holotype

Reconstruction of the Bravoceratops skeleton with known bones marked in white. Specimen: TMM 46015-1 (holotype). Scale bar=2 m. Total length along centra=6.97 m.

Ornithischian dinosaur Stenopelix valdensis Meyer, 1857, holotype (GZG 741/2, formerly GPI Gö 741−2), from the Obernkirchen Sandstone (Early Cretaceous: Berriasian), near Bückeburg, Niedersachsen, Germany. A. Large sandstone slab. B. Interpretative outline drawing of large latex cast (prepared from large sandstone slab), showing majority of postcranial skeleton in dorsal view. C. Small sandstone slab. D. Interpretative outline drawing of small la− tex cast (prepared from small sandstone slab), showing sacrum and caudals, pelvic region and partial hindlimbs in ventral view. For clarity elements in and around the sacral region have not been labelled—these areas are shown in greater detail in Fig. 3. Roman numerals II–IV correspond to respective digits. Abbreviations: mt, metatarsals; f, femur; ?, unidentified element.

Hualianceratops holotype IVVP V18641, Skull reconstruction

Figure 1: Holotype and skeletal reconstruction of Mosaiceratops azumai, gen. et sp. nov (ZMNH M8856). (a) photograph and line drawing of ZMNH M8856; (b) skeletal reconstruction showing preserved elements in white. Scale bar 10 cm. Abbreviations: a, astragalus; boc, basioccipital; c, calcaneum; cav, caudal vertebra; ch, chevron; cv, cervical vertebra; dr, dorsal rib; dv, dorsal vertebra; f, frontal; fem, femur; fl, fibula; h, humerus; il, ilium; is, ischium; L, left; mt, metatarsal; ph, phalanx/phalanges; po, postorbital; R, right; sk, skull; sq, squamosal; t, tibia; td, tendon; ?, undiagnostic remains.

Skeletal diagram featuring the optimal remains of the holotype of Graciliceratops mongoliensis: ZPAL MgD-I/156.[1] Found in the Bayan Shireh Formation, in the original description the remains were referred to the genus Microceratops (now obsolete).[2] However, Sereno in 2000 noted that there was no base for this referral, then, he created a new genus and species for this specimen.[1] The holotype is very fragmented (specially the skull), consisting of:[2] Fragmented skull; 4 cervical, 12 dorsal and 7 sacral vertebrae; right scapula; proximal end of left scapula; left coracoid; right humerus, radius and fragmentary ulna; proximal and distal end of left humerus; proximal fragments of both pubis; fragments of both illium and fragment of right ischium; right femur, tibia and nearly complete pes; distal part of left tibia, fragmentary left pes; tarsals and isolated ribs.[2] The sacral vertebrae are not fused, an indicator of the immaturity of this specimen; the estimated adult size is about 2 meters long or similar to Protoceratops.[2][1] Right quadratojugal, quadrate and fragmentary jugal were reversed in order to get an optimal view.

Holotype of Ferrisaurus sustutensis, RBCM P900, on display in the Okanagan Heritage Museum exhibition Dinosaurs of BC, June-September 2024.

Holotype of Ischioceratops zhuchengensis (ZCDM V0016) in right lateral view. Photograph (A), drawing (B) and reconstruction of holotype individual (C). Abbreviations: cv, caudal vertebrae; lil, left ilium; ot, ossified tendons; rfem, right femur; rfib, right fibula; ril, right ilium; ris, right ischium; rtib, right tibia.

Holotype skull of Wannanosaurus yansiensis on display at the Paleozoological Museum of China.

Holotype dome of Acrotholus on display at the Royal Ontarion Museum, Toronto

Diagram featuring the holotype skull (ZPAL MgD-I/105) of Tylocephale gilmorei in left lateral view. Scale bar equals 5 cm (50 mm). Based on Maryańska & Osmólska, 1974,[1] and Sullivan, 2006.[2] References ↑ (1974). "Pachycephalosauria, a new suborder of ornithischian dinosaurs". Palaeontologica Polonica (30): 45−102. ↑ (2006). "A taxonomic review of the Pachycephalosauridae (Dinosauria: Ornithischia)". New Mexico Museum of Natural History and Science Bulletin (35): 347–365.

Holotype of Transylvanosaurus platycephalus, LPB (FGGUB) R.2070, a partial skull comprising the articulated basicranium and both frontals. Scale bar: 1 cm.

Holotype (MTM V 2009.192.1) of Ajkaceratops kozmai .mw-parser-output .smallcaps{font-variant:small-caps}Ősi et al., 2010 (Dinosauria: Ceratopsia), fused rostral and premaxillae, in lateral view, length of scale bar = 1 cm.

Figure 1 Right maxilla of Matheronodon provincialis gen. et sp. nov. (MMS/VBN-02–102; holotype) in dorsal (a), lateral (b), medial (c), and ventral (d) views. (e) Close-up of the second and third maxillary crowns.

DMNH 2021-05-02, holotype left dentary of Ampelognathus coheni, photos and labeled outline drawings in A, lateral; B, medial; C, dorsal; D, ventral; E, anterior; and F, posterior views. Abbreviations: a#, alveolus and numerical position in tooth row; anf, angular facet; cof, coronoid facet; cop, coronoid process; d6, dentary tooth 6 base; ds, dentary symphysis; mc, Meckelian canal; mg, Meckelian groove; pdd, dorsal facet for predentary; pdv, ventral facet for predentary; saf, surangular facet. Gray fill indicates recessed surfaces. Stippling indicates visible sediment. Cross-hatching indicates broken bone surface. Scale bars equal 5 mm.

Trinisaura skeletal diagram with the remains of the holotype

Photograph of the right dentary of the holotype (MQ98-II-1) of the hadrosauroid Portellsaurus sosbaynati (Santos-Cubedo et al., 2021). A is the labial view; B is the lingual view; C is the occlusal view; D is a 2x enlargement. Scale bars equal 10 centimetres.