中国叉齿细蜂属网腰细蜂种团二新种记述(膜翅目:细蜂科)

记录我国叉齿细蜂属Exallonyx叉齿细蜂亚属Exallonyx网腰细蜂种团dictyotus-group2新种:采自陕西和浙江的黑唇叉齿细蜂Exallonyxnigrolabius,sp.nov.和采自贵州的短脊叉齿细蜂Exallonyxbrevicarinus,sp.nov.。模式标本保存于浙江大学寄生蜂标本室。     

中国叉齿细蜂属环柄细蜂种团两新种记述(膜翅目,细蜂科)

记述了我国细蜂科叉齿细蜂属Exallonyx 叉齿细蜂亚属Exallonyx的环柄细蜂种团cingulatus-group 2新种:强脊叉齿细蜂Exallonyx firmus sp.nov.和无凹叉齿细蜂Exallonyx exfoveatus sp.nov..描述了其形态特征并与近似种做了比较.模式标本存于浙江大学寄生蜂标本室.     

湖南茶陵盆地“红层”中的哺乳动物化石

1964年,湖南省地质局区测队在茶陵盆地“红层”中发现了哺乳动物化石,确定了该盆地“红层”中有古新统存在。为了作进一步的研究,1972年中国科学院古脊椎动物与古人类研究所派出湘东队到该盆地进行调查,并发现了一些哺乳动物化石。本文是这两批材料的研究结果。钝脚目 Pantodonta 阶齿兽科 Bemalambdidae 叉齿兽属(新属)Hypsilolambda gen.sp. [词意]Hypsil:“希”,希腊字母γ,意即颊齿的附尖明显分叉如γ的阶齿兽。属的特征与Bemalambda相似的一阶齿兽类。个体大小中等。头骨关节后突和关节窝横向很窄。下颌骨较细弱,水平支下缘呈弧形凸出,无前外凸缘;咬肌窝不显著;下颌髁很小,不呈横轴状;下颌角小,但明显地向后突出超过下颌髁的后缘。P单齿根;P~2—M~3     

广东南雄晚古新世的伪脊齿兽科两新属

本文记述了伪脊齿兽科的两个新属,伟锥脊兽和健壮粤脊兽。文中除对以上两属进行了较详细的描述和对比外,还建立了一新科——伪脊齿兽科,并进一步讨论了伪脊齿兽科的分类位置,以及与冠齿兽科的关系问题。到目前为止,伪脊齿兽科共包括五属,分布仅限于亚洲晚古新世,与冠齿兽的关系较为密切,但还不能肯定究竟哪个属可能是冠齿兽的直接祖先。     

河南卢氏盆地的中兽化石

记述了河南卢氏盆地的中兽科化石材料,命名了强中兽属一新种———李氏强中兽(Harpagolestesleeisp.nov.)。该种P4后附尖非常发育、向颊侧突出;M2的原尖长,前端偏于舌侧、后端偏于颊侧,冠面轮廓近于长方形。报道了东方强中兽(Harpagolestesorientalis)的第一件下颌标本,并对该种的特征进行了补充和修订。描述的一个厚中兽未定种(Pachyaenasp.)可能是该属已知最晚的代表。还鉴定出两件Mongolestes属的标本及一件属种未定的中兽科化石。     

湖北早始新世爪兽新发现及其意义

文章描述了中国湖北李官桥盆地早始新世一奇蹄类新材料,建立了一个新属新种：秉志丹江兽（Danjiangiapingigen,etsp.nov.）,,经过系统分析将其归入了爪兽类群。秉志丹江兽是迄今发现的时代最早的爪兽。该文对爪兽的早期形态演化、爪兽类与古马类可能存在的亲缘关系以及爪兽类的起源等问题也进行了探讨。     

Hesperotherium(黄昏兽 )——后期爪兽一新属

记述了山西天镇早更新世爪兽一新属———Hesperotherium。新属为低冠中等大小的爪兽 ,主要鉴别特征是 :吻部极度缩短 ,门齿、犬齿和第一前臼齿消失 ,前臼齿高度退缩 ,上臼齿宽大于长 ,原尖孤立 ,下臼齿后齿带发育。这是爪兽科最后的代表。中国过去在晚上新世至早更新世地层中发现的Nestoritherium ,很可能都应该归入这个新属。这个属的化石目前仅发现于中国。     

