IDENTIFICATION KEY

 

Tetra/bisporangial conceptacles arranged in sori: Family Sporolithaceae (1)

Tetra/bisporangial conceptacles not arranged in sori: Family Corallinaceae (2)

 

(1) Family SPOROLITHACEAE

(1a) Tetra/bisporangial conceptacles 110-130 Ám high and arise from a basal layer of elongated cells: Sporolithon sp. 1

(1b) Tetra/bisporangial conceptacles 60-70 Ám high and do not arise from a basal layer of elongated cells: Sporolithon sp. 2

 

(2) Family CORALLINACEAE

(2a) Cells of contiguous filaments connected by cell fusions; tetra/bisporangial conceptacles uniporate: Subfamily Mastophoroideae (3)

(2b) Cells of contiguous filaments connected by cell fusions; tetra/bisporangial conceptacles multiporate: Subfamily Melobesioideae (4)

 

(3) Subfamily MASTOPHOROIDEAE

(3a) Thallus dimerous with palisade cells, postigenous filaments only around conceptacles: Lithoporella melobesioides

(3b) Thallus dimerous, tetra/bisporangial conceptacle diameter 260-360 Ám: Spongites sp. 1

(3c) Thallus monomerous and non-coaxial, tetra/bisporangial conceptacle diameter 500-550 Ám: Spongites sp. 2

(3d) Thallus monomerous, core filaments coaxial: Neogoniolithon sp.

 

(4) Subfamily MELOBESIOIDEAE

(4a) Vegetative initials as short or shorter than underlying cells, conceptacles nearly completely raised above thallus surface, conceptacle size 210-460 Ám x 100-160 Ám: Phymatolithon sp.

(4b) Conceptacles usually raised one half of their height above thallus surface, conceptacle size 350-600 Ám x 170-200 Ám: Meleobesioideae gen. et spec. indet.

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