Thelodont scales from the Middle-Late Devonian Aztec Siltstone, southern Victoria Land, Antarctica

1992 ◽  
Vol 4 (1) ◽  
pp. 89-105 ◽  
Author(s):  
S. Turner ◽  
G. C. Young
Keyword(s):  
New Species ◽  
Middle Devonian ◽  
Late Devonian ◽  
Close Affinity ◽  
Victoria Land

A new fossil agnathan, Turinia antarctica sp. nov., based on numerous isolated scales, comes from the lower fish-bearing beds of the Aztec Siltstone. Scales from moraine at Mount Suess, originally described as selachian or psammosteid heterostracan, are referred to the new species which shows close affinity with T. gondwana from Bolivia and T. cf. hutkensis from Iran. Reassessment of the biostratigraphy of Middle Devonian turiniid scales suggests that the lower part of the Aztec Siltstone may be of Eifelian age.

New arthrodires (placoderm fishes) from the Aztec Siltstone (late Middle Devonian) of southern Victoria Land, Antarctica

2014 ◽  
Vol 62 (1) ◽  
pp. 44 ◽  
Author(s):  
Gavin C. Young ◽  
John A. Long
Keyword(s):  
South Africa ◽  
New Taxa ◽  
Middle Devonian ◽  
Late Devonian ◽  
Dorsal Plate ◽  
Victoria Land ◽  
Small Collection ◽  
Vertebrate Assemblage ◽  
Devonian Age

A small collection of arthrodire remains is described from the Devonian Aztec Siltstone of southern Victoria Land, Antarctica. Barwickosteus antarcticus, gen. et sp. nov., is a small phlyctaeniid arthrodire probably closely related to Barrydalaspis from the Bokkeveld Group of South Africa. Grifftaylor antarcticus, gen. et sp. nov., is a generalised phlyctaeniid resembling Phlyctaenius and Neophlyctaenius. New specimens of Boomeraspis show that it had a high-spired trunk-armour with a median dorsal plate of similar proportions to Tiaraspis, Mithakaspis, Turrisaspis or Africanaspis. Other fragmentary median dorsal plates are provisionally referred to Turrisaspis and Mulgaspis. With these new taxa the vertebrate assemblage from the Aztec Siltstone comprises at least 37 genera and 50 species, making it one of the most diverse of Middle–Late Devonian age.

Phyllolepid placoderm fish remains from the Devonian Aztec Siltstone, southern Victoria Land, Antarctica

2005 ◽  
Vol 17 (3) ◽  
pp. 387-408 ◽  
Author(s):  
GAVIN C. YOUNG ◽  
JOHN A. LONG
Keyword(s):  
Mass Extinction ◽  
Middle Devonian ◽  
Fish Fauna ◽  
Disjunct Distribution ◽  
Late Devonian ◽  
Antarctic Species ◽  
Victoria Land ◽  
Fish Remains ◽  
Dispersal Events ◽  
The Antarctic

Phyllolepid placoderm remains from the Aztec Siltstone fish fauna are described as Austrophyllolepis quiltyi sp. nov., Austrophyllolepis cf. A. youngi, Placolepis tingeyi sp. nov., and phyllolepid indet. The new Antarctic species of two genera previously only known from Australia reinforce evidence from other fish taxa of close biogeographic affinity, as part of the eastern margin of Palaeozoic Gondwana. At least three genera and four species gives the Aztec Siltstone fish fauna the most diverse phyllolepid assemblage known, and probably the oldest documented so far (?late Middle Devonian). Specimens of Austrophyllolepis from the type locality at Mount Howitt, Victoria, are refigured for comparison with the Antarctic species. The order Phyllolepida is a key group for understanding Devonian vertebrate biogeography and palaeogeography, with a unique disjunct distribution in both time and space between the Southern and Northern hemispheres. Phyllolepids document one of the major dispersal events in early vertebrate history, which approximately coincided with the Frasnian–Famennian boundary mass extinction during the Late Devonian.

scholarly journals Species of the Devonian aulacopleurid trilobite Cyphaspides from southeastern Morocco

