Vol. 3, Issue 1 (2018)
Revision of Isaurus sp. diversity through molecular investigation along the Saurashtra coast, Gujarat, India
Author(s): Nevya Thakkar, Kinjal Shah, Pinal Shah, Pradeep Mankodi
Abstract: Zoanthids (Order-Zoantheria, Class-Anthozoa) are benthic cnidarians which occupies the larger extent of rocky littoral zone of the tropical seas. The current paper deals with the relationship and phylogenetic confirmation of different Isaurus spp. (Anthozoa: Zoathidae) within the genera. Isaurus sp. are having, non-erect, recumbent polyp and are having tubercles on their body surface except Isaurus cliftoni. This genera is known from both the Atlantic and Indo-Pacific regions and is generally found in intertidal areas. In India, Isaurus spp. are believed to be very rare and have been reported from only a handful of locations like Veraval from a previous survey and Okha, Sutrapada and Vadodara Jhala in the present study. Total 07 specimens of the species were collected. Two species of Isaurus viz., Isaurus tuberculatus and Isaurus maculatus were observed and identified morphologically, however upon doing molecular phylogeny using separate genes like COI, 12s rRNA and 16s rRNA, Isaurus tuberculatus was the only species confirmed. The phylogenetic tree was constructed using 16s rRNA gene. Phylogenetic relationship of the confirmed species also showed 98% similarity with Isaurus tuberculatus of Japan, South Africa and Florida.