MAMMALIAN REMAINS FROM THE PLIOCENE OF THE HANSHUI RIVER BASIN, SHAANXI

<正> A lot of mammalian remains from Yangjiawan village, the Hanshui River basin, Mianxian, Shaanxi, were collected by a field team of IVPP and the Geological Museum of Shaanxi Province in the autumn of 1984. Fossil mammals found in Yangjiawan Formation include 13 species (including three new species) belonging to 12 genera. This paper will give a preliminary study of the mammalian remains and observation of stratigraphic sections of several localities.     

内蒙古阿左旗乌兰塔塔尔中渐新世的鼠兔科化石及有关问题的讨论

本文记述了发现在内蒙古阿左旗乌兰塔塔尔中渐新世地层中的鼠兔科化石,计两属四种.着重对微型链兔的形态特征做了较多的补充和订正,并对链兔属中种的性质作了初步探讨,取消了步林兔属名,将亚洲的链兔归并成五个种.还对链兔和中华兔的地史分布、某些进化趋势及其他有关问题提出了初步看法.     

THE ARAGONIAN VERTEBRATE FAUNA OF XIACAOWAN, JIANGSU——7. APLODONTIDAE (RODENTIA, MAMMALIA)

<正> The fossils which form the subject of the present study were collected in the recent years from the middle Miocene Xiacaowan Formation at three sites, Songlinzhuang, Shuanggou and Zhengji of Sihong, Jiangsu. Most of the material from the first two sites have been reported previously as Prosciurus sp. (Li et al., 1983). Further study indicates that all the specimens mentioned and the M_1/2 previously assigned to Prosciurus? shantungensis Rensberger et Li (1986) are quite different from those of Prosciurus, but represent a new genus, Ansomys. In some features, the new form resembles Plesispermorphilus? descedens of Europe. For the two taxa a new subfamily Ansomyinae is created. It is morphologically intermediate between Meniscomyinae and Allomyinae, and may be the sister taxon of the higher aplodontids Allomyinae and Aplodontinae.     

低温和光对灌浆期水稻剑叶光合作用的影响

水稻剑叶的光合速率和表观量子效率均随温度的下降而降低,光合速率的下降比表观量子效率的下降明显。低温处理亦引起了最大光合速率和表观量子效率的降低及气孔阻力的升高。这些变化,光照低温处理的大于黑暗低温的;当转入常温后,前者光合速率的恢复慢于后者;恢复期间,有光照的又比无光照的光合速率恢复要慢。     

DISCOVERY OF THE UPPER CHEEK TEETH OF GOBIOLAGUS TOLMACHOVI (LAGOMORPHA, MAMMALIA)

<正> The upper cheek teeth of a Late Eocene laporid, Gobiolagus tolmachovi, are described here for the first time.Of 9 genera of Palaeolaginae of Leporidae, it is only the genus Gobiolagus, whose upper cheek teeth have never been reported before.The specimen was collected by the Sino-Soviet Palaeontological Expedition team in Shara Murun area, Nei Mongol in 1960. Its geological age is considered to be of Late oEcene (Shara Murun Formation).     

中国境内大角鹿属的下颌骨厚度问题

中国境内的大角鹿属是第四纪期间与人类化石相伴生的重要动物化石,过去常根据下颌骨厚度指数来鉴定大角鹿属各个种,现在看来,其角的形态变化,才是最重要依据.在中国大角鹿主要分布于北方地区,早期类型生存于温暖地带,晚期生存于稍寒冷一些地带.     

