Genus PROTOCERATOPS
Kingdom / Phylum . . . . . . . . Subphylum / Superclass . . . . Class / Subclass . . . . . . . . . . Infraclass / Division. . . . . . . . Subdivision / Infradivision . . . Superorder / Order. . . . . . . . Suborder / Infraorder . . . . . . Superfamily / Family . . . . . . . Subfamily / Genus . . . . . . . . .	Animalia / Chordata Cephalochordata / Gnathostomata Reptilia / Diapsida Archosauromorpha / Archosauria Avemetatarsalia / Ornithodira Dinosauria / Ornithischia Ceratopsia / Neoceratopsia n.a. / Protoceratopsidae n.a. / Protoceratops
Age: Distribution:	early Late Cretaceous Central Asia
Depicted on: Afghanistan, 1988 (15 A.) Antigua & Barbuda, 1992 (4 $.) Antigua & Barbuda, 1995 (positions 9, 10, 11, and 12 of sheet) Barbuda, 1992 (4 $.) Barbuda, 1996 (positions 9, 10, 11, and 12 of sheet) Bulgaria, 1990 (32 c. and set in sheet) Cambodia, 1995 (200 R.) Central African Republic, 2001 (M.S. 2, misspelled Proletarops) Central African Republic, 2015 (position 1 of sheet) Central African Republic, 2020 (position 3 of sheet) Chad, 2022 (position 3 of sheet) Comoros, 1999 (position 8 of sheet 1) Comoros, 2009 (dated 2010) (M.S., with nest) Djibouti, 2023 (position 1 of sheet) Gabon, 1995 (position 6 of sheet 3) Gambia, 1997 (5 D.) Grenada, 1997 (position 6 of sheet) Guinea, 1999 (position 3 of sheet) Guinea, 2019 (position 4 of sheet, fossil skeleton) Guinea-Bissau, 2024 (sheet margin) Guyana, 1993 (position 9 of sheet 2) Hong Kong, 2014 (3,70 $., position 5 of M.S.) Kirgizia, 1998 (position 6 of sheet) Korea (North), 2010 (sheet margin, also imperf) Korea (South), 2012 (position 4 of sheet) Laos, 1995 (70 K.) Liberia, 1999 (position 9 of sheet 1) Liberia, 2024 (position 1 of sheet, M.S. 3) Madagascar, 1994 (525 Fr.) Madagascar, 1999 (overprint '500 Fr.' on 1994 issue) Marshall Islands, 2015 (position 3) Mongolia, 1967 (15 c.) Mongolia, 2022 (M.S., M.S. margin) Mozambique, 2002 (5000 M., as 'Protosaurus') Mozambique, 2015 (M.S.) Nauru, 2006 (2,50 $.) Niger, 1996 (M.S.) Poland, 2000 (80 g. and set in M.S., also in stamp booklet) Saint Vincent & the Grenadines, 1994 (position 12 of sheet 4) Saint Vincent & the Grenadines, 2001 (1,40 $.) Sao Tome e Principe, 2007 (position 1 of sheet and M.S. 1) Sierra Leone, 1995 (position 3 of sheet 1) Sierra Leone, 2018 (position 1 of sheet) Somalia, 1993 (M.S. margin) Tanzania, 1999 (position 4 of sheet 1) United Kingdom, 1991 (33 p., skeleton and outline) Zambia, 1999 (500 K.)   Stamp booklet cover, Japan, 2003 Stamp booklet cover, Czech Republic, 1994.