Dasya ulhasii   Sonali U. Jadiye & P.S.N. Rao  (Algae)
Organism information awaits expert curation
Taxonomy
Kingdom:Plantae
Phylum:Rhodophyta
Class: Florideophyceae
Order:Ceramiales
Family:Dasyaceae

Image copyrights: John Wiley & Sons, Ltd

Habit of the mature plant

Description
Size: Height 1.5–2.5 cm

Color: Pinkish red

Plants filiform, terete, 0.1–0.3 cm thick, attached to the exposed rocks with the help of rhizoids. Plants sympodially developed with a pentagonal axial cell surrounded by five pericentral cells alternating with the rhizoidal cell. Primary axis densely covered with pseudolaterals, directed upwards, produced in all directions on all branches, monosiphonous and dichotomously branched; alternately present; pseudolaterals straight and slightly curved inside in such a way that they lie parallel to the main axis.

A spermatangial branch develops from the branches of pseudo- laterals. Spermatangial stichidium generally grow in apical region where the pseudolaterals are more compactly present. The spermatangial stichidium is 286 µm long and 78 µm broad with a base 65 µm long. Spermatangia are compactly present in clusters with a protective cover. Tetrasporangial stichidium develop from single branch of pseudolaterals. Tetrasporangial stichidium grows in middle portion of the plant. Mature stichidium linear, lanceolate with a 200 µm long and 70 µm broad fertile portion with a stalk measuring a length about 50 µm long. Tetrasporangial stichidia contain a number of tetrasporangia in separate chamber; tetrasporangia tetrahedral divided. Cystocarps ovoid to urceolate with a long neck like stalk with a globular ovoid body having a small ostiole. Cystocarps generally develop in the basal region of the plant where we see more curvy pseudolaterals. Cystocarp is about 1–2 mm in length and 1 mm in breadth; each containing pear-shaped carpospores. These carpospores later on liberated through ostiole for germination.

Remarks: Associated with Agalothamnion and Callithamnion species in the lower intertidal region.


Synonym (s)

Common Name (s)
Economic Importance and Threats

Ecology
Habitat:  Rocky, Coastal

Biogeography


• Maharashtra, Dapoli Coast INDIA (Record: 10/2004)
• West Coast INDIA (Record: 10/2004)

Literature Source(s)
  • Jadiye, SU and Rao, PSN (2007) A new species of Dasya (Rhodophyta, Ceramiales) from the Dapoli coast of Maharashtra, India Feddes Repertorium John Wiley & Sons, Ltd 118(1-2) 60–64 Available at - http://dx.doi.org/10.1002/fedr.200611127
  • Society for the Management of European Biodiversity Data (2009) World Register of Marine Species (WoRMS) Available at - http://www.marinespecies.org

Page last updated on:2010-01-07

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