Dictyotales Dictyotaceae

Distribution

Dictyopteris serrata (Areschoug) Hyot

Distribution

Dictyopteris serrata (Areschoug) Hyot

Thallus form and type

Substratum

Occurrence

Season

Abundance

Description

Leafy and blade type

Intertidal rocks, coralline substrata

Subtidal

July-November

Scanty

Plants light to dark brown in colour, 22 cm tall, attached by rhizoidal holdfast, dichotomously branched; fronds 3 - 4 cm broad with prominent midrib, wings and lateral veins (Fig. a); lateral veins alternately arising from the midrib, margins with prominent regularly dentate teeth (Fig. b); paraphyses and antheridial sori scattered in the wings; thallus 20 celled thick in midrib region and 4 - 5 cells thick at the margin (Fig. c).

Dictyotales, Dictyotaceae

Distribution

Dictyota bartayresiana Lamouroux

Distribution

Dictyota bartayresiana Lamouroux

Thallus form and type : Ramiform and foliose or ribbon shaped Substratum : Intertidal rocks, coralline stones

Occurrence : Mid littoral and lower littoral areas

Season : November-April

Abundance : Moderate

Description : Plants erect, branched, dark brown in colour, about 10 cm tall (Fig. a, b), branches are strap-like, alternatively to dichotomously divided, branched at narrow angles, gradually decreasing in width to the pointed apex, aculeate tips, blades have spines on their surface, blades 4 - 5 mm wide with a dotted appearance, blade surface rough. Thallus is 3 cell thick (Fig. c). It mostly grows in tide pools and some times as epiphyte on larger brown algae.

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