Jurassic lacewings (Insecta: Neuroptera) of Western Siberia

A lacewing assemblage from the Middle Jurassic of the West Siberian Kubekovo locality, the only know Jurassic lacewing fauna of Russia, is discussed. One new genus and two new species of Osmylidae from Kubekovo, Kubekius multiramosus gen. et sp. nov. and Epiosmylus longus sp. nov. are described. Thaumatomerobius mirabilis Ponomarenko, 1985 is transferred to the family Saucrosmylidae, which has only been recorded in the Middle Jurassic of Daohugou.     

Una nueva especie de Weltrichia (Bennettitales) del Jurásico Medio de la Formación Tecomazuchil (Oaxaca, México)

A new species of Weltrichia (Williamsoniaceae: Bennettitales) is described from the Middle Jurassic of Oaxaca. The specimens come from the Tecomazuchil Formation in the Ayuquila region, at the border between the Oaxaca and Puebla states. Fossils are preserved as impressions and compressions, in a fine-grained sublitharenite sequence deposited in a fluvial environment. Preserved diagnostic characters include: large size; a cup-shaped receptacle showing seven radially arranged and basically fused microsporophylls bearing synangia. Microsporophylls are ornamented with longitudinal striations and fine brittled hairs on the edge of their wide base, and taper into a narrow distal tip. In the adaxial part of the microsporophylls seven to nine synangia are observed. These characters differentiate the new species Weltrichia mixtequensis from all previously recorded species from Mexico or elsewhere. The presence of this new species in the Middle Jurassic strata of the Ayuquila region add to the scarce fossil record of microsporangiate structures in the Jurassic flora of Mexico.     

Middle Jurassic fossils of the genus Sharasargus from Inner Mongolia, China (Diptera: Archisargidae)

To date, only two species of the genus Sharasargus are known. These Upper Jurassic species were found in Mongolia and Kazakhstan, respectively. We herein describe two new species from the Middle Jurassic, which were found in Inner Mongolia, China. They are the oldest known fossils of this genus. A key to Sharasargus species is given.     

美蝎蛉化石在中国首次发现(昆虫纲,长翅目)

描述了美蝎蛉化石2新属2新种:Tsuchingothaumashihi gen.et sp.nov.,Typhothauma yixianensis gen. et sp.nov..化石采自于中国东北侏罗纪非海相地层中.这是美蝎蛉化石在中国的首次发现.新的化石表明美蝎蛉的早期分异在中侏罗世就已存在.     

A new species of Plesioblattogryllus Huang, Nel et Petrulevičius (Grylloblattida: Plesioblattogryllidae) from the Middle Jurassic of China

A new species of grylloblattid insects, Plesioblattogryllus minor, sp. nov. (Gryllobattida: Plesioblattogryllidae), is described from the Middle Jurassic Daohugou locality (Inner Mongolia, China). The value of the diagnostic features of the families Plesioblattogryllidae and Blattogryllidae is briefly discussed.     

First diagnostic marine reptile remains from the aalenian (middle jurassic): a new ichthyosaur from southwestern Germany

Background

The Middle Jurassic was a critical time in the evolutionary history of ichthyosaurs. During this time interval, the diverse, well-studied faunas of the Lower Jurassic were entirely replaced by ophthalmosaurids, a new group that arose sometime prior to the Aalenian-Bajocian boundary and by the latest middle Jurassic comprised the only surviving group of ichthyosaurs. Thus, the Middle Jurassic Aalenian-Bathonian interval (176–165 million years ago) comprises the time frame during which ophthalmosaurids not only originated but also achieved taxonomic dominance. However, diagnostic ichthyosaur remains have been described previously from only a single locality from this interval, from the Bajocian of Argentina.

Methodology/Principal Findings

In this paper, we describe a new species of ichthyosaur based on a partial articulated specimen from the Middle Jurassic of southwestern Germany. This specimen was recovered from the Opalinuston Formation (early Aalenian) and is referable to Stenopterygius aaleniensis sp. nov. reflecting features of the skull and forefin. The genus Stenopterygius is diverse and abundant in the Lower Jurassic of Europe, but its presence has not previously been confirmed in younger (Middle Jurassic) rocks from the northern hemisphere.

