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Hemicidaris is an
extinct genus of
echinoids that
lived from the
Middle Jur****ic to the
Early Cretaceous. Its
remains have been
found in Africa, Asia...
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Hemicidaris specimen...
- The
fossils are all
characteristic Oolite forms and
include species of
Hemicidaris, Pholadomya, Ceromya,
Trigonia and Alaria.
Igneous Rocks.–
Above a height...
- 1857 †
Asterocidaris Cotteau, 1859 †
Gymnocidaris L. Ag****iz, 1838 †
Hemicidaris L. Ag****iz, 1838 †
Subfamily Pseudocidarinae Smith & Wright, 1993 † Cidaropsis...
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Formation Phymopedina P.
marchamensis Painten Painten Formation P. sp
Hemicidaris H.
intermedia Eichstätt, Zandt,
Painten Altmühltal Formation, Painten...
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Paracentrotus lividus (Camarodonta)
Stomopneustes variolaris (Stomopneustoida)
Hemicidaris intermedia (Hemicidaridae)
Acrocidaris nobilis (Pseudodiadematidae) Andreas...
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Hardouinia Hattopsis Heliocidaris Heliophora Helodiadema Hemiaster Hemicara Hemicidaris Hemidiadema Hemifaorina Hemigymnia Hemipedina Hemipneustes Hemithylus...
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Speeton are in the zone of
Belemnites lateralis.
Other marine fossils are
Hemicidaris purbeckensis and
Ostrea distonta, the
latter being abundant in the Cinder...
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nobilis Echinoidea Cidaroida Diplocidaris D.
gigantea Echinoidea Cidaroida Hemicidaris H.
crenularis Echinoidea Hemicidaroida Acrocidaris A.
nobilis Echinoidea...
- belemnoids, tusk s****,
sponges like Peronidella, crinoids, sea
urchins like
Hemicidaris,
brittle stars,
starfish like Pentasteria,
crustaceans like Eryma, and...
