Catenalis digitata, gen. et sp.nov., a plant from the Lower Devonian (Siegenian) of Yunnan, China

1991 ◽  
Vol 69 (4) ◽  
pp. 873-882 ◽  
Author(s):  
Hao Shougang ◽  
Charles B. Beck
Keyword(s):  
Key Words ◽  
Vascular Plants ◽  
Major Part ◽  
Lower Devonian ◽  
New Genus ◽  
Vascular Plant ◽  
Morphological Differentiation ◽  
Distal Margin ◽  
New Genus And Species

A new genus and species, Catenalis digitata, is described from two localities of the Posonchong Formation of Siegenian age in the Wenshan district of Yunnan. This small, dichotomously branched plant exhibits morphological differentiation into a vegetative region that comprises the major part of the plant and terminal fertile regions. The fertile regions consist of fan-shaped clusters of terminal branchlets that bear uniseriate sporangia on only one side. Many sporangia have a crescent-shaped dehiscence slit near the distal margin. Some terminal branchlets in fertile regions lack sporangia, but the positions from which they have apparently been lost are conspicuous as elliptical regions. In these segments a dark, carbonaceous strand is apparent in a groove along the midplane. A few tracheid-like fragments have been macerated from a segment of carbonized axis suggesting that Catenalis might have been a vascular plant, but because of a lack of detailed information on the components of these strands we cannot conclude with certainty that they were typical vascular plant tracheids. Because of a morphology intermediate between that of certain fucalean algae and typical land vascular plants, we suggest that Catenalis might represent a group ancestral to vascular plants or a new group of primitive vascular plants of algal derivation. Key words: Catenalis digitata, alga-like, dichotomous, uniseriate sporangia, Siegenian, Yunnan.

A new vascular plant from the Lower Devonian Windyfield chert, Rhynie, NE Scotland

1999 ◽  
Vol 90 (4) ◽  
pp. 331-349 ◽  
Author(s):  
Clare L. Powell ◽  
Dianne Edwards ◽  
Nigel H. Trewin
Keyword(s):  
Lower Devonian ◽  
New Genus ◽  
Vascular Plant ◽  
New Taxon ◽  
New Genus And Species ◽  
Rhynie Chert ◽  
Microbial Film

AbstractTwo plants are described from fragmentary remains preserved in the Windyfield chert, situated c. 600 m from the classic Rhynie chert locality. Both are sometimes coated by a microbial film. The larger, fertile axes are placed in the new genus and species Ventarura lyonii. They possess a distinctive, sclerenchymatous middle cortex and terete xylem, and marginally dehiscent, lateral sporangia. The new taxon is similar to the Rhynie zosterophyll Trichopherophyton teuchansii, but is placed in a new genus on sporangial differences. Associated smaller axes with unicellular epidermal outgrowths lack the middle cortex of the larger axes and often have medullated protosteles. They are interpreted as subterranean rhizomes and probably belong to the new fertile taxon, but organic continuity between the two has not been demonstrated.

scholarly journals Chlorophytum nepalense (Lindley) Baker (Liliaceae) - A new angiospermic record for Bangladesh

1970 ◽  
Vol 37 (2) ◽  
pp. 193-194 ◽  
Author(s):  
Sumona Afroz ◽  
Ershad Tutul ◽  
Mohammad Zashim Uddin ◽  
Md Abul Hassan
Keyword(s):  
Key Words ◽  
New Record ◽  
New Genus ◽  
Perennial Herb ◽  
New Genus And Species ◽  
The Family

Chlorophytum nepalense (Lindley) Baker, a perennial herb, belonging to the family Liliaceae has been described and illustrated as a new genus and species record for Bangladesh. Key words: Chlorophytum nepalense, New record, Bangladesh doi:10.3329/bjb.v37i2.1730 Bangladesh J. Bot. 37(2): 193-194, 2008 (December)

