Amphiroa is a genus of thalloid alga comprising 111 species. Specimens can reach around 30 cm in size. The thalli take a crustose form; dichotomous branches are formed. The organisms possess secondary pit connection

Pit connection

In Plant anatomy, a pit connection is a hole in the septum between two algal cells, and is found only in the red algae - specifically, all orders except the Porphyridiales and haploid Bangiales. They are often stoppered with "pit plugs". They are in fact neither pits, nor connections, yet the term...

s. Amphiroa reproduces by means of conceptacle

Conceptacle

Conceptacles are specialised cavities of marine and freshwater algae that contain the reproductive organs. They are situated in the receptacle and open by a small ostiole. Conceptacles are present in Corallinaceae, and Hildenbrandiales, as well as the brown Fucales. In the Fucales there is no...

s; it produces tetraspores. Its pore canals are lined with parallel filaments; the morphology of the pore canal is a key trait used to delineate species within the genus.

Species

The valid species currently considered to belong to this genus are:

• A. amaethistina
• A. americana
• A. amethistina
• A. amethystea
• A. anastomosans
• A. anceps
• A. anchiverricosa
• A. angustivirgata
• A. annobonensis
• A. annulata
• A. beauvoisii
• A. belvisii
• A. boviesii
• A. brasiliana
• A. breviarticulata
• A. caloclada
• A. canaliculata
• A. capensis
• A. carpiana
• A. cladoniiformis
• A. compressa
• A. continua
• A. contracta
• A. crassa
• A. cretacea
• A. crustiformis
• A. cryptarthrodia
• A. cumingii
• A. currae
• A. delicatula
• A. dilatata
• A. dimorpha
• A. droogeri
• A. drouetii
• A. dubia
• A. echigoensis
• A. elegans
• A. ellenbergeri
• A. elliottii
• A. ephedracea
• A. ephedraea
• A. firma
• A. foliacea
• A. fortis
• A. fragilissima
• A. fragillima
• A. franciscana
• A. galapagensis
• A. galaxauroides
• A. galerita
• A. gallioides
• A. godeffroyi
• A. gracilis
• A. guatemalense
• A. hancockii
• A. hanzawai
• A. heterarthra
• A. howensis
• A. involuta
• A. iraquensis
• A. itonoi
• A. johansenii
• A. kaskaella
• A. kuetzingiana
• A. lemoineae
• A. linearis
• A. lucida
• A. magdalenensis
• A. mattiroliana
• A. maxima
• A. medians
• A. mexicana
• A. minutissima
• A. misakiensis
• A. monoderma
• A. nobilis
• A. nodularia
• A. nodulosa
• A. oceanica
• A. pacifica
• A. palmata
• A. peninsularis
• A. peruana
• A. polymorpha
• A. polyzona
• A. prerigida
• A. propria
• A. pusilla
• A. pustulata
• A. regularis
• A. rigens
• A. rigida
• A. scutiloba
• A. setacea
• A. shimodaensis
• A. shirahamaensis
• A. spectabilis
• A. spina
• A. subcylindrica
• A. tani
• A. tasmanica
• A. taylorii
• A. toddae
• A. tribulus
• A. undulata
• A. ungulata
• A. valonioides
• A. vanbosseae
• A. ventricosa
• A. yendoi
• A. zonata

External links

• Images of Amphiroa at Algaebase
  AlgaeBase
  AlgaeBase is a global species database of information on all groups of algae, as well as one group of flowering plants, the sea-grasses.AlgaeBase evolved from Michael Guiry's seaweed website, and has grown into a database of algae from throughout the world, and in freshwater, terrestrial, and...