scholarly journals Phegopteris excelsior (Thelypteridaceae): A New Species of North American Tetraploid Beech Fern

2019 ◽  
Vol 27 (4) ◽  
pp. 211-218 ◽  
Author(s):  
Nikisha R. Patel ◽  
Susan Fawcett ◽  
Arthur V. Gilman
Keyword(s):  
New Species ◽  
North America ◽  
Principal Components Analysis ◽  
Principal Components ◽  
North American ◽  
Northeastern North America ◽  
Specific Rank ◽  
Components Analysis ◽  
Morphological Differences ◽  
A New Species

Since the 1970s, an apomictic tetraploid beech fern (genus Phegopteris (C. Presl) Fée) has been known in northeastern North America. Previously published isozyme data suggest that this lineage is of allopolyploid origin involving long beech fern (P. connectilis (Michx.) Watt.) but not broad beech fern (P. hexagonoptera (Michx.) Fée), as originally hypothesized. Its second progenitor remains unknown. We performed a principal components analysis of the apomict and its North American congeners to elucidate morphological differences between them. We recognize the apomictic tetraploid at specific rank as P. excelsior N. R. Patel & A. V. Gilman and provide an illustration, a range map, a list of exsiccatae, and a key to Phegopteris species of North America.

A new species of Diplotaxodon (Cichliformes: Cichlidae) from Lake Malaŵi

Zootaxa ◽  
2021 ◽  
Vol 4903 (2) ◽  
pp. 275-284
Author(s):  
JAY R JR. STAUFFER ◽  
ADRIANUS F. KONINGS
Keyword(s):  
New Species ◽  
Principal Components Analysis ◽  
Principal Components ◽  
Cichlid Fish ◽  
Lake Malawi ◽  
Type Specimens ◽  
Snout Length ◽  
Haplochromine Cichlid ◽  
Components Analysis ◽  
A New Species

A species of haplochromine cichlid fish of the genus Diplotaxodon Trewavas, endemic to Lake Malaŵi is described: Diplotaxodon dentatus, new species. All eight type specimens were trawled together off Thumbi East Island in the Southeastern arm of the lake at 73 meters in 1985. They were initially identified as D. argenteus because the teeth on the oral jaws were fully exposed with a closed mouth. The shorter snout length of D. dentatus (26.6–29.2 % HL) clearly separates it from D. argenteus (31.7–34.2 % HL). A plot of a principal components analysis further supports the separation of D. dentatus from D. argenteus. 

Carex xueyingiana (Cyperaceae), a new species from Hainan Island, China

Phytotaxa ◽  
2017 ◽  
Vol 308 (2) ◽  
pp. 239
Author(s):  
HAIJUN YANG ◽  
HAN XU ◽  
YUNFEI DENG ◽  
YIDE LI
Keyword(s):  
Cluster Analysis ◽  
New Species ◽  
Principal Components Analysis ◽  
Principal Components ◽  
Hainan Island ◽  
Morphological Characters ◽  
Components Analysis ◽  
A New Species

A new species of Carex (Cyperaceae), Carex xueyingiana, from section Radicales, is described and illustrated from Hainan Island, China. We analyzed 35 morphological characters using Cluster Analysis and Principal Components Analysis to evaluate the relationships between the new species and the 15 species from the same section occurring in China. The new species is similar to C. chlorocephalula, displaying pubescent rhizomes, leaves densely hispidulous on both surfaces, and slender tufted culms. Carex xueyingiana differs from C. chlorocephalula by the leaves distinctly longer than culms (not equaling these), stems 4–6 mm wide (instead 1–3 mm), bracts sheath-like, 5–6 mm long (instead leaf-like and 2–3.5 cm long), spikes 7–10 mm long (instead 10–15 mm), and perigynium beakless (instead beaked). The new species is only known from Hainan Island and is assessed as Vulnerable (VU DD).

scholarly journals Resolving the anomaly of Lomatium anomalum: discovery of a new species in southwestern Idaho (U.S.A.) Lomatium andrusianum (Apiaceae)

2018 ◽  
Vol 12 (1) ◽  
pp. 1-15
Author(s):  
Mckayla Stevens ◽  
Donald H. Mansfield ◽  
James F. Smith ◽  
Mary Ann E. Feist
Keyword(s):  
New Species ◽  
Principal Components Analysis ◽  
Principal Components ◽  
Species Boundaries ◽  
Monophyletic Clade ◽  
Ecological Data ◽  
Components Analysis ◽  
Multiple Species ◽  
Vegetative Characters ◽  
A New Species

