Related Experiment Video
Updated: Jun 20, 2026

Characterization of Calcification Events Using Live Optical and Electron Microscopy Techniques in a Marine Tubeworm
Published on: February 28, 2017
Evolutionary relationships between aquatic anamorphs and teleomorphs: Tricladium and Varicosporium
Jinx Campbell1, Ludmila Marvanová, Vladislav Gulis
1Department of Coastal Sciences, University of Southern Mississippi, Ocean Springs, 39564, USA. jinx.campbell@usm.edu
Abstract:
Tricladium, with 21 accepted species, is the largest genus of aquatic hyphomycetes. It encompasses species with dematiaceous as well as mucedinaceous colonies. Conidiogenesis is thalloblastic; conidiogenous cells proliferate percurrently or sympodially. Conidia have typically two alternate primary lateral branches. Fontanospora and Variocladium are segregates of Tricladium, differing by conidial branching. Varicosporium comprises nine species, one not well known. Conidiogenesis is blastic or thalloblastic, conidiogenous cells proliferate sympodially or are determinate; conidia regularly produce primary and secondary branches and often fragment into part conidia. Molecular analyses on the 28S rDNA of 86 isolates, including 16 species of Tricladium, five species of Varicosporium, two species of Fontanospora and one species of Variocladium, place these hyphomycetes within Helotiales. Tricladium is polyphyletic and placed in six clades; Varicosporium is polyphyletic and placed in three clades; Fontanospora is polyphyletic within a single clade. Variocladium is placed with poor support as a sister taxon to Varicosporium giganteum, Hymenoscyphus scutula and Torrendiella eucalypti.
Related Concept Videos
Diversity of Protists III
Diversity of Protists IV
Diversity of Protists II
Diversity of Protists I
The Colonization of Land
Convergent Evolution

