Mesocoprophilus clavatus, a new oxyteline rove beetle (Coleoptera: Staphylinidae) from the Early Cretaceous of China

2013 ◽  
Vol 44 (2) ◽  
pp. 213-220 ◽  
Author(s):  
Chenyang Cai ◽  
Diying Huang
Keyword(s):  
Early Cretaceous ◽  
Lower Cretaceous ◽  
Northeast China ◽  
New Genus ◽  
Yixian Formation ◽  
Liaoning Province ◽  
Abdominal Sternite ◽  
Rove Beetle

Mesocoprophilus clavatus gen. et sp.n., a new rove beetle belonging to the Recent subfamily Oxytelinae, is described and illustrated on the basis of a well-preserved specimen from the Lower Cretaceous Yixian Formation near Huangbanjigou, Beipiao City, Liaoning Province, Northeast China. This new genus can be placed in the extant tribe Coprophilini as supported by its general habitus, sub-contiguous mesocoxae, 5-segmented metatarsi, and abdominal segments III–VII each with two pairs of paratergites. In addition, it displays some features resembling the more basal tribe Euphaniini, including clavate antennae and short and poorly-sclerotized abdominal sternite II.

A new fossil Saldidae (Hemiptera: Heteroptera: Leptopodomorpha) from the Early Cretaceous in China

Zootaxa ◽  
2012 ◽  
Vol 3273 (1) ◽  
pp. 63 ◽  
Author(s):  
WEITING ZHANG ◽  
JINGJING SONG ◽  
YUNZHI YAO ◽  
DONG REN
Keyword(s):  
Early Cretaceous ◽  
Lower Cretaceous ◽  
New Genus ◽  
Yixian Formation ◽  
Liaoning Province

Venustsalda locella gen. et sp. nov. is described and illustrated from the Lower Cretaceous Yixian Formation at Huang-banjigou Village, Liaoning Province, China. The new genus is established based on its unusual six cells on the membrane, with the second cell smallest.

The postcranial skeleton of the iguanodontian ornithopod Jinzhousaurus yangi from the Lower Cretaceous Yixian Formation of western Liaoning, China

2010 ◽  
Vol 101 (2) ◽  
pp. 135-159 ◽  
Author(s):  
Xiaolin Wang ◽  
Rui Pan ◽  
Richard J. Butler ◽  
Paul M. Barrett
Keyword(s):  
New Taxa ◽  
Early Cretaceous ◽  
Lower Cretaceous ◽  
Northeast China ◽  
Strong Support ◽  
Middle Part ◽  
Yixian Formation ◽  
Liaoning Province ◽  
Postcranial Skeleton ◽  
Lower Aptian

ABSTRACTNon-hadrosaurid iguanodontians were the most diverse and abundant group of large-bodied herbivorous dinosaurs during the Early Cretaceous, and were a particularly important component of Laurasian ecosystems. Recent years have seen a dramatic increase in our knowledge of the diversity of this group, with multiple new taxa being described from northeast China. The most complete of these Chinese non-hadrosaurid iguanodontians is Jinzhousaurus yangi, from the middle part of the Yixian Formation (Lower Cretaceous: lower Aptian) of Liaoning Province. Here, we provide the first description of the relatively complete and partially articulated postcranial skeleton of the holotype of Jinzhousaurus, and provide detailed comparisons to closely related taxa. We document additional autapomorphies of Jinzhousaurus that provide strong support for the validity of this taxon.

A new genus of Scolebythidae (Hymenoptera: Chrysidoidea) from the Early Cretaceous of China

Zootaxa ◽  
2012 ◽  
Vol 3504 (1) ◽  
pp. 56 ◽  
Author(s):  
YAPING CAI ◽  
YUNYUN ZHAO ◽  
CHUNGKUN SHIH ◽  
DONG REN
Keyword(s):  
New Species ◽  
Early Cretaceous ◽  
Type Species ◽  
New Genus ◽  
Northeastern China ◽  
Yixian Formation ◽  
Liaoning Province ◽  
Comprehensive Understanding ◽  
The Family ◽  
Two New Species

A new genus Mirabythus Cai, Shih et Ren, gen. nov. (type species, M. lechrius Cai, Shih et Ren, sp. nov.) and M. liae Cai, Shih et Ren, sp. nov. from the family Scolebythidae are described from the Early Cretaceous Yixian Formation of Huangbanjigou Village, Liaoning Province, northeastern China. These findings extend the existence of Scolebythidae to the Early Cretaceous of China, while providing evidence to support Engel and Grimaldi’s hypothesis that the family was widely distributed throughout the Cretaceous. Our two new species with clear venation also provide a comprehensive understanding of the venational changes from the Early Cretaceous to now. A key to the fossil and extant genera of Scolebythidae is provided.