Conclusions/Significance

This specimen represents the only diagnostic ichthyosaur remains reported from the Aalenian. It bears numerous similarities in size and in morphology to the Lower Jurassic species of the genus Stenopterygius and provides additional evidence that the major ecological changes hypothesized to have occurred at the end of the Toarcian took place sometime after this point and most likely did not occur suddenly. There is currently no evidence for the presence of ophthalmosaurids in the northern hemisphere during the Aalenian-Bathonian interval.     

A specialized new species of Ashicaulis (Osmundaceae,Filicales) from the Jurassic of Liaoning,NE China

A new species of structurally preserved fern rhizome, Ashicaulis plumites (Osmundaceae, Filicales), is described from the Middle Jurassic Tiaojishan Formation in western Liaoning Province, NE China. The new species is characterized by a peculiar sclerenchyma mass in the petiolar vascular bundle concavity. This sclerenchyma mass varies from a linear-shape to a mushroom-like shape with a remarkable outward protuberance, which distinguishes the present new species from other Ashicaulis species. Such a protuberance is very rare among osmundaceous ferns, and should represent a unique type for sclerenchymatous tissue in the osmundaceous vascular bundle concavity. Recognition of the peculiar structure of this new fossil species enriches anatomical diversity of permineralized osmundaceous ferns, indicating that the family Osmundaceae might have experienced a remarkable diversification during the Middle Jurassic in NE China. The new species show anatomical similarities to Osmunda pluma Miller from the Palaeocene of North America. The occurrence of A. plumites in the Middle Jurassic of China provides a new clue for understanding the evolution of some members of the living subgenus Osmunda.     

记新疆准噶尔盆地中侏罗世—新甲龙

一小的甲龙,作为甲龙科(Ankylosauridae)中一新属新种,明星天池龙(Tianchisaurus nedegoapeferima gen. et sp. nov.)被记述。化石是1974年,新疆大学地质地理系的师生在新疆阜康县三工河地区作野外实习时采得,其产地的地层层位经新疆石油管理局东疆石油指挥部彭希龄核对为中侏罗世头顿河组。化石包括破的头骨碎片,五个颈椎,六个背椎,一个完整荐部(由七个椎体组成),三个尾椎,和许多膜质的甲胄,甲板,以及一些四肢骨。标本编号:V.10614,新属新种的特征是:一个小的,原始的,体长约三米的甲龙;头骨较高,有小的膜质的甲片复盖;下颚高,外侧无甲片复盖,有纵的饰纹,环椎与枢椎不愈合;颈椎椎体短,双凹型;背椎椎体较长,双平型,横突与背肋不愈合;荐部由七个愈合脊椎组成:前两个是背椎,形成一个荐前棒(presacral rod),最后的一个是尾椎,四个荐椎的椎体是整个椎柱中最大的,荐椎的神经棘愈合,形成一个纵的板状脊,远端的尾椎愈合形成小的,扁的尾锤。股骨直,骨干上有饰纹,第四转子呈嵴状。蹠骨和趾骨为甲龙型,与晚期甲龙的蹠骨和趾骨比较显得瘦小。在肩部有一个由四对大的膜质的甲板愈合形成肩甲带,甲板厚有发育的中嵴。在身体覆盖着许多大小不同,形状各异的甲片。Tianchisaurus nedegoapeferima的种名是应著名科幻电影导演Steven Splelberg之约请赠送给大型科幻电影片-侏罗纪公园之明星们:Sam Naill, Laura Dern, Jeff Goldblum, Richard Attenborough, Bob Peck和Martin Ferrsro.我们称之明星天池龙(Tianchisaurus nedegoapeferima gen. et sp. nov.)。Tianchisaurus nedegoapeferima是目前甲龙亚目在亚洲的最早纪录。它的发现将甲龙的化石记录推到中侏罗世。     

A new hawker dragonfly from the Middle Jurassic of China (Odonata: Aeshnoptera)

A new genus and species Linqibinia panae of paracymatophlebiid hawker dragonfly is described from the Middle Jurassic Haifanggou Formation (Inner Mongolia, China). Previously only known from Karatau in Kazakhstan, the discovery of another member of this family extends its range across Central Asia. It confirms that the Aeshnoptera was among the most diverse odonatan clades during the Middle-Late Jurassic.     

