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velivola species group of Pterygocythereis
Blake, 1933.
2010010283
美 国 西 部 大 盆 地 下 奥 陶 统 双 股 尾 虫 型
三 叶 虫 一 新 属 Heckethornia, = Heckethornia,
a new genus of dimeropygid trilobites
from the Lower Ordovician
(Ibexian; Tulean and Blackhillsian) of
the Great Basin, western USA. ( 英 文 ).
McAdams N E B; Adrain J M. Canadian
Journal of Earth Sciences, 2009,
46(12): 875-914
Heckethornian. gen. is a morphologically
striking clade of dimeropygid trilobites
known from the Pogonip Group
(Ordovician; Ibexian Series, Tulean and
Blackhillsian stages) of western Utah
and eastern Nevada. It includes seven
species based on silicified material. All
occur in the Fillmore Formation of
western Utah, and four are also known
from the Yellow Hill Limestone of eastern
Nevada. Diagnostic features of
Heckethornia include a highly vaulted
exoskeleton with a tall pygidial “wall”
made of fused outer pleurae, three pairs
of large glabellar spines, two to three
pairs of prominent pygidial spines, a
single (or paired) large occipital spine(s),
and an arc of tubercles on the librigenal
field. Cladistic parsimony analysis suggests
that the genus comprises two subclades,
one including species with a single
median occipital spine, and species
with paired occipital spines or tubercles
in the other. New species are H. smithi,
H. hyndeae, H. numani, H. bowiei, H.
morrisseyi, and H. ballionae.
2010010284
阿 根 廷 东 科 迪 耶 拉 Pascha-Incamayo
地 区 新 的 笔 石 、 胞 石 和 疑 源 类 = New
graptolite, chitinozoan and acritarch records
from the Pascha-Incamayo area,
Cordillera Oriental, Argentina. ( 英 文 ).
Toro B A; Susana de la Puente G;
Rubinstein C V. Comptes Rendus
Palevol, 2010, 9(1-2): 23-30
A new fossil assemblage bearing
graptolites, chitinozoans and acritarchs
is analyzed based on material collected
in the Pascha-Incamayo area, Salta
Province, NW Argentina. The occurrence
of Hunnegraptus copiosus (Lindholm,
1991), associated with specimens
of the genus Tetragraptus (Salter, 1863),
is highly relevant to improve the age assignment
and correlate the fossil-bearing
levels previously assigned to the Devendeus
Formation. Different stages in
the development of the index species of
the Upper Tremadocian H. copiosus
Biozone are described and illustrated.
The precise stratigraphic ranges of the
associated chitinozoans and acritarchs
are discussed, according to the biostratigraphic
analysis, and the stratigraphic
relationships for the studied section are
considered
2010010285
欧 洲 , 亚 洲 和 南 非 的 三 叠 纪 及 侏 罗 纪
Geinitziidae 科 ( 昆 虫 纲 :
Grylloblattida ) 鲜 为 人 知 的 新 发 现
grylloblattids = New and little-known
grylloblattids of the family Geinitziidae
(Insecta: Grylloblattida) from the Triassic
and Jurassic of Europe, Asia, and
South Africa. ( 英 文 ). Aristov D S;
Wappler T; Rasnitsyn A P. Paleontological
Journal, 2009, 43(4): 418-
424 2 图 版 .
The fossil history of the family Geinitziidae
is reviewed. New taxa are described
in the family: Shurabia hissarica,
sp. nov. (Lower Jurassic of Tajikistan),
Sh. shartegica, sp. nov. (Upper Jurassic
of Mongolia), Sh. serrata, sp. nov. and
Ginitzia sagulensis, sp. nov. (both
Lower Jurassic of Kyrgyzstan). The subfamily
Stegopterinae Sharov, 1961 is
synonymized under Geinitziinae Handlirsch,
1906. The genera Minesedes Fujiyama,
1973 and Ominea Fujiyama,
1973 (Upper Triassic of Japan) are synonymized
under Shurabia Martynov,
1937 and Geinitzia Handlirsch, 1906,
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