湖北房县豕齿兽一新种

记述了在湖北省岳县罗家沟始新世地层中新近发现的哺乳类,其中包括踝节目豕齿兽科豕齿兽属一新种──房县豕齿兽（Hyopsodusfangxianensissp.nov.）依据该新种的进化水平,进一步确定产化石的油坪组的地质时代为早始新世,但就化石层本身来说,很可能是早始新世晚期。     

中国肯氏兽-山西鳄组合带的新发现之一:山西的肯氏兽类（英文）

近年来在山西省境内沿黄河一带采集到一些新的四足动物化石。在临县白道峪铜川组一段产出的化石中,至少有一种副肯氏兽和一种新的中国肯氏兽——白道峪中国肯氏兽(Sinokannemeyeria baidaoyuensis sp.nov.)。新种以其前额骨向前延伸到达鼻孔后凹一线的特征区别于其他中国肯氏兽。这一材料的长牙未被前颌骨完全包裹,可能是不正常发育所致。在柳林的二马营组地层中识别出不同于中国肯氏兽和副肯氏兽的第三个肯氏兽属。这些新发现增加了中国肯氏兽-山西鳄组合带的组分以及时代延限。     

新疆的肯氏兽类新材料及短吻副肯氏兽的再研究

记述了新疆吐鲁番中三叠统克拉玛依组肯氏兽类一新材料 ,它与短吻副肯氏兽(Parakannemeyeriabrevirostris)正模特征相似 ,确定二者为同种。将中国已知的中国肯氏兽及副肯氏兽属的所有种进行支序分析 ,发现短吻副肯氏兽与中国肯氏兽及副肯氏兽属的其他种构成姊妹群。在与肯氏兽类其他相关属比较的基础上 ,建议以短吻种为基础建立一新属 :西域肯氏兽 (Xiyukannemeyeria)。     

江西池江盆地阶齿兽一新种

<正>1962年在我国广东南雄盆地首次发现了阶齿兽类化石(周明镇等,1973;郑家坚等, 1973),随后在安徽潜山、湖南茶陵、陕西石门、江西大余等地的中古新世地层中相继发现该类动物的化石材料,尤其是在广东南雄、江西大余和湖南茶陵三个地点,有大量的阶齿兽类化石产出。阶齿兽类在中古新世时在亚洲南部是广泛分布的。本文记述的阶齿兽材料是2003年在江西池江盆地发掘到的,此标本与已知的阶齿兽属中各种均有明显差别, 故建立一新种——丁氏阶齿兽(Bemalambda dingae sp.nov.)。     

记广西田东却林缅甸先炭兽的新材料

记述了产自广西田东县却林那读组中一残破的缅甸先炭兽 (Anthracokeryxbirmanicus)头骨。通过对化石的描述 ,对该种特征进行了补充和分析 ,并认为其终生生长的上犬齿可能是用来作为争夺领域和配偶的武器。终生生长的上犬齿的发现 ,证明炭兽类具有性双形。将那读动物群和缅甸邦唐动物群进行对比 ,认为那读组的时代很可能有一部分属于中始新世     

河南潭头、卢氏和灵宝盆地上白垩统一下第三系的划分

在这篇短文中,根据脊椎动物化石的发现,进一步叙述和讨论了豫西潭头、灵宝和卢氏三个盆地的中、新生代地层的划分问题。在这三个盆地的中、新生代堆积物中,属于晚白垩世的有潭头盆地秋扒组和灵宝盆地的南朝组,后一个盆地还可能存在着时代更早的白垩纪地层。在潭头盆地的高峪沟组和大章组中分别找到中古新世的阶齿兽、中兽科和晚古新世的牧兽科、假古猬科化石;在潭头组中发现原恐角兽类和古脊齿兽类化石,时代为早始新世。在灵宝盆地的项城群中尚未找到哺乳类化石,可能包括古新世和始新世早中期的堆积。卢氏盆地的卢氏组和锄钩峪组以及灵宝盆地的川口组和浑水河组的时代为晚始新世。卢氏组下部和川口组或许可延至中始新世。     

