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Nanosaurus agilis
Taxonomy
Nanosaurus agilis was named by Marsh (1877). Its type specimen is YPM 1913, a partial skeleton, and it is a 3D body fossil. Its type locality is Lucas's Site, Garden Park, which is in a Tithonian channel sandstone in the Morrison Formation of Colorado.
It was considered a nomen dubium by Sues and Norman (1990); it was considered a nomen dubium by Norman et al. (2004).
It was considered a nomen dubium by Sues and Norman (1990); it was considered a nomen dubium by Norman et al. (2004).
Synonyms
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Synonymy list
Year | Name and author |
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1877 | Nanosaurus agilis Marsh |
1877 | Nanosaurus rex Marsh |
1877 | Nanosaurus agilis Marsh p. 254 |
1877 | Nanosaurus rex Marsh p. 516 |
1878 | Laosaurus gracilis King p. 346 |
1878 | Nanosaurus agilis King p. 346 |
1878 | Laosaurus gracilis Marsh |
1878 | Nanosaurus agilis Marsh p. 244 |
1880 | Morosaurus rex Sauvage p. 523 |
1890 | Nanosaurus agilis Zittel p. 766 |
1894 | Laosaurus consors Marsh |
1894 | Laosaurus gracilis Marsh |
1894 | Nanosaurus agilis Marsh |
1894 | Nanosaurus rex Marsh |
1894 | Laosaurus consors Marsh p. 87 |
1896 | Laosaurus gracilis Marsh p. 199 |
1896 | Nanosaurus agilis Marsh p. 199 |
1896 | Nanosaurus rex Marsh p. 200 |
1896 | Laosaurus consors Marsh p. 202 |
1897 | Nanosaurus agilis Marsh p. 484 |
1897 | Nanosaurus rex Marsh p. 485 |
1897 | Laosaurus consors Marsh p. 503 |
1900 | Laosaurus gracilis Knight p. 384 |
1901 | Laosaurus consors Nopcsa p. 209 |
1901 | Laosaurus gracilis Nopcsa p. 209 |
1901 | Nanosaurus agilis Nopcsa p. 209 |
1901 | Nanosaurus rex Nopcsa p. 209 |
1902 | Laosaurus consors Hay p. 501 |
1902 | Laosaurus gracilis Hay p. 501 |
1902 | Nanosaurus agilis Hay p. 505 |
1902 | Nanosaurus rex Hay p. 505 |
1902 | Nanosaurus agilis Nopcsa p. 152 |
1902 | Nanosaurus rex Nopcsa p. 152 |
1902 | Laosaurus consors Nopcsa p. 153 |
1902 | Laosaurus gracilis Nopcsa p. 153 |
1908 | Nanosaurus agilis Huene and Lull p. 134 |
1911 | Laosaurus consors Lull p. 206 |
1914 | Nanosaurus agilis Huene p. 16 |
1916 | Laosaurus consors Mook p. 146 |
1916 | Laosaurus gracilis Mook p. 146 |
1924 | Laosaurus consors Gilmore p. 5 |
1924 | Laosaurus gracilis Gilmore p. 5 |
1925 | Laosaurus consors Gilmore p. 396 |
1925 | Laosaurus gracilis Gilmore p. 403 |
1930 | Nanosaurus agilis Hay p. 204 |
1930 | Nanosaurus rex Hay p. 204 |
1930 | Laosaurus consors Hay p. 206 |
1930 | Laosaurus gracilis Hay p. 206 |
1934 | Laosaurus consors Huene p. 17 |
1954 | Laosaurus gracilis Untermann and Untermann p. 90 |
1964 | Laosaurus consors Kuhn p. 7 |
1964 | Laosaurus gracilis Kuhn p. 7 |
1964 | Nanosaurus agilis Kuhn p. 8 |
1964 | Laosaurus gracilis Tatarinov p. 554 fig. 599 |
1967 | Nanosaurus rex Charig p. 716 |
1975 | Nanosaurus rex Galton p. 748 |
1975 | Laosaurus consors Thulborn p. 125 |
1977 | Othnielia rex Galton |
1977 | Nanosaurus agilis Galton p. 230 |
1978 | Nanosaurus agilis Galton p. 156 |
1983 | Othnielia rex Galton p. 10 |
1983 | Nanosaurus agilis Galton pp. 232-233 |
1983 | Othnielia rex Galton p. 233 |
1983 | Nanosaurus agilis Weishampel and Weishampel p. 44 |
1983 | Othnielia rex Weishampel and Weishampel p. 44 |
1990 | Drinker nisti Bakker p. 3 |
1990 | Othnielia consors Bakker p. 3 |
1990 | Othnielia rex Bakker p. 3 |
1990 | Nanosaurus agilis Bakker et al. p. 8 |
1990 | Othnielia consors Bakker et al. p. 8 |
1990 | Othnielia rex Bakker et al. p. 8 |
1990 | Drinker nisti Bakker et al. p. 9 |
1990 | Othnielia rex Sues and Norman p. 500 |
1990 | Othnielia rex Thulborn p. 181 |
1991 | Nanosaurus agilis Sereno p. 173 |
1992 | Othnielia rex Weishampel and Heinrich p. 171 |
1994 | Othnielia rex Chure et al. p. 304 |
1994 | Drinker nisti Chure et al. p. 306 |
1994 | Drinker nisti Molnar and Wiffen p. 693 |
1996 | Drinker nisti Bakker p. 41 fig. 5 |
1997 | Nanosaurus agilis Carpenter p. 91 |
1997 | Drinker nisti Sues p. 357 |
1997 | Othnielia rex Sues p. 357 |
2002 | Othnielia rex Buchholz p. 19 |
2004 | Drinker nisti Norman et al. p. 394 |
2004 | Othnielia rex Norman et al. p. 395 |
2006 | Drinker nisti Chure et al. p. 237 |
2006 | Othnielia rex Chure et al. p. 237 |
2006 | Drinker nisti Mateus p. 231 |
2006 | Nanosaurus agilis Mateus p. 231 |
2006 | Othnielia rex Mateus p. 231 |
