-
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...
- 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...
-
Hardouinia Hattopsis Heliocidaris Heliophora Helodiadema Hemiaster Hemicara Hemicidaris Hemidiadema Hemifaorina Hemigymnia Hemipedina Hemipneustes Hemithylus...
-
Paracentrotus lividus (Camarodonta)
Stomopneustes variolaris (Stomopneustoida)
Hemicidaris intermedia (Hemicidaridae)
Acrocidaris nobilis (Pseudodiadematidae) Andreas...
-
Speeton are in the zone of
Belemnites lateralis.
Other marine fossils are
Hemicidaris purbeckensis and
Ostrea distonta, the
latter being abundant in the Cinder...
- belemnoids, tusk s****,
sponges like Peronidella, crinoids, sea
urchins like
Hemicidaris,
brittle stars,
starfish like Pentasteria,
crustaceans like Eryma, and...
- †Heliosocrinus †Helodiadema †Hemiaster †Hemibrachiocrinus †Hemicara †
Hemicidaris †Hemicosmites †Hemicrinus †Hemicystites †Hemidiadema †Hemieurylae †Hemifaorina...
-
nobilis Echinoidea Cidaroida Diplocidaris D.
gigantea Echinoidea Cidaroida Hemicidaris H.
crenularis Echinoidea Hemicidaroida Acrocidaris A.
nobilis Echinoidea...
- sure. This
attribution is certain:
Hemicidaris stokesii (Wright 1857), an
extinct sea
urchin in
genus Hemicidaris These attributions seem plausible: Acinophyllum...
