【摘要】：介形類(或介形蟲)是節(jié)肢動物門甲殼綱的一個亞綱,自早奧陶世一直繁盛至今,分布于全球自然界的各類水體當(dāng)中。本文基于西準(zhǔn)噶爾和華南地區(qū)晚泥盆-早石炭世7條剖面、816件樣品、15000余枚介形類殼體,對介形類的生物地層、古生態(tài)、生物古地理、個體發(fā)育和演化及其對晚泥盆世弗拉階-法門階(F-F)之交事件的響應(yīng)等方面進(jìn)行了綜合研究。鑒定出晚泥盆世-早石炭世介形類59屬145種,包括1新屬和10新種;建立洪古勒楞組介形類2帶2亞帶;建立了活動板塊邊緣島弧區(qū)介形類三類生態(tài)組合。討論了介形類對晚泥盆世F-F之交古海洋環(huán)境變化的響應(yīng):底棲介形類受到事件影響的程度隨著水深加大而逐步降低;嚴(yán)重缺氧和快速的溫度波動會導(dǎo)致底棲介形類豐度、分異度降低�？偨Y(jié)了古生代速足介目Cribroconcha屬兩條演化譜系,其總體模式是由不具刺到具刺演變;該屬在發(fā)展演化過程中具有生態(tài)變遷特點(diǎn)。建立了全球晚泥盆世弗拉期和法門期底棲介形類數(shù)據(jù)庫,運(yùn)用定量生物學(xué)方法將弗拉期介形類劃分為四個生物地理單元,法門期介形類劃分為五個生物地理單元;影響弗拉期生物古地理分區(qū)的首要因素是氣候分帶,而法門期生物古地理分區(qū)的主控因素是板塊運(yùn)動引起的地理格局調(diào)整。該研究填補(bǔ)了西準(zhǔn)噶爾晚古生代介形類研究的空白,豐富了華南地區(qū)古生物資料,對古生代介形類的古生態(tài)、生物古地理、譜系演化及晚泥盆世F-F事件的研究提供了新材料、新認(rèn)識和新思路。
[Abstract]:The ostracoda (or ostracoda) is a subclass of Arthropoda crustacea, which has flourished since the early Ordovician and has been distributed in all kinds of water bodies in the world. Based on 7 sections of late Devonian and early Carboniferous in West Junggar and South China, there are more than 15000 ostracods in 7 sections of late Devonian and early Carboniferous. The biostratigraphy, paleoecology and biopaleogeography of ostracods are analyzed. The ontogeny and evolution and its response to the F-F intersecting events in the late Devonian have been comprehensively studied. There are 59 genera and 145 species of late Devonian and early Carboniferous ostracods, including 1 new genus and 10 new species, 2 subzones of Ostracodes and 2 subzones of the Hongguoleleng formation, and 3 types of ostracostra and 3 ecological assemblages in the island arc zone of the active plate margin. The response of ostracods to the late Devonian F-F intersecting paleo-marine environment is discussed: the degree of benthic ostracods affected by events decreases gradually with the increase of water depth, and severe hypoxia and rapid temperature fluctuations lead to benthic ostracod abundance. The degree of differentiation decreases. In this paper, two evolutionary lineages of Cribroconcha genus in Paleozoic are summarized. Its general pattern is from non-spiny to spiny, and the genus has the characteristics of ecological change in the course of development and evolution. The global late Devonian benthic ostracods databases were established. The Fla ostracods were divided into four biogeographic units and the Famen ostracods were divided into five biogeographic units by quantitative biological method. Climatic zonation is the primary factor affecting biogeogeographic zoning in Fla period, while the main controlling factor of biogeogeographic zoning in Famen period is the adjustment of geographical pattern caused by plate movement. This study fills up the blank in the study of late Paleozoic ostracods in West Junggar, enriches the paleontological data in South China, and provides new materials for the study of paleoecology, biogeography, lineage evolution and F-F events of late Devonian in the Paleozoic. New understanding and new ideas.
【學(xué)位授予單位】：中國地質(zhì)大學(xué)
【學(xué)位級別】：博士
【學(xué)位授予年份】：2017
【分類號】：Q915
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本文編號：2191709