2019 ◽  
Vol 94 (1) ◽  
pp. 99-114
Author(s):  
Brian D.E. Chatterton ◽  
Stacey Gibb ◽  
Ryan C. McKellar
Keyword(s):  
New Species ◽  
Middle Devonian ◽  
Present Contribution ◽  
Three New Species ◽  
Emended Diagnosis

AbstractThree new species of Cyphaspides are proposed: C. ammari, C. nicoleae, and C. pankowskiorum. These species are based on specimens obtained from Middle Devonian (Eifelian) strata of the Bou Tchrafine Group, near Erfoud, in the Province of Errachidia, southeastern Morocco. The present contribution enhances our knowledge of Cyphaspides by providing details of three new species that are based on well-preserved, complete, and articulated types. The genus Cyphaspides is discussed, and an emended diagnosis is provided. The paleobiogeography, ontogeny, and relationships of the genus are discussed.UUID: http://zoobank.org/4a7aab8f-8c8e-4498-9cc2-6f8c69b85213

A new species of Hyattechinus (Echinoidea) from the type Devonian of the United Kingdom and implications for the distribution of Devonian proterocidarid echinoids

2018 ◽  
Vol 156 (5) ◽  
pp. 801-810 ◽  
Author(s):  
JEFFREY R. THOMPSON ◽  
TIMOTHY A. M. EWIN
Keyword(s):  
New Species ◽  
Sea Urchins ◽  
Appalachian Basin ◽  
Upper Devonian ◽  
Late Devonian ◽  
New Taxon ◽  
The North ◽  
Late Palaeozoic ◽  
Diversity Dynamics ◽  
A New Species

AbstractMany of the most diverse clades of Late Palaeozoic echinoids (sea urchins) originated in the Devonian period. Our understanding of diversity dynamics of these Late Palaeozoic clades are thus informed by new systematic descriptions of some of their earliest members. The Proterocidaridae are a diverse and morphologically distinct clade of stem group echinoids with flattened tests and enlarged adoral pore pairs, which are first known from the Upper Devonian. We herein report on a new species of Hyattechinus, Hyattechinus anglicus n. sp., from the Upper Devonian of the North Devon Basin, Devon, UK. This is the first Devonian Hyattechinus known from outside of the Appalachian Basin, USA, and provides novel information regarding the palaeogeographic and stratigraphic distribution of proterocidarids in Late Devonian times. We additionally update the stratigraphic distribution of Devonian Hyattechinus from the Appalachian Basin, following recent biostratigraphic resolution of their occurrences. Hyattechinus appears to have been present in the Rheic echinoderm fauna during Late Devonian times, and comparison of the palaeoenvironmental setting of Hyattechinus anglicus with that of other Hyattechinus from the Famennian of the Appalachian Basin suggests that the genus may have preferred siliciclastic settings. Furthermore, this new taxon increases the diversity of echinoids from the Upper Devonian of Devon to three species.

Three new species of Ranunculus (Ranunculaceae) form Tasmania.

Brunonia ◽  
1985 ◽  
Vol 8 (2) ◽  
pp. 373 ◽  
Author(s):  
Y Menadue ◽  
RK Crowden
Keyword(s):  
New Species ◽  
The Third ◽  
Close Affinity ◽  
Three New Species

Three newspecies of the genus Ranunculus L. are reported from Tasmania. Two of the new species, R. collicolus and R. prasinus, are stoloniferous and show affinities with R. acaulis Banks & Sol. ex DC., R. collinus R. Br. ex DC. and R. glabrifolius Hook. The third, R. jugosus, has close affinity with the endemic R. triplodontus Melville.

