Results 41 to 50 of about 1,690 (206)
Romundina and the evolutionary origin of teeth [PDF]
, 2015 Theories on the origin of vertebrate teeth have long focused on chondrichthyans as reflecting a primitive condition—but this is better informed by the extinct placoderms, which constitute a sister clade or grade to the living gnathostomes.
Donoghue, Philip C J, Rucklin, Martin
core +2 more sources
Sedimentology, Volume 70, Issue 5, Page 1413-1471, August 2023., 2023 ABSTRACT The study examines bioclastic carbonate contourites that arise from the broad spectrum of bottom‐current related sedimentary processes ranging from deposition to erosion. The result of the intermittent accumulation of sediment are thin and condensed successions with abundant hiatuses.
Heiko Hüneke +9 more
wiley +1 more source
Canadian journal of earth sciences (Print), 2020 Petalichthyid and “acanthothoracid” placoderms have taken pivotal positions in the debate on placoderm — and, by extension, jawed vertebrate — relationships owing to perceived similarities with certain jawless vertebrates.
Marco Castiello +4 more
semanticscholar +1 more source
First articulated phyllolepid placoderm from North America, with comments on phyllolepid systematics [PDF]
, 2013 Copyright 2013 The Academy of Natural Sciences of Philadelphia. Published version of the paper reproduced here with permission from the publisher.The first articulated phyllolepid placoderm from North America (outside of Greenland) is described from the ...
Daeschler, EB, Long, John A
core +1 more source
The Hunsrück Slate Konservat‐Lagerstätte
Geology Today, Volume 39, Issue 2, Page 72-76, March/April 2023., 2023 The Lower Devonian Hunsrück Slate in western Germany is world‐famous for its exceptionally preserved and beautiful fossils. What makes this Konservat‐Lagerstätte so fascinating is its unique style of pyritization that has perfectly captured an entire ecosystem, from delicate echinoderms with preserved soft tissues to the Lovecraftian Mimetaster.
Jack T. R. Wilkin
wiley +1 more source
Известия высших учебных заведений: Геология и разведка, 2019 The fragment of the skull cap of placoderm Livnolepis heckeri (Luksevics) from the Bilovo Formation (Famennian, Upper Devonian) near the Bilovo Village of Tver Region has been described.
S. V. Moloshnikov, V. V. Linkevich
doaj +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
doaj +2 more sources
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
doaj +1 more source
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
doaj +1 more source