Results 71 to 80 of about 717 (179)

The evolutionary origins of streptophyte multicellularity

New Phytologist, Volume 251, Issue 5, Page 2365-2383, September 2026.
The phylogeny of streptophytes and the deep origin of branching filamentous growth. Summary Over their more than 1 billion years of evolutionary history, streptophytes have repeatedly transitioned between unicellular, simple multicellular and complex multicellular forms.
Tatyana Darienko, Cäcilia F. Kunz, Elisa S. Goldbecker, Erika Endriulaitytė, Maaike J. Bierenbroodspot, Maike Lorenz, Iker Irisarri, Thomas Pröschold, Katharina Bürstenbinder, Henrik Buschmann, Jan de Vries   +10 more
wiley   +1 more source

Phylogenetically‐informed estimates of notosuchian (Archosauria, Crocodylomorpha) body size and the challenges of inferring macroevolutionary patterns in extinct groups

Palaeontology, Volume 69, Issue 3, 2026.
Abstract Notosuchian crocodylomorphs were predominantly active terrestrial predators, exhibiting a wide range of ecomorphological specializations and body sizes. Given that body size plays an important role in the life history of vertebrates, its accurate estimation for notosuchians is crucial for understanding macroevolutionary and macroecological ...
Ana Laura S. Paiva, Pedro L. Godoy, Daniel M. dos Santos, Max C. Langer, Philip D. Mannion   +4 more
wiley   +1 more source

The relationships of antiarchs (Devonian placoderm fishes)—evidence supporting placoderm monophyly

Journal of Vertebrate Paleontology, 2008
A recent analysis of the vascularization of the pectoral fin in antiarchs indicated that they resembled jawless osteostracans rather than other jawed vertebrates, thereby challenging the monophyly of the class Placodermi. Examination of the evidence proposed to support this new hypothesis shows misinterpretation of well-established morphology in a ...
openaire   +1 more source

Synapsids and sensitivity: Broad survey of tetrapod trigeminal canal morphology supports an evolutionary trend of increasing facial tactile specialization in the mammal lineage

The Anatomical Record, Volume 309, Issue 4, Page 864-911, April 2026.
Abstract The trigeminus nerve (cranial nerve V) is a large and significant conduit of sensory information from the face to the brain, with its three branches extending over the head to innervate a wide variety of integumentary sensory receptors, primarily tactile.
Juri A. Miyamae, Julien Benoit, Irina Ruf, Zoleka Sibiya, Bhart‐Anjan S. Bhullar   +4 more
wiley   +1 more source

The lower jaw of Devonian ray‐finned fishes (Actinopterygii): Anatomy, relationships, and functional morphology

The Anatomical Record, Volume 309, Issue 3, Page 550-602, March 2026.
Abstract Actinopterygii is a major extant vertebrate group, but limited data are available for its earliest members. Here we investigate the morphology of Devonian actinopterygians, focusing on the lower jaw. We use X‐ray computed tomography (XCT) to provide comprehensive descriptions of the mandibles of 19 species, which span the whole of the Devonian
Ben Igielman, Rodrigo Tinoco Figueroa, Robert R. Higgins, Stephanie E. Pierce, Michael I. Coates, Emily M. Troyer, Vincent Fernandez, Kathleen Dollman, Jing Lu, Min Zhu, Matt Friedman, Sam Giles   +11 more
wiley   +1 more source

Groenlandaspidid placoderm fishes from the Late Devonian of North America [PDF]

Records of the Australian Museum, 2003
Two new taxa of groenlandaspidid fish (Placodermi: Arthrodira) from non-marine deposits of the Catskill Formation (Upper Devonian) at Red Hill, Clinton County, Pennsylvania, USA, are the first to be described from North America outside of Greenland. Groenlandaspis pennsylvanica n.sp.
Daeschler, Edward B., Frumes, Anna C., Mullison, C. Frederick   +2 more
openaire   +1 more source

The Dermal Skeleton of Stem‐Actinopterygian Moythomasia durgaringa and Its Implications for the Nature of the Ancestral Osteichthyan

Journal of Morphology, Volume 287, Issue 3, March 2026.
The figure presents a model of Moythomasia and a schematic histological model illustrating the internal structure and features of the cranial bones. These include bone (brown), osteocyte spaces (red), spheritic bone (light brown), osteon spaces (orange), dentine and canaliculi (green), pulp canal (yellow), ganoine (gray), arrested growth lines (dashed ...
Xianren Shan, Edine Pape, Joseph N. Keating, Martin Rücklin, Davide Pisani, Philip C. J. Donoghue   +5 more
wiley   +1 more source

The Synarcual of the Little Skate, Leucoraja erinacea: Novel Development Among the Vertebrates

Frontiers in Ecology and Evolution, 2019
Evolutionary variation in anteroposterior patterning of the axial skeleton is a major contributor to the evolution of the vertebrate body plan, with five canonical vertebral types in tetrapods (cervical, thoracic, lumbar, sacral, caudal).
Zerina Johanson, Kyle Martin, Gareth Fraser, Katherine James   +3 more
doaj   +1 more source

Vascularization and odontode structure of a dorsal ridge spine of Romundina stellina Ørvig 1975. [PDF]

PLoS ONE, 2017
There are two types of dermal skeletons in jawed vertebrates: placoderms and osteichthyans carry large bony plates (macromery), whereas chondrichthyans and acanthodians are covered by small scales (micromery).
Anna Jerve, Qingming Qu, Sophie Sanchez, Per Erik Ahlberg, Tatjana Haitina   +4 more
doaj   +1 more source

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.
Rucklin, Martin, Donoghue, Philip C J
core   +1 more source