Untitled

deposition of organic-rich, low-oxygen facies
in shelf to basinal environments (Exshaw
Formation and correlative units). The
overlying Banff Formation consists of
anaerobic to marginally aerobic, starved-basin
to deep-ramp lithofacies succeeded by
shallower water carbonates; this sequence
records basinward (westward) progradation of
the Banff ramp in middle to late Tournaisian
time. Distinct conodont biofacies
representative of shallow-ramp to deep-basin
settings that were previously recognized in the
southernmost Canadian Rocky Mountains and
Montana have also been identified to the north
between the North Saskatchewan and
Athabasca valleys. Upper Palliser carbonates
contain low-diversity conodont faunas of
indigenous to transported palmatolepid-,
polygnathid-, and apatognathid-dominated
assemblages. Exshaw deposits contain
indigenous and reworked palmatolepid- and
bispathodid-dominated assemblages and
reworked or transported polygnathids. Lower
Banff biofacies include transported and
indigenous assemblages of siphonodellids,
polygnathids, and pseudopolygnathids
representative of the deep-middle Banff ramp.
Polygnathid-hindeodid biofacies of shallower
middle-ramp environments occur higher in the
Banff Formation in the North Saskatchewan
and Athabasca valleys.
2009020102
日 本 Oritate 的 Neostrachanognathus
Tahoensis 及 阿 曼 Neostrachanognathus 种
器 官 的 重 建 = Reconstruction of an apparatus
of Neostrachanognathus Tahoensis from
Oritate, Japan and species of
Neostrachanognathus from Oman. ( 英 文 ).
Agematsu S; Orchard M J; Sashida K.
Palaeontology, 2008, 51(5): 1201-1211
The apparatus of an Early Triassic conodont
Neostrachanognathus tahoensis Koike, 1998
from Oritate, Kumamoto Prefecture, Japan,
and a species of Neostrachanognathus from
Oman were reconstructed. On the basis of five
natural assemblages from the Oritate area, the
three-dimensional apparatus model of N.
tahoensis is interpreted as bilaterally
symmetrical and composed of 14 elements
consisting of pairs of P 1 , P 2 , P 3 , S 1 , S 2 , S 3 , and
S 4 elements. The P 1 and P 2 elements are
coniform elements, the P 3 elements are
digyrate forms, and the S elements are
bipennate ramiforms. The S elements are
arranged rostrally in the apparatus and the
pairs of the P 1 , P 2 , and P 3 elements are
subvertically arranged caudally and ventrally
to the S array. One of the natural assemblages
was formed by rostrocaudal collapse of the
apparatus on the sea floor, whereas the other
assemblages indicate that conodont animals
came to rest nearly parallel with the substrate
prior to burial. A collection of isolated
elements from Jabal Safra, Oman, includes a
second species of Neostrachanognathus with a
comparable apparatus.
2009020103
泰 国 半 岛 南 部 Tarutao 岛 早 奥 陶 世 牙 形 刺
= Early Ordovician conodonts from Tarutao
Island, Southern Peninsular Thailand. ( 英 文 ).
Agematsu S; Sashida K; Salyapongse S;
Sardsud A. Palaeontology, 2008, 51(6): 1435-
1453
Early Ordovician conodont faunas of the
Thung Song Formation on Tarutao Island,
southern peninsular Thailand, consist of 14
known species belonging to 17 genera, and
eight undescribed species. Utahconus
tarutaoensis and Filodontus tenuis are new
species. Three conodont zones: the Rossodus
manitouensis Zone, the Utahconus
tarutaoensis Zone and the Filodontus tenuis
Zone, in ascending order, are defined in the
study sections. These are coeval with the
interval from the Rossodus manitouensis Zone
to the Acodus deltatus-Oneotodus costatus
Zone of the standard zonation in the North
American Midcontinent. Based on the
conodonts studied here and fossils previously
reported from Tarutao Island, the Thung Song
Formation is early Tremadocian to middle
Arenig (Ibexian) in age. This formation is
lithostratigraphically subdivided into the S1 to
S5 members, and our study sections consist of
the S1 to S3 members. These strata
accumulated on a shelf in the Early
Ordovician. The depositional environments of
the limestones making up the S1 and S3
members were in deeper-shelf conditions.
Limestone and shale of the S2 member formed
in a shallow-water, high-energy environment.
2009020104
安 徽 石 台 奥 陶 纪 弗 洛 期 - 大 坪 期 牙 形 刺 多 样
性 的 演 变 = Conodont Diversification In The
Zitai Formation ( Floian-Dapingian, Late
Early-Early Mid Ordovician ) Of Shitai,
Anhui Province, East China. ( 中 文 ). 吴 荣 昌 ;
詹 仁 斌 ; 李 贵 鹏 . 古 生 物 学 报 , 2008, 47(4):
444-453
34