Telmaeshna paradoxica gen. et sp. nov., a new fossil dragonfly (Insecta: Odonata: Anisoptera) from the Yixian Formation, Liaoning, China

Zootaxa ◽  
2008 ◽  
Vol 1681 (1) ◽  
pp. 62 ◽  
Author(s):  
BINGLAN ZHANG ◽  
DONG REN ◽  
HONG PANG
Keyword(s):  
Phylogenetic Relationships ◽  
Lower Cretaceous ◽  
New Genus ◽  
Upper Jurassic ◽  
Yixian Formation ◽  
Liaoning Province ◽  
New Family

Telmaeshna paradoxica gen. et sp. nov., is described from the Upper Jurassic to Lower Cretaceous Yixian Formation, near Chaomidian Village, Beipiao City, Liaoning Province, China. It is included in the Anisoptera: Aeshnoptera: Aeshnomorpha: Panaeshnida, on the basis of the following characters: strongly elongated pterostigma; well-defined anal loop and Rspl; undulated RP2, RP3/4 and MA; divided hypertriangle and discoidal triangle; and prolonged gaff. It cannot be assigned to any described extant or extinct family of Panaeshnida, but we refrain from erecting a new family to accommodate it until more features (forewing, body characters) are known. Consequently, this new genus is provisionally retained as family uncertain. Its phylogenetic relationships within Anisoptera are discussed.

Glabrimycetoporus amoenus, a new tachyporine genus and species of Mesozoic Staphylinidae (Coleoptera) from Liaoning, China

Zootaxa ◽  
2009 ◽  
Vol 2225 (1) ◽  
pp. 63-68 ◽  
Author(s):  
YANLI YUE ◽  
YUNYUN ZHAO ◽  
DONG REN
Keyword(s):  
Lower Cretaceous ◽  
New Genus ◽  
Abdominal Tergite ◽  
Upper Jurassic ◽  
Yixian Formation ◽  
Liaoning Province ◽  
New Genus And Species ◽  
Ne China

A new genus and species of well-preserved fossil Staphylinidae is described and illustrated. Glabrimycetoporus amoenus Yue, Zhao & Ren, gen. et sp. nov. is assigned to the tribe Mycetoporini in the subfamily Tachyporinae based on the following characters: head more or less inserted into prothorox, the tenth abdominal tergite broad and oblong; antennal insertions exposed and located anterior to a line drawn between anterior edges of eyes; body strongly tapered to the narrow head and abdominal apex. The specimen was discovered in the Upper Jurassic–Lower Cretaceous Yixian Formation of Beipiao City, Liaoning Province, NE China.

Discussion on the systematic position of the oxyteline rove beetle Anotylus archaicus Yue, Makranczy & Ren, 2012 (Coleoptera: Staphylinidae)

2013 ◽  
Vol 44 (2) ◽  
pp. 203-212 ◽  
Author(s):  
Chenyang Cai ◽  
Diying Huang
Keyword(s):  
Sexual Dimorphism ◽  
Lower Cretaceous ◽  
Northeast China ◽  
Abdominal Segment ◽  
New Genus ◽  
Systematic Position ◽  
Beetle Species ◽  
Female Specimen ◽  
Rove Beetle ◽  
Comprehensive Comparison

A remarkable oxyteline rove beetle species, Anotylus archaicus Yue, Makranczy & Ren, 2012, has recently been described based on several exquisitely preserved fossil impressions from the Lower Cretaceous Yixian Formation of Liaoning, northeast China. Based on our two new specimens and a comprehensive comparison with extant Anotylus species, we here suggest that all the previously-reported and new specimens, bearing separated gular sutures, sub-contiguous mesocoxae, 5-segmented metatarsi, short and poorly-sclerotized abdominal segment II, and abdominal segments III–VII each with one pair of paratergites, represent a new genus and belong to the basal oxyteline tribe Euphaniini rather than Oxytelini. In addition, it was suggested as the earliest fossil rove beetle demonstrating sexual dimorphism, the male with strong projections of the anterior pronotal angles. However, we suggest that the sexual dimorphism is probably misinterpreted, since the so-called projections can also be found in a female specimen. The projections actually formed when the anterior pronotal margin broke, a condition when the head is retracted into the pronotum.

