Results 111 to 120 of about 236 (131)

New insights from network analysis on the biogeography of antiarchs (jawed stem-Gnathostomata)

Palaeoworld
Min Zhu
exaly   +2 more sources

Some additions to our knowledge of antiarchs

1961
(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
openaire   +1 more source

A new antiarch fish from the Upper Devonian Zhongning Formation of Ningxia, China

Palaeoworld, 2010
A new antiarch, Ningxialepis spinosa n. gen. n. sp., is described from the Zhongning Formation (Famennian, Late Devonian) of Shixiagou, Qingtongxia, Ningxia, northwestern China. It is characterized by the presence of X-shaped pit-lines, long obstantic margins, high dorsal median spine of the trunk armour formed from the anterior and posterior median ...
Lian-Tao Jia, Min Zhu, Wen-Jin Zhao
openaire   +1 more source

ON A RECONSTRUCTION OF THE OLFACTORY SYSTEM AND BRAIN IN ANTIARCHS (PISCES: PLACODERMI)

The Life of the Earth
The position of the nasal sacs and nostrils, as well as some features of the brain structure in antiarchs (placoderm fishes) are analyzed, based mainly on the examples of Bothriolepis and Asterolepis. A new possible reconstruction of the olfactory system and brain in antiarchs is proposed.
exaly   +2 more sources

An asterolepidoid antiarch (placoderm fish) from the Early Devonian of the Georgina Basin, central Australia

Alcheringa, 1984
A small collection of well-preserved antiarch remains from the basal calcareous unit of the Cravens Peak Beds is described and figured. This represents the earliest record of antiarchs from the Australian continent. An Emsian age, based on correlations with the Mulga Downs Group in the Darling Basin, makes this the earliest recorded antiarch occurrence
exaly   +2 more sources

A multivariate analysis of measurements on the Scottish Middle Old Red Sandstone antiarch fish genus Pterichthyodes Bleeker

Biological Journal of the Linnean Society, 1972
A multivariate statistical analysis, using both discriminatory procedures on canonical axes and factor analysis was used to determine if there was any separation into different morphological types corresponding to the ostensible species of the Scottish antiarch Pterichthyodes.
S. K. HEMMINGS, J. ROSTRON
openaire   +1 more source

Ein mitteldevonischer Antiarche,Gerdalepis jesseni n. sp., aus der Sötenicher Mulde, Nord-Eifel (Rheinisches Schiefergebirge)

Paläontologische Zeitschrift, 1982
Beschrieben wird der exoskelettale Schultergurtel der Antiarchi-FormGerdalepis jesseni n. sp. aus dem mittleren Eifelium (Holotyp). Er ist, obwohl ahnlich triangular, verhaltnismasig niedriger und langer als der vonG. rhenana (Beyrich). Der Anteromediodorsal-Knochen (AMD) der neuen Art besitzt einen erstmalig bei einem Vertreter dieser Gattung ...
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Structure and function of the pectoral joint and operculum in antiarchs, Devonian placoderm fishes

1992
(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
Young, Gavin C., Zhang, Guorui
openaire   +1 more source

Crested antiarch Bothriolepis zadonica H.D. Obrucheva from the Lower Famennian of Central European Russia

2004
Sergeymoloshnikov (2004): Crested antiarch Bothriolepis zadonica H.D. Obrucheva from the Lower Famennian of Central European Russia.
openaire   +1 more source

Vascularization of the osteostracan and antiarch (Placodermi) pectoral fin: similarities, and implications for placoderm relationships

Lethaia, 2002
Phylogenetic analyses frequently resolve the extinct group Placodermi at the base of the clade of jawed fishes (traditionally known as the Gnathostomata), with the jawless fish group Osteostraci as sister taxon to this clade. Both gnathostomes and osteostracans possess pectoral fins supported by a radial(s) articulating on a cartilaginous ...
openaire   +1 more source