Endocranial morphology of the petalichthyid placoderm Ellopetalichthys scheii from the Middle Devonian of Arctic Canada, with remarks on the inner ear and neck joint morphology of placoderms [PDF]
, 2020 Petalichthyid and “acanthothoracid” placoderms have taken pivotal positionsin the debate on placoderm—and, by extension, jawed vertebrate—relationships owing to perceived similarities with the jawless vertebrates.
Maria Grace Burton +15 more
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Endocast and bony labyrinth of a Devonian ‘placoderm’ challenges stem gnathostome phylogeny [PDF]
, 2021 Our understanding of the earliest evolution of jawed vertebrates depends on a credible phylogenetic framework for the jawed stem gnathostomes collectively known as ‘placoderms’.
Ahlberg, Per +15 more
core +1 more source
Известия высших учебных заведений: Геология и разведка, 2015 The stratigraphic distribution of antiarch remains in the Middle-Upper Devonian of central, southern and east-south regions of East European Platform (EEP), western slope of South Urals and Siberia are analyzed.
S. V. Moloshnikov
doaj +1 more source
An examination of the Devonian fishes of Michigan [PDF]
PeerJ, 2018 We surveyed the taxa, ecosystems, and localities of the Devonian fishes of Michigan to provide a framework for renewed study, to learn about the diversity and number of these fishes, and to investigate their connection to other North American faunas ...
Jack Stack, Lauren Sallan
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Neurocranial anatomy of three unusual placoderms revealed by computed tomography scanning, and their implications for early gnathostomes evolution [PDF]
, 2018 Placoderms are the only known stem-group jawed vertebrates with jaws and their phylogenetic relationships have become central to the question of how gnathostomes evolved.
Castiello, Marco
core +1 more source
, 2023 Jensen et al. (1) question evidence presented of a chambered heart within placoderms, citing its small size and apparently ventral atrium. However, they fail to note the belly-up orientation of the placoderm within one nodule, and the variability of ...
Paul Tafforeau +25 more
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Early Devonian fish material from Posongchong Formation of Guangnan, Yunnan, China [PDF]
古脊椎动物学报 (中英文版)New findings of early vertebrates, including placoderms, sarcopterygians, and the galeaspids Sanqiaspis rostrata, Macrothyraspis longicornis, Gantarostraspis gengi, Wenshanaspis sp., are described from Posongchong Formation (Pragian, Lower Devonian) in ...
XIAN Zu-Min, MO Xiong, GUAN Qi, ZHAO Ying-Tian, XUE Qin-Yuan, LI Qiang, LIU Jun-Ping, ZHU Min
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Fossil fishes from china provide first evidence of dermal pelvic girdles in osteichthyans. [PDF]
PLoS ONE, 2012 BACKGROUND: The pectoral and pelvic girdles support paired fins and limbs, and have transformed significantly in the diversification of gnathostomes or jawed vertebrates (including osteichthyans, chondrichthyans, acanthodians and placoderms).
Min Zhu +7 more
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A large Late Devonian arthrodire (Vertebrata, Placodermi) from Poland [PDF]
Estonian Journal of Earth Sciences, 2018 The arthrodire placoderm, Dunkleosteus sp., is reported from the Upper Devonian (Frasnian) of the Holy Cross Mountains, Poland. The material comprises partially preserved remains of two individuals found in the Kellwasser-like horizon of the Płucki ...
Piotr Szrek, Olga Wilk
doaj +1 more source