URMO Taxon list
Adropion arduifrons (Thulin, 1928) accepted as Guidettion arduifrons (Thulin, 1928)
Adropion behanae (Dastych, 1987) accepted as Kararehius behanae (Dastych, 1987)
Adropion belgicae (Richters, 1911)
Adropion carolae (Binda & Pilato, 1969) accepted as Guidettion carolae (Binda & Pilato, 1969)
Adropion clavatum (Bartoš, 1935) accepted as Guidettion clavatum (Bartoš, 1935)
Adropion gordonense (Pilato, Claxton & Horning, 1991)
Adropion greveni (Dastych, 1984)
Adropion marcusi (Rudescu, 1964) (uncertain > nomen dubium )
Adropion mauccii (Dastych & McInnes, 1996)
Adropion modestum (Binda, Pilato & Dastych, 1984) accepted as Guidettion modestum (Binda, Pilato & Dastych, 1984)
Adropion montigenum (Pilato & Dastych, 1974) accepted as Guidettion montigenum (Pilato & Dastych, 1974)
Adropion onorei (Pilato, Binda, Napolitano & Moncada, 2002)
Adropion prorsirostre (Thulin, 1928) accepted as Guidettion prorsirostre (Thulin, 1928)
Adropion punctatum (Iharos, 1962)
Adropion scoticum (Murray, 1905)
Adropion tricuspidatum (Binda & Pilato, 2000) accepted as Kararehius tricuspidatum (Binda & Pilato, 2000)
Adropion triodon Maucci, 1996 accepted as Kararehius triodon (Maucci, 1996)
Astatumen bartosi (Weglarska, 1959)
Astatumen ramazzotti (Iharos, 1966) accepted as Astatumen trinacriae (Arcidiacono, 1962)
Astatumen tamaensis (Sudzuki, 1975)
Astatumen tamurai (Ito, 1990)
Astatumen trinacriae (Arcidiacono, 1962)
Guidettion arduifrons (Thulin, 1928)
Guidettion carolae (Binda & Pilato, 1969)
Guidettion clavatum (Bartoš, 1935)
Guidettion modestum (Binda, Pilato & Dastych, 1984)
Guidettion montigenum (Pilato & Dastych, 1974)
Guidettion prorsirostre (Thulin, 1928)
Itaquascon bartosi Węglarska, 1959 accepted as Astatumen bartosi (Weglarska, 1959)
Itaquascon biserovi Pilato, Binda & Moncada, 1999
Itaquascon cambewarrense Pilato, Binda & Claxton, 2002
Itaquascon enckelli (Mihelcic, 1971)
Itaquascon globuliferum Abe & Ito, 1994 accepted as Raribius globuliferus (Abe & Ito, 1994)
Itaquascon mongolicus Kaczmarek, Michalczyk & Weglarska, 2002
Itaquascon pawlowskii Weglarska, 1973 accepted as Raribius pawlowskii (Weglarska, 1973)
Itaquascon placophorum Maucci, 1973
Itaquascon ramazzotti Iharos, 1966 accepted as Astatumen trinacriae (Arcidiacono, 1962)
Itaquascon simplex (Mihelcic, 1971)
Itaquascon tamaensis Sudzuki, 1975 accepted as Astatumen tamaensis (Sudzuki, 1975)
Itaquascon tamurai Ito, 1990 accepted as Astatumen tamurai (Ito, 1990)
Itaquascon trinacriae Arcidiacono, 1962 accepted as Astatumen trinacriae (Arcidiacono, 1962)
Itaquascon umbellinae de Barros, 1939
Itaquascon unguiculum Pilato, Binda & Claxton, 2002
Meplitumen itaquasconoide (Durante Pasa & Maucci, 1975)
Mesocrista marcusi (Rudescu, 1964) accepted as Adropion marcusi (Rudescu, 1964)
Mesocrista spitzbergensis (Richters, 1903)
Parascon nichollsae Pilato & Lisi, 2004
Parascon schusteri Pilato & Binda, 1987
Platicrista affine (Mihelcic, 1951)
Platicrista angustata (Murray, 1905)
Platicrista cheleusis Kathman, 1990
Platicrista horribilis Kaczmarek & Michalczyk, 2003
Platicrista itaquasconoide (Durante Pasa & Maucci, 1975) accepted as Meplitumen itaquasconoide (Durante Pasa & Maucci, 1975)
Platicrista ramsayi Marley, 2006
Raribius globuliferus (Abe & Ito, 1994)
Raribius pawlowskii (Weglarska, 1973)