Diversity of Menispermaceae from the Paleocene and Eocene of South China

We present here the earliest known Asian fossil records of the Menispermaceae based on fossil fruits from Paleocene and Eocene localities in South China. A new genus and species, Paleoorbicarpum parvum sp. nov., and two new species of Stephania Loureiro, S. ornamenta sp. nov. and S. geniculata sp. nov., are recognized from Paleocene deposits of the Sanshui Basin, Guangdong, and a new occurrence of the widespread Eocene species Stephania auriformis (Hollick) Han & Manchester is recognized from the Maoming Basin, Guangdong. The Paleocene Stephania specimens described here represent the earliest fossil endocarp record of the Menispermaceae in eastern Asia. This discovery shows that the moonseed family had arrived in tropical and humid South China by at least the middle Paleocene, which provides important evidence for the origin and phytogeographic history of the family.     

Diverse tiering patterns in Paleogene flysch trace fossils,Magura nappe,Carpathian Mountains,Poland

Diversified tiering patterns of trace fossils were observed in three Paleogene lithostratigraphic units of the Magura nappe: the Szczawnica Formation (Paleocene‐early Eocene); the Belove?a beds (middle Eocene); and the Piwniczna Sandstone Member of the Magura Formation (middle‐upper Eocene). Sediments of the first unit were deposited under oxygen‐poor conditions, and those of the second and third units under well‐aerated conditions. Thick‐bedded turbidites and fluxoturbidites of the third unit accumulated quickly, in contrast to ‘normal flysch’ of the first and second units. Analyses of tiering patterns show a thickening of tiers following the improvement of sediment oxygenation. Slowly accumulated deposits of ‘normal’ flysch exhibit a more mature, well‐developed tiering pattern than those which accumulated quickly.     

A new species of Lygodium (Schizaeaceae) from the Buxin Formation (middle Paleocene), Sanshui Basin,South China

The morphology, epidermal features and details of the conducting tissues are described for Lygodium sterile pinnules from the oil-bearing middle Paleocene strata of the Sanshui Basin, Guangdong Province, South China. A new species, Lygodium sanshuiense n. sp., is erected on the basis of being petiolulate, with palmately-lobed sterile pinnules that are often strongly dissected and have acute to acuminate apices. Lygodium is typically associated with mesic floras and its presence in the Buxin palaeoflora suggests the overall regional palaeoclimate was subtropical and humid during the middle Paleocene.     

Woodland in a fluvio-lacustrine environment on the dry Mongolian Plateau during the late Paleocene: Evidence from the mammal bearing Subeng section (Inner Mongolia,P.R. China)

In the understanding of the global faunal turnover during the Paleocene–Eocene transition, an important role has been attributed to the Asian continent, although the Asian fossil record for this period is still incomplete. Here we present a multidisciplinary study of the Subeng section (Inner Mongolia, P.R. China), integrating sedimentological, stratigraphical and diverse palaeontological data, in order to reconstruct the palaeoenvironment and to enhance the understanding of the late Paleocene communities that once thrived on the Mongolian Plateau. The Subeng section starts with the Maastrichtian Iren Dabasu Formation directly covered by the late Paleocene Nomogen Formation. This Nomogen Formation is composed of typical lacustrine deposits at the base, covered by fluvio-lacustrine deposits at the top. Both types of deposits provided rich ostracod and charophyte assemblages, closest to those of the Naran Member, Naran Bulak Formation of Mongolia. Palynomorphs from the lake sediments suggest a local flora at Subeng more wooded and closed than reported from elsewhere in this region. The fluvio-lacustrine deposits of the Nomogen Formation have yielded a vertebrate fauna especially rich in mammals. The mammal fauna from Subeng is close to that from Bayan Ulan and typical for the Gashatan Asian Land Mammal Age. The presence of reworked pedogenic carbonate nodules and mud aggregates suggests an at least seasonally dry regional climate. Combined sedimentological and palaeontological data suggest the late Paleocene Nomogen Formation at Subeng was an isolated woodland in a fluvio-lacustrine environment, representing a locally humid environment on the semi-arid Mongolian Plateau. The mammal fauna reflects these differences and shows a number of relatives to mammals from the more humid northeastern Chinese biotic province as well as some North American immigrants.     