The first zosterophyll from the Lower Devonian Rhynie Chert, Aberdeenshire

1991 ◽  
Vol 82 (4) ◽  
pp. 324-332 ◽  
Author(s):  
A. G. Lyon ◽  
Dianne Edwards
Keyword(s):  
Lower Devonian ◽  
New Genus ◽  
New Genus And Species ◽  
Early Devonian ◽  
Precise Positioning ◽  
Cortical Zone ◽  
Lack Of Information ◽  
Rhynie Chert

ABSTRACTFragmentary remains of a vascular sporophyte from the Rhynie Chert are described as a new genus and species, Trichopherophyton teuchansii. The plant, which is characterised by the possession of unicellular spinous hairs, exarch xylem and laterally attached, marginally dehiscent sporangia, is assigned to the Zosterophyllophytina, but lack of information on the arrangement of sporangia prevents its more precise positioning within the subdivision. Unusual features include the combination of circinate tips to axes with almost terete xylem strands, and the lack of a thick-walled outer cortical zone. Associated axes, lacking spinous hairs, but having papillate or rhizoid-like epidermal emergences, are interpreted as likely rhizomes of Trichopherophyton. Features, such as unicellular spinous hairs, rhizoid-like emergences, circinate tipsand parenchymatous cortex are considered in relation to the functioning and growth of aplant inhabiting an early Devonian wetland.

scholarly journals A fossil loricariid catfish (Siluriformes: Loricarioidea) from the Taubaté Basin, eastern Brazil

2007 ◽  
Vol 5 (3) ◽  
pp. 263-270 ◽  
Author(s):  
Maria Claudia Malabarba ◽  
John G. Lundberg
Keyword(s):  
New Genus ◽  
Transverse Process ◽  
Ventral Side ◽  
Dorsal Margin ◽  
Distal Margin ◽  
Transverse Wall ◽  
New Genus And Species ◽  
Eastern Brazil ◽  
Lateral Ethmoid ◽  
Different Levels

A new loricariid catfish is described from the Tremembé Formation (Late Oligocene to Early Miocene) sediments of the Taubaté Basin in eastern São Paulo State, Brazil. Taubateia paraiba, new genus and species, is based on a single specimen preserved as a ventral-side impression of an articulated partial neurocranium, dorsal elements of the pectoral girdle and anterior vertebrae. The fossil is identified as belonging to family Loricariidae based on obvious overall similarity and the presence of diagnostic derived characters such as: odontodes, dorsal margin of metapterygoid contacting lateral ethmoid, presence of mesethmoid disk (condyle), and compound pterotic-supracleithrum bone. Also, as in most loricariids, the ossified transcapular (Baudelot's) ligament plus basiocciptal lateral process form a prominent transverse wall at the occiput. Other derived characters preserved in Taubateia are synapomorphies at different levels within Loricariidae, including a wide and low parasphenoid, form of pterotic-supracleithrum, shape and position of the mesethmoid disk, a triangular lateral ethmoid with expanded posterolateral corner and a rounded and low ridge articulating with the metapterygoid, and a pointed distal margin of transverse process of the Weberian compound centrum. The derived characters recognized in this fossil are a distinctive combination for diagnosing a new genus and species but not for its unambiguous placements in any of the currently recognized loricariid subfamilies.

Two new cirroidean genera (Vetigastropoda, Archaeogastropoda) from the Emsian (Late Early Devonian) of Alaska with notes on the early phylogeny of Cirroidea

1998 ◽  
Vol 72 (2) ◽  
pp. 265-273 ◽  
Author(s):  
Jiří Frýda ◽  
Robert B. Blodgett
Keyword(s):  
New Species ◽  
Lower Devonian ◽  
New Genus ◽  
New Genus And Species ◽  
Early Devonian ◽  
West Central ◽  
The Family ◽  
First Time ◽  
Stratigraphic Range