THE PLIOCENE MICROMAMMALIAN FAUNA FROM JINGLE, SHANXI——A DISCUSSION OF THE AGE OF JINGLE RED CLAY

<正> The Cenozoic deposits of Jingle area was first explored by Teilhard de Chardin & Young in 1929, and six species of mammals: Hipparion houfenense, Gazella blacki Antilospira licenti, Elephas sp., Cervus sp., and Rhinocerotidae gen. indet, were found from the Red Clay in Loc. 1 (Hefeng). Based on the Jingle Fauna, Teilhard de Chardin & Young concluded that the fossil-bearing layer was situated between the typical Hipparion richthofeni Red Clay (Pontian) and the Sanmenian deposits (Polycene) (Teilhard de Chardin & Young, 1930, 1931) and called it "Upper Pontian". Since then, Jingle Formation (or Jingle Red Clay) has been widely used in the stratigraphic generalization of North China (Pei et al., 1963) although its definition and age assignment have never been cleared up. "Jinglean" was put into use for the first time as a stage name by Li et al. (1984, in Chinese) to represent Early Pliocene tentatively: "It may be equivalent to Early Pliocene, more plausibly, it is later ...... Jinglean was temporarily used here to represent Early Pliocene by tradition." In order to make clear the age of Jingle Red Clay and enrich the Hefeng Fauna, a field survey was made in the Summer of 1986 by Chen Xiaofeng and the author. An assemblage of fossil micromammals was unearthed by means of wet-sieving techniques. About 1 ton of sediments from Hefeng (Loc. 86007, or Loc. 1) and Xiagaoai (Loc. 86008, or Loc. 2) in Jingle county (see fig. 1), yielded over 1000 specimens of small mammals. The specimens are from four layers (see table 1), and the present paper only deals with the micromammals from the sand layer and the Red Clay at Hefeng (fig. 2).     

REMARKS ON THE OIOCEROS SPECIES (BOVIDAE, ARTIODACTYLA, MAMMALIA) FROM THE NEOGENE OF CHINA

<正> The genus Oioceros was created by C. Gaillard (1902) based on the species Antilope rothii Wagner, 1857 from the Turolian of Pikermi, Greece. Its diagnosis is that 'Bovidae of small size with long slender muzzle; face bent down on basicranial axis either slightly or to a moderate extent; orbits with expanded orbital roof; horn-cores twisted counter-clockwise in a fairly close spiral of one or two revolutions, widely separate, tilted backward or fairly upright, divergent, with a cross-section almost circular or elliptical, keeled either anteriorly or posteriorly or both; dentition moderately hypsodont, premolar series rather long and slender, molars broad with ribs of medium strength.' (after Pilgrim and Hopwood, 1924, p. 24). Up to now, it has included approximately seventeen species from the Neogene of the Old World (twelve species in Asia, four in Europe and one in Africa).     

水稻幼苗的低温伤害及其与腺苷酸代谢的关系

抗寒性强的早二六14和抗寒性弱的二九丰水稻幼苗,经2～4℃低温处理后,细胞膜透性增加,质膜ATPase水解活性大大提高,而线粒体ATPase磷酸化活性和丙酮酸激酶活性明显下降。从而导致腺苷酸水平尤其是ATP水平急剧下降,能荷值降低.幼苗低温处理4d后回到30℃,早二六14能很快转绿恢复生长,二九丰不能转绿,逐渐死亡。这时,腺苷酸水平及其上升幅度表现出前者高于后者。腺苷酸代谢的失调可能是水稻幼苗低温伤害的一个重要原因。     

冬小麦近轴和远轴叶面气孔对土壤水分胁迫反应的敏感性

当根层土壤水分含量不足,作物体内出现水分胁迫时,小麦叶片两面气孔的反应有明显差异。远轴叶面气孔对水分胁迫的反应比近轴叶面气孔敏感。当出现水分胁迫时,远轴叶面气孔首先收缩,且收缩的程度比近轴叶面气孔大。远轴与近轴叶面气孔阻力的比值(r_(ab)/r_(ab))与根层平均土壤水势(Ψ_s)有关,当Ψ_s大于-50 kPa时,r_(ab)/r_(ad)基本稳定在1.5左右,而当Ψ_s小于-50 kPa时,r_(ab )/r_(ab)随Ψ_s降低而明显增加。