Echinoderms, Nekum, Maastricht, Berg en Terblijt (Cretaceous of Netherlands)

Where: Limburg, Netherlands (50.9° N, 5.8° 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: transition zone or lower shoreface; poorly lithified packstone

• Poorly indurated, white yellowish, coarse-grained, homogeneous chalks

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 32168: authorized by Loic Villier, entered by Loic Villier on 08.06.2003

Creative Commons license: CC BY (attribution)

Taxonomic list

Echinoidea
 Irregularia - Nucleolitidae
 Cassiduloida -
Procassidulus lapiscancri2 Leske 1778 sea urchin
 Cassiduloida - Cassidulidae
 Holasteroida - Holasteridae
Hemipneustes striatoradiatus2 Leske 1778 sea urchin
 Stomopneustoida - Stomechinidae
Asteroidea
 Valvatida - Goniasteridae
Goniasteridae indet.3 Forbes 1841 sea star
4 species of indeterminated goniasterids
 Paxillosida - Astropectinidae
Astropectinidae indet.3 Gray 1840 sea star
Ophiuroidea
 Ophiurida - Ophiuridae
Felderophiura vanderhami Jagt 1991 brittle star
numerous discs, arms and thousands dissociated ossicles
 Ophiurida - Ophiosphalmidae
Ophiomusium lux Jagt 2000 brittle star
several dozens of discs, many fragments and dissociated radial shields and lateral arm plates
Crinoidea
 Comatulida - Conometridae
Amphorometra ex gr. conoidea1 Goldfuss 1839 Feather star
 Comatulida - Jaekelometridae
Jaekelometra ex gr. belgica1 Jaekel 1902 Feather star
 Comatulida - Notocrinidae
Semiometra saskiae1 Jagt 1999 Feather star