Two new cirroidean gastropod genera, Alaskiella (family Porcelliidae) and Alaskacirrus (family Cirridae), from the Emsian (late Early Devonian) of west-central Alaska (Medfra B-4 quadrangle) are described. The shell of Alaskiella medfraensis new genus and species exhibits inclined heterostrophic coiling. This shell character is known among other members of the subclass Archaeogastropoda, but is recorded for the first time within members of the superfamily Cirroidea. Inclined heterostrophic coiling of the shell was probably developed independently in several different groups of the subclass Archaeogastropoda. The new genus Alaskacirrus, represented by Alaskacirrus bandeli new species, is the oldest and only known Paleozoic member of the family Cirridae. This suggests that the family Cirridae was separated from the family Porcelliidae since at least Early Devonian time and that it most probably developed from the subfamily Agnesiinae of the family Porcelliidae. Thus, the stratigraphic range of the family Cirridae is at least from Lower Devonian to Cretaceous, an interval of about 350 million years.

Isolation and characterization of cellulolytic anaerobic fungi and associated mycoplasmas from the rumen of a steer fed a roughage diet

1990 ◽  
Vol 36 (7) ◽  
pp. 513-517 ◽  
Author(s):  
H. Kudo ◽  
K. D. Jakober ◽  
R. C. Phillippe ◽  
K.-J. Cheng ◽  
D. J. S. Barr ◽  
...  
Keyword(s):  
Key Words ◽  
New Genus ◽  
Anaerobic Fungi ◽  
Ecological Role ◽  
New Genus And Species ◽  
Fermentation Products ◽  
Isolation And Characterization ◽  
Neocallimastix Patriciarum

The isolation of 12 strains of cellulolytic fungi from the rumen of a roughage-fed steer is described. These represented three different genera, including one new genus and species (Orpinomyces bovis). The organisms were indistinguishable on the basis of fermentation products from cellulose, and their fermentation patterns were very similar to those of rumen fungi isolated in other countries. Mycoplasmas were found to be associated with 7 of the 12 isolates. The ecological role of the association of the mycoplasmas with rumen fungi is still unknown. Key words: Orpinomyces bovis, Piromyces communis, Neocallimastix patriciarum.

scholarly journals New dalmanitid trilobite taxa from the Lower Devonian of Argentina: comments on spinosity in endemic taxa from southern high paleolatitudes

2022 ◽  
Author(s):  
Enrique A. RANDOLFE ◽  
Juan José RUSTÁN ◽  
Arnaud BIGNON
Keyword(s):  
Lower Devonian ◽  
New Genus ◽  
Marine Ecosystems ◽  
Predation Pressure ◽  
New Genus And Species

Three new Lower Devonian dalmanitid trilobite taxa are recognized from the Talacasto Formation in the Precordillera Basin, Argentina, which includes two monospecific genera (Ivanites leonorae n. gen., n. sp. and Aguaditaspis mediaspina n. gen., n. sp.), and one additional new genus and species left in open nomenclature. These taxa combine characters of the subfamilies Dalmanitinae Vogdes, 1890 and Synphoriinae Delo, 1935, challenging their taxonomic distinction. Forty percent of the dalmanitids from high paleolatitudinal basins from southwestern Gondwana (Malvinokaffric) exhibit non-homologous dorsal spinosity. Aguaditaspis mediaspina n. gen., n. sp. shares similar spines with Trypaulites calypso (Hall, 1861). The unnamed new genus resembles the spinosity of endemic Malvinokaffric dalmanitids, like Dalmanitoides Delo, 1935 and Fenestraspis Braniša & Vaněk, 1973. Considered defensive, the recorded spinosity along with putative sublethal-attack marks, suggest higher predation pressure than previously thought at high paleolatitudes. This evidence is in accordance with some hypothesis on rising predation pressure in the mid-Paleozoic marine ecosystems.

