scholarly journals New male pelecinid wasps (Hymenoptera: Pelecinidae) from the Yixian Formation of western Liaoning (China)

2010 ◽  
Vol 61 (6) ◽  
pp. 463-468 ◽  
Author(s):  
Hua Feng ◽  
Chungkun Shih ◽  
Dong Ren ◽  
Chenxi Liu
Keyword(s):  
Sexual Dimorphism ◽  
Northeastern China ◽  
Yixian Formation ◽  
Liaoning Province ◽  
New Genera ◽  
Western Liaoning ◽  
The Family

New male pelecinid wasps (Hymenoptera: Pelecinidae) from the Yixian Formation of western Liaoning (China)Two new genera and speciesAbropelecinus annulatusgen. et sp. nov. andAzygopelecinus clavatusgen. et sp. nov., placed in the subfamily Iscopininae of the family Pelecinidae, are described and illustrated.Sinopecinus viriosusZhang, Rasnitsyn & Zhang, 2002 are re-described. All these male specimens were collected from the Yixian Formation of Beipiao City, Liaoning Province, northeastern China. A key to the male species of the subfamily Iscopininae is given. In addition, sexual dimorphism in Pelecinidae and the paleoclimate of the Yixian Formation are briefly discussed.

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.

Fossil flower bugs (Heteroptera: Cimicomorpha: Cimicoidea) from the Late Jurassic of Northeast China, including a new family, Vetanthocoridae

Zootaxa ◽  
2006 ◽  
Vol 1360 (1) ◽  
pp. 1 ◽  
Author(s):  
YUNZHI YAO ◽  
WANZHI CAI ◽  
DONG REN
Keyword(s):  
New Species ◽  
Northeast China ◽  
Late Jurassic ◽  
Northern China ◽  
Yixian Formation ◽  
Liaoning Province ◽  
New Genera ◽  
Western Liaoning ◽  
New Family ◽  
Fossil Records

An extinct new family of flower bugs, Vetanthocoridae fam. nov., with 2 new tribes, Vetanthocorini and Crassicerini, 8 new genera, and 9 new species (Byssoidecerus levigatus gen. & sp. nov., Collivetanthocoris rapax gen. & sp. nov., Vetanthocoris decorus gen. & sp. nov., Vetanthocoris longispicus gen. & sp. nov., Curvicaudus ciliatus gen. & sp. nov., Mecopodus xanthos gen. & sp. nov., Pustulithoracalis gloriosus gen. & sp. nov., Curticerus venustus gen. & sp. nov., and Crassicerus furtivus gen. & sp. nov.) are described from the Late Jurassic Yixian Formation in western Liaoning Province, China. These fossil records suggest there was an important diversity of flower bugs in the earlier Late Jurassic of northern China. A key to four flower-bug families and a key to the known fossil flower bugs are provided.

scholarly journals First fossil Eccoptarthridae (Coleoptera: Curculionoidea) from the Mesozoic of China

Zootaxa ◽  
2006 ◽  
Vol 1176 (1) ◽  
pp. 59 ◽  
Author(s):  
MING LIU ◽  
DONG REN
Keyword(s):  
New Species ◽  
Late Jurassic ◽  
New Genus ◽  
First Record ◽  
Yixian Formation ◽  
Liaoning Province ◽  
New Genus And Species ◽  
Western Liaoning ◽  
The Family ◽  
A New Species

In this paper a new species Cretonanophyes zherikhini sp. nov. and a new genus and species Abrocar brachyorhinos gen. et sp. nov., all placed within the family Eccoptarthridae, are described and illustrated. They pertain to the Late Jurassic Yixian Formation of the western Liaoning province, China. This finding represents the first record of fossil eccoptarthrids from China.

A Mesozoic species ofAnotylus(Coleoptera, Staphylinidae, Oxytelinae) from Liaoning, China, with the earliest evidence of sexual dimorphism in rove beetles

2012 ◽  
Vol 86 (3) ◽  
pp. 508-512 ◽  
Author(s):  
Yanli Yue ◽  
György Makranczy ◽  
Dong Ren
Keyword(s):  
New Species ◽  
Sexual Dimorphism ◽  
Early Cretaceous ◽  
Northeastern China ◽  
Morphological Features ◽  
Yixian Formation ◽  
Liaoning Province ◽  
Rove Beetles ◽  
Rove Beetle ◽  
A New Species

A new species of the staphylinid subfamily Oxytelinae is described and figured from a series of well-preserved compression fossils of the Yixian Formation (Early Cretaceous), Beipiao City, Liaoning Province, northeastern China. The species is placed in the recent genusAnotylusThomson, 1859 based on typical morphological features for the genus as well as secondary sexual characters. The strong projection of the anterior pronotal angles is a feature also possessed by males of several recent Neotropical taxa in the genus. This is the earliest fossil rove beetle with clearly demonstrable sexual dimorphism.

scholarly journals Completely preserved cockroaches of the family Mesoblattinidae from the Upper Jurassic-Lower Cretaceous Yixian Formation (Liaoning Province, NE China)