Facies,paleoenvironment, carbonate platform and facies changes across Paleocene Eocene of the Taleh Zang Formation in the Zagros Basin,SW-Iran

The Paleocene–Eocene Taleh Zang Formation of the Zagros Basin is a sequence of shallow-water carbonates. We have studied carbonate platform, sedimentary environments and its changes based on the facies analysis with particular emphasis on the biogenic assemblages of the Late Paleocene Sarkan and Early Eocene Maleh kuh sections. In the Late Paleocene, nine microfacies types were distinguished, dominated by algal taxa and corals at the lower part and larger foraminifera at the upper part. The Lower Eocene section is characterised by 10 microfacies types, which are dominated by diverse larger foraminifera such as alveolinids, orbitolitids and nummulitids. The Taleh Zang Formation at the Sarkan and Maleh kuh sections represents sedimentation on a carbonate ramp.

The deepening trends show a gradual increase in perforate foraminifera, the deepest environment is marked by the maximum occurrence of perforate foraminifers (Nummulites), while the shallowing trends are composed mainly of imperforate foraminifera and also characterised by lack of fossils in tidal flat facies.

Based on the facies changes and platform evolution, three stages are assumed in platform development: I; algal and coralgal colonies (coralgal platform), II; coralgal reefs giving way to larger foraminifera, III; dominance of diverse and newly developing larger foraminifera lineages in oligotrophic conditions.     

Microfacies and sequence stratigraphy of the Amapá Formation, Late Paleocene to Early Eocene, Foz do Amazonas Basin, Brazil

On the basis of thin-section studies of cuttings and a core from two wells in the Amapá Formation of the Foz do Amazonas Basin, five main microfacies have been recognized within three stratigraphic sequences deposited during the Late Paleocene to Early Eocene. The facies are: 1) Ranikothalia grainstone to packstone facies; 2) ooidal grainstone to packstone facies; 3) larger foraminiferal and red algal grainstone to packstone facies; 4) Amphistegina and Helicostegina packstone facies; and 5) green algal and small benthic foraminiferal grainstone to packstone facies, divisible locally into a green algal and the miliolid foraminiferal subfacies and a green algal and small rotaliine foraminiferal subfacies. The lowermost sequence (S1) was deposited in the Late Paleocene–Early Eocene (biozone LF1, equivalent to P3–P6?) and includes rudaceous grainstones and packstones with large specimens of Ranikothalia bermudezi representative of the mid- and inner ramp. The intermediate and uppermost sequences (S2 and S3) display well-developed lowstand deposits formed at the end of the Late Paleocene (upper biozone LF1) and beginning of the Early Eocene (biozone LF2) on the inner ramp (larger foraminiferal and red algal grainstone to packstone facies), in lagoons (green algal and small benthic foraminiferal facies) and as shoals (ooidal facies) or banks (Amphistegina and Helicostegina facies). Depth and oceanic influence were the main controls on the distribution of these microfacies. Stratal stacking patterns evident within these sequences may well have been related to sea level changes postulated for the Late Paleocene and Early Eocene. During this time, the Amapá Formation was dominated by cyclic sedimentation on a gently sloping ramp. Environmental and ecological stress brought about by sea level change at the end of the biozone LF1 led to the extinction of the larger foraminifera (Ranikothalia bermudezi).     

江西晚古新世南方有蹄目一新属及其有关问题讨论

本文主要记述了南方有蹄目北柱兽科一新属新种——南方沟柱兽 (Bothriostylops notios gen. et sp. nov.).化石发现于江西池江盆地晚古新世池江组.新属牙齿形态与其他已记述的北柱兽科种类均有一定的差别,但与稀少亚洲柱兽 (Asiostylops spanios) 和原"中华柱兽"进步种 ("Sinostylops" progressus) 在系统关系上比较密切.本文初步讨论了"中华柱兽"属中有关种的分类和归属问题.