TAXONOMY AND BIOSTRATIGRAPHY OF THE FOSSIL MARINE DIATOM RESTING SPORE GENERA DICLADIA EHRENBERG, MONOCLADIA SUTO AND SYNDENDRIUM EHRENBERG IN THE NORTH PACIFIC AND NORWEGIAN SEA
TAXONOMY AND BIOSTRATIGRAPHY OF THE FOSSIL MARINE DIATOM RESTING SPORE GENERA DICLADIA EHRENBERG, MONOCLADIA SUTO AND SYNDENDRIUM EHRENBERG IN THE NORTH PACIFIC AND NORWEGIAN SEA
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DOI：
10.1080/0269249x.2005.9705642
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发表时间：
2005-11
期刊：
影响因子：
1.8
通讯作者：
I. Suto
中科院分区：
文献类型：
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作者：
I. Suto
本文讨论化石海洋硅藻休眠孢子属Dicladia Escherberg、Monocladia Suto和Syndendrium Escherberg的分类和生物地层。这三个属可能是角毛藻和角毛藻相关属的化石休眠孢子，其特征是在其阀上的二歧分枝过程。通过检查来自DSDP站点436、438（西北太平洋）和338（挪威海）以及纽波特海滩剖面（加州）的样品，对它们进行了研究。Dicladia属的特征是具有一个上壳，上壳有两个圆锥形隆起，并包括三种：D. capreola Escherberg、黑腹叶蝉D. mitra Bailey和D.日本矮牵牛该属在新近纪出现。单枝藻属（Monocladia）有4个种，其中包括2个新种：单枝藻M. humilis Suto，M.阿尔塔Suto，M. perizoma sp. nov.，和M. norvegica sp. nov.该属的分布仅限于中新世。Monocladia与Dicladia的不同之处在于只有一个突起和一个透明的分枝。合枝属（Syndendrium）有7个种，其中包括5个新种：S. akiapiusSuto，S.迪亚德马Escherberg，S. medusae sp. nov.，S.金龟子属新种，S. rugosum sp. nov.，S. altantemna sp. nov.，和S. nov.该属从Oligecene早期到现代出现。本属的特徴是两个或多个透明的分枝，从上壳的中央部分出现。7新种M. perizoma，M. norvegica、S. medusae、小水母S. scarabaeum、金龟子S. rugosum，S. altantemna和S.本文描述了几种常见的植物。有些物种的出现范围较短，具有特定的特征，易于识别，它们可能在生物地层学上有用。
The taxonomy and biostratigraphy of the fossil marine diatom resting spore genera Dicladia Ehrenberg, Monocladia Suto and Syndendrium Ehrenberg are discussed. The three genera are probably the fossil resting spores of Chaetoceros and Chaetoceros-related genera, and are characterized by dichotomous branching processes on their valves. They were studied by examining samples from DSDP Sites 436, 438 (northwest Pacific) and 338 (Norwegian Sea) and the Newport Beach Section (California). The genus Dicladia is characterized by having an epivalve with two conical elevations, and includes three species: D. capreola Ehrenberg, D. mitra Bailey and D. japonica Pantocsek. The genus occurs in the Neogene. The genus Monocladia possesses four species including two new species: M. humilis Suto, M alta Suto, M. perizoma sp. nov., and M. norvegica sp. nov. The occurrence of this genus is restricted to the Miocene. Monocladia differs from Dicladia by having only one elevation and a single hyaline, branching process on the epivalve. The genus Syndendrium holds seven species including five new species: S. akibae Suto, S. diadema Ehrenberg, S. medusae sp. nov., S. scarabaeum sp. nov., S. rugosum sp. nov., S. altantemna sp. nov., and S. humiliantemna sp. nov. This genus occurs from the early Oligecene to the Recent. This genus is characterized by two or more hyaline, branching processes that arise from the central portion of the epivalve. Seven new species M. perizoma, M. norvegica, S. medusae, S. scarabaeum, S. rugosum, S. altantemna and S. humiliantenma are described in this paper. Some species have short-ranging occurrences and specific characteristics allowing for easy identification, and they may be biostratigraphically useful.