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Phoronida and Brachiopoda and that at
least some tommotiid sclerites are homologous
precursors of the shells of organophosphatic
brachiopods. Here we
show that the shell microstructure of Eccentrotheca
and Paterimitra share substantial
similarities with paterinid
brachiopods. While paterinids possess an
overall brachiopod morphology, their
microstructure appears more similar to
Eccentrotheca and Paterimitra than to
nonpaterinate lingulids. These findings
strongly support the existence of a
brachiopod total group that is solidly
rooted within tommotiids, and identify
the organophosphatic skeletal composition
as plesiomorphic with calcareous
shells as derived. The microstructural
changes of the proposed tommotiidbrachiopod
transition probably reflect an
adaptation to fluctuating food and phosphorous
intake that came with the switch
to a sessile life style at the base of the
tommotiid clade.
2010010181
莫 斯 科 州 格 舍 尔 阶 地 层 中 腕 足 类 线 纹
长 身 贝 科 从 中 到 晚 石 炭 世 的 演 化 规 律
= Gzhelian brachiopods of the family
Linoproductidae Stehli and regularities
in their evolution in the Middle and Late
Carboniferous of the Moscow Region.
( 英 文 ). Lazarev S S. Paleontological
Journal, 2009, 43(4): 381-390 3 图 版 .
This paper completes the revision of
the Middle and Late Carboniferous
brachiopods of the family Linoproductidae
from the Moscow Region. The species
cannot be completely described according
to the methods previously elaborated
by the author because of the poor
state of preservation of the material from
Gzhelian deposits. Problems of the generic
diagnostics of the Gzhelian linoproductids
are discussed; a new species,
Linispinus parvus, is described from the
uppermost Kasimovian deposits that
have been referred to the Gzhelian Stage.
Regularities in the group evolution in
the Moscovian, Kasimovian, and Gzhelian
ages are analyzed.
2010010182
与 过 滤 系 统 发 育 相 关 的 古 生 代 腕 足 类
群 落 演 变 = Changes in the communities
of Paleozoic brachiopods due to
their development of their filtering system.
( 英 文 ). Afanasjeva G A. Paleontological
Journal, 2009, 43(11): 1378-
1389 20 图 版 .
Onward changes in the communities
of Paleozoic articulated brachiopods
were mainly connected with the improvement
of the function of their filter
feeding system, which is responsible for
the feeding of animals. Three major
routes of improvement are known: (1)
feeding using a primitive lophophore
and specialized mantle (orders Strophomenida,
Chonetida, and Productida);
(2) increased complexity and enlargement
of the spirolophe and the appearance
of the spiral brachidium (orders
Atrypida, Spiriferida, and Athyridida);
(3) development of the protective structures
preventing ingestible particles into
the inner cavity of the shell (order
Rhynchonellida). The most effective
was the third variant that allowed rhynchonellids,
which appeared in the Ordovician,
to live up to recently and survive
after two largest extinctions in the history
of the group development: in the
Late Devonian and at the Permian-
Triassic boundary.
2010010183
现 生 或 化 石 腕 足 类 微 形 化 原 因 分 析 =
Reasons of micromorphism in modern
or fossil brachiopods. ( 英 文 ).
Pakhnevich A V. Paleontological Journal,
2009, 43(11): 1458-1468 6 图 版 .
Mass samples of the micromorphic
recent (Hemithyris psittacea, Eucalathis
murrayi, Macandrevia cranium,
Megathyris detruncate, Argyrotheca
cuneata, Argyrotheca cordata) and fossil
Silurian (Microsphaeridiorhynchus
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