With the exception of polycopids, Mesozoic myodocopid ostracods are regarded as uncommon
in the fossil record. They are known from a few localities in the Tethys, and most
of them are considered to be pelagic forms. However, a relatively rich and taxonomically
diverse material is derived from Hungarian sections; these represent various formations
deposited during the Triassic to Cretaceous. The aim of this study is to summarize
the current knowledge of Mesozoic myodocopids and to provide new information concerning
their classification and phylogenetic relations. This includes new occurrences of
Triassic entomozoid Schallreuterizoe groosae Kozur, 2004, cylindroleberidid Triadocypris
sp., cypridinid Palaeocypridina tulceaensis Sebe, 2013, Jurassic thaumatocyprid Pokornyopsis
cf. bettenstaedti (Bartenstein, 1949) and P. feifeli (Triebel, 1941). The revision
of the holotype of gigantic Triassic Triadogigantocypris balatonica Monostori, 1991
give new results concerning the valve structure and taxonomic position of the genus.
Two new genera (Neorichterina n. gen. and Hungaroleberis n. gen.) and four new species
(Neorichterina striata n. sp., Pokornyopsis csurgokutensis n. sp., Hungaroleberis
retiferus n. sp. and Palaeocypridina goeroegae n. sp.) of the subclass Myodocopa are
described. Moreover, most of the Albian to Cenomanian representatives of "Conchoecia"
are newly classified as Entomozoidae (Neorichterina n. gen.), which allows to extend
the range of the family up to the Cretaceous. A summary of the relevant assemblages
present in Hungary will help to complement the existing, previously published literature
on myodocopids, and also clarify details about the phylogenetic model of the group.