2013 ◽  
Vol 64 (4) ◽  
pp. 291-304 ◽  
Author(s):  
Dandan Wei ◽  
Dong Ren
Keyword(s):  
Lower Cretaceous ◽  
Hind Wing ◽  
Upper Jurassic ◽  
Morphological Characters ◽  
Yixian Formation ◽  
Liaoning Province ◽  
Tergal Glands ◽  
The Family ◽  
Left And Right ◽  
First Time

Abstract Although cockroaches were the dominant insects in various Paleozoic and Mesozoic insect assemblages, their general morphology was extremely conservative. One of the most common of them, the Jurassic-Cretaceous family Mesoblattinidae, is described here for the first time on the basis of completely preserved specimens. Ninety-two specimens of Perlucipecta aurea gen. et sp. n. reveal details of head, mandible, male tergal glands and terminal hook; cercal, leg and antennal sensilla. Its congener, P. vrsanskyi is described from the same sediments of the Yixian Formation (Upper Jurassic-Lower Cretaceous). The forewing venation variability of P. aurea, analysed for the first time in this family is nearly identical (CV = 6.23 %) with variability of two species of family Blattulidae that occur at the same locality (CV = 6.22 %; 5.72 %). The transitional nature of morphological characters represented by asymmetry between left and right wings (simple/branched forewing SC and hind wing M) in P. aurea documents the phylogenetic relation between the families Mesoblattinidae and Ectobiidae

A new eucryptodiran turtle from the Early Cretaceous Jiufotang Formation of western Liaoning, China

Zootaxa ◽  
2010 ◽  
Vol 2676 (1) ◽  
pp. 45 ◽  
Author(s):  
CHANG-FU ZHOU
Keyword(s):  
Early Cretaceous ◽  
Cladistic Analysis ◽  
Yixian Formation ◽  
Liaoning Province ◽  
Jehol Biota ◽  
Western Liaoning ◽  
The Third

A new eucryptodiran turtle from the Jiufotang Formation of Lamadong, Jianchang County, represents the third turtle taxon, Liaochelys jianchangensis gen. et sp. nov., from the Jehol Biota of western Liaoning Province, China. This taxon is diagnosed by a character combination including a midline contact of the prefrontals, vertebrals wider than long, third costals strongly expanded distally, and a medial contact of the eighth costals. A preliminary cladistic analysis places Liaochelys jianchangensis along the phylogenetic stem of Cryptodira in a position more derived than the taxa, Manchurochelys manchoukuoensis and Ordosemys liaoxiensis, known from the underlying Yixian Formation. This discovery opens a new window into the osteology and evolution of primitive eucryptodiran turtles.

scholarly journals A new fossil mordellid (Coleoptera: Tenebrionoidea: Mordellidae) from the Yixian Formation of Western Liaoning Province, China

Zootaxa ◽  
2007 ◽  
Vol 1415 (1) ◽  
pp. 49-56 ◽  
Author(s):  
MING LIU ◽  
WENHUA LU ◽  
DONG REN
Keyword(s):  
New Species ◽  
Late Jurassic ◽  
New Genus ◽  
Hind Femur ◽  
Yixian Formation ◽  
Liaoning Province ◽  
New Genus And Species ◽  
Ne China ◽  
Western Liaoning ◽  
Fossil Specimen

A new genus and species, Mirimordella gracilicruralis gen. et sp. nov., in the subfamily Praemordellinae of Mordellidae, is described and illustrated based on a nearly complete fossil specimen. It is from the Yixian Formation of western Liaoning Province, NE China. The diagnosis of the subfamily Praemordellinae is emended based on this new species. Characters such as simple and linear maxillary palpi, simple claws, simple penultimate segments of fore and middle tarsi, small hind coxal plates, slender hind femora, only apical ridges on hind tibiae and tarsi, and no elongated last tergum suggest that Praemordellinae might be the precursor of modern mordellids. The resemblance between the new species and the Late Jurassic Praemordella martynovi indicates close relationships between them and with the tribe Stenaliini in the subfamily Mordellinae. The position of epicoxa and slender hind femur suggest that the new species may be more primitive than Praemordella martynovi and may indicate the age of the Yixian Formation no later than Late Jurassic.

Female polymorphism in Chilothrips strobilus (Thysanoptera: Thripidae), with the first description of the male

Zootaxa ◽  
2017 ◽  
Vol 4358 (1) ◽  
pp. 193 ◽  
Author(s):  
YANZE CUI ◽  
JINGHUI XI ◽  
JUN WANG
Keyword(s):  
Body Size ◽  
Sexual Dimorphism ◽  
Intraspecific Variation ◽  
Abdominal Segment ◽  
Wing Length ◽  
Northeastern China ◽  
Liaoning Province ◽  
Female Polymorphism ◽  
Small Genus ◽  
Different Parts

Polymorphism and sexual dimorphism are common in insects. Thrips have been reported to exhibit intraspecific variation in body size, color and wing length (Mound 2005), also sexual dimorphism in abdominal pore plates, antennal sensoria and fore leg armature (Tyagi et al. 2008). Chilothrips Hood is a small genus that currently comprises seven species (ThripsWiki 2017), three from USA, one from Japan, and three from China. No male has been reported in the three species from China, C. strobilus, C. jiuxiensis and C. hangzhouensis (Hu & Feng 2015), and C. strobilus was described on three female specimens from cones of Pinus in Liaoning Province, northeastern China (Tong & Zhang, 1994). Recently, we have surveyed different parts of northeastern China and collected many male individuals of C. strobilus. We have observed that this species shows sexual dimorphism in mouth cone length, and remarkable variation in form of abdominal segment X among females. 

