نتایج جستجو برای: echinoids
تعداد نتایج: 253 فیلتر نتایج به سال:
Abundant Cardioichnus planus SMITH & CRIMES, 1983 have been reported for the first time from Africa. They occur in lower Miocene deep-marine deposits near Tiaret northwestern Algeria. Morphological features of trace, coupled with spatial interrelationships between and echinoids documented this area, provide evidence that endemic spatangoid Echinocardium nummuliticum PÉRON GAUTHIER, 1885 rep...
Electrophysiological studies in echinoderms are rare. In echinoids investigations have been made by Takahashi and Sandeman. The former used Diadema setosum, the latter Strongylocentrotus, Tripneustes and Toxopneustes. Takahashi gives a brief account of the electrical concomitant of the photic responses already described in detail by Millott and co-workers. Behavioural studies showed that the ra...
Echinoderm genome sequences are a corpus of useful information about a clade of animals that serve as research models in fields ranging from marine ecology to cell and developmental biology. Genomic information from echinoids has contributed to insights into the gene interactions that drive the developmental process at the molecular level. Such insights often rely heavily on genomic information...
SYNOPSIS. The spine-convergence response of sea urchins and the papula (deimal branchia) retraction response of starfish persist after removal of the central nervous system, but are blocked by scratching through the skin. They are mediated therefore by diffuse superficial conduction systems capable of limited spread—to a few centimeters. The spine response does not bend around the ends of a cut...
Information regarding the echinoids in this dataset is based on the Agassiz Trawl (AGT) and epibenthic sledge (EBS) samples collected during the British Antarctic Survey cruise JR275 on the RRS James Clark Ross in the austral summer 2012. A total of 56 (1 at the South Orkneys and 55 in the Eastern Weddell Sea) Agassiz Trawl and 18 (2 at the South Orkneys and 16 in the Eastern Weddell Sea) epibe...
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