Results 11 to 20 of about 1,025 (146)

A new odontocete (Inioidea, Odontoceti) from the late Neogene of North Carolina, USA [PDF]

open access: yesFossil Record, 2021
A new monotypic genus of Neogene odontocete (Isoninia borealis) is named on the basis of a partial skull (CMM-V-4061). The holotype was found on the riverbed of the Meherrin River (North Carolina, USA) and probably originated from the Miocene marine ...
S. J. Godfrey   +6 more
doaj   +1 more source

Middle ear innovation in Early Cretaceous eutherian mammals

open access: yesNature Communications, 2023
The middle ear ossicles in modern mammals are repurposed from postdentary bones in non-mammalian cynodonts. Recent discoveries by palaeontological and embryonic studies have developed different models for the middle ear evolution in mammaliaforms ...
Haibing Wang, Yuanqing Wang
doaj   +1 more source

Do Not Lose Your Head over the Unequal Regeneration Capacity in Prolecithophoran Flatworms

open access: yesBiology, 2022
One of the central questions in studying the evolution of regeneration in flatworms remains whether the ancestral flatworm was able to regenerate all body parts, including the head.
Alexandra L. Grosbusch   +4 more
doaj   +1 more source

New craniodental remains of Thylacinus potens (Dasyuromorphia: Thylacinidae), a carnivorous marsupial from the late Miocene Alcoota Local Fauna of central Australia [PDF]

open access: yesPeerJ, 2014
New craniodental specimens that are referrable to the thylacinid marsupial, Thylacinus potens, are described from the late Miocene Alcoota Local Fauna of the Northern Territory, Australia.
Adam M. Yates
doaj   +2 more sources

Identifying Complex DNA Contamination in Pig-Footed Bandicoots Helps to Clarify an Anomalous Ecological Transition

open access: yesDiversity, 2022
Our understanding of the biology of the extinct pig-footed bandicoots (Chaeropus) has been substantially revised over the past two decades by both molecular and morphological research. Resolving the systematic and temporal contexts of Chaeropus evolution
Matthew J. Phillips   +2 more
doaj   +1 more source

The Diverse Iron Distribution in Eudicotyledoneae Seeds: From Arabidopsis to Quinoa

open access: yesFrontiers in Plant Science, 2019
Seeds accumulate iron during embryo maturation stages of embryogenesis. Using Arabidopsis thaliana as model plant, it has been described that mature embryos accumulate iron within a specific cell layer, the endodermis.
Miguel Angel Ibeas   +11 more
doaj   +1 more source

Significance of some previously unrecognized apomorphies in the nasal region of Homo neanderthalensis. [PDF]

open access: yesProceedings of the National Academy of Sciences, 1996
For many years, the Neanderthals have been recognized as a distinctive extinct hominid group that occupied Europe and western Asia between about 200,000 and 30,000 years ago. It is still debated, however, whether these hominids belong in their own species, Homo neanderthalensis, or represent an extinct variant of Homo sapiens.
J H, Schwartz, I, Tattersall
openaire   +2 more sources

The cranial anatomy and relationships of Cardiocorax mukulu (Plesiosauria: Elasmosauridae) from Bentiaba, Angola.

open access: yesPLoS ONE, 2021
We report a new specimen of the plesiosaur Cardiocorax mukulu that includes the most complete plesiosaur skull from sub-Saharan Africa. The well-preserved three-dimensional nature of the skull offers rare insight into the cranial anatomy of elasmosaurid ...
Miguel P Marx   +5 more
doaj   +1 more source

The female genitalia of the genus Zabrus (Coleoptera: Carabidae: Zabrini). I. The general structure and the subgenera Zabrus, Euryzabrus, Platyzabrus and Epomidozabrus.

open access: yesEuropean Journal of Entomology, 2003
The systematics of the genus Zabrus Clairville, 1806 is currently based on morphological characters that show a high degree of parallelism. The aim of this study is to find new characters in the female genitalia, which give a better understanding of the ...
Vicente M. ORTUÑO   +3 more
doaj   +1 more source

A phylogenomic approach to reconstruct interrelationships of main clupeocephalan lineages with a critical discussion of morphological apomorphies [PDF]

open access: yesBMC Evolutionary Biology, 2018
Previous molecular studies on the phylogeny and classification of clupeocephalan fishes revealed numerous new taxonomic entities. For re-analysing these taxa, we perform target gene capturing and subsequent next generation sequencing of putative ortholog exons of major clupeocephalan lineages.
Nicolas Straube   +4 more
openaire   +3 more sources

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