Crossword-Solution: DIADEMATIDAE
We have 2 clues for the answer “DIADEMATIDAE”
| Clue | Answers |
|---|---|
| BLACK sea urchin (family) | 1 answer |
| black sea urchin | 1 answer |
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Section of a curve
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A
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R
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C
Hint 1 meaning
The apparent arc described, above or below the horizon, by the
sun or other celestial body. The diurnal arc is described during the
daytime, the nocturnal arc during the night.
Hint 2 anagram
RAC
Hint 3 another clue
AID WHEN GOING TO COURT
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Sentences with DIADEMATIDAE (3)
These pouches are supposed to be respiratory, and are termed INTERNAL GILLS or STEWART'S ORGANS.[488] They co-exist with external gills in Echinothuriidae and in Diadematidae, though in the last family they are present only in a vestigial form, two being found in each radius.
TUBE-FEET.—The tube-feet belonging to the aboral surface are pointed and devoid of a sucker in Diadematidae, Echinothuriidae, Arbaciidae, and Cidaridae;[490] in the last-named family those belonging to the oral surface have suckers, in the centre of which a pointed (sensory) prominence is to be noted.
The Saleniidae, Echinothuriidae, and Diadematidae appear in the Jurassic, the Echinidae in the Cretaceous, and the Arbaciidae only in the Tertiary epoch.