Results 21 to 30 of about 1,128 (190)
Re-make, re-model: evolution and development of vertebrate cranial lateral lines. [PDF]
Biol Rev Camb Philos SocABSTRACT Lateral lines are placodally derived mechanosensory systems on the heads and trunks of many aquatic vertebrates. There is evidence of lateral lines in the earliest known vertebrate fossils, and they exist in organisms with widely different craniofacial morphologies – including the presence or absence of jaws, external or internal nostrils, and
Venkataraman V +3 more
europepmc +2 more sources
Revision of asterolepidoid antiarch remains from the Ogre Formation (Upper Devonian) of Latvia [PDF]
Estonian Journal of Earth Sciences, 2020 The Frasnian (Upper Devonian) antiarch Walterilepis speciosa was first described in 1933 (as Taeniolepis) on the basis of a single specimen. The newly collected material has allowed the head to be described in a more detail, especially the nuchal and ...
Ervīns Lukševičs
doaj +1 more source
A new Lower Devonian arthrodire (Placodermi) from the NW Siberian Platform [PDF]
Estonian Journal of Earth Sciences, 2013 A new genus and species of arthrodires, Eukaia elongata (Actinolepidoidei, Placodermi), is described from the Lower Devonian, ?Pragian of the Turukhansk region, NW Siberian Platform.
Elga Mark-Kurik
doaj +1 more source
Acta Palaeontologica Polonica, 2023 Sarcopterygian remains are relatively common in the so-called “Placoderm Sandstone” (storm-origin bone-bearing breccia) from the Emsian (Lower Devonian) of Podłazie in the Holy Cross Mountains (Poland).
OLGA WILK
doaj +1 more source
Placoderm muscles and chordate interrelationships [PDF]
Biology Letters, 2007 [Trinajstic et al. (2007)][1] reported exceptionally preserved soft tissues in two placoderm fish from the Devonian of Australia. This exciting finding presents fresh morphological data with a bearing on an old phylogenetic problem: deep branching structure within the vertebrate tree.
Friedman, M, Brazeau, M, Brazeau, M
openaire +3 more sources
<i>Vampyrella crystallifera</i> sp. nov., an Amoeba That Dissolves Entire Algal Cells at a Remarkable Speed. [PDF]
Ecol EvolThe new vampyrellid amoeba Vampyrella crystallifera inhabits wet Sphagnum plants in temperate moorlands. Unlike its congeners, it engulfs entire algal cells and breaks them down at a fascinating speed. This represents a feeding habit that was unexpected for the genus Vampyrella and showcases the exceptional diversity of predator–prey interactions found
Suthaus A, Hess S.
europepmc +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 +1 more source
The relationship of placoderms [PDF]
Journal of Vertebrate Paleontology, 1984 ABSTRACT A review of the evidence suggests that placoderms are more closely related to osteichthyans than chondrichthyans. A new phylogeny of placoderms is proposed in which the ptyctodonts are considered the collateral descendants of all other placoderms.
Long, J. +11 more
openaire +5 more sources
Loss in the making: absence of pelvic fins and presence of paedomorphic pelvic girdles in a Late Devonian antiarch placoderm (jawed stem-gnathostome) [PDF]
Biology Letters, 2018 France Charest +2 more
exaly +2 more sources
Endochondral bone in an Early Devonian ‘placoderm’ from Mongolia [PDF]
Nature Ecology & Evolution, 2020 Endochondral bone is the main internal skeletal tissue of nearly all osteichthyans—the group comprising more than 60,000 living species of bony fishes and tetrapods. Chondrichthyans (sharks and their kin) are the living sister group of osteichthyans and have cartilaginous endoskeletons, long considered the ancestral condition for all jawed vertebrates (
Martin D. Brazeau +8 more
openaire +8 more sources