-
Division series.
-
Distal arm.
-
Proximal arm and pinnules (P1, P2)
-
Arm base side view showing P1 - P4.
-
Distal arm.
-
Complete aboral view.
-
Adoral disk surface.
-
Cirrus tip.
-
Middle arm aboral view.
-
Middle arm side view.
-
Proximal pinnules on arm.
-
Arm showing third pinnule (P3).
-
-
-
from Smith, A.B. 2013. Geological history of bathyal echinoid faunas, with a new genus from the late Cretaceous of Italy. Geological Magazine, 150/1, 177-182.
-
from Smith, A.B. 2013. Geological history of bathyal echinoid faunas, with a new genus from the late Cretaceous of Italy. Geological Magazine, 150/1, 177-182.
-
Palhemiaster natalyae Jagt et al., 2013 (holotype NHMM 2012 077) in various aspects. Scale bar equals 10 mm. from Jagt, J. W. M., Jagt-Yazykova, E. A. & Zonova, T. D. 2013. Notes on selected Cretaceous echinoids from south-central Sakhalin, Far East Russia. Netherlands Journal of Geosciences / Geologie en Mijnbouw 92/2-3, 123-132
-
Palhemiaster natalyae Jagt et al., 2013 (holotype NHMM 2012 077). Apical disc (top), plastron (middle) and peripetalous fasciole (bottom). from Jagt, J. W. M., Jagt-Yazykova, E. A. & Zonova, T. D. 2013. Notes on selected Cretaceous echinoids from south-central Sakhalin, Far East Russia. Netherlands Journal of Geosciences / Geologie en Mijnbouw 92/2-3, 123-132
-
2012-10-13. by Dr. WJ Chen from SiaoLioucious, Pingtung County, Taiwan, ROC
-
-
Apical disc details of Carnarechinus clypeatus modified from Mironov (1978: fig. 1). Scale bar equals 10 mm; interambulacra shaded. Mironov, A. N. 1978. [Meridosternous echinoids (Echinoidea: Meridosternina) collected during the 16th cruise of the R/V 'Dm. Mendeleev']. Trudy Instituta Okeanologii, Akademii Nauk SSSR, 113, 208-226.
-
Adoral plating of (A) the plastron (intermabulacrum 5) and one of the paired ambulacra (B) of Carnarechinus clypeatus modified from Mironov (1978: fig. 1). Scale bar equals 2 mm; interambulacra shaded. Mironov, A. N. 1978. [Meridosternous echinoids (Echinoidea: Meridosternina) collected during the 16th cruise of the R/V 'Dm. Mendeleev']. Trudy Instituta Okeanologii, Akademii Nauk SSSR, 113, 208-226.
-
Sierradiadema kristini (holotype CASG 72939); image courtesy of Rich Mooi, California Academy of Science (CAS).
-
Image provided by ReefLifeApps (http://reeflifeapps.com) Please inform the author before republishing. Possibly a species of Heterometra, but there are over 20 accepted species in the genus, and it cannot be identified from the image. It is more likely a species of Liparometra or possibly Stephanometra