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Late Pleistocene-Holocene and Recent
Ostracoda of the Laptev Sea and their
importance for paleoenvironmental reconstructions.
( 英 文 ). Stepanova A Yu.
Paleontological Journal, 2006,
40(Supplement 2): S91-S204 25 图 版 .
This work is the first detailed description
of the Late Pleistocene-Holocene
and Recent Ostracoda of the Laptev Sea.
A total of 45 species in 22 genera and 13
families have been identified. All these
species are described monographically.
Three different ecological assemblages
of ostracodes corresponding to different
combinations of environmental parameters
have been established; they are restricted
to three regions of the sea: western-central,
eastern, and southern. The
recent ostracode assemblages of the
Laptev Sea have been compared with
those from other Arctic areas and are
most similar to those of the Beaufort and
Kara seas. Data on recent Ostracoda are
used for paleoenvironmental reconstructions
on the eastern shelf and western
continental slope of the Laptev Sea. For
this purpose, ostracodes from five sections
obtained from these parts of the sea
have been examined. The oldest sediments,
which are of Late Pleistocene age
(15.8 cal. ka BP), have been recovered
in a core from the western continental
slope. These yielded five ostracode assemblages,
which correspond to different
paleoenvironments and replaced
each other in the course of the rapid
postglacial sea-level rise, thus showing
variations in the Atlantic water inflow
from the west and freshwater discharge
from the subaerially exposed shelf. On
the outer shelf of the eastern part of the
sea, the rapid sea-level rise in the Early
Holocene (lowermost dating 11.3 cal. ka
BP) led to a rapid transition from assemblages
of brackish-water near-shore
environments to those of modernlike
normal marine environments; modern
environments were established about 8.2
cal. ka ago. Since the core sections from
the inner shelf correspond to the time
when the level of the sea had already
reached its modern values, the changes
in the taxonomic composition of ostracode
assemblages primarily mirror
variations in river runoff.
棘 皮 动 物
2010010394
爪 哇 中 中 新 世 棘 皮 动 物 头 帕 海 胆 类
Goniocidaris 属 的 一 个 新 种 = A new
species of Goniocidaris Desor (Echinoidea,
Cidaroida) from the middle Miocene
of Java. ( 英 文 ). Donovan S
K;Renema W; Lewis D N. Alcheringa,
2010, 34(1): 87 - 95
A distinctive suite of cidaroid echinoid
spines from the middle Miocene
Bulu Formation of Java is described as
Goniocidaris paraplu sp. nov. The apical
primary spines of this species are of
no more than moderate length, with a
thorny shaft bearing linear tuberculations;
the tip is flared and umbrella-like,
with radial, unbranched thorns. The secondary
spines are more elongate and
have incomplete basal discs. No subgeneric
assignment is attempted, which
will require more complete material.
Other Miocene Goniocidaris, mainly
from Australia, but also Qatar, show no
close similarities with the Javan species.
2010010395
中 国 贵 州 省 早 、 中 寒 武 世 Gogiids
( 始 海 百 合 纲 , 棘 皮 动 物 门 ) 的 形
态 、 个 体 发 育 和 异 时 发 生 = Morphology,
ontogeny, and heterochrony in
lower and middle Cambrian Gogiids
(Eocrinoidea, Echinodermata) from
Guizhou Province, China. ( 英 文 ). Parsley
Ronald. Paleontological Journal,
2009, 43(11): 1406-1414 5 图 版 .
Gogiid eocrinoids from the Lower
Cambrian (Balang Formation —
Guizhoueocrinus) and basal Middle
Cambrian (Kaili Formation — Sinoeocrinus,
Globoeocrinus) in Guizhou
Province, China are found in great numbers
and are extremely well preserved as
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