Results 21 to 30 of about 1,039 (132)

Tell Us a Story Granddad: Age and Origin of an Iconic Australian Lungfish

Frontiers in Environmental Science, 2022
The modern discovery of the Australian lungfish (Neoceratodus forsteri) by European settlers in 1870 was considered one of the most important events in natural history by leading international scientists and naturalists of that time.
Benjamin Mayne, Tom Espinoza, David Roberts   +2 more
doaj   +1 more source

How big can a walking fish be? A theoretical inference based on observations on four land‐dwelling fish genera of South Vietnam

Integrative Zoology, Volume 17, Issue 5, Page 849-878, September 2022., 2022
Modern amphibiotic fishes use various walking techniques but are smaller in length than half a meter, whereas extinct tetrapodomorph fishes of Devonian ranged from 0.5 to 2.5 m. Could they walk out of water, and how did they walk if they could? This study argues that, in recent ichthyofauna, snakehead is most appropriate for modeling walking technique ...
Alexander N. KUZNETSOV
wiley   +1 more source

Whole‐body endothermy: ancient, homologous and widespread among the ancestors of mammals, birds and crocodylians

Biological Reviews, Volume 97, Issue 2, Page 766-801, April 2022., 2022
ABSTRACT The whole‐body (tachymetabolic) endothermy seen in modern birds and mammals is long held to have evolved independently in each group, a reasonable assumption when it was believed that its earliest appearances in birds and mammals arose many millions of years apart.
Gordon Grigg, Julia Nowack, José Eduardo Pereira Wilken Bicudo, Naresh Chandra Bal, Holly N. Woodward, Roger S. Seymour   +5 more
wiley   +1 more source

The conundrum of pharyngeal teeth origin: the role of germ layers, pouches, and gill slits

Biological Reviews, Volume 97, Issue 1, Page 414-447, February 2022., 2022
ABSTRACT There are several competing hypotheses on tooth origins, with discussions eventually settling in favour of an ‘outside‐in’ scenario, in which internal odontodes (teeth) derived from external odontodes (skin denticles) in jawless vertebrates. The evolution of oral teeth from skin denticles can be intuitively understood from their location at ...
Ann Huysseune, Robert Cerny, P. Eckhard Witten   +2 more
wiley   +1 more source

Expression of meis and hoxa11 in dipnoan and teleost fins provides new insights into the evolution of vertebrate appendages

EvoDevo, 2018
Background The concerted activity of Meis and Hoxa11 transcription factors is essential for the subdivision of tetrapod limbs into proximo-distal (PD) domains; however, little is know about the evolution of this patterning mechanism.
Fernanda Langellotto, Maria Fiorentino, Elena De Felice, Luigi Caputi, Valeria Nittoli, Jean M. P. Joss, Paolo Sordino   +6 more
doaj   +1 more source

The “mid”-Cretaceous (Lower Cenomanian) Continental Vertebrates of Gara Samani, Algeria. Sedimentological Framework and Palaeodiversity

Frontiers in Earth Science, 2022
Excellent outcrops of the upper part of the “Continental Intercalaire” deposits occur in the Gara Samani area, southern Algeria. These strata are recognised herein as belonging to the Gara Samani Formation, which is composed of the Samani Vertebrate-rich
Madani Benyoucef, Adán Pérez-García, Mohamed Bendella, Francisco Ortega, Romain Vullo, Imad Bouchemla, Bruno Ferré   +6 more
doaj   +1 more source

Using the swimbladder as a respiratory organ and/or a buoyancy structure—Benefits and consequences

Journal of Experimental Zoology Part A: Ecological and Integrative Physiology, Volume 335, Issue 9-10, Page 831-842, November 1, 2021., 2021
Graphical abstract Abstract A swimbladder is a special organ present in several orders of Actinopterygians. As a gas‐filled cavity it contributes to a reduction in overall density, but on descend from the water surface its contribution as a buoyancy device is very limited because the swimbladder is compressed by increasing hydrostatic pressure.
Bernd Pelster
wiley   +1 more source

The vitellogenin genes in Cynops orientalis: New insights on the evolution of the vtg gene family in amphibians

Journal of Experimental Zoology Part B: Molecular and Developmental Evolution, Volume 336, Issue 7, Page 554-561, November 2021., 2021
For the first time, the vtgI gene, absent in anurans, was characterized in caecilians and urodeles (Panel a). The different expression levels of vtg genes in female liver transcriptomes of Cynops orientalis suggested different functions (Panel b).
Federica Carducci, Maria A. Biscotti, Adriana Canapa, Marco Barucca   +3 more
wiley   +1 more source

Pitfalls and windfalls of detecting demographic declines using population genetics in long-lived species. [PDF]

Evol Appl
Abstract Detecting recent demographic changes is a crucial component of species conservation and management, as many natural populations face declines due to anthropogenic habitat alteration and climate change. Genetic methods allow researchers to detect changes in effective population size (Ne) from sampling at a single timepoint.
Clark MI, Fitzpatrick SW, Bradburd GS.
europepmc   +2 more sources

Developmental Endocrinology of the Dipnoan,Neoceratodus forsteri [PDF]

American Zoologist, 1997
The development of the pineal, pituitary and thyroid glands of the extant lungfish, Neoceratodus forsteri , are being studied both morphologically and functionally. This paper presents data from hatching to 40–52 weeks for a standardised series of lungfish, bred at Macquarie University.
JEAN M. P. JOSS, P. SYLVIA RAJASEKAR, R. ASHNI RAJ-PRASAD, KIRSTY RUITENBERG   +3 more
openaire   +1 more source