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Dinosaur Footprints in Zizhou, Shaanxi Province, China + Jurassic angiosperm from China + more



Ben Creisler
bcreisler@gmail.com


A number of recent papers. (Downloads for the Chinese papers are slow...:):


WANG Baopeng, LI Jianjun, BAI Zhiqiang, GAO Junmin, DONG Shurong, HU
Bailin, ZHAO Suiqin and CHANG Jieqiong (2016),
Research on Dinosaur Footprints in Zizhou, Shaanxi Province, China.
Acta Geologica Sinica 90(1):1-18
http: // 
www.geojournals.cn/dzxben/ch/reader/view_abstract.aspx?file_no=201601002&flag=1

[pdf is free]


In recent years, the discoveries of dinosaur footprints have been
successively reported from Dianshi Town, Zizhou City, Shaanxi
Province. The footprints include the tracks of theropod, ornithopod
and sauropod as well. Actually, the dinosaur footprints were found by
local inhabitants much earlier in history, but not for science. The
slabs bearing the dinosaur footprints were collected for domestic use,
such as building stones, millstones, cellar covers, sheepfold fences,
windlass holders, etc. This paper is to describe the dinosaur
footprints on both sides of three slabs used for cellar covers,
sheepfold fences and windlass holders by the local people. 24 dinosaur
footprints and 4 trackways have been recognized and all of them belong
to theropod. Four kinds of dinosaur footprints are identified,
including 1 new ichnogenus and 2 new ichnospecies: (1) Shanbeipus
caudatus ichnogen. et ichnosp. nov.; (2) Pengxianpus yulinensis
ichnosp. nov.; (3) Eubrontes ichnosp; (4) Kayentapus ichnosp.
Dinosaur-footprint-bearing beds were initially identified as the
Fuxian Formation of the Lower Jurassic. Multipal dinosaur footprints
associated with fragment plant fossils suggest a humid
fluvio-lacustrine environment setting in the Ordos Basin during the
early period of the Jurassic.


==

HAN Gang, LIU Zhongjian, LIU Xueling, MAO Limi, Frédéric M.B. JACQUES
and WANG Xin (2016)
A Whole Plant Herbaceous Angiosperm from the Middle Jurassic of China.
Acta Geologica Sinica 90(1):19-29
http: // 
www.geojournals.cn/dzxben/ch/reader/view_abstract.aspx?file_no=201601003&flag=1

[pdf is free]


In contrast to woody habit with secondary growth, truthful herbaceous
habit lacking secondary growth is restricted to angiosperms among seed
plants. Although angiosperms might have occurred as early as in the
Triassic and herbaceous habit theoretically may have been well adopted
by pioneer angiosperms, pre-Cretaceous herbs are missing hitherto,
leaving the origin of herbs and evolution of herbaceous angiosperms
mysterious. Here we report Juraherba bodae gen. et sp. nov, a whole
plant herbaceous angiosperm, from the Middle Jurassic (>164 Ma) at
Daohugou Village, Inner Mongolia, China, a fossil Lagerst?tten that is
worldwide famous for various fossil finds. The angiospermous affinity
of Juraherba is ensured by its enclosed ovules/seeds. The plant is
small but complete, with physically connected hairy root, stem,
leaves, and fructifications. The Middle Jurassic age recommends
Juraherba as the earliest record of herbaceous seed plants, demanding
a refresh look at the evolutionary history of angiosperms.

===

HAO Ziguo, FEI Hongcai, HAO Qingqing, LIU Lian and Susan Turner (2016)
Distribution and Characteristics of Dinosaur Eggs in China.
Acta Geologica Sinica 90(1):370-375
http: // 
www.geojournals.cn/dzxben/ch/reader/view_abstract.aspx?file_no=201601027&flag=1

[pdf is free]
====


Krzysztof Owocki , Barbara Kremer, Beata Wrzosek, Agata Królikowska &
Józef Kaźmierczak (2016)
Fungal Ferromanganese Mineralisation in Cretaceous Dinosaur Bones from
the Gobi Desert, Mongolia.
PLoS ONE 11(2): e0146293.
doi:10.1371/journal.pone.0146293
http: // journals.plos.org/plosone/article?id=10.1371/journal.pone.0146293

