Pseudoleskeella serpentinensis

Region S (position 289) has a shared substitution (G versus T) in four species, three members of the 07 clade (Heterocladium dimorphum, H. procurrens and Pseudoleskeella serpentinensis) and Leptodictyum riparium (09). 

L3) Pseudoleskeella, including Leskeella but not including Pseudoleskeella serpentinensis P. Wilson and Norris (four species). 

Finally, Pseudoleskeella serpentinensis was found within this clade in all analyses. This species differs from other Pseudoleskeella species in being bigger and having thick-walled cells arranged in more or less firm oblique rows, reminiscent of Neckeraceae. The leaf margin of P. serpentinensis is also remotely but quite prominently serrate, a character never found in other species of Pseudoleskeella, but characteristic of both Neckeraceae and Heterocladium. Thus, the placement of P. serpentinensis in Heterocladium or near it seems more likely than in Pseudoleskeella. 

Pseudoleskeella serpentinensis P. S. Wilson D. H. Norris Pseudoleskeella tectorum (Funck ex Brid.) Kindb. ex Broth. Pseudoleskeopsis imbricata (Hook. Wilson) Thdr. 

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