bibo:journal"Zoological Journal of the Linnean Society";
bibo:pubDate"2023-07-25";
bibo:series"Zool. J. Linn. Soc.";
bibo:startPage"327";
bibo:volume"199";
dc:creator"Nesbiư, Sterling J.; Patellos, Emily; Kammerer, Christian F.; Ranivoharimanana, Lovasoa; Andre; Wyss, R.; Flynn, John J.";
dc:date"2023";
dc:title"The earliest-diverging avemetatarsalian: a new osteoderm- bearing taxon from the Triassic (? Earliest Late Triassic) of Madagascar and the composition of avemetatarsalian assemblages prior to the radiation of dinosaurs";
dc:description"Figure 1. Reconstruction of Mambachiton fiandohana, based on that of Teleocrater rhadinus (Nesbiư et al.2017). Light blue bones represent elements from the holotype and light red bones are from the referred material which we consider to be from the same individual. Scale bar = 25 cm.";
dc:description"Figure 2. Right postfrontal of the holotype of Mambachiton fiandohana (UA 8-25-97-132) in dorsal (A) and ventral (B) views. Arrow indicates anterior direction. Scale bar = 1 cm. Abbreviations: a., articulates with; fr, frontal; om, orbit margin; pa, parietal; stf, supratemporal fossa.";
dc:description"Figure 3. Articulated cervical vertebra and osteoderm series of Mambachiton fiandohana(UA 8-25-97-132) in right lateral view as a photograph (A), line drawing (B), and CT rendering model with the osteoderms and matrix removed (C). Grey shading in (B) indicates sandstone matrix.Arrow indicates anterior direction.Scale bar = 5 cm.Abbreviations:1st, first preserved cervical vertebra; 7th, seventh preserved cervical vertebra; cr, cervical rib; os, osteoderms.";
dc:description"Figure 4. Articulated cervical vertebra and osteoderm series of Mambachiton fiandohana (UA 8-25-97-132) in less lateral view as a photograph (A), line drawing (B), and CT rendering model with the osteoderms and matrix removed (C). Grey shading in (B) indicates sandstone matrix. Arrow indicates anterior direction. Scale bar = 5 cm. Abbreviations: 1st, first preserved cervical vertebra; 7th, seventh preserved cervical vertebra; cr, cervical rib; os, osteoderms.";
dc:description"Figure 6. Articulated cervical vertebra and osteoderm series of Mambachiton fiandohana (UA 8-25-97-132) in ventral view as a photograph (A), line drawing (B), and CT rendering model with the osteoderms and matrix removed (C). Grey shading in (B) indicates sandstone matrix. Arrow indicates anterior direction. Scale bar = 5 cm. Abbreviations: 1st, first preserved cervical vertebra; 7th, seventh preserved cervical vertebra; cr, cervical rib; os, osteoderms.";
dc:description"Figure 7. Anterior to middle cervical vertebrae of the holotype of Mambachiton fiandohana (UA 8-25-97-132). Second persevered cervical vertebra in less lateral (A), right lateral (B), anterior (C), posterior (D), ventral (E), and dorsal (F) views.Fourth persevered cervical vertebra in less lateral (G), right lateral (H), anterior (I), posterior (J), ventral (K), and dorsal (L) views. Colours of the vertebrae correspond to those in Figures 3–6. Arrows indicate anterior direction. Scale bars = 1 cm. Abbreviations: dia, diapophysis; ns, neural spine; par, parapophysis; pre, prezygapophysis; poz, postzygapophysis.";
dc:description"Figure 9. Digital reconstruction of the osteoderms of the holotype of Mambachiton fiandohana (UA 8-25-97-132). Both paramedian rows of osteoderms (alternating purple and red = right side; alternating pink and turquoise = less side) in dorsal (A) and ventral (B) views. Less paramedian row in lateral (C), dorsolateral (D), ventral (E), and medial (F) views.Isolated osteoderm from the less paramedial row in dorsolateral (G), lateral (H), medial (I), and ventral (J) views and isolated osteoderm from the right paramedial row in dorsolateral (K), lateral (L), medial (M), and ventral (N) views.Arrows indicate anterior direction. Scale bars = 5 in A–F and 1 cm in G–N. Abbreviations:ap, anterior process; gap, groove for anterior process.";
dc:description"Figure 10. Osteoderms and possible osteoderms of the holotype of Mambachiton fiandohana (UA 8-25-97-132). A, close up of the right paramedian osteoderms in lateral view.B, close up of the less paramedian osteoderms in lateral view. Three disarticulated less paramedian osteoderms in ventral (C) and medial (D) views.E, possible osteoderms.Isolated osteoderm with a unique morphology compared to the others in dorsal (F) and posterior (G) views. Arrows indicate anterior direction. Scale bars = 1 cm. Abbreviations: anl, anterior lamina; ap, anterior process; gap, groove for anterior process.";
dc:description"Figure 11. A, principal component analysis (PCA) of both less and right lateral cervical osteoderms of the holotype (UA 8-25-97-132). Grouping is based on general location of the osteoderms in the series:anterior, posterior, and central and correspond to the leưers (right side) and numbers (less side) of (C). B, lollipop diagram and wireframe graph for less lateral PC1, superimposed over osteoderm 1 in (C). Arrow indicates anterior direction.";