2006 | Drinker nisti Pierce p. 163 |
2006 | Othnielia rex Pierce p. 163 |
2007 | Othnielosaurus consors Galton p. 28 |
2007 | Drinker nisti Galton p. 34 |
2007 | Nanosaurus agilis Galton p. 34 |
2008 | Othnielosaurus consors Butler and Galton p. 640 |
2008 | Othnielia rex Butler et al. p. 10 |
2009 | Othnielosaurus consors Galton p. 214 |
2010 | Othnielosaurus consors Galiano and Albersdörfer p. 5 |
2012 | Nanosaurus agilis Decker p. 8 |
2012 | Othnielosaurus consors Han et al. p. 1391 fig. 14 |
2016 | Othnielosaurus consors Becerra et al. p. 559 |
2016 | Othnielosaurus consors Foster et al. p. 59 |
2018 | Nanosaurus agilis Carpenter and Galton p. 176–177 |
2018 | Othnielosaurus consors Herne et al. p. 42 |
2018 | Drinker nisti Herne et al. p. 46 |
2019 | Othnielosaurus consors Cruzado-Caballero et al. p. 216 |
2019 | Nanosaurus agilis Herne et al. p. 557 |
2019 | Othnielosaurus consors Herne et al. p. 572 |
2020 | Nanosaurus agilis Dieudonné et al. |
2020 | Nanosaurus agilis Dieudonné et al. p. 411 |
2020 | Nanosaurus agilis Foster et al. p. 41 |
2023 | Nanosaurus agilis Manitkoon et al. p. 4 |
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
†Nanosaurus agilis Marsh 1877
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Invalid names: Drinker nisti Bakker et al. 1990 [synonym], Othnielia rex Marsh 1877 [synonym], Othnielosaurus consors Marsh 1894 [synonym]
Diagnosis
Reference | Diagnosis | |
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K. Carpenter and P. M. Galton 2018 | Several characters are shared by "Othnielosaurus” and “Drinker” specimens: (1) The multi-cuspid marginal denticles on the cheek teeth, once thought to be unique to the type material of “Drinker”, are now known to occur in the posterior teeth of juvenile “Othnielosaurus” (see discussion by Galton, 1983) (figure 10). (2) Some of the cheek teeth have a variably developed cingulum, often denticulate, along the posterior(?) edge that curves onto the lingual(?) face; this unusual character is otherwise only known in some Late Cretaceous ornithischians, such as Pachycephalosaurus (figure 10; Brown and Schlaikjer, 1943, plate 40, figure 1). (3) The tooth row of the dentary extends to posterior end of the tomial edge of predentary (figure 7). This can be inferred for the holotype of Nanosaurus because of how far forwards the teeth extend. (4) Jugal with ornamentation, which is an unusual feature among ornithopods (figure 11). (5) The ilium has an antitrochanter dorsal and adjacent to ischial peduncle (figure 15). (6) The brevis shelf of the ilium is narrow compared to length of postacetabular process (figure 15). (7) The pubis has a slightly compressed, tapering, rod-like anterior process figure 15). (8) The ascending ramus of the astragalus is a short, vertical spur either located near the middle of the front edge (YPM 1882) or offset towards the calcaneum (BYU 613) (see figure 17). (9) Metatarsal I is over 50% the length of metatarsal III and bears two unreduced phalanges (figure 18). |
Measurements
No measurements are available
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Source: subo = suborder, o = order | |||||
References: Benton 1983, Marsh 1875 |
Age range: base of the Late/Upper Kimmeridgian to the top of the Early/Lower Kimmeridgian or 155.70000 to 150.80000 Ma
Collections (18 total)
Time interval | Ma | Country or state | Original ID and collection number |
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Late/Upper Oxfordian - Early/Lower Kimmeridgian | USA (Wyoming) | Othnielosaurus consors (126540) | |
Kimmeridgian | USA (Wyoming) | Dryosaurus sp. (46465) | |
Kimmeridgian - Tithonian | USA (Utah) | Nanosaurus rex (47196) | |
Kimmeridgian - Tithonian | USA (Wyoming) | Drinker nisti (55486 192746 230770 231545 231574) Laosaurus gracilis, Laosaurus consors, Drinker nisti, Othnielia rex, Nanosaurus agilis (12816) Ornithischia indet., Dryosaurus sp., Othnielia sp., Allosaurus sp. (49636) | |
Kimmeridgian - Tithonian | USA (Colorado) | Othnielosaurus consors (11611) | |
Late/Upper Kimmeridgian - Early/Lower Tithonian | USA (Colorado) | Laosaurus gracilis (28366) | |
Late/Upper Kimmeridgian - Tithonian | USA (Wyoming) | Ornithopoda indet. (74663) | |
Tithonian | USA (Wyoming) | Drinker nisti (49629 177492) Laosaurus consors (39346) | |
Tithonian | USA (Colorado) | Nanosaurus agilis (type locality: 48168) Othnielia rex (48166) |