Dates and rates in ancient lakes: 40Ar–39Ar evidence for an Early Cretaceous age for the Jehol Group, northeast China

1995 ◽  
Vol 32 (9) ◽  
pp. 1426-1431 ◽  
Author(s):  
Patrick E. Smith ◽  
Norman M. Evensen ◽  
Derek York ◽  
Mee-Mann Chang ◽  
Fan Jin ◽  
...  
Keyword(s):  
Early Cretaceous ◽  
Northeast China ◽  
Late Jurassic ◽  
Lacustrine Sediments ◽  
Yixian Formation ◽  
Liaoning Province ◽  
Absolute Calibration ◽  
Small Fault ◽  
Absolute Age ◽  
Good Agreement

The correlation of freshwater sediments in small, fault-bound basins in Liaoning Province, northeast China, known as the Jehol (or Rehe) Group, has been a subject of debate for many years, with biochronological estimates ranging from Late Jurassic to the Cretaceous periods. We have applied the laser 40Ar–39Ar technique to volcanic intercalations and lacustrine sediments from the Yixian Formation at the base of the Jehol Group. Minerals and whole-rock chips from the upper parts of the Yixian Formation give concordant ages with a mean of 121.1 ± 0.2 Ma (1σ). Ages for samples near the base of the Yixian Formation give 121.4 ± 0.6 and 122.9 ± 0.3 Ma, and appear to be synchronous or only slightly older than the top of the formation. Integrated ages of 122 Ma for glaucony from the lacustrine sediments lying stratigraphically between the upper and lower parts of the Yixian are in very good agreement with the absolute age framework provided by the volcanic units. Such disseminated facies of this clay show promise for directly dating lacustrine sediments. All of the above 40Ar–39Ar dates provide an absolute calibration of the Yixian Formation, and show that the whole formation was deposited entirely within Early Cretaceous time over an interval of no more than 2–3 Ma.

Mathesius liaoningensis gen. et sp. nov. of Jehol Biota, a presumptive relative of the clerid or thaneroclerid branches of Cleroidea (Coleoptera)

Zootaxa ◽  
2011 ◽  
Vol 2872 (1) ◽  
pp. 1 ◽  
Author(s):  
JIŘÍ KOLIBÁČ ◽  
DI-YING HUANG
Keyword(s):  
Lower Cretaceous ◽  
New Genus ◽  
Morphological Characters ◽  
Yixian Formation ◽  
Liaoning Province ◽  
Ca 125 ◽  
New Genus And Species ◽  
Ne China ◽  
Jehol Biota

Mathesius liaoningensis, a new genus and species of Cleroidea, probably relative of clerid or thaneroclerid branches of the superfamily, is described from the Lower Cretaceous; it belongs among the oldest and the best preserved cleroid fossils that have been known so far. The unique specimen was found in Yixian Formation (ca. 125 Ma) near Huangbanjigou Village, Beipiao City, Liaoning Province, NE China and belongs to the famous Chinese Jehol Biota. A classification of Mathesius liaoningensis gen. et sp. nov. within Cleroidea is based on cucujiform aedeagus with distinct medial apodeme (strut) and probably paired struts of the phallobase, pentamerous mesoand metatarsi, narrowly separated proand mesocoxae, metacoxae extending laterally to meet elytra. A possible relationship with the clerid or thaneroclerid branches is based on predacious mandibles, absence of large spines in tibiae, lobes at least in mesoand metatarsomeres 2–3 (probably 1–4), probably six visible abdominal ventrites, and shape of body. With the exception of the aforementioned features, the well-preserved fossil shows interesting morphological characters which are figured in detail and discussed in the context of morphology of some recent cucujiform families.

scholarly journals On the systematic and stratigraphic significance of pterosaurs from the Lower Cretaceous Yixian Formation (Jehol Group) of Liaoning, China

Fossil Record ◽  
2000 ◽  
Vol 3 (1) ◽  
pp. 181-206 ◽  
Author(s):  
D. M. Unwin ◽  
J. Lü ◽  
N. N. Bakhurina
Keyword(s):  
Lower Cretaceous ◽  
Fossil Record ◽  
Northeast China ◽  
Yixian Formation ◽  
Liaoning Province ◽  
Sich Eine ◽  
Coastal Regions ◽  
Terrestrial Environments ◽  
Diverse Community ◽  
Systematic Relationships

