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| The genus Tyromyces was established by Karsten in 1881. During the past hundred years many taxonomists were of different opinions on the concept of this genus. In this paper the. new generic concept of the genus is adopted. The generic characteristics are as follows: fresh fruitbody soft, separable and succulent; context fleshy, homogenous, after drying fragile, easily powdery and caseous. Hyphal system monomitic or dimitic. If dimitic it consists of generative hyphae and binding or skeletal hyphae. The hyphal... The genus Tyromyces was established by Karsten in 1881. During the past hundred years many taxonomists were of different opinions on the concept of this genus. In this paper the. new generic concept of the genus is adopted. The generic characteristics are as follows: fresh fruitbody soft, separable and succulent; context fleshy, homogenous, after drying fragile, easily powdery and caseous. Hyphal system monomitic or dimitic. If dimitic it consists of generative hyphae and binding or skeletal hyphae. The hyphal system mentioned here is only included in the context and the tramal hyphae not treated. The spores of each species are not treated with chemicals because they are very rare, not easily to be found in dried specimens. Almost all of the fungi classified at present to this genus are saprophytes decaying wood of dead deciduous and coniferous trees. Many of these fungi cause brown rot of wood and some ones are destroyers of the standing and down timber. In 1886 the French mycologist L. Quelet, established the genus Leptoporus. Many mycologists consider that the two genera have the same generic delimitation. According to the studies of Donk (1960) it is better to use Tyromyces with Polyporus chioneus Fr. as the type species based on the rule of priority of nomenclature. From China Teng (1964) reported 18 species and Tai (1979) recorded 24 species. Among them the hyphal system of certain species is trimitic and, therefore should be excluded from the genus. With this new generic concept of Tyromyces, the species of the genus from China have been restudied. In the present paper 22 species have been identified, of which 6 are new records and 3 as new species (Tyromyces armeniacus, Tyromyces imbricatus, Tyromyces tibeticus). Each new species is fully described in Latin and Chinese. All the materials are deposited in the Mycological Herbarium of Institute of Microbiology, Academia Sinica, Beijing. | 作者通过鉴定大量标本和对已定名标本的研究,根据菌肉菌丝体的类型及子实体的形态特征,重新修订了中国干酪菌属。该属共有22个种,其中包括3个新种(Tyromyces armeniacus Zhao et Zhang, T.imbricatus Zhao et Zhang,T.tibeticus Zhao et Zhang)和6个新记录[T.duracinus(Pat.)Murr.,T.delectans(Peck)Lowe,T.pelliculosus(Berk.)Cunn.,T. carpatorossieus(Pilat ex Pilat) Bond., T.semisupinus(Berk. & Curt.) Murr.,T. trichrous(Berk.& Curt.)Lowe]。 | The near field strong ground velocity records from Jan.7,1984 Luanxain earthquake (Ms = 5.0) have been modeled by generalized reflection-transmission coefficient matrix and discrete wavenumber method . In order to obtain good results, we redetermined the epicenter and hypocentral depth using generalized ray method by the trial and error procoss.According to recording site conditions,we choose different thin-layer parameters such that the strong ground velocity records which contain much information from medium... The near field strong ground velocity records from Jan.7,1984 Luanxain earthquake (Ms = 5.0) have been modeled by generalized reflection-transmission coefficient matrix and discrete wavenumber method . In order to obtain good results, we redetermined the epicenter and hypocentral depth using generalized ray method by the trial and error procoss.According to recording site conditions,we choose different thin-layer parameters such that the strong ground velocity records which contain much information from medium and source can be modeled successfully.The results suggest that the faulting process of Luanxian earthquake is quite heterogeneous.The rupture velocity is about te 0.8 to 0.9 times of the local S-wave velocity.The length and. width is 2.4 and 2.0 km, respectively. The total moment is abont 1.2 × 1018N·cm. By comparing the synthetics with the observed data,we investigated some important information from recording site conditions, shallow medium and the source, | 1984年1月7日,在唐山以东的滦县附近发生了一次Ms=5.0的地震,这是自1976年唐山大地震后在唐山地区发生的又一次较大的中强地震。本文采用广义反射、透射系数矩阵和离散波数方法,对这次地震的近场记录进行了理论模拟。模拟过程主要包括:1.对资料的分析和处理;2.利用广义射线方法,对近场记录的P波和S波到时差进行拟合对比,由此重新修订了震中位置并给出这次地震的震源机制解;3.根据爆炸测深资料及其它有关资料,确定了模拟近场地震记录所需的地壳结构模型;4.采用试错法,选取了一个具有非均匀位错分布的断层模型来拟合近场地震记录,经反复实验,最后得到了滦县地震近场记录的拟合结果。 拟合结果表明,这次地震的破裂过程可用一个非均匀的断层破裂来表示,断层长2.4km,地震矩为1.2×10~(18)N·cm。通过理论地震图与观测资料的分析对比,得到了有关地震波引起的场地共振现象以及局部地区可能存在明显各向异性介质的重要信息。另外,近场地震记录的拟合结果还表明,地表薄层参数的确定在拟合过程中起着重要作用。 | This paper deals with the taxonomic position of Eofletcheria minima Lin et Chow.According to its characters,the author refer it to Rhodophyta rather than to Anthozoa andcall it Pseudoeofletcheria minima(Lin et Chow),comb.nov..In the meantime,the author consider that the quality of appreciation of organic fossil ta-xonomy has important influence on the quality of the study.of paleoecology.As the same,the study of paleoecology can promote to rethink and determine the classification of someorganic fossils. | 本文对 Eofletcheria minima Lin et Chow 分类位置重新修订,把该生物以动物界珊瑚动物门类中转移到植物界红藻门类里,并定名为 pseudoeofletcheria minima(Lin et Chow)Comb.nov.;同时认为生物化石分类的鉴定质量,对古生态的研究程度所做出的质量有重要的影响,同样古生态学的研究亦有助于重新去思索和确定一些生物化石的分类归属位置。 | | | | << 更多相关文摘 |
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