Gigantocharinus szatmaryi, a new trigonotarbid arachnid from the Late Devonian of North America (Chelicerata, Arachnida, Trigonotarbida)

2000 ◽  
Vol 74 (1) ◽  
pp. 25-31 ◽  
Author(s):  
William A. Shear
Keyword(s):  
North America ◽  
Middle Devonian ◽  
New Genus ◽  
Upper Devonian ◽  
Late Carboniferous ◽  
Late Devonian ◽  
New Genus And Species ◽  
Significant Time ◽  
The Family ◽  
Time Gap

A new trigonotarbid arachnid, Gigantocharinus szatmaryi new genus and species, is described from Upper Devonian (Late Famennian) sediments in Pennsylvania. Devonian trigonotarbids were known before from only a single North American locality and several European ones. The new trigonotarbid occurs in what had previously been a significant time gap between the faunas of the Middle Devonian and the late Carboniferous. Gigantocharinus szatmaryi is assigned with some hesitation to the family Palaeocharinidae.

Polyxylon australe ̵1 a New Cladoxylalean Axis From the Devonian of Australia

1986 ◽  
Vol 34 (6) ◽  
pp. 675 ◽  
Author(s):  
TC Chambers ◽  
MA Regan
Keyword(s):  
New Species ◽  
New South ◽  
Great Distance ◽  
Late Devonian ◽  
Anatomical Structures ◽  
South Wales ◽  
Vascular Segment ◽  
New Albany Shale ◽  
The One ◽  
A New Species

Two well preserved axes discovered in the Late Devonian Mudstones at Barraba, New South Wales, Australia, have an anatomy resembling that of Polyxylon elegans described in 1939 by Read and Campbell from the Late Devonian New Albany Shale of Indiana, U.S.A. in the northern hemisphere. We have erected a new species, Polyxylon australe, for these larger axes from the southern hemisphere. From our study of the anatomy of both the Australian and American axes we agree with Leclercq, who in 1970 grouped Polyxylon with the Cladoxylopsida. However, in Polyxylon australe the protoxylem appears to be exarch at the tips of the xylem arms while in most other members of the Cladoxylopsida the protoxylem seems to be confined to a peripheral loop in each radially aligned vascular segment. The occurrence of two species of the one genus with similar anatomical structures, geographically at great distance from one another, raises some interesting questions of Late Devonian phytogeography.

The otarionine trilobites Harpidella and Maurotarion, with species from northwestern Canada, the United States, and Australia

1995 ◽  
Vol 69 (2) ◽  
pp. 307-326 ◽  
Author(s):  
Jonathan M. Adrain ◽  
Brian D. E. Chatterton
Keyword(s):  
United States ◽  
New Species ◽  
Northwest Territories ◽  
Middle Devonian ◽  
The United States ◽  
Upper Ordovician ◽  
Mackenzie Mountains ◽  
New Diagnosis

Maurotarion Alberti, 1969, is a diverse otarionine clade that can be readily distinguished from Harpidella M'Coy, 1849. Both genera appear in the Upper Ordovician and range until the Middle Devonian. A new diagnosis for each taxon is given. New species of the genera from the Ordovician and Silurian of the central Mackenzie Mountains, Northwest Territories, Canada, include Harpidella kurrii (Ashgill), H. tikkaneni (Llandovery), H. greggi (Wenlock), and Maurotarion messieri (Llandovery). Harpidella megalops (M'Coy, 1846), H. triloba (Hu, 1975), H. spinafrons (Williams in Cooper and Williams, 1935), Maurotarion struszi (Chatterton, 1971), and M. instita (Whittington and Campbell, 1967) are revised.

scholarly journals Gastrodia kuroshimensis (Orchidaceae), a new mycoheterotrophic and complete cleistogamous plant from Japan

Phytotaxa ◽  
2016 ◽  
Vol 278 (3) ◽  
pp. 265 ◽  
Author(s):  
KENJI SUETSUGU
Keyword(s):  
New Species ◽  
Floral Morphology ◽  
Tube Size ◽  
Close Affinity ◽  
Perianth Tube ◽  
Kagoshima Prefecture ◽  
A New Species

A new species, Gastrodia kuroshimensis (Orchidaceae: Epidendroideae: Gastrodieae), from Kuroshima Island, Kagoshima Prefecture, Japan, is described and illustrated. The outlined floral morphology indicates a close affinity to G. fontinalis, but it is easily distinguished by several characteristics, such as the cleistogamous floral condition, smaller perianth tube size and the anther cap joined with the column.

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