fossil graptoloids
笔石化石
graptoloid fauna
笔石动物群
graptoloid morphology
笔石形态学
identifying graptoloids
识别笔石
graptoloid assemblages
笔石组合
ancient graptoloids
古代笔石
graptoloid diversity
笔石多样性
graptoloid evolution
笔石进化
studying graptoloids
研究笔石
graptoloid specimens
笔石标本
graptoloid species provide valuable index fossils for paleozoic stratigraphic correlation.
笔石类物种为古生代地层对比提供了有价值的标准化石。
the graptoloid fauna indicates an early ordovician age for these black shale deposits.
笔石类动物群表明这些黑色页岩沉积属于早奥陶世。
paleontologists have recently revised the graptoloid taxonomy based on new morphological studies.
古生物学家根据新的形态学研究修订了笔石类分类系统。
graptoloid assemblages are used to correlate rocks across different sedimentary basins.
笔石类化石组合被用于不同沉积盆地之间的地层对比。
the graptoloid sequence shows a gradual evolutionary pattern throughout the ordovician period.
笔石类化石序列显示了奥陶纪期间逐渐演化的模式。
detailed morphological analysis of graptoloid specimens reveals subtle taxonomic differences.
对笔石类标本的详细形态分析揭示了细微的分类学差异。
graptoloid biostratigraphy has become increasingly refined with additional fossil discoveries.
随着更多化石的发现，笔石类生物地层学变得愈发精确。
the graptoloid zonation allows precise dating of marine sedimentary rocks worldwide.
笔石类生物带划分允许对全球海相沉积岩进行精确定年。
graptoloid phylogeny suggests rapid diversification during the great ordovician biodiversification event.
笔石类系统发育研究揭示了大奥陶纪生物多样化事件期间的快速分化。
researchers have identified several new graptoloid species from ordovician strata in south china.
研究人员从华南奥陶纪地层中识别出数个新的笔石类物种。
the graptoloid fauna changed dramatically following the end-ordovician mass extinction event.
笔石类动物群在奥陶纪末期大灭绝事件后发生了剧烈变化。
graptoloid colonies exhibit distinctive thecal arrangements that aid in species identification.
笔石类群体展现出独特的杯状排列方式，有助于物种鉴定。
fossil graptoloids
笔石化石
graptoloid fauna
笔石动物群
graptoloid morphology
笔石形态学
identifying graptoloids
识别笔石
graptoloid assemblages
笔石组合
ancient graptoloids
古代笔石
graptoloid diversity
笔石多样性
graptoloid evolution
笔石进化
studying graptoloids
研究笔石
graptoloid specimens
笔石标本
graptoloid species provide valuable index fossils for paleozoic stratigraphic correlation.
笔石类物种为古生代地层对比提供了有价值的标准化石。
the graptoloid fauna indicates an early ordovician age for these black shale deposits.
笔石类动物群表明这些黑色页岩沉积属于早奥陶世。
paleontologists have recently revised the graptoloid taxonomy based on new morphological studies.
古生物学家根据新的形态学研究修订了笔石类分类系统。
graptoloid assemblages are used to correlate rocks across different sedimentary basins.
笔石类化石组合被用于不同沉积盆地之间的地层对比。
the graptoloid sequence shows a gradual evolutionary pattern throughout the ordovician period.
笔石类化石序列显示了奥陶纪期间逐渐演化的模式。
detailed morphological analysis of graptoloid specimens reveals subtle taxonomic differences.
对笔石类标本的详细形态分析揭示了细微的分类学差异。
graptoloid biostratigraphy has become increasingly refined with additional fossil discoveries.
随着更多化石的发现，笔石类生物地层学变得愈发精确。
the graptoloid zonation allows precise dating of marine sedimentary rocks worldwide.
笔石类生物带划分允许对全球海相沉积岩进行精确定年。
graptoloid phylogeny suggests rapid diversification during the great ordovician biodiversification event.
笔石类系统发育研究揭示了大奥陶纪生物多样化事件期间的快速分化。
researchers have identified several new graptoloid species from ordovician strata in south china.
研究人员从华南奥陶纪地层中识别出数个新的笔石类物种。
the graptoloid fauna changed dramatically following the end-ordovician mass extinction event.
笔石类动物群在奥陶纪末期大灭绝事件后发生了剧烈变化。
graptoloid colonies exhibit distinctive thecal arrangements that aid in species identification.
笔石类群体展现出独特的杯状排列方式，有助于物种鉴定。
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