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Homalocephale calathocercos
Taxonomy
Homalocephale calathocercos was named by Maryańska and Osmólska (1974). Its type specimen is MPC-D/GI SPS 100/1201 (= MPC-D/GI SPS 100/51), a partial skeleton, and it is a 3D body fossil. Its type locality is Nemegt, Western Sayr, site 8 [PMPE], which is in a Maastrichtian terrestrial conglomerate/sandstone in the Nemegt Formation of Mongolia.
Synonymy list
Year | Name and author |
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1974 | Homalocephale calathocercos Maryańska and Osmólska p. 56 figs. 1D, 4-5; Pl. 22:1, 24, 26-30, 31:1 |
1977 | Homalocephale calathocercos Rozhdestvensky p. 114 |
1979 | Homalocephale calathocercos Wall and Galton p. 1182 |
1982 | Homalocephale calathocercos Perle et al. pp. 116-117 |
1986 | Homalocephale calathocercos Zhao p. 72 |
1990 | Homalocephale calathocercos Maryanska p. 566 |
1994 | Homalocephale calathocercos Olshevsky and Ford p. 91 |
1997 | Homalocephale calathocercos Barsbold p. 449 |
1997 | Homalocephale calathocercos Osmólska p. 472 |
1997 | Homalocephale calathocercos Sues p. 512 |
2000 | Homalocephale calathocercos Sereno p. 482 |
2003 | Homalocephale calathocercos Williamson and Carr fig. 11 |
2004 | Homalocephale calathocercos Maryanska et al. p. 465 |
2006 | Homalocephale calathocercos Sullivan p. 353 |
2008 | Homalocephale calathocercos Butler et al. p. 9 |
2009 | Homalocephale calathocercos Butler and Sullivan p. 26 |
2009 | Homalocephale calathocercos Butler and Zhao p. 66 |
2009 | Homalocephale calathocercos Schott et al. p. 783 fig. 8 |
2009 | Homalocephale calathocercos Williamson et al. p. 292 |
2010 | Homalocephale calathocercos Longrich et al. p. 280 |
2012 | Homalocephale calathocercos Han et al. p. 1391 fig. 14 |
2012 | Homalocephale calathocercos Schott and Evans p. 909 |
2016 | Homalocephale calathocercos Currie p. 96 |
2018 | Homalocephale calathocercos Evans et al. p. 121 |
2019 | Homalocephale calathocercos Herne et al. p. 572 |
2020 | Homalocephale calathocercos Dieudonné et al. |
2020 | Homalocephale calathocercos Yang et al. p. 4 |
2021 | Homalocephale calathocercos Woodruff et al. p. 581 |
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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.
†Homalocephale calathocercos Maryańska and Osmólska 1974
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Diagnosis
Reference | Diagnosis | |
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T. Maryańska and H. Osmólska 1974 | Cranial roof thick but completely fiat. Supratemporal fenestra large. In- terfrontal and frontoparietal sutures distinct. Infratemporal fenestra low and long. Orbit large and nearly round. Quad rate deflected back ward s along the upper half of its length. Occipital region moderately concave, deepened centrally. Foramen magnum round and large. Occipital condyle large. Basaltubera flat anteroposteriorly, their ventral edges very close to quadratic wings of pterygoids. Ventral maxillary edge arched outwards posteriorly. Maxillary teeth with small crowns. Cranial roof roughly ornamented. | |
A. Perle et al. 1982 | Supratemporal fenestra rounded, interfenestral brigde broad, equal about the transverse width of supratemporal fenestra. Interfrontal and frontoparietal sutures distinct. Infratemporal fenestra broad anteroposteriorly and high dorsoventrally. Orbit large and nearly round. Dorsal part of quadrate deflected posteriorly. Occiput moderately concave, deepened at the centre. Foramen magnum relatively large, about one seventh of width of the occiput. Occipital condyle large. Ventral maxillary edge bowed laterally along its posterior portion. Cranial roo froughly ornamented. Sacrum incuding 6 coalesced vertebrae. Preacetabular process of ilium with gently convex dorsal surface; medial iliac flange long anteroposteriorly: postacetabular process curved downwards in lateral view. | |
R. J. Butler et al. 2008 | A postacetabular process of the ilium that is crescent-shaped and ventrally deflected. |
Measurements
No measurements are available
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Source: g = genus, o = order | |||||
References: Peczkis 1995, Marsh 1875 |
Age range: Maastrichtian or 72.10000 to 66.00000 Ma
Collections (2 total)
Time interval | Ma | Country or state | Original ID and collection number |
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Maastrichtian | Mongolia (Omnogov) | Homalocephale calathocercos (37019) Ornithischia indet. (type locality: 180473) |