Study of Triassic Tethyan fauna between Japan and U.S.A. -Comparative study between Japan and Pacific coast of U.S.A.

我们对日本SamBosan地体和北美外来地体中的许多双壳类和珊瑚的研究证实了特提斯关系。然而，在这里，除了只有一种珊瑚外，没有发现来自SamBosan Terrane的特提斯动物群与北美奇异地体之间的相似性。有两个省允许一些特提斯成分进入每个省，但距离不够近，不足以允许一些古地理上的相互迁徙。生物线索研究(田村)-渴望内高知谷动物群1。牛顿等人(1987)报道了来自地狱峡谷群Wlowa MTS的几个日本物种。这些结果没有被美国和日本物种的Tamuras比较研究所证实。综上所述，上三叠统双壳类中没有共存的种类。三角科与中国和日本东南亚的同类有亲缘关系。这个三角组合的特征是…的Gruenewald更多的原三角属和九州三角属(n.Gen.)另一方面，美国三角珊瑚省以近海珊瑚为特征。珊瑚研究(Stanley)a)比较一致的研究揭示了来自日本的17种珊瑚如下：b)在古生态学上几乎没有什么可说的，因为珊瑚产于石灰岩卵石和橄榄岩沉积的碎屑中。c)日本珊瑚具有很强的特提斯成分，53%的物种与特提斯的物种相同。其中四个共同出现在中国南部。有很高比例的特有物种(40%)在日本以外是未知的。动物群中有一小部分(1%)出现在蒂莫尔。d)物种是卡年和诺里安-拉埃提亚时代的混合体。大多数卡尼亚物种出现在小口和和谷地区。来自Mizukami-Goe地区的珊瑚都是诺里安-瑞安物种。e)来自美国瓦洛瓦地体的20种珊瑚产生的百分比与日本相似：55%的特提斯物种，40%的特有物种，5%的帝汶岛。然而，它与来自日本的珊瑚几乎完全不同。较少

Tethyan relationships were confirmed by our studies on many bivalves and corals from Sambosan Terrane in Japan as well as from North American exotic terranes. The affinities between Tethyan faunas from Sambosan Terrane and North American exotic terranes, however, was not found here, except for only one conspecifie coral. Two provinces allowed some Tethyan components to move into each province but not close enough to allow some emmigration each other paleogiographycally.The results are stated more precisely as following. Bioclue study (by Tamura) be-longing to the Inner Kochigatani fauna.1. Newton and others (1987) reported several Japanese species from Hells canyon formation Wallowa Mts.. These results were not confirmed by Tamuras comparative study between American and Japanese species. In conclusion no species of Upper Triassic bivalve are co-existent.2. Trigonids have affinities with these of Chinese and Japanese S. E. Asia. This Trigonids assemblage is characterized by Gruenewald, … More Prorotrigonia and Kyushutrigonia (n. gen.) On the other hand American Trigonian province is characterized by Myophori-gonia.Coral study (by Stanley)a) The comparative syoteniative study revealed the prosence of 17 species from Japan as follows.b) Little can be said on paleoecology, since the corals occur in limestone pebbles and clasts of Olistostromal deposits.c) The Japanese corals have a strong Tethyan composition 53% of the species are con-specific with those of the Tethys. Four of these cooccur in South China. There is a high percentage of endemic species (40%) which are not known outside Japan. A small component of the fauna (1%) occurs in Timor.d) Species are a mixture of Carnian and Norian-Rhaetian ages. Most of the Carnian species occur at the Koguchi and Wasabidani localities. Coral from the Mizukami-goe locality is all Norian-Rhaetian species.e) Twenty coral species from the American Wallowa terrane produce percentages similar to Japan : 55% Tethyan species, 40% endemic, and 5% Timor. However there is nearly complete dissimilarity with corals from Japan. Less