A reassessment of the systematic relationships of pterosaurs from the Lower Cretaceous Yixian Formation of Liaoning Province, China, shows that <i>Dendrorhynchoides</i> should be reassigned to the Anurognathidae (“Rhamphorhynchoidea”) and that <i>Eosipterus</i> possibly belongs within Ctenochasmatidae (Pterodactyloidea). These pterosaurs formed an integral part of a diverse community that inhabited lowland terrestrial environments in the region of northeast China in the Early Cretaceous. A new compilation of data for the Lower Cretaceous hints at a broad differentiation between pterosaurs that lived in continental habitats (anurognathids, ctenochasmatoids, dsungaripteroids) and those that frequented marine environments (ornithocheiroids). Moreover, there is evidence of further differentiation within continental habitats, between pterosaurs living in lowland and coastal regions (anurognathids. ctenochasmatoids) and those living in more inland environments (dsungaripteroids). The temporal and geographical range extensions for high rank taxa that are implied by the Yixian pterosaurs further emphasise the incompleteness and unevenness of the pterosaur fossil record and its unreliability for biostratigraphic zonation. <br><br> Eine Neubewertung der systematischen Stellung der Flugsaurier von der unterkretazischen Yixian-Formation der Provinz Liaoning, China, zeigt, dass <i>Dendrorhynchoides</i> den Anurognathiden (“Rhamphorhynchoidea”) zugeordnet werden kann und dass <i>Eosipterus</i> vermutlich zu den Ctenochasmatiden (Pterodactyloidea) gehört. Diese beiden Flugsaurier bilden einen integralen Bestandteil einer diversen Fauna, die in der Unteren Kreide ein terrestrisches Flachland-Ökosystem im Nordosten Chinas bewohnte. Fasst man die für die Untere Kreide verfügbaren Daten zusammen, so zeigt sich eine weitgehende Differenzierung zwischen Flugsauriern, die überwiegend in kontinentalen Ökosystemen lebten (Anurognathidae, Ctenochasmatoidea, Dsungaripteroidea) und jenen, die auch oft in marinen Bereichen auftreten (Ornithocheiroidea). Darüber hinaus gibt es auch Hinweise auf eine Differenzierung innerhalb der kontinentalen Habitate, zwischen Pterosauriern, die sich in den Ebenen und küstennahen Bereichen aufhielten (Anurognathidae, Ctenochasmatoidea) und den Bewohnern von mehr küstenfernen Ökosystemen (Dsungaripteroidea). Die von den Taxa der Yixian-Formation angezeigte Erweiterung der stratigraphischen und geographischen Reichweite für Taxa höheren Ranges unterstreichen die Unvollständigkeit und Unausgewogenheit des Fossilberichtes der Flugsaurier und seine Unzulänglichkeit für biostratigraphische Zonierungen. <br><br> doi:<a href="http://dx.doi.org/10.1002/mmng.20000030109" target="_blank">10.1002/mmng.20000030109</a>

The first skiff beetle (Coleoptera: Myxophaga: Hydroscaphidae) from Early Cretaceous Jehol Biota

2012 ◽  
Vol 86 (1) ◽  
pp. 116-119 ◽  
Author(s):  
Chenyang Cai ◽  
Andrew E. Z. Short ◽  
Diying Huang
Keyword(s):  
Early Cretaceous ◽  
Lower Cretaceous ◽  
Northeastern China ◽  
Yixian Formation ◽  
Liaoning Province ◽  
Single Specimen ◽  
Jehol Biota ◽  
Diagnostic Characters ◽  
Aquatic Beetles

The first skiff beetle fossil and earliest myxophagan,Hydroscapha jeholensisn. sp., is described and illustrated on the basis of a single specimen from the Lower Cretaceous Yixian Formation at Huangbanjigou of Beipiao City, Liaoning Province, Northeastern China. Based on the combination of diagnostic characters of this specimen (e.g., minute and fusiform body, short elytra, tapered abdomen, separated meso- and metacoxae, and 3-segmented tarsi), we suggest that it is a definitive representative of Hydroscaphidae belonging to the widespread hydroscaphid genusHydroscaphaLeConte, 1874. It also represents the only impression fossil of the beetle suborder Myxophaga. This find displays great significance for shedding light on the preservation of the minute aquatic beetles, since it is the first well-preserved impression fossil reported for the suborder, rather than amber inclusion.

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