Echinoderms, Nekum, Maastricht, Enci-Maastricht (Cretaceous of Netherlands)

Where: Netherlands (50.9° N, 5.7° E: paleocoordinates 43.4° N, 4.6° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Nekum Member (Maastricht Formation), Late/Upper Maastrichtian (70.6 - 66.0 Ma)

• member-level stratigraphic resolution

Environment/lithology: shoreface; poorly lithified packstone

• Poorly indurated, white yellowish, coarse-grained, homogeneous chalks. Local coarse-grained fossil hash lenses and beds

Size classes: macrofossils, mesofossils

Preservation: original calcite

Collection methods: bulk, surface (float), surface (in situ), sieve,

Primary reference: J. W. M. Jagt. 2000. Late Cretaceous-Early Paleocene echinoderms and the K/T boundary in the southeast Netherlands and the northeast Belgium. - part 3: Ophiuroids. Scripta Geologica 21:1-179 [L. Villier/L. Villier/L. Villier]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 32161: authorized by Loic Villier, entered by Loic Villier on 07.06.2003

Creative Commons license: CC BY (attribution)

Taxonomic list

Ophiuroidea
 Phrynophiurida - Trichasteridae
? Trichaster ornatus Rasmussen 1950 brittle star
numerous vertebrae
 Ophiurida - Ophiomyxidae
? Ophiomyxa jekerica Berry 1938 brittle star
several dozens of vertebrae
 Ophiurida - Ophiuridae
Felderophiura vanderhami, "Ophiotitanos serrata" = Ophiura serrata
Felderophiura vanderhami Jagt 1991 brittle star
numerous discs, arms and thousands dissociated ossicles
"Ophiotitanos serrata" = Ophiura serrata Roemer 1841 brittle star
few arm fragments
Asteroidea
 Paxillosida - Astropectinidae
Astropectinidae indet.4 Gray 1840 sea star
Aldebarania taberna1 Blake and Jagt 2005 sea star
 Valvatida - Sphaerasteridae
 Valvatida - Goniasteridae
Goniasteridae indet.4 Forbes 1841 sea star
2 species of indeterminated goniasterids
Chomataster acules4 Spencer 1913 sea star
Echinoidea
 Stomopneustoida - Stomechinidae
 Holasteroida - Holasteridae
Hemipneustes striatoradiatus3 Leske 1778 sea urchin
Cardiaster ex gr. granulosus3 Goldfuss 1826 sea urchin
 Spatangoida -
 Spatangoida - Hemiasteridae
Hemiaster koninckanus3 heart urchin
Hemiaster prunella3 Lamarck 1816 heart urchin
 Cassiduloida -
Procassidulus lapiscancri3 Leske 1778 sea urchin
 Irregularia - Nucleolitidae
 Clypeasteroida - Faujasiidae
Rhynchopygus marmini3 Agassiz 1847 sand dollar
 Salenioida - Saleniidae
"Salenia maestrichtensis" = Salenidia maestrichtensis3
"Salenia maestrichtensis" = Salenidia maestrichtensis3 Schluter 1892 sea urchin
 Euechinoidea - Orthopsidae
Orthopsis miliaris3 d'Archiac 1835 sea urchin
Crinoidea
 Cyrtocrinida -
 Comatulida -
 Isocrinida - Cainocrinidae
 Roveacrinida - Saccocomidae