Late Miocene decapod faunas at Gram, Denmark R. Fraaije, J. Hansen, & T. Hansen

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Decapod crustacean recognised from the upper Miocene at the Gram clay-pit, south-west Jutland, Denmark
 
  

Introduction

The silty, dark, micaceous clays in the Gram clay-pit has yielded many calcareous nodules with decapod crustacean remains over the past decades. The sequence was deposited in the Late Miocene Tortonian (LAURSEN & KRISTOFFERSEN, 1999). Although decapods from Gram are present in many private and museum collections no detailed study has been undertaken until now. Extensive "bed-by-bed" sampling by two of the authors (TH, JH) (Text fig. 2) has resulted in a detailed assessment of the distribution of decapods in the sequence and the faunas
Text fig. 2 Vertical distribution of decapods in the Gam Clayput
The lithological log is modified after Stockmarr (2000)

Systematic palaeontology

 
 
Order Decapoda Latreille, 1802
 
Infraorder Astacidea Latreille, 1803
 
Superfamily Nephropoidea Dana, 1852
 
Family Nephropidae Dana,1852
 
Subfamily Nephropinae Dana,1852
 
Genus Nephrops Leach, 1814
 
Nephrops kvistgaardae Fraaije R. Hansen J. & Hansen T., 2005
 
Genus Homarus Weber, 1795
 
Homarus? cf. gammarus (Linnaeus, 1758)
 
Superfamily Galatheoidea Samouelle, 1819
 
Family Galatheidea Samouelle, 1819
 
Subfamily Galatheinea Samouelle, 1819
 
Genus Munida Leach, 1820
 
Munida sp.
 
Infraorder Brachyura Latreille, 1803
 
Superfamily Retroplumoidea sensu Saint Laurent, 1989
 
Family Retroplumidae Gill, 1894
 
Genus Retropluma Gill, 1894
 
Retropluma borealis Fraaije R. Hansen J. & Hansen T., 2005
 
Family Cancridae Latreille, 1803
 
Subfamily Lobocarcininae Beurlen, 1930
 
Genus Tasadia Müller in Janssen & Müller, 1984
 
Tasadia carniolica (Bittner, 1884)
 
Superfamily Portunoidea Rafinesque, 1815
 
Family Geryonidae Colosi, 1923
 
Genus Chaceon Manning & Holthuis, 1989
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Chaceon miocenicus Fraaije R. Hansen J. & Hansen T., 2005
 

Reference:

 
Fraaije R., Hansen J. & Hansen T.(2005) The Marine Gram Formatin at Gram, Denmark: Late Miocene Geology and Palaeontology Part 1
  in Roth F. & Hoedemakers K. Palaeontos 7, 1-189, 32 text-figs, 3 tables, 16 plates.