The number of valid species in the genus Echinometra (Echinodermata, Echinoidea) and their associated identification keys have been debated in the scientific literature for more than 180 years. As the phylogeny and dispersal patterns of these species have been widely used as a prominent model for marine speciation, new insights into their taxonomy have the potential to deepen our understanding ...

Significant differences in adult morphology, ecology, molecular phylogeny, mtDNA and loci coding for gamete recognition molecules have been combined to map the boundaries of four closely related Echinometra species occur abundantly all over the tropical Pacific. These species have recently been designated as Echinometra A, B, C and D [1– 11]. Consequently, mitochondrial DNA sequence data show t...

The rich species diversity of the marine Indo-West Pacific (IWP) has been explained largely on the basis of historical observation of large-scale diversity gradients. Careful study of divergence among closely related species can reveal important new information about the pace and mechanisms of their formation, and can illuminate the genesis of biogeographic patterns. Young species inhabiting th...

This study explores both the direct effects of ocean acidification on early embryology and the indirect effects of a low pH environment on the embryos ability to expel toxins through membrane-bound transporters. This work was done on three different species of sea urchins, Strongylocentrotus Purpuratus, Tripneustes gratilla, and Echinometra mathaei, each collected at a different location (Monte...

Bulu Babi (Echinometra mathaei) atau landak laut dalam Bahasa Inggris disebut sea urchin memiliki kandungan senyawa bioaktif yang bersifat toksik. Penelitian ini bertujuan untuk menganalisis metabolit sekunder pada ekstrak etanol 70% Echinometra mathaei dengan menggunakan analisis FTIR Tahapan penelitian meliputi determinasi, ekstraksi, uji organoleptis, makroskopis, dan FTIR. Determinasi sampe...

The massive die-off of the long-spined sea urchin, Diadema antillarum, a significant reef grazer, in the mid 1980s was followed by phase shifts from coral dominated to macroalgae dominated reefs in the Caribbean. While Diadema populations have recovered in some reefs with concomitant increases in coral cover, the additional threat of increasing temperatures due to global climate change has not ...