatiosphaera minuta and sponge
spicules of monaxons and hexactinellid
affinity. The assemblage suggests a
Neoproterozoic age for Gangolihat Dolomite.
2009020097
湖 北 宜 昌 张 村 坪 地 区 埃 迪 卡 拉 陡 山 沱 组 微
体 化 石 的 新 材 料 及 其 锆 石 SHRIMP U-Pb
年 龄 = New material of microfossils from the
Ediacaran Doushantuo Formation in the
Zhangcunping area, Yichang, Hubei Province
and its zircon SHRIMP U-Pb age. ( 英 文 ). Liu
Pengju; Yin Chongyu; Gao Linzhi; Tang Feng;
Chen Shouming. Chinese Science
Bulletin, 2009, 54(6): 1058-1064
The Zhangcunping area is located at the
north limb of the Huangling anticline in
Yichang, Hubei Province. Here, the
sedimentary succession of the Ediacaran
Doushantuo Formation is similar with that in
the Weng ’ an area, Guizhou Province. A
large number of new microfossils (mainly
acanthoacritarchs) from the Doushantuo
Formation in this area are reported in this
paper. The fossil assemblage shows similarity
as the phosphatized biota of the Doushantuo
Formation at Weng’an, Guizhou Province
and the silicified biota of the Doushantuo
Formation at the Yangtze Gorges, which
suggests that the Zhangcunping area is a key
for correlation of the Doushantuo Formation
between the Weng ’ an area, Guizhou
Province and the Yangtze Gorges. Besides, a
new zircon SHRIMP U-Pb age (614.0±7.6
Ma) is first obtained from a horizon
underneath the exposed surface in the middle
of the Doushantuo Formation in the
Zhangcunping area. This age not only
provides a new datum for subdivision of the
Ediacaran Doushantuo Formation, but also
indicates that the age of the exposed surface in
the middle of the Doushantuo Formation in
the Yangtze Platform should be posterior to
614.0±7.6 Ma. Due to the horizon of the
Weng’an biota situated above the exposed
surface, the age of the Weng’an biota should
be posterior to 614.0±7.6 Ma as well.
牙 形 石
2009020098
法 国 Montagne Noire 地 区 早 奥 陶 世 的 牙 形
类 属 Teridontus (Miller, 1980) = The
conodont genus Teridontus (Miller, 1980)
from the Early Ordovician of Montagne Noire,
France. ( 英 文 ). Serpagli E; Ferretti A; Nicoll
R S; Serventi P. Journal of
Paleontology, 2008, 82(3): 612-620 5 图 版 .
The conodont genus Teridontus was
introduced in 1980 by Miller and was based
on the Late Cambrian species Oneotodus
nakamurai Nogami, 1967 from the Yencho
Member of the Fengshan Fm. of northeast
China. Teridontus was later reported from
either the Upper Cambrian or Lower
Ordovician (Landing et al., 1980; Miller, 1980;
Landing and Barnes, 1981; Landing, 1983; An
et al., 1983, 1985; Ni et al., 1983; Peng et al.,
1983; Nowlan, 1985; Landing et al., 1986;
Bagnoli et al., 1987; An, 1987; Buggisch and
Repetski, 1987; Pohler and Orchard, 1990; An
and Zheng, 1990; Seo and Ethington, 1993;
Wang, 1993; Lehnert, 1994; Nicoll, 1994; Seo
et al., 1994; Ji and Barnes, 1994; Taylor et al.,
1996; Lehnert et al., 1997; Jia, 2000; Dubinina,
2000; Pyle and Barnes, 2002; Zeballo et al.,
2005) sediments in numerous localities around
the world, but a unanimous interpretation of
the composition of the Teridontus apparatus
organization was far from accepted.
In 2000 we were invited by J. J. Álvaro, E. P.
Villas and D. Vizcaïno to join a working
group on the stratigraphy of the Early
Paleozoic of southern Montagne Noire
(France). Our specific objective was the study
of conodont faunas emerging from limestone
intercalations in the Ordovician successions.
Several samples from the Val d'Homs
Formation collected in Sall è les-Caberd è s,
from Munio Formation, collected in Combes
de Barroubio (St. Jean de Minervois) and,
chiefly, from the St. Chinian Formation
collected in La Regagnade Valley (St. Martial),
produced an amazingly rich conodont fauna
attributed to the P. deltifer Zone and, more
precisely, to the lower part of the P. deltifer
deltifer Subzone (Álvaro et al., 2005; Serpagli
et . . .
2009020099
马 来 西 亚 半 岛 西 北 Langkawi 岛 中 晚 奥 陶
世 牙 形 类 的 生 物 地 层 学 和 古 生 物 地 理 学 =
Biostratigraphy and Paleobiogeography of
Middle and Late Ordovician Conodonts from
the Langkawi Islands, Northwestern
Peninsular Malaysia. ( 英 文 ). Agematsu S;
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