Results 21 to 30 of about 126 (64)

(Arthrodira: Heterostiidae) from the Lower Devonian of China, and the interrelationships of Brachythoraci

, 2015
Figure 10. The timing of brachythoracid evolution in the Devonian period, based on the phylogeny in Figure 9. Sil, Silurian; Pri, Pridoli; Loc, Lochkovian; Pra, Pragian; Eif, Eifelian; Giv, Givetian; mya, million years.
Wang, Jun-Qing, Min Zhu, Zhu, Min, Jun-Qing Wang, Zhu, You-An, You-An Zhu   +5 more
core   +1 more source

FIG. 2. — Atlantidosteus pacifica n in A new species of Atlantidosteus Lelièvre, 1984 (Placodermi, Arthrodira, Brachythoraci) from the Middle Devonian of the Broken River area (Queensland, Australia)

, 2003
FIG. 2. — Atlantidosteus pacifica n. sp., holotype (ANU V1033), a right suborbital plate from the cheek in external (A) and internal (B) views (acid prepared specimen coated with ammonium chloride sublimate).
Young, Gavin C.
core   +1 more source

Revision of the genusKujdanowiaspisStensiö, 1942 (Placodermi, Arthrodira, “Actinolepida”) from the Lower Devonian of Podolia (Ukraine)

, 2010
FIG. 14. — Heightingtonaspis anglica (Traquair, 1890b): A, B, silicone casts of the external side of a skull roof; A, NHM P 38032: B, NHM P 42147; C, incomplete skull roof (internal side), NHM P 27190 (White 1969: pl. II, fig.
Dupret, Vincent, Dupret, Vincent,, Vincent Dupret   +2 more
core   +1 more source

Figure 7 in A redescription of Kiangyousteus yohii (Arthrodira: Eubrachythoraci) from the Middle Devonian of China, with remarks on the systematics of the Eubrachythoraci

, 2013
Figure 7. Kiangyousteus yohii. Right anterior lateral plate (IVPP801.2) in A, lateral, B, visceral, and C, anterior views, detailing the denticulated area of postbranchial lamina. Abbreviations: ADL.cf, contact face for anterior dorsolateral plate; em.pb,
Zhu, Min, Zhu, You-An
core   +1 more source

Investigating the Morphogenesis and Replacement of Lamprey Toothlets Using Synchrotron Imaging

Journal of Morphology, Volume 286, Issue 10, October 2025.
Toothlet replacement is a conserved feature in lampreys. We describe the mechanism at tissue level and quantify the determining factors, thus providing the basis for studies into a deep homology of cyclostome toothlets and gnathostome teeth. ABSTRACT Teeth are a key innovation that underpinned the adaptive radiation of jawed vertebrates; however, their
Madleen Grohganz, Jake Leyhr, Zerina Johanson, Tatjana Haitina, Sophie Sanchez, Kathleen Dollman, Jan Stundl, Marianne E. Bronner, Gareth J. Fraser, Philip C. J. Donoghue   +9 more
wiley   +1 more source

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

Paleo‐evo‐devo implications of a revised conceptualization of enameloids and enamels

Biological Reviews, Volume 100, Issue 3, Page 1047-1066, June 2025.
ABSTRACT Understanding the origin and evolution of the mineralized skeleton is crucial for unravelling vertebrate history. However, several limitations hamper our progress. The first obstacle is the lack of uniformity and clarity in the literature for the definition of the tissues of concern, especially of enameloid(s) and enamel(s), resulting in ...
Guillaume Houée, Nicolas Goudemand, Damien Germain, Jérémie Bardin   +3 more
wiley   +1 more source

Figure 1. Dinichthys herzeri. A, AMNH 81 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 1. Dinichthys herzeri. A, AMNH 81 (holotype), incomplete nuchal plate in internal view. B, AMNH 73 (paratype), left inferognathal plate in lateral view. C, AMNH 34, left anterior superognathal in lateral view.
Carr, Robert K., Hlavin, William J.
core   +1 more source

Cautionary tales on the use of proxies to estimate body size and form of extinct animals

Ecology and Evolution, Volume 14, Issue 9, September 2024.
Reconstructing the body size and form of extinct animals is of vital importance to our understanding of macroevolution and palaeontology. This is often done using anatomical proxies where extinct species are known only from fragmentary remains. However, there are many limitations influencing the selection of proxy taxa that are frequently overlooked ...
Joel H. Gayford, Russell K. Engelman, Phillip C. Sternes, Wayne M. Itano, Mohamad Bazzi, Alberto Collareta, Rodolfo Salas‐Gismondi, Kenshu Shimada   +7 more
wiley   +1 more source

Figure 8 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 8. Dorsal view of a generalized eubrachythoracid arthrodire skull roof, presented as a flattened image. The measurements (a, b, and c) used in the length ratios (r1 and r2) of characters 92 and 93 are indicated: r1 (character 92) = b/c; r2 ...
Carr, Robert K., Hlavin, William J.
core   +1 more source