Apparent polyphyly within the unresolved clade of Lomatium (Apiaceae) containing L. triternatum, L. anomalum, L. thompsonii, and L. packardiae suggests conflict among current taxonomic classification schemes. To recover this clade and more clearly define species boundaries, we examined populations of L. anomalum from three geographic regions in Idaho and adjacent Oregon. Using phylogenetic, morphological, and ecological data, we conclude that the L. anomalum complex currently circumscribes multiple species. Phylogenetic analysis of the nuclear ribosomal ITS and ETS, and cpDNA rpl32-trnLUAG, rps-16 intron, trnD-trnT, ndhA intron, and psbA-trnH recovered populations from the Boise foothills as a distinct, monophyletic clade. Principal Components Analysis of 30 reproductive and vegetative characters show two distinct groups: one of Boise foothills and one of the combined Mann Creek and Camas Prairie vicinities. Principal Components Analysis of 16 soil characteristics show that soils occupied by Boise foothills populations are distinct from those occupied by Mann Creek and Camas Prairie populations. Based on phylogenetic, morphometric, and ecologic criteria, populations of what had been considered L. anomalum from the Boise foothills and vicinity are here described as a new species—Lomatium andrusianum. 

Flavonoids and affinities of some North American lupines

1983 ◽  
Vol 61 (3) ◽  
pp. 708-730 ◽  
Author(s):  
K. W. Nicholls ◽  
B. A. Bohm
Keyword(s):  
United States ◽  
North America ◽  
Principal Components Analysis ◽  
Principal Components ◽  
North American ◽  
Southeastern United States ◽  
Flavonoid Glycosides ◽  
Structural Modifications ◽  
Components Analysis

Seventy-three taxa of the genus Lupinus in North America have been studied for their flavonoid constituents. In all, 56 compounds were isolated and either partially or totally characterized. Flavonoid types encountered were flavones, C-glycoflavones, isoflavones, flavonols, and, tentatively, flavanones. Further structural modifications seen were O-methylation, O-glycosylation at a variety of positions and acylation of several of the flavonoid glycosides. Principal-components analysis was performed on (i) presence–absence data of individual compounds with consideration given to relative concentrations and (ii) presence–absence of the types of flavonoid structures. Several groupings of taxa emerged from these analyses based upon the presence of unique compounds or combinations of compounds. In a number of these groups the chemical affinities paralleled morphological affinities closely. In all, 10 groupings were seen. Lupinus diffusus, a simple-leaved taxon from southeastern United States, stood apart from all groups.

A New Gunnel, Pholis clemensi, from the Coast of Western North America

1964 ◽  
Vol 21 (5) ◽  
pp. 933-939 ◽  
Author(s):  
Richard H. Rosenblatt
Keyword(s):  
British Columbia ◽  
New Species ◽  
North America ◽  
North American ◽  
North American Species ◽  
Western North America ◽  
The North ◽  
The Family ◽  
Juan De Fuca ◽  
A New Species

A new species, Pholis clemensi, referred to the family Pholidae, is named and described from 12 specimens taken in southern British Columbia waters and the Strait of Juan de Fuca. Pholis clemensi is compared with other members of the genus, and a key is given to the North American species.

An ammonite zonation for the Toarcian (Lower Jurassic) of the North American Cordillera

1994 ◽  
Vol 31 (6) ◽  
pp. 919-942 ◽  
Author(s):  
Giselle K. Jakobs ◽  
Paul L. Smith ◽  
Howard W. Tipper
Keyword(s):  
New Species ◽  
North America ◽  
North American ◽  
Lower Boundary ◽  
Lower Jurassic ◽  
North American Cordillera ◽  
Queen Charlotte Islands ◽  
The North ◽  
Reference Sections ◽  
A New Species

