''Aeger'' is a
genus
Genus ( plural genera ) is a taxonomic rank used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In the hierarchy of biological classification, genus com ...
of
fossil
A fossil (from Classical Latin , ) is any preserved remains, impression, or trace of any once-living thing from a past geological age. Examples include bones, shells, exoskeletons, stone imprints of animals or microbes, objects preserved ...
prawns
Prawn is a common name for small aquatic crustaceans with an exoskeleton and ten legs (which is a member of the order decapoda), some of which can be eaten.
The term "prawn"Mortenson, Philip B (2010''This is not a weasel: a close look at nature ...
. They first occur in the
Middle Triassic
In the geologic timescale, the Middle Triassic is the second of three epochs of the Triassic period or the middle of three series in which the Triassic system is divided in chronostratigraphy. The Middle Triassic spans the time between Ma and ...
, and died out at the end of the
Late Cretaceous
The Late Cretaceous (100.5–66 Ma) is the younger of two epochs into which the Cretaceous Period is divided in the geologic time scale. Rock strata from this epoch form the Upper Cretaceous Series. The Cretaceous is named after ''creta'', the ...
.
A total of 21 species are known.
Species
* ''
Aeger brevirostris''
* ''
Aeger brodiei''
* ''
Aeger elegans
''Aeger elegans'' is a species of fossil prawn
Prawn is a common name for small aquatic crustaceans with an exoskeleton and ten legs (which is a member of the order decapoda), some of which can be eaten.
The term "prawn"Mortenson, Philip B ...
''
* ''
Aeger elongatus''
* ''
Aeger foersteri''
* ''
Aeger fraconicus''
* ''
Aeger gracilis''
* ''
Aeger hidalguensis''
* ''
Aeger insignis''
* ''
Aeger laevis''
* ''
Aeger lehmanni''
* ''
Aeger libanensis
''Aeger libanensis'' is a species of fossil prawn belonging to the family Aegeridae. These prawns had very long pereiopods.
Fossil record
Fossils of ''Aeger libanensis'' are found in the Cenomanian (Late Cretaceous) marine outcrops at Hjoula an ...
''
* ''
Aeger luxii''
* ''
Aeger macropus''
* ''
Aeger marderi''
* ''
Aeger muensteri''
* ''
Aeger robustus''
* ''
Aeger rostrospinatus''
* ''
Aeger spinipes''
* ''
Aeger straeleni''
* ''
Aeger tipularius''
References
Dendrobranchiata
Prehistoric Malacostraca
Prehistoric crustacean genera
Jurassic crustaceans
Prehistoric life of Europe
Middle Triassic genus first appearances
Late Cretaceous genus extinctions
{{Dendrobranchiata-stub