Abstract

In order to elucidate the palaeoecology of the lower Erhchiu Formation, the early Pliocene, Sanhsia, northern Taiwan, an effort has been made to analyse the pollen fossil assemblage and reconstruct the depositional environment of that area. In this pollen analysis, 65.7 per cent angiosperms pollen, 17.2 per cent gymnosperms pollen, 17.1 per cent bryophytous and pteridophytic spores were obtained. In this pollen assemblage, four new genera, eight new species and five new records have been found. In the eight new species, except the Retitricolpitrites taiwanensis and Malvacearumpollis majus which cannot be confirmed, the six new species are herbaceous angiosperm pollen.

中文摘要

本文著重於分析古植物社會之組成，而以沈積環境之研究，來討論上新世早期三峽地區二 層底部之古生態環境，將以另文報告。分析本地區之孢粉化石植物群，發現此孢粉化石組合，被子植物化石花粉佔65.7％ ，裸子植物化石花粉佔17.2％，苔蘚與蕨類植物化石孢子佔17.1％。於此孢粉組合中，發現了四個新屬，八個新種及五個新紀錄種。新發現之八個新種中，除了台灣網面三溝粉及大型錦葵粉不能確定其性狀外，其餘六種為具草本性狀植物科群之花粉化石。