Polysiphonia atlantica | |
---|---|
Scientific classification | |
(unranked): | Archaeplastida |
Division: | Rhodophyta |
Class: | Florideophyceae |
Order: | Ceramiales |
Family: | Rhodomelaceae |
Genus: | Polysiphonia |
Species: | P. atlantica
|
Binomial name | |
Polysiphonia atlantica Kapraun & J.N.Norris
|
Polysiphonia atlantica is a small filamentous species of red marine algae Rhodophyta. The thalli form small tufts up to 3 cm long. The axes are ecorticate consisting of axial cells surrounded by four periaxial cells. [1]
Polysiphonia atlantica is a small alga 3 cm high and dark reddish-brown in colour. It grows in tufts from prostrate axes producing numerous erect branches all growing to the similar lengths. The axial cells are surrounded by 4 periaxial cells which are elongate to the same length as the axial cells which are ecorticate. Attached by rhizoids produced by the periaxial cells. [1]
The life history is a sequence of three phases: gametangial, carposporangial and tetrasporangial. [2] The plants are dioecious with spermatangial branchlets at the apices of the branches, cystocarps are slightly urceolate. The tetrasporangia occur the branches in a straight series. [1]
Growing on rock, mussels other invertebrates or epiphytic. Between high and low water levels. [1] [3]
Records have been made from the British Isles- England, Ireland, Wales and Scotland, to Morocco, east coast of America and the Indian Ocean. [1] Most of the records from the British Isles are probably those of Polysiphonia stricta. [3]
Polysiphonia atlantica | |
---|---|
Scientific classification | |
(unranked): | Archaeplastida |
Division: | Rhodophyta |
Class: | Florideophyceae |
Order: | Ceramiales |
Family: | Rhodomelaceae |
Genus: | Polysiphonia |
Species: | P. atlantica
|
Binomial name | |
Polysiphonia atlantica Kapraun & J.N.Norris
|
Polysiphonia atlantica is a small filamentous species of red marine algae Rhodophyta. The thalli form small tufts up to 3 cm long. The axes are ecorticate consisting of axial cells surrounded by four periaxial cells. [1]
Polysiphonia atlantica is a small alga 3 cm high and dark reddish-brown in colour. It grows in tufts from prostrate axes producing numerous erect branches all growing to the similar lengths. The axial cells are surrounded by 4 periaxial cells which are elongate to the same length as the axial cells which are ecorticate. Attached by rhizoids produced by the periaxial cells. [1]
The life history is a sequence of three phases: gametangial, carposporangial and tetrasporangial. [2] The plants are dioecious with spermatangial branchlets at the apices of the branches, cystocarps are slightly urceolate. The tetrasporangia occur the branches in a straight series. [1]
Growing on rock, mussels other invertebrates or epiphytic. Between high and low water levels. [1] [3]
Records have been made from the British Isles- England, Ireland, Wales and Scotland, to Morocco, east coast of America and the Indian Ocean. [1] Most of the records from the British Isles are probably those of Polysiphonia stricta. [3]