内蒙古道虎沟中侏罗世原褶蚊科化石记述(昆虫纲,双翅目,原褶蚊科)

描述原褶蚊科Eoptychopteridae Handlirsch,1906化石3新种,华美刻痕原褶蚊Crenoptychoptera decorosa sp.nov.,普通刻痕原褶蚊Crenoptychoptera vulgaris sp.nov.,近刻痕原褶蚊Crenoptychoptera vicina sp.nov..所有标本均采自内蒙古宁城道虎沟中侏罗世九龙山组,模式标本保存在首都师范大学生命科学学院.     

A new long-proboscid genus of Pseudopolycentropodidae (Mecoptera) from the Middle Jurassic of China and its plant-host specializations

We describe a new genus and species of Mecoptera with siphonate mouthparts, Sinopolycentropus rasnitsynigen. et sp. n., assigned to the family Pseudopolycentropodidae Handlirsch, 1925. The specimen was collected from late Middle Jurassic nonmarine strata of the Jiulongshan Formation in Inner Mongolia, northeastern China. The new material provides additional evidence for an early diversification of pseudopolycentropodids that was ongoing during the Middle Jurassic. This diversity also adds to the variety of known pseudopolycentropodids with tubular proboscides that apparently fed on ovulate fluids produced by Mesozoic gymnosperms.     

Yanliaoa, an extinct genus of Cupressaceae s. l. from the Middle Jurassic,northeastern China

Yanliaoa is a common fossil in the Middle Jurassic of western Liaoning, eastern Inner Mongolia and northern Hebei Province, China. It is an important element of the Yanliao biota. The genus was established by Pan in 1977 for fossil plants from the Middle Jurassic Haifanggou Formation in Xiasanjiaochengzi, western Liaoning Province, and in present paper, the genus Yanliaoa is studied based on new material. Pan never designated a type specimen and his fossil material cannot be located. We designate a type specimen here for Yanliaoa, so that the genus name Yanliaoa remains valid. Yanliaoa sinensis Pan emend. Tan et al., is found in the same locality and formation as the lost specimens, Y. sinensis of Pan, 1977. Yanliaoa daohugouensis n. sp., a new species with epidermal anatomy, is from the Middle Jurassic Daohugou, Inner Mongolia. A holotype is also selected from the new material for this new species. Characters of the leafy shoots and ovulate cones of Yanliaoa are emended. The epidermal anatomy of this genus is described for the first time. Compared with other extant and extinct species of Cupressaceae s. l., the current species can be distinguished from any known species both by the leafy shoot characters and its epidermal anatomy. It further indicates that Yanliaoa is an extinct and endemic conifer found in the Middle Jurassic of northeastern China.     

A remarkable new genus of Procercopidae (Hemiptera: Cercopoidea) from the Middle Jurassic of China

Jurocercopis grandis, a new genus and species belonging to Procercopidae (Hemiptera: Cercopoidea), is described, based on seven specimens from the Middle Jurassic of Daohugou, China. It differs distinctly from other genera as follows: body and wings obviously large; pronotum with posterior margin straight; tegmen with costal margin convex at about basal 0.4 wing length; hind basitarsomere with a row of apical small teeth.     

New saldoid bug of the family archegocimicidae (Hemiptera: Heteroptera: Leptopodomorpha) from the Middle Jurassic of Eastern Siberia

A new genus and species of saldoid bugs, Kubecora ignamica gen. et sp. nov. (Heteroptera, Archegocimicidae), is described from the Middle Jurassic (Itat Formation) locality Kubekovo, East Siberia.     