This is the second in a series of papers intended to establish a Lower Jurassic ammonite zonation that takes into account the biostratigraphic and biogeographic peculiarities of the North American succession. In North America the lower boundary of the Toarcian is drawn at the first appearance of Dactylioceras above the last occurrence of Amaltheus and Fanninoceras. The lower Toarcian is represented by the Kanense Zone; the middle Toarcian by the Planulata and Crassicosta zones; and the upper Toarcian by the Hillebrandti and Yakounensis zones. Section 5 on the Yakoun River in the Queen Charlotte Islands is designated the stratotype for the Planulata, Crassicosta, and Hillebrandti zones; section 3 on the Yakoun River is designated the stratotype for the Yakounensis Zone; an ideal stratotype for the Kanense Zone is not presently known. Reference sections further illustrating the faunal associations that characterize the zones are designated in eastern Oregon (Snowshoe Formation) and northern British Columbia (Spatsizi Group). The Dactylioceratidae, Harpoceratinae, and Hildoceratinae provide the most important zonal indicators for the lower Toarcian; Dactylioceratidae, Phymatoceratinae, and Bouleiceratinae for the middle Toarcian; and Phymatoceratinae, Grammoceratinae, and Hammatoceratinae for the upper Toarcian. Phymatoceras hillebrandti is described as a new species.

The genus Odontocepheus (Acari: Oribatida: Carabodidae) in North America, with description of a new species

1995 ◽  
Vol 73 (11) ◽  
pp. 1983-1990 ◽  
Author(s):  
R. Marcel Reeves
Keyword(s):  
New Species ◽  
North America ◽  
West Virginia ◽  
Leaf Litter ◽  
North American ◽  
North American Species ◽  
The North ◽  
Rotten Wood ◽  
A New Species

Adults of Odontocepheus rumbleseatus n.sp. are described, the second Odontocepheus species known from North America. An unusual, deep posterior depression on the notogaster easily separates this species from all others in the genus Odontocepheus. Specimens were collected from hardwood leaf litter and rotten wood. The known distribution is Illinois and West Virginia south to northern Florida. Additional characters for separating the North American species O. oblongus (Banks) from O. elongatus (Michael) in Europe are presented, and the presence of O. elongatus in North America is documented.

A New Species of Paradacerla from Mexico, and Synopsis of the Genus in North America (Hemiptera: Miridae)

1959 ◽  
Vol 91 (2) ◽  
pp. 122-126 ◽  
Author(s):  
Leonard A. Kelton ◽  
Harry H. Knight
Keyword(s):  
New Species ◽  
North America ◽  
North American ◽  
Posterior Margin ◽  
The North ◽  
A New Species

Carvalho and Usinger (1957) divided the North American genus Dacerla Signoret, 1881, into two. Dacerla now contains those species with a spinelike projection on the posterior margin of the pronotum, and Paradacerla Carvalho and Usinger contains those species wqithout a spinelike projection.In this paper Paradacerla species and Dacerla mediospinosa are compared, especially concerning the genitalic characters, and a new species, P. hirsuta, is described. Distinguishing external characters of the species and a key toParadacerla are provided

scholarly journals A new species of Placiphorella (Polyplacophora: Mopaliidae) from the North American Pacific coast

The Festivus ◽  
2019 ◽  
Vol 51 (2) ◽  
pp. 103-107
Author(s):  
Roger Clark
Keyword(s):  
New Species ◽  
North America ◽  
North American ◽  
Deep Sea ◽  
Pacific Coast ◽  
The North ◽  
The Pacific ◽  
A New Species

A new deep-sea chiton of the genus Placiphorella Dall, 1879, Placiporella laurae n. sp. is described from the Pacific coast of North America. It is compared with its congener Placiphorella pacifica Berry, 1919, from which it differs primarily by having granular valves, lacking false beaks, a papillose girdle, and the characteristics of its girdle spicules

Redescription of Parastenocaris brevipes Kessler and description of a new species of Parastenocaris (Copepoda: Harpacticoida: Parastenocarididae) from the U.S.A.

1995 ◽  
Vol 73 (1) ◽  
pp. 173-187 ◽  
Author(s):  
Janet W. Reid
Keyword(s):  
New York ◽  
New Species ◽  
North America ◽  
New Hampshire ◽  
North American ◽  
Lake Biwa ◽  
Species Group ◽  
Undescribed Species ◽  
Distal Half ◽  
A New Species

Parastenocaris brevipes Kessler is redescribed and its presence in North America is established through comparison of specimens from the U.S.A., Finland, and Germany. Parastenocaris wilsoni Borutskii, Parastenocaris starretti Pennak, Parastenocaris biwae Miura, and Parastenocaris sp. 2 Strayer (Strayer, D.L. 1988. Stygologia, 4: 279–291.) are assigned to the synonymy of P. brevipes. Biwaecaris Jakobi is a synonym of Parastenocaris Kessler. Some North American records of P. brevipes or P. starretti refer in fact to P. brevipes, other records to a presently undescribed species. Newly verified records of P. