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.

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.

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.

scholarly journals <i>Navilithus altivelum</i>: a remarkable new genus and species of deep photic coccolithophores

2006 ◽  
Vol 25 (2) ◽  
pp. 141-151 ◽  
Author(s):  
Jeremy R. Young ◽  
Harald Andruleit
Keyword(s):  
New Species ◽  
Indian Ocean ◽  
New Genus ◽  
Molecular Genetic ◽  
New Taxon ◽  
New Genus And Species ◽  
Significant Addition ◽  
A New Species ◽  
Genetic Results ◽  
Basal Structure

Abstract. A very distinctive new deep-photic coccolithophore is described from the NE Indian Ocean. The new species is trimorphic with: 200–300 body coccoliths bearing low spines attached by narrow stems to a basal narrow-rimmed placolith structure; up to 18 circum-flagellar coccoliths with tall sail-like spines; and up to 22 coccoliths with moderately elevated spines occurring both around the circum-flagellar coccoliths and antapically. These features make the coccolithophore unique and require placement in a new species and genus. The basal structure, however, shows similarities to a recently recognized group of narrow-rimmed placoliths. Hence, the new coccolithophore provides some support for this grouping as a significant addition to our understanding of coccolithophore biodiversity, and potentially an explanation for a set of anomalous molecular genetic results. In addition the new taxon provides further evidence that the deep-photic coccolithophore community is more diverse than has been assumed.

A new cockroach (Blattaria: Caloblattinidae) from the Upper Triassic Xujiahe Formation of Sichuan Province, southwestern China

2013 ◽  
Vol 44 (2) ◽  
pp. 167-174
Author(s):  
Yan Fang ◽  
Haichun Zhang ◽  
Bo Wang ◽  
Daran Zheng
Keyword(s):  
Elemental Analysis ◽  
Anterior Margin ◽  
New Genus ◽  
Sichuan Province ◽  
Upper Triassic ◽  
Southwestern China ◽  
New Taxon ◽  
New Genus And Species ◽  
X Ray ◽  
Xujiahe Formation

A new genus and species of the cockroach family Caloblattinidae, Dazhublattella lini gen. et sp.n., is described from the Upper Triassic Xujiahe Formation of Sichuan Province, in southwestern China. The new taxon is similar to the Triassic Caloblattina mathildae (Geinitz, 1883) (Vršanský & Ansorge 2007) in the venation and pattern, but differs in the less elongated forewing with arched anterior margin. An elemental analysis of the wing is undertaken using Energy Dispersive X-ray analysis.

A new genus and species of groundwater isopod of the family Protojaniridae (Isopoda: Asellota: Gnathostenetroidoidea) from southern Chile

Zootaxa ◽  
2021 ◽  
Vol 4966 (5) ◽  
pp. 550-562
Author(s):  
JORGE PÉREZ-SCHULTHEISS ◽  
GEORGE D. F. WILSON
Keyword(s):  
New Genus ◽  
South American ◽  
New Taxon ◽  
Southern Chile ◽  
New Genus And Species ◽  
The Third ◽  
The Family ◽  
Apical Lobe ◽  
Antennal Scale ◽  
Freshwater Springs

A new asellotan isopod of the family Protojaniridae Fresi, Idato & Scipione, 1980 is described from freshwater springs in the Osorno province, Los Lagos region, southern Chile. Wiyufiloides osornoensis gen. & sp. n. is the third South American protojanirid species and the first known groundwater isopod in Chile. The new genus and species is principally characterized by the presence of a vestigial antennal scale, a strongly subchelate pereiopod I and the absence of an apical lobe on the protopod of pleopod II. The new taxon is described in detail and figures are given. 

scholarly journals Ostracoda (Crustacea) from the Archipelago of São Pedro and São Paulo, Equatorial Atlantic, with emphasis on a new Hemicytheridae genus

2013 ◽  
Vol 103 (3) ◽  
pp. 289-301 ◽  
Author(s):  
João C. Coimbra ◽  
Silvia R. Bottezini ◽  
Cláudia P. Machado
Keyword(s):  
New Species ◽  
New Genus ◽  
Abundant Species ◽  
Oceanic Islands ◽  
New Taxon ◽  
Equatorial Atlantic ◽  
New Genus And Species ◽  
Specific Level ◽  
Recent Sediments ◽  
Systematic Knowledge

The present study is a further contribution to the systematic knowledge of the shallow water marine ostracodes from the Brazilian oceanic islands. A total of 14 species belonging to 10 genera and eight families is herein identified. One new genus and species are described and illustrated: Berguecythere insularis gen. nov., sp. nov. In addition to this new taxon, the abundant species Loxocorniculum tricornatum Krutak, 1971, widely distributed in recent sediments in the Gulf of Mexico, Caribbean, north and northeast of Brazil and the Rocas Atoll, along with the cosmopolitan tropical ostracode Triebelina sertata Triebel, 1948, were also identified at specific level. The remaining 11 species were left at the genus level, and should provide new species. Ecological, zoo- and paleozoogeographical aspects were also briefly discussed.

