Results 61 to 70 of about 327 (156)

Fusion, gene misexpression and homeotic transformations in vertebral development of the gnathostome stem group (Placodermi)

The International Journal of Developmental Biology, 2010
Development of the vertebral column is controlled by a complex of pleiotropic and polygenetic phenomena, in the mouse and chick regulating formation of different parts of individual vertebrae and morphological identity along the column (Hox code). In mouse and chick, experimental misexpression, including upstream and downstream genes, results in shifts
Zerina, Johanson, Robert, Carr, Alex, Ritchie   +2 more
openaire   +3 more sources

Première découverte d'un Arthrodire (Placodermi, Vertebrata) dans le Dévonien d'Amérique du Sud

, 1996
Des plaques dermiques d'un grand Arthrodire eubrachyhtoracide (Placodermi, Vertebrata), provisoirement attribuées à un Dunkleosteidae, ont été découvertes dans les faciès détritique de la Formation de Colpacucho (Famennien), sur la Péninsule de Cumana ...
Lelièvre, H., Suarez-Riglos, M., Janvier, P., Diaz Martinez, Enrique   +3 more
core  

Figure 2 in The morphology of Yujiangolepis liujingensis (Placodermi, Arthrodira) from the Pragian of Guangxi (south China) and its phylogenetic significance

, 2009
Figure 2. Subcomplete skull roof of Yujiangolepis liujingensis Wang et al., 1998 (holotype IVPP V 1957). A, photograph of the skull roof in dorsal view; B, magnification around right central and anterior paranuchal plates; C, interpretative sketch of the
Dupret, Vincent, Wang, Jun-Qing, Zhu, Min   +2 more
core   +1 more source

FIG. 3 in A new species of Atlantidosteus Lelièvre, 1984 (Placodermi, Arthrodira, Brachythoraci) from the Middle Devonian of the Broken River area (Queensland, Australia)

, 2003
FIG. 3. — Restoration of the right suborbital (SO) plate of Atlantidosteus pacifica n. sp.; A, external surface; B, internal surface; C, section through the suborbital lamina at the level indicated (arrow in B). Abbreviations: att.aup, attachment surface
Young, Gavin C.
core   +1 more source

FIG. 4 in A new species of Atlantidosteus Lelièvre, 1984 (Placodermi, Arthrodira, Brachythoraci) from the Middle Devonian of the Broken River area (Queensland, Australia)

, 2003
FIG. 4. — Homostius spp.; A, B, left suborbital plate (external and internal views); C-E, left postorbital plates, of H. arcticus Heintz, 1934 (C), H. latus Asmuss, 1856 (D) and H. milleri Traquair, 1888 (E). (Modified from Heintz 1934: figs 22, 23, 50).
Young, Gavin C.
core   +1 more source

Evolutionary analysis of swimming speed in early vertebrates challenges the 'New Head Hypothesis'. [PDF]

Commun Biol, 2022
Ferrón HG, Donoghue PCJ.
europepmc   +1 more source

Figure 2. Regional geography and stratigraphic relationships. A in Two new species of Dunkleosteus Lehman, 1956, from the Ohio Shale Formation (USA, Famennian) and the Kettle Point Formation (Canada, Upper Devonian), and a cladistic analysis of the Eubrachythoraci (Placodermi, Arthrodira)

, 2010
Figure 2. Regional geography and stratigraphic relationships. A, geography and depositional basins for the USA mid-continent (modified from Elliott et al., 2000). Fossil localities: 1, Dunkleosteus raveri sp. nov.
Carr, Robert K., Hlavin, William J.
core   +1 more source

New cranial material of the acanthothoracid placoderm Palaeacanthaspis vasta from the Lower Devonian of Podolia—phylogenetic and taxonomic significance [PDF]

Acta Palaeontologica Polonica, 2021
VINCENT DUPRET, HUBERT SZANIAWSKI, MAREK DEC, PIOTR SZREK   +3 more
doaj  

Increasing morphological disparity and decreasing optimality for jaw speed and strength during the radiation of jawed vertebrates. [PDF]

Sci Adv, 2022
Deakin WJ, Anderson PSL, den Boer W, Smith TJ, Smith TJ, Hill JJ, Rücklin M, Donoghue PCJ, Rayfield EJ.   +8 more
europepmc   +1 more source

Étude anatomique des genres Kujdanowiaspis Stensiö 1942 et Erikaspis nov. gen. (Placodermi Arthrodira " Actinolepida ") du Dévonien inférieur de Podolie (Ukraine) (Nouvelle proposition de la phylogénie des Arthrodira)

, 2003
Le statut phylogénétique des " Actinolepida " (Placodermi Arthrodira) demeurait ambigu. L'étude de matériel du Dévonien inférieur de Podolie (Ukraine) est prétexte à une analyse phylogénétique pour résoudre les relations de parenté entre les ...
DUPRET, Vincent, GOUJET, Daniel
core