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Yu. Paleontological Journal, 2009, 43(1): 12-
18 6 图 版 .
Morphological and quantitative characteristics
of the growth variability of two Parvancorina
species were analyzed based on new
abundant material from the Vendian of the
White Sea. Growth variability in this problematic
taxon appears to be wider than previously
suggested. We found allometric growth
in the White Sea population of P. minchami
Glaessner, 1958, in contrast to isometric
growth in Australian representatives of the
species. Another White Sea species, P. sagitta
Ivantsov, 2004, shows gradual formation of
anchor-shaped structure in juveniles. Based on
Australian material, it was previously believed
that this structure did not change during ontogeny.
These two distinctive features together
with a strong variability of age-related measurements
distinguish Parvancorina from other
early arthropods (Scania, Primicaris), and cast
doubt on the growth pattern as an argument in
favor of the arthropodan nature of Parvancorina.
2010040304
阿 巴 拉 契 亚 盆 地 宾 夕 法 尼 亚 州 介 形 亚 纲 动
物 中 的 Bythocytheridae, Healdiidae, and
Bairdiocyprididae 三 科 = The ostracode
families Bythocytheridae, Healdiidae, and
Bairdiocyprididae in the Pennsylvanian of the
Appalachian Basin. ( 英 文 ). Richard D Hoare.
Bulletin of American Paleontology, 2007,
(372): 1-44
2010040305
中 国 内 蒙 古 中 侏 罗 世 一 脉 翅 目 新 属 种 = A
new fossil lacewing genus and species from
the Middle Jurassic of Inner Mongolia, China.
( 英 文 ). Wang Yongjie; Liu Zhiqi; Ren Dong.
Acta palaeontologica Polonica, 2009, 54(3):
557-560
A new fossil lacewing, Tenuosmylus
brevineurus gen. et sp. nov., was collected
from an outcrop of Middle Jurassic strata in
the village of Daohugou. The new genus is
assigned to Gumillinae based on eleven defining
characteristics of the subfamily. The affiliation
of Tenuosmylus including other five
genera of the subfamily is discussed. Our result
supports the opinion that Epiosmylinae
was a junior synonym of Gumillinae, which is
lekely a relic of ancient osmylids based on
similarity of rorewing venation. A key is
given to differentiate six known genera within
Gumillinae.
2010040306
加 拿 大 不 列 颠 中 寒 武 世 Burgess 页 岩 节 肢
动 物 Isoxys 属 两 个 种 的 软 体 部 分 的 保 存 =
Soft-part preservation in two species of the
arthropod Isoxys from the middle Cambrian
Burgess Shale of British Columbia, Canada.
( 英 文 ). Garcia-Bellido D C; Vannier J;
Collins D. Acta palaeontologica Polonica,
2009, 54(4): 699-712
More than of forty specimens from the
middle Cambrian Burgess Shale reveal the
detailed anatomy of Isoxys, a worldwide distributed
bivalvee arthropod represented here
by two species, namely Isoxys acutangulus
and Isoxys longissimus. I. acutangulus had a
non-mineralized headshield with lateral pleural
folds (="valves" of precious authors) that
covered the animal's body almost entirely,
large frontal spherical eyes and a pair of
uniramous prehensile appendages bearingstout
spiny outgrowths along their anterior margins.
The 13 following appendages had a uniform
biramous design- i. e., a short endopod and a
paddle-like exopod fringed with marginal setae
with a probable natatory function. There
are now seven Isoxys species known with softpart
preservation.
2010040307
Cd2 + , Zn2 + 和 Cu2 + 对 Physocypria
kraepelini( 介 形 纲 ) 的 急 性 毒 性 实 验 = Acute
toxicity experiment of Cd2 + , Zn2 + and Cu2
+ in Physocypria kraep el ini(Ostracoda). ( 中
文 ). 陈 仕 梅 ; 禹 娜 ; 周 宇 阳 ; 张 虔 ; 李 二 超 ; 陈 立
侨 . 微 体 古 生 物 学 报 , 2010, 27(2): 118-124
采 用 急 性 毒 性 实 验 方 法 , 研 究 了 水 环 境 中
常 见 重 金 属 离 子 Cd2 + ,Zn2 + 和 Cu2 + 对
介 形 类 Physocypria kraepel ini 的 急 性 毒 性
作 用 。 实 验 过 程 按 等 差 数 间 距 设 置 6 个
Cd2 + 浓 度 梯 度 , 按 等 比 数 间 距 设 置 9 个
Zn2 + 和 9 个 Cu2 + 浓 度 梯 度 。 结 果 表
明 :24 、48 、72 和 96 h 时 Cd2 + ,Zn2 + 和
Cu2 + 对 P. k raepelini 的 半 致 死 浓 度 ( L
C50 ) 分 别 为 1. 37 、0. 39 、0. 21 和 0. 04
mg/ l ,217. 27 、34. 36 、23. 77 和 8. 42 mg/
l , 及 7. 28 、1. 26 、0. 65 和 0. 39 mg/ l 。 通
过 比 较 发 现 , P. kraepel ini 可 以 作 为 水 体 受
Cd2 + 污 染 的 判 别 生 物 ; P. kraepel ini 对 Cd2
+ ,Zn2 + 和 Cu2 + 的 安 全 浓 度 分 别 为 0.
004 、0. 842 和 0. 039 mg/ l , 接 近 国 家 渔 业
水 质 标 准 ( GB11607289) 规 定 的 限 值 , 因 此
其 还 可 以 作 为 渔 业 用 水 的 判 别 生 物 。
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