Abstract

Three new records in the order Trichiales (Myxomycetes) are described and illustrated by light and scanning electron microscopy. Arcyria margino-undulata is characterized by a long- stalked globose sporangia and a calyculus marked by undulate margins. Hemitrichia velutina is distinctive in having areolate, globose sporangia and long flexuose capillitial threads bearing long spine at its rounded free ends. Perichaena vermicularis var. microsperma differs from the variety vermicularis in having smaller spores. Specimens of the latter two were obtained from moist-chamber cultures, while specimens of A. margino-undulata were either obtained from moist chamber or collected directly from fields.

中文摘要

本文描述三個團毛黏菌目的成員，並以光學顯微鏡和掃描式電子顯微鏡的觀察來圖示。其中波狀杯緣團網黏菌 (Arcyria margino-undulata Nann.-Brem. and Y. Yamam.) 其子實體由野外採集和濕室培養所得，孢子囊具有以下特徵：長柄、圓頭、杯狀邊緣。鵝絨半團毛黏菌 (Hemitrichia velutina Nann.-Brem. & Y. Yamam.) 是採用濕室培養得到，特徵在於其球形的孢子囊，具有網格狀的外表，而細毛體彎曲和游離端圓鈍，且端頂具有一長刺。蟲蓋碗黏菌小孢變種 (Perichaena vermicularis var. microsperma Y. Yamam. & Nann.-Brem.) 是採用濕室培養得到，其和本種 (Perichaena vermicularis) 的差異，在於其孢子較小。

Keyword: Arcyria, Hemitrichia, Perichaena, Myxomycetes, Slime molds, Taiwan, Trichiales.