Rhodachlya madagascarensis gen. et sp. nov.: a distinct acrochaetioid represents a new order and family (Rhodachlyales ord. Nov., Rhodachlyaceae fam. Nov.) of the Florideophyceae (Rhodophyta)

摘要: Abstract A filamentous ‘acrochaetioid’ red algal epiphyte on Posidonia from Madagascar was isolated into culture. It reproduces solely by monosporangia and the spherical spores have gliding motility that differs amoeboid spore seen with time-lapse video microscopy in most Acrochaetiales Colaconematales. Electron reveals a peripheral encircling thylakoid is absent chloroplast, Golgi bodies are associated mitochondria, pit plugs platelike outer inner caps lack cap membrane. Low-molecular-weight carbohydrates floridoside trehalose. Molecular evidence (small subunit, large subunit EF2 sequences) resolved this taxon as completely novel lineage of Nemaliophycidae, it here described Rhodachlya madagascarensis J.A. West et al., gen. sp. nov. In light unusual combination ultrastructural features affinity to any currently recognized families orders molecular analyses, alga for...