Results 11 to 20 of about 169 (124)

An antiarch placoderm shows that pelvic girdles arose at the root of jawed vertebrates [PDF]

Biology Letters, 2012
Almost all gnathostomes or jawed vertebrates (including osteichthyans, chondrichthyans, \u27acanthodians\u27 and most placoderms) possess paired pectoral and pelvic fins.
Min Zhu, Xiaobo Yu, Brian Choo
exaly   +5 more sources

Redescription of Phymolepis  cuifengshanensis (Antiarcha: Yunnanolepididae) using high-resolution computed tomography and new insights into anatomical details of the endocranium in antiarchs [PDF]

PeerJ, 2018
Background Yunnanolepidoids constitute either the most basal consecutive segments or the most primitive clade of antiarchs, a highly diversified jawed vertebrate group from the Silurian and Early Devonian periods.
Yajing Wang, Min Zhu
doaj   +5 more sources

Reappraisal of the Silurian placoderm Silurolepis and insights into the dermal neck joint evolution [PDF]

Royal Society Open Science, 2019
Silurolepis platydorsalis, a Silurian jawed vertebrate originally identified as an antiarch, is here redescribed as a maxillate placoderm close to Qilinyu and is anteroposteriorly reversed as opposed to the original description.
You-an Zhu, Jing Lu, Min Zhu
doaj   +3 more sources

Early Gnathostome Phylogeny Revisited: Multiple Method Consensus. [PDF]

PLoS ONE, 2016
A series of recent studies recovered consistent phylogenetic scenarios of jawed vertebrates, such as the paraphyly of placoderms with respect to crown gnathostomes, and antiarchs as the sister group of all other jawed vertebrates.
Tuo Qiao, Benedict King, John A Long, Per E Ahlberg, Min Zhu   +4 more
doaj   +3 more sources

Bothriolepiform antiarchs (Pisces, Placodermi) from the devonian of Central Kazakhstan

Paleontological Journal, 2011
Bothriolepiform antiarchs (Placodermi, Antiarchi) are represented by two genera in the Devonian of Central Kazakhstan: Bothriolepis Eichwald (Bothriolepididae) and Tenizolepis Malinovskaja (Dianolepididae). The first includes five species: B. babichevi Malinovskaja, 1992, B. kassini Malinovskaja, 1988, B. amankonyrica Malinovskaja, 1988, B.
S V Moloshnikov, Moloshnikov S V
exaly   +3 more sources

SYSTEMATIC POSITION OF ANTIARCHS (VERTEBRATA, PLACODERMI) FROM THE FAMENNIAN OF TVER REGION, RUSSIA

Izvestiya Vysshikh Uchebnykh Zavedenii Geologiya I Razvedka, 2017
New materials of the placoderm fish Bothriolepis heckeri Luksеvics from the Famennian of the Bilovo locality (Tver Region) are studied. This species is very similar to Livnolepis zadonica (H.Obrucheva) in the structure of cranial and postcranial armours ...
S V Moloshnikov
exaly   +4 more sources

Squamation and scale morphology at the root of jawed vertebrates [PDF]

eLife, 2022
Placoderms, as the earliest branching jawed vertebrates, are crucial to understanding how the characters of crown gnathostomes comprising Chondrichthyes and Osteichthyes evolved from their stem relatives.
Yajing Wang, Min Zhu
doaj   +2 more sources

A new Early Devonian antiarch placoderm from Belarus, and the phylogeny of Asterolepidoidei [PDF]

Acta Palaeontologica Polonica, 2023
A new asterolepidoid antiarch, Sherbonaspis talimaae sp. nov., is described based on the disarticulated skeletal elements from several boreholes in Belarus, from the Lepel Beds of the Vitebsk Formation, which has been assigned to an Early Devonian, late ...
Dmitry P. Plax, Ervins Lukševičs
doaj   +3 more sources

Copulation in antiarch placoderms and the origin of gnathostome internal fertilisation [PDF]

Nature, 2014
Reproduction in jawed vertebrates (gnathostomes) involves either external or internal fertilization. It is commonly argued that internal fertilization can evolve from external, but not the reverse.
Trinajstic, K., Lee, Michael S.Y.,, Brian Choo, Kate Trinajstic, Johanson, Z., den Blaauwen, J., Long, John A, Zhu Min, Long, J., Ahlberg, P., Blaauwen, J., Michael Newman, Long, John A., John A. Long, Zerina Johanson, Ahlberg, Per, den Blaauwen, Jan L, Mark-Kurik, Elga,, Johanson, Zerina,, Young, Gavin C.,, Young, G., Choo, Brian, Trinajstic, Katherine, Young, Gavin, Min, Z., Gavin C. Young, Young, Gavin C., den Blaauwen, Jan,, Lee, M., Trinajstic, Kate, Trinajstic, Kate,, Jones, R., Young, Gavin C, Michael S. Y. Lee, Lee, Michael S. Y., Ahlberg, Per E, Choo, B., Per E. Ahlberg, Lee, Michael S Y, Min, Zhu, Johanson, Zerina, Mark-Kurik, Elga, Blaauwen, Jan den, Choo, Brian,, Long, John, Ahlberg, Per Erik,, Jan den Blaauwen, Zhu, Min,, Newman, Michael, Ahlberg, Per E., den Blaauwen, Jan, Roger Jones, Mark-Kurik, E., Jones, Roger, Newman, M., Elga Mark-Kurik, Long, John A.,   +56 more
core   +5 more sources

New information on the morphology of yunnanolepid antiarchs (Placoderm fishes) from the Early Devonian of South China

Journal of Vertebrate Paleontology, 1996
ABSTRACT Skull morphology is described from acid-prepared articulated specimens of the antiarch Phymolepis cuifenshanensis from the Early Devonian of Yunnan Province, South China. The nasal and circum-orbital bones have a similar structure to the advanced antiarch Bothriolepis, but with the nasal openings bounded laterally by the sclerotic ring ...
Gavin C Young
exaly   +3 more sources