scholarly journals The Unicorn exists! A remarkable new genus and species of Perilissini (Hymenoptera: Ichneumonidae) from South East Asia

2018 ◽  
Vol 58 (2) ◽  
pp. 523-529
Author(s):  
Alexey Reshchikov ◽  
Cornelis Van achterberg
Keyword(s):  
East Asia ◽  
Type Species ◽  
New Genus ◽  
South East Asia ◽  
New Taxon ◽  
New Genus And Species ◽  
Northern Thailand ◽  
Facial Projection

Abstract Gilen gen. nov. (type species G. orientalis sp. nov.) from South East Asia is described and illustrated. The new taxon has a produced mid-longitudinal facial projection, which differentiates it from all other known genera of Ichneumonidae. It belongs to the tribe Perilissini in the subfamily Ctenopelmatinae (Hymenoptera, Ichneumonidae) and is recorded from Laos, Northern Thailand and Vietnam.

Sphaeraphodius gaohani, a new genus and species of Aphodiini (Coleoptera: Scarabaeidae: Aphodiinae) from Guangxi, China

Zootaxa ◽  
2021 ◽  
Vol 4949 (2) ◽  
pp. 333-340
Author(s):  
SHOWTARO KAKIZOE ◽  
RI-XIN JIANG ◽  
HAO-HONG CAI ◽  
SHUO WANG
Keyword(s):  
New Species ◽  
New Genus ◽  
New Taxon ◽  
New Genus And Species ◽  
Insufficient Information

Sphaeraphodius gaohani Kakizoe, Jiang & Wang, a new genus and new species of the tribe Aphodiini, is described based on two female specimens from Guangxi, China. This new genus differs considerably from any previously known genera of Aphodiini by dorsally swollen body covered by considerably long setae, and lack of transverse setiferous carinae on outer surfaces of meso- and metatibiae. This new taxon is found sympatrically with the termite Macrotermes sp. in the field. Therefore, this species is perhaps termitophilous, but we cannot conclude it at this time due to the insufficient information available in the field. 

A New Genus and Species of Delphacidae (Hemiptera: Fulgoroidea: Delphacidae) from Costa Rica

Zootaxa ◽  
2019 ◽  
Vol 4657 (2) ◽  
pp. 361-368
Author(s):  
CHARLES R. BARTLETT
Keyword(s):  
Costa Rica ◽  
New Genus ◽  
The Body ◽  
New Taxon ◽  
Ventral Margin ◽  
New Genus And Species ◽  
Distinctive Features ◽  
Caudal Margin ◽  
General Appearance

Melaniphax suffusculus gen. et sp. nov. is described from Costa Rica, representing the 57th delphacid species recorded from the country to date. The new genus is superficially similar to Caenodelphax Fennah in general appearance in that the body is uniformly colored with the wings infuscated. Distinctive features of the new taxon include simple, forceps-like gonostyli, a broadly compressed aedeagus with large serrate lateral flanges, and the anal tube bearing a pair of short, stout, truncate, caudally-directed processes on the ventro-caudal margin and slender, elongate processes from the antero-ventral margin. 

scholarly journals Burmese amber reveals a new stem lineage of whirligig beetle (Coleoptera: Gyrinidae) based on the larval stage

2020 ◽  
Vol 189 (4) ◽  
pp. 1232-1248
Author(s):  
Grey T Gustafson ◽  
Mariano C Michat ◽  
Michael Balke
Keyword(s):  
Larval Stage ◽  
New Genus ◽  
Morphological Characters ◽  
New Taxon ◽  
New Genus And Species ◽  
Burmese Amber ◽  
Extinction Event ◽  
Stem Lineage ◽  
Key Features ◽  
Mass Extinction Event

Abstract Burmese amber is well known for preserving unique extinct lineages of insects. Here, we describe a new fossil beetle in its larval stage from Burmese amber. Bayesian and parsimony phylogenetic analysis of 50 morphological characters support this fossil as being sister to both the tribes Dineutini and Orectochilini, representing an extinct stem lineage in Gyrininae. It is described here as a new genus and species of whirligig beetle, Chimerogyrus gigagalea gen. & sp. nov., a taxon that preserves remarkable intermediate features between the whirligig beetle tribe Gyrinini and the crown Orectochilini and Dineutini. This new taxon preserves key features for studying the evolution of characters within the larval stage of the Gyrinidae and highlights the importance of Burmese amber for preserving both stem and crown lineages present during the mid-Cretaceous, before the end-Cretaceous mass extinction event.

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