Clusters of shallow pits in gastropod shells from the type area of the Maastrichtian (Upper Cretaceous, the Netherlands)

被引:2
|
作者
Donovan, Stephen K. [1 ]
Jagt, John W. M. [2 ]
van Knippenberg, Paul H. M. [3 ]
机构
[1] Nat Biodivers Ctr, Taxon & Systemat Grp, Postbus 9517, NL-2300 RA Leiden, Netherlands
[2] Nat Hist Museum Maastricht, Bosquetpl 6-7, NL-6211 KJ Maastricht, Netherlands
[3] Gelrestr 10, NL-5995 XH Kessel, Netherlands
来源
BULLETIN OF GEOSCIENCES | 2019年 / 94卷 / 04期
关键词
Maastricht Formation; Meerssen Member; Salsariichnus; domichnia; HEMIPNEUSTES-STRIATORADIATUS LESKE; OICHNUS-EXCAVATUS DONOVAN; ATTACHMENT SCARS; TRACE; STRATIGRAPHY; ORGANISMS; FOSSIL; JAGT;
D O I
10.3140/bull.geosci.1763
中图分类号
P [天文学、地球科学];
学科分类号
07 ;
摘要
Close-set, shallow pits are preserved in external moulds of one species each of campanilid and aporrhaid gastropods from coquinas in the uppermost Maastrichtian Meerssen Member (subunit IVf-6) at the former Ankerpoort-Curfs quarry (Geulhem, southern Limburg, the Netherlands). These clustered pits are broad, dish-like, and rounded to polygonal where closely packed; a circular, sunken groove lies within the dish; and a central rounded dome has a central, rounded depression. The producing organism obviously pursued a gregarious lifestyle. These structures are referred to a new ichnotaxon, Salsariichnus collinsi igen. et isp. nov., which is considered to belong to the ethological class of domichnia. It differs in several respects from attachment scars (ichnogenus Lacrimichnus) and deeper embedment structures such as Oichnus excavatus that are known from coeval levels.
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页码:425 / 430
页数:6
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