Cophecheilus bamen, a new genus and species of labeonine fishes (Teleostei: Cyprinidae) from South China

Zootaxa ◽  
2011 ◽  
Vol 2881 (1) ◽  
pp. 39 ◽  
Author(s):  
YU ZHU ◽  
E ZHANG ◽  
MING ZHANG ◽  
YAO-QUAN HAN
Keyword(s):  
South China ◽  
New Genus ◽  
The Body ◽  
Distal Margin ◽  
Guangxi Province ◽  
New Genus And Species ◽  
Black Stripe ◽  
Lower Lip ◽  
Upper Jaw ◽  
The Pearl River

A new garrain genus and species are described from a tributary of the Zuo-River of the Pearl River drainage in Guangxi Province, South China. Cophecheilus, new genus, is separated from all other Asian garrains by its uniquely modified oromandibular morphology; i.e., rostral cap with a shallow, arched, subdistal depression extending almost the full length of its ventral margin; upper lip greatly reduced to a thin membranous fold medially adnate to the upper jaw, but reflected slightly from its distal margin, and laterally produced into a frenum connecting the upper jaw with the lower lip. The new species, Cophecheilus bamen, has an inconspicuous longitudinal black stripe extending along each side of the body.

New and revised Lower Devonian Rugosa from Western North America and Tasmania

1998 ◽  
Vol 72 (2) ◽  
pp. 224-245 ◽  
Author(s):  
A.E.H. Pedder
Keyword(s):  
North America ◽  
Type Species ◽  
Lower Devonian ◽  
New Genus ◽  
Yukon Territory ◽  
Western North America ◽  
Family Status ◽  
New Genus And Species ◽  
New Material

Anactolasma yukonanum new genus and species is described from the Pragian of Yukon Territory and is assigned to the Anactolasmatinae, a new subfamily of the Mucophyllidae Hill. Adult stages of Anactolasma resemble gerontic stages of Kobeha Merriam, although the genera have distinct ontogenies. Kobeha is revised on the basis of new material of its type species K. walcotti Merriam. The Papiliophyllinae Stumm are promoted to family status. Kobeha ketophylloides Merriam, from the Pragian of Nevada, and Endophyllum banksi Jell and Hill, from the Pragian of Tasmania, are restudied using new topotypic and other material. A new endophyllid genus named Murphyphyllum is erected for them, with E. banksi as type species. Asarcophyllum ramosum new genus and species, from the Emsian of Nevada, is made type species of a new cyathophyllid genus. Spongophyllum nevadense Stumm and S. expansum Stumm, both also from the Emsian of Nevada, are placed in the new genus, as is Asarcophyllum corona new genus and species, from the Emsian of Yukon Territory. Biostratigraphic settings, with emphasis on associated corals, brachiopods and conodonts, are given for the new and revised genera and species.

scholarly journals Incasarus garciai, a new genus and species of panurgine bees from the Peruvian Andes (Hymenoptera: Andrenidae)

2013 ◽  
pp. 1 ◽  
Author(s):  
Victor H. Gonzalez ◽  
Claus Rasmussen ◽  
Michael S. Engel
Keyword(s):  
New Genus ◽  
Distal Margin ◽  
New Genus And Species ◽  
Peruvian Andes ◽  
Large Disc

Incasarus garciai Gonzalez, Rasmussen, & Engel, a new genus and species of protandrenine bees (Andrenidae: Panurginae), is described and figured from a male collected in Ayacucho, Peru. Incasarus superficially resembles Liphanthus Reed in the narrow pterostigma and gonostylus articulated to the gonocoxite but it can be distinguished easily by the combination of two submarginal cells, the seventh sternum with apodemes and apical lobes broad, short, attached to a large disc, and the gonostylus long, about as long as the gonocoxite. Incasarus also resembles Rhophitulus Ducke and Heterosarus Robertson in the male seventh tergum with the distal margin medially projected, but it differs from both genera in the shape of the hidden sterna and genitalia, among other features.

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