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Sand dollars diverged from the other irregular echinoids, namely the cassiduloids, during the early Jurassic, [5] with the first true sand dollar genus, Togocyamus, arising during the Paleocene. Soon after Togocyamus, more modern-looking groups emerged during the Eocene. [1] Sand dollars are small in size, averaging from 80 to 100 mm (3 to 4 ...
Heliophora orbicularis, also known as the West African Sand Dollar, is a small sand dollar in to the family Rotulidae, and the only species in the genus Heliophora. It, and other members of Rotulidae have been found in West African marine strata from the Late Miocene onward.
The tests (shells) of these sand dollars are round, flat and disc-like, typically measuring 3 inches (7.6 cm) in diameter. The growth rate for this animal is between 3.5 to 6 mm/yr in the latter 5 years of their lifespan, and the lifespan is typically around 8 years. [2]
These religious Christmas quotes and sayings are great for those who want to be reminded of the reason behind the holiday. They are full of sentiment and joy. Reflect on the Meaning of the ...
People have been found to perceive images with spiritual or religious themes or import, sometimes called iconoplasms or simulacra, in the shapes of natural phenomena. The images perceived, whether iconic or aniconic , may be the faces of religious notables or the manifestation of spiritual symbols in the natural, organic media or phenomena of ...
We come in contact with it all the time, but the markings on the one-dollar bill remain shrouded in mystery. Until now. 1. The Creature. In the upper-right corner of the bill, above the left of ...
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Below is an alphabetical list of widely used and repeated proverbial phrases. If known, their origins are noted. A proverbial phrase or expression is a type of conventional saying similar to a proverb and transmitted by oral tradition.