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2010010094
中 生 代 买 麻 藤 类 和 早 期 被 子 植 物 的 多
样 性 = Diversity of Mesozoic gnetophytes
and the first angiosperms. ( 英 文 ).
Krassilov V A. Paleontological Journal,
2009, 43(10): 1272-1280 1 图 版 .
A provisionary system of gnetophytes
is proposed, including recently discovered
Mesozoic members. The following
principal characters are used, in descending
order of significance: strobilar
structure of ovulate organs (eugnetophytes)
as opposed to flowerlike cupules
and their aggregates (anthognetophytes),
radial vs. bilateral symmetry of seed cupules,
and morphological distinctions in
the pollen organs, pollen micromorphology
and exine ultrastructure. The fossil
members show mosaic associations of
morphological traits, which attests to
different evolution rates of their ovulate
and pollinate structures. The system includes
two superorders and eight orders,
several of which are new. A dichotomous
key is provided to differentiate between
genera of fossil gnetophytes based
on ovulate structures. Two stages in evolution
of gnetophyte morphological diversity
are recognized: first in the Triassic
and then in the Early Cretaceous, the
latter was associated with the origin of
new type herbaceous wetland communities.
Angiosperms or some of them
might have originated as elements of
gnetophyte diversity in such communities.
2010010095
阿 拉 斯 加 半 岛 北 部 的 晚 古 新 世 植 物
群 : 植 物 通 过 白 令 陆 桥 的 迁 移 及 环 境
变 化 的 影 响 = Late paleocene flora of
the northern Alaska Peninsula: the role
of transberingian plant migrations and
climatic change. ( 英 文 ). Moiseeva M G;
Herman A B; Spicer R A. Paleontological
Journal, 2009, 43(10): 1298-1308 6
图 版 .
For the first time, the Late Sagwon
Flora is described from the upper beds
of the Prince Creek Formation (Upper
Paleocene) at the Sagavanirktok River
(northern Alaska Peninsula). The flora is
dominated by the angiosperm Tiliaephyllum
brooksense Moiseeva et Herman
sp. nov. and conifer Metasequoia
occidentalis (Newb.) Chaney. The Late
Sagwon Flora is most similar to the
Danian or Danian-Selandian flora from
the middle part of the Upper Tsagayan
Subformation (Amur Region) and lower
part of the Wuyun Formation (Heilongjiang
Province, China). This similarity
allows us to hypothesize that the genus
Tiliaephyllum, which dominated in the
Late Tsagayan Flora, migrated via the
Bering Land Bridge from southern paleolatitudes
of the Far East to high latitudes
of the Arctic Pacific, due to the
progressively warming climate of the
Paleocene. Additional new angiosperm
species are described from the Late
Sagwon Flora: Archeampelos mullii
Moiseeva et Herman sp. nov., Tiliaephyllum
brooksense Moiseeva et Herman
sp. nov., and Dicotylophyllum sagwonicum
Moiseeva et Herman sp. nov.
2010010096
Valdai 高 地 南 部 晚 更 新 世 果 实 种 子 化
石 组 合 = Upper pleistocene carpological
assemblages from the south of the
Valdai Upland. ( 英 文 ). Zyuganova I S.
Paleontological Journal, 2009, 43(10):
1351-1362 4 图 版 .
Paleocarpological study was accomplished
at four Upper Pleistocene sections
of the Central Forest State Nature
Biosphere Reserve (southern of Valdai
Uplands). Sixty-five taxa of higher
plants were found in the fossil flora of
the region. Two carpological assemblages
were distinguished reflecting different
ecological and climatic conditions.
The earlier assemblage is typical of Mikulino
(Eemian) Interglacial, and the
later corresponds to interglacial/glacial
transition and the beginning of Early
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