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Bonnemaisonia hamifera

( NYN:Krokbærar, Raudlo (Trailliella-stadiet) BOK:Krokbærer, Rødlo (Trailliella-stadiet))                  9 photos (see below for more photos)


Habit of gametophyte
Photo by: Kjersti Sjøtun
Location: Løholmane, Raunefjorden, Hordaland
Photo is showing (categorized): Gametophyte
Verified by Bergen Seaweed Group
Sampling date: 2008-05-06
Published: 2008-10-27


The species is introduced to Europe from Japan, and was first recorded in Norway in 1902. The diploid tetrasporophytic phase is now very common in Norway along the whole coast, but the haploid gametophytic phase is very rare, since tetraspores only develop under short-day conditions when temperature is 13-19 oC. The gametophytic thallus is up to 20 cm, branched, and some branches are modified to characteristic hooks.




Hook branches of gametophyte
Photo by: Kjersti Sjøtun
Location: Løholmane, Raunefjorden, Hordaland
Photo is showing (categorized): Branching pattern, Gametophyte, Sporophyte
Verified by Bergen Seaweed Group
Sampling date: 2008-05-06
Published: 2008-10-27

Small branch showing branching pattern and characteristic hook branches of the gametophyte




Habit of sporophyte
Photo by: Kjersti Sjøtun
Location: Espegrend, Raunefjorden
Verified by Bergen Seaweed Group
Sampling date: 2008-11-25
Published: 2008-12-01

Sporophytes growing epiphytically on Cladophora rupestris

The sporophytic phase is very common in Norway. The densely branched thalli are up to 5 cm, and the axes are uniseriate and irregularly branched. It has characteristic small gland cells in the junction between cells.




Branching pattern of sporophyte
Photo by: Kjersti Sjøtun
Location: Espegrend, Raunefjorden
Photo is showing (categorized): Cell row, Branching pattern, Sporophyte
Verified by Bergen Seaweed Group
Sampling date: 2008-11-25
Published: 2008-12-01

Uniseriate structure and irregular branching




Gland cells of sporophyte
Photo by: Kjersti Sjøtun
Location: Espegrend, Raunefjorden
Photo is showing (categorized): Cells
Verified by Bergen Seaweed Group
Sampling date: 2008-11-25
Published: 2008-12-01

Characteristic gland cells are seen in the junction between cells




Male gametophyte bearing spermatangial clusters in June
Photo by: Vivian Husa
Location: Huglo, Hardangerfjorden, Hordaland
Photo is showing (categorized): Gametophyte, Reproductive structure
Verified by Network members
Sampling date: 2009-06-28
Published: 2012-04-17


Spermatangia are formed in elongate, clavate clusters of 1-5 mm length, replacing the shorter lateral branch of a pair.




Spermatangial cluster
Photo by: Vivian Husa
Location: Huglo, Hardangerfjorden, Hordaland
Photo is showing (categorized): Reproductive structure
Sampling date: 2009-06-28
Published: 2012-04-17





Female gametophyte developing cystocarps
Photo by: Vivian Husa
Location: Stora Karlsøy, Austevoll, Hordaland
Photo is showing (categorized): Cystocarp, Gametophyte, Reproductive structure
Verified by Network members
Sampling date: 2009-04-17
Published: 2012-04-17





Cystocarp
Photo by: Vivian Husa
Location: Stora Karlsøy, Austevoll, Hordaland
Photo is showing (categorized): Cystocarp
Verified by Network members
Sampling date: 2009-04-17
Published: 2012-04-17




 

     

     

     

     

     

     

     

     

     

     

     

     

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