Well-preserved mycelia of fungal- or saprolegnia-like biota
mineralised by ferromanganese oxides were found for the first time in
long bones of Late Cretaceous dinosaurs from the Gobi Desert (Nemegt
Valley, Mongolia). The mycelia formed a biofilm on the wall of the
bone marrow cavity and penetrated the osteon channels of the nearby
bone tissue. Optical microscopy, Raman, SEM/EDS, SEM/BSE, electron
microprobe and cathodoluminescence analyses revealed that the
mineralisation of the mycelia proceeded in two stages. The first stage
was early post-mortem mineralisation of the hyphae by Fe/Mn-oxide
coatings and microconcretions. Probably this proceeded in a mildly
acidic to circumneutral environment, predominantly due to
heterotrophic bacteria degrading the mycelial necromass and liberating
Fe and Mn sorbed by the mycelia during its lifetime. The second stage
of mineralisation, which proceeded much later following the final
burial of the bones in an alkaline environment, resulted from the
massive precipitation of calcite and occasionally barite on the
iron/manganese-oxide-coated mycelia. The mineral phases produced by
fungal biofilms colonising the interiors of decaying dinosaur bones
not only enhance the preservation (fossilisation) of fungal remains
but can also be used as indicators of the geochemistry of the dinosaur
burial sites.

=====

Zoltán Szentesi & Julio Company (2016)
Late Maastrichtian small-sized herpetofauna from Valencia province,
eastern Spain.
Historical Biology (advance online publication)
DOI:10.1080/08912963.2015.1122004
http: // www.tandfonline.com/doi/full/10.1080/08912963.2015.1122004

A Late Maastrichtian microvertebrate assemblage which includes
amphibian remains was recovered from continental deposits of the
palaeontological site of La Solana, Valencia Province, Spain. This
site is composed of variegated mudstones, pedogenically modified,
interbedded with fluvial sand bodies and freshwater limestones lenses,
and has also yielded plant debris, freshwater and oligohaline
invertebrates, abundant fish remains (isolated bones and scales),
turtle plates and archosaur bones. This fossil assemblage, dominated
by aquatic forms, also includes semiaquatic and terrestrial elements,
and may be interpreted as the palaeofauna of a wetland environment
with terrestrial environs. The new material described here consists of
fragmentary remains of an indeterminate albanerpetontid, a salamandrid
and two anuran taxa (an alytid and a palaeobatrachid). The amphibians
from La Solana are typical Laurasiatic taxa. This faunal association
shows broad similarities to other coeval faunas of the Iberian
Peninsula and contrasts with the Upper Campanian–Lower Maastrichtian
sites where Gondwanan elements are frequent.

==

Hermann D. Bermúdez, Jenny García, Wolfgang Stinnesbeck, Gerta Keller,
José Vicente Rodríguez, Michael Hanel, Jens Hopp, Winfried H. Schwarz,
Mario Trieloff, Liliana Bolívar and Francisco J. Vega (2016)
The Cretaceous–Palaeogene boundary at Gorgonilla Island, Colombia,
South America.
Terra Nova 28(1): 83–90
DOI: 10.1111/ter.12196
http: // onlinelibrary.wiley.com/doi/10.1111/ter.12196/abstract

pdf is free:

http: // onlinelibrary.wiley.com/doi/10.1111/ter.12196/epdf

The discovery of a new Cretaceous/Palaeogene (K/Pg) bathyal marine
sequence on Gorgonilla Island, SW Colombia, extends the presence of
Chicxulub impact spherule deposits to the Pacific region of northern
South America and to the Eastern Pacific Ocean. The Gorgonilla
spherule layer is approximately 20 mm thick and consists of
extraordinarily well-preserved glass spherules up to 1.1 mm in
diameter. About 70–90% of the spherules are vitrified, and their
chemical composition is consistent with Haiti (Beloc) impact glass
spherules. Normal size-grading, delicate spherule textures, welded
melt components and an absence of bioturbation or traction transport
suggest that the Gorgonilla spherule layer represents an almost
undisturbed settling deposit.