Sunosuchus (Archosauria, Crocodyliformes) from the Toutunhe Formation (Middle Jurassic) of the Southern Junggar Basin (Xinjiang, NW-China)

A new specimen of the widespread Middle Jurassic to Lower Cretaceous Asian gonipholidid crocodilian genus Sunosuchus is described on the basis of a partial skeleton from the Upper Toutunhe Formation (Middle Jurassic, ?Bathonian-Callovian) of Liuhonggou, SW of Urumqi, Xinjiang Uygur Autonomous Region, People’s Republic of China. The specimen is represented by a partial mandible, teeth, vertebrae, limb and girdle bones and osteoderms. It can be distinguished from other nominal species of the genus by a unique combination of characters: slightly heterodontous dentition, strongly sculptured posteroventral part of the mandible, short fenestra mandibularis, convex dorsal surface of the retroarticular process, keeled cervical vertebral centra and ventral osteoderms with a distinctive sculpture of wide pits and narrow ridges. The heterodontous dentition is a potential autapomorphy of this form. The new specimen is closest in morphology to material described recently from the Callovian of Kirghisia as Sunosuchus sp. It represents the second Middle Jurassic record of the genus, the first crocodile from the Toutunhe Formation, the first substantial crocodile find from the Mesozoic of the Southern Junggar Basin, and the first Middle Jurassic record of Sunosuchus from China. This extends both the paleobiogeographical distribution of the genus in Asia and its stratigraphic distribution in China considerably.     

New Phoenicopsis leaves (Czekanowskiales) from the Middle Jurassic Daohugou Biota,China and their roles in phytogeographic and paleoclimatic reconstruction

The Middle Jurassic Jiulongshan Formation, distributed in the Daohugou area, Ningcheng County, Inner Mongolia, China, is famous for yielding abundant, well-preserved fossil vertebrates and invertebrates. However, only a few fossil plants have been reported to date. In this paper, one new species of Czekanowskiales, Phoenicopsis (Windwardia) daohugouensis n. sp. is described based upon leaf morphology and epidermal characters. The new species represents the first record of Czekanowskiales from the Daohugou Biota. The discovery of the new species reveals the significance of the Daohugou flora as one of the deciduous forests in the temperate-warm temperate zone of Eurasia during the Middle Jurassic.     

Middle to Late Jurassic radiolarians from Sicily (Italy)

Middle and Upper Jurassic radiolarian faunas from two sections of Sicily are compared with the previously proposed zonations. The ages of the faunas are estimated by correlation with these zonations and by concurrent range zone. The faunas could be assigned to the Bathonian or earlier late Tithonian or early Berriasian. Two new spumellarian species (Bernoullius furcospinus andBernoullius rectispinus) from Middle Jurassic are described.     

A new decapod crustacean faunule from the Middle Jurassic of north‐west France

Abstract: Decapod crustacean material collected recently from the lower Callovian (Middle Jurassic) in Maine‐et‐Loire (north‐west France) comprises two new species of prosopid and one new species of tanidromitid crabs, of the genera Nodoprosopon and Tanidromites, respectively. Also represented in this faunule is a probable paguroid anomuran, in the form of isolated chelae here assigned to the genus Orhomalus, as well as appendicular remains of unknown affinity; some of the latter might belong to prosopid crabs. These anomurans and brachyurans co‐occur with a diverse benthic fauna in limestones with abundant iron ooids; their main interest lies in the fact that they add valuable data to the rather poor record of Middle Jurassic decapod crustaceans.     

内蒙古东胜中侏罗世延安组孢粉组合

研究了内蒙古东胜罕台川、碾盘梁沟和柳沟 3个剖面中侏罗世孢子花粉化石 34属 6 3种 ,包括 2个新种。基于 10个样品中发现的 386 3粒孢子花粉化石的鉴定和统计 ,建立东胜地区延安组孢粉组合。该组合中蕨类植物孢子有 19属 37种 ,含量占 46 %～ 49% ,最低为 39%。裸子植物花粉略占优势 ,有 15属 2 6种 ,含量为 5 1%～ 5 4% ,最高达 6 1%。与国内外相关资料对比结果表明该孢粉组合的地质时代应属中侏罗世巴柔期。孢粉植物群反映研究区在中侏罗世早期为暖温带或亚热带的暖湿气候     

New archisargids from China (Insecta: Diptera)

The extinct family Archisargidae, which was rich in the Mesozoic, has been found in China, Kazakhstan and Mongolia. By now, six genera and 14 species have been found in Inner Mongolia and Liaoning Province of China. In this paper, two new species of the genus Mesosolva Hong, 1983 and a new genus Brevisolva gen. nov., represented by a new species belonging to the Archisargidae, are described from the Middle Jurassic deposits of Daohugou, Inner Mongolia. A key to the species of Mesosolva is given.