منابع مشابه
Bioerosion caused by the sea urchin Diadema Mexicanum (Echinodermata: Echinoidea) at Bahías de Huatulco, Western Mexico.
Mexican Pacific sea urchin studies have been focused mainly on species distribution, ecology and fisheries. Reef degradation by sea urchin bioerosion has not been studied previously en these reefs. We investigate the importance of Diadema mexicanum as a bioerosive agent of coral carbonate at Bahias de Huatulco, and the relative magnitude of coral accretion and bioerosion. At each of five locali...
متن کاملExtinct and extant sand dollars (Clypeasteroida: Echinoidea) from Uruguay.
We summarize information concerning Recent and Pleistocene-Holocene Uruguayan sand dollars (Mellitidae), as well as Miocene taxa (Monophorasteridae). Recent and Pleistocene-Holocene species (Encope emarginata, Mellita quinquiesperforata, and Leodia sexisperforata) are at their southernmost limits of distribution, with only E. emarginata recorded further south than Uruguay. Lower temperatures to...
متن کاملPolitics, Kinship, and Ecology in Southeast Persia
The Iranian plateau is an ideal area for investigating the relationship be? tween ecological and sociological factors because of its stark aridity, on the one hand, and its historical role as a meeting place of ethnic and cultural movements on the other. The part of the plateau which forms the southeast corner of Persia is particularly interesting from this point of view. Over an area of some 2...
متن کاملFossil Sand Dollars (echinoidea: Clypeasteroida) from the Southern Brazilian Coast
Quaternary sediments along the southernmost portion of the Brazilian coast are rich in fossil remains of various terrestrial and marine organisms. This paper presents a description of fossil irregular clypeasteroid echinoids found in this area, with observations on their taphonomy. The identified taxa are Encope emarginata (Leske) and Mellita quinquiesperforata (Leske), although the latter is v...
متن کاملOn Cholera in Persia, 1866-68
have occasionally added information obtained from other authentic sources, so as to render the text clear and connected throughout. I believe the outbreak to have been a link of the widespread epidemic of 1865, which penetrated into that kingdom by way of Bagdad, on the return of the pilgrims from Mecca, as related in the report of the International Cholera Conference of 1866, which treats of t...
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ژورنال
عنوان ژورنال: Geological Magazine
سال: 1920
ISSN: 0016-7568,1469-5081
DOI: 10.1017/s0016756800106934