Geochemical Characteristics and Genesis for Volcanic Rocks of Yixian Formation in Western Liaoning Province

2014 ◽  
Vol 962-965 ◽  
pp. 282-285
Author(s):  
Yan Dong Peng ◽  
Chun Yun Yu ◽  
Xiong Fei Bian
Keyword(s):  
Volcanic Rocks ◽  
Yixian Formation ◽  
Liaoning Province ◽  
Calc Alkaline ◽  
Western Liaoning ◽  
Incompatible Elements ◽  
High K ◽  
The Right ◽  
Compatible Elements ◽  
Comprehensive Study

Volcanic rocks of Yixian Formation were widely distributed in western Liaoning. The Yixian volcanic cycle of early Cretaceous in the Chaoyang basin can be divided into two subcycles. The first subcycle is composed of basalt, basalt andesite and andesite. The second subcycle is composed of trachyandensite and trachyte. The volcanic rocks are characterized by high SiO2, Al2O3, K2O and Na2O, and comparatively low TiO2 components. The volcanic rocks are obviously enriched in incompatible elements, and depleted in compatible elements. The ∑REE of volcanic rocks is high and rich in LREE. The spider patterns are the right-incline, there is a slight low Eu negative abnormality and low Ce negative abnormality. The characteristics show that volcanic rocks of Yixian Formation belong to the high-K calc-alkaline magmatic serious. Comprehensive study shows that the volcanic rocks of Yixian Formation were generated in response to lithosphere extension in the continent intraplate orogenic belt.

scholarly journals Two new genera and five new species of Selachinematidae (Nematoda, Chromadorida) from the continental slope of New Zealand

2013 ◽  
Author(s):  
Daniel Leduc
Keyword(s):  
New Species ◽  
New Zealand ◽  
Sexual Dimorphism ◽  
Continental Slope ◽  
Buccal Cavity ◽  
Posterior Extremity ◽  
New Genera ◽  
Posterior Testis ◽  
The Family ◽  
First Time

Two new genera and five new species of Selachinematidae are described from the New Zealand upper continental slope (350-1240 m depth). Synonchiella rotundicauda sp. nov. is characterised by cephalic setae 0.25 cbd long, mandibles each with two pairs of hooks and two wing-like projections laterally, eight cup-shaped pre-cloacal supplements and short rounded tail. Pseudocheironchus gen. nov. is similar to Cheironchus, but differs from the latter in having a cuticle without lateral differentiation, cephalic setae only slightly longer than the outer labial sensillae, and a posterior buccal cavity with three equal mandibles. Pseudocheironchus ingluviosus gen. et sp. nov. is characterised by mandibles with eight blunt teeth, multispiral amphideal fovea with five turns, and a short rounded tail. Males of this new species with 17-19 cup-shaped pre-cloacal supplements. Males of the genus Cobbionema are described for the first time; C. trigamma sp. nov. is characterised by four long cephalic setae and six smaller outer labial setae in one circle, six rhabdions surrounding the anterior buccal cavity, each with two pairs of pointed projections at their posterior extremities, posterior buccal cavity widening posteriorly, with three pairs of rhabdions fused posteriorly and widening anteriorly, males with two testes pointing anteriorly and with reflexed posterior testis, and no pre-cloacal supplements. Gammanema agglutinans sp. nov. is characterised by a short, stout body often covered in adhering mucus and detritus, cuticle with minute spines, leaf-shaped somatic setae with ducts, sexual dimorphism in the shape of the amphideal fovea (loop-shaped in males and spiral in females), posterior buccal cavity with three pairs of broad, column-shaped rhabdions fused anteriorly, intestine cells with orange-brown granules, and small tubular pre-cloacal supplements. Bendiella gen. nov. is most similar to Halichoanolaimus, but differs from the latter, and all other genera of the family Selachinematidae, in having a cuticle with lateral differentiation consisting of longitudinal rows of larger dots, and from all other genera of the Choniolaiminae in lacking pre-cloacal supplements. Bendiella thalassa gen. et sp. nov. is characterised by amphideal fovea with 5.25 turns, anterior buccal cavity with twelve rhabdions, each with a pair of pointed projections at posterior extremity, posterior buccal cavity with three Y-shaped pairs of slender rhabdions fused from two thirds of distance from anterior ends, and conico-cylindrical tail.

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