Dictyotales Dictyotaceae

Stoechospermum marginatum (C. Agardh) Kützing

Distribution

Adri: N 20° 57.58'; E 70° 16.76' Kotda: N 20° 42.38'; E 70° 52.17' Okha: N 22° 28.54'; E 69° 04.39' Porbandar: N 21° 38.24'; E 69° 35.81' Shivrajpur: N 22° 19.87'; E 68° 56.95' Veraval: N 20° 54.87'; E 70° 20.83'

Stoechospermum marginatum (C. Agardh) Kützing

Thallus form and type

Substratum

Occurrence

Season

Abundance

Description

Frondose and ribbon type Intertidal rocks

Infra littoral fringe and sub littoral zone, tide pools

November-April

Dominant

Plants yellowish brown in colour, up to 20 cm in height, erect, growing as tufts; thallus ribbon shaped, dichotomously divided, attached by rhizoidal holdfast (Figs. a, b); margins of the branches entire with involute apices; thallus with 4 - 5 celled medulla at the centre and one-celled thick, pigmented peripheral layers; hairs found in large groups, scattered over the surface of the thallus, reproductive bodies occurring as marginal sori.

Scytosiphonales, Scytosiphonaceae

Distribution

Okha: N 22° 28.50'; E 69° 04.30' Shivrajpur: N 22° 19.87'; E 68° 56.95' Veraval: N 20° 54.87'; E 70° 20.83'

Colpomenia sinuosa (Martens ex Roth) Derbes & Solier

Distribution

Okha: N 22° 28.50'; E 69° 04.30' Shivrajpur: N 22° 19.87'; E 68° 56.95' Veraval: N 20° 54.87'; E 70° 20.83'

Colpomenia sinuosa (Martens ex Roth) Derbes & Solier

Thallus form and type

Substratum

Occurrence

Season

Abundance

Description

Globular or lobed vesicles

Intertidal rocks, epiphytic on other large algae

Lower mid littoral zone and infra littoral fringe, wave exposed rocks

November-April

Dominant

Plants yellow brown in colour, 5 - 10 cm or more in diameter, globular, hollow, forming air-filled and irregularly lobed vesicles with corrugated surface (Figs. a, b); thallus composed of a pigmented layer of epidermis, 5 - 6 layers of large colourless cells below the epidermis, plurilocular sori on the epidermis, associated with paraphyses and hairs.

Scytosiphonales, Scytosiphonaceae

Hydroclathrus clathratus (C. Agardh) Howe

Distribution

Dwarka: N 22° 14.61'; E 68° 57.28' Okha: N 22° 28.50'; E 69° 04.30' Porbandar: N 21° 38.24'; E 69° 35.81' Shivrajpur: N 22° 19.87'; E 68° 56.95' Veraval: N 20° 54.87'; E 70° 20.83' Vervala: N 22° 16.87'; E 69° 56.75'

Hydroclathrus clathratus (C. Agardh) Howe

Thallus form and type

Substratum

Occurrence

Season

Abundance

Description

Vesicular and net like masses Intertidal rocks, coralline stones

Lower mid littoral zone and infra littoral fringe, wave exposed rocks

November-April

Dominant

Plants yellowish to dark brown in colour, up to 12 cm long, 4 - 8 cm broad, vesicular or irregularly ovate, un-perforated when young, hollow and perforated as net like structures (Figs. a, b) when mature; perforations variable in size, rounded, margins around perforations involute; thallus composed of an epidermal layer and a zone of colourless cells below the epidermis; plurilocular sori scattered all over the surface of the thalli, hairs grouped in shallow depression. It is used as food and fertilizer in some countries

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