In World Ostracoda Database it is only recent, but in Morkhoven, 1963 it is Cenomanian-Recent, and there are some fossil forms described in the literature like Argilloecia faba Alexander 1934 from Eocene.
Ibrahim:
It seems to extend down into Pennsylvanian-Permian (p. 163 in the link):
https://books.google.co.in/books?id=cTICAQAAQBAJ&pg=PA163&lpg=PA163&dq=Argilloecia+Cretaceous&source=bl&ots=pU7sx_m_Rs&sig=nOkGOWb4buJYhfEpFxdOjIBUyvo&hl=en&sa=X&ved=0ahUKEwig676yiL7QAhWKLI8KHYl4AlgQ6AEIJjAD#v=onepage&q=Argilloecia%20Cretaceous&f=false
Best
Syed
WoRMS is not always correct. If you spot any errors then report them to the editor for Ostracoda, Simone Nunes-Brandao, she is on ResearchGate and may reply to you (see link). If you simply click through the list of Argilloecea species in the list then you will see the distribution of each one, and there are many that have fossil occurrences.
http://www.marinespecies.org/imis.php?module=person&persid=16117
In the "Kempf Database Ostracoda" about 120 species are registered that have
ever been ascribed to the genus Argilloecia. Most fossil representatives of
the genus Argilloecia are known with certainty from Quaternary and Tertiary
strata. But some certain fossil Argilloecia species date even back to the
Upper Cretaceous, especially Maastrichtian, like
Argilloecia decussata Bonnema,1940, Argilloecia projecta Herrig,1964,
or Argilloecia transitiva Mandelstam & Luebimova, 1960.
The descriptions of Argilloecia species from older deposits, especially
the Paleozoic, are in need of careful revision and will have to be ascribed
to other genera. For instance, Argilloecia subelliptica Upson,1933 from
Upper Pennsylvanian or Lower Permian strata of Nebraska were later made
known as Coryellites subelliptica (Upson, 1933) Cooper, 1946.
Unfortunately, the smooth shells of representatives of Argilloecia deliver
only a small number of characteristics, of which the outline of the
valves seems to be the most important one, if the preservation of the
fossils is not the best.
Eugen:
What about Late Palaeozoic Argilloecia regularis Delo, 1930? What's your opinion?
http://soostracoda.myspecies.info/taxonomy/term/8052
Best
Syed
Syed
Argilloecia regularis Delo, 1930 is still listed like that in
my database. Until now I did not find any publication with a
taxonomic revision of that species which was also reported by
Upson from near Manhattan, Kansas, in his Nebraska paper of 1933.
I think, a careful revision and modern documentation of the
type material is necessary. Unfortunately, the number of
scientists working on Palaeozoic ostracods has dropped considerably
during past years.
Best wishes
Eugen
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