Enigmatic chambered structures in Cryogenian reefs: The oldest sponge-grade organisms?
نویسندگان
چکیده
منابع مشابه
Security of Sponge structures
Sponge structure is a structure widely used in the design of cryptographic algorithms that reduces the design of the algorithms to the design of a permutation or pseudo-random function. The development of sponge-based algorithms and the selection of designs based on this structure in SHA3 and CAESAR competitions increase the need to examine its security against various types of attacks. In the ...
متن کاملModeling morphological diversity in the oldest large multicellular organisms.
The terminal Neoproterozoic Ediacaran Period (635–541 Ma) is best described as a time of change. Following the end of the last global “Snowball” glaciation and a global rise in atmospheric oxygen levels, a biotic revolution began occurring in the oceans. The fossil record of this revolution showcases the transition from microscopic single cells into large, multicellular and morphologically comp...
متن کاملCalibrating the Cryogenian.
The Neoproterozoic was an era of great environmental and biological change, but a paucity of direct and precise age constraints on strata from this time has prevented the complete integration of these records. We present four high-precision U-Pb ages for Neoproterozoic rocks in northwestern Canada that constrain large perturbations in the carbon cycle, a major diversification and depletion in t...
متن کاملPopulation structure and identify of macrofouling organisms on marine structures in the coasts of Chabahar Bay
This study has been carried out in the coast of Chabahar Bay from March, 2013 to Febuary, 2014. We sampled macrofouling organisms in three stations. Overall, 40 species of macrofouling organisms were detected in which Barnacles, sponges, Bryozoans, echinoderms, Polychaetes and Gastropods were the major groups. The majority of biomass and highest density were observed in the first half of the se...
متن کاملSponge-inhabiting barnacles on Red Sea coral reefs
In this study eight dierent species of barnacles were found within nine species of sponges from the Red Sea. This brings to 11 the number of sponge-symbiotic barnacles reported from the Red Sea, two of these are new Acasta species (not described herein) and one (A. tzetlini Kolbasov) is a new record for this sea. This number is much higher than that of symbiotic barnacles found within sponges ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Precambrian Research
سال: 2014
ISSN: 0301-9268
DOI: 10.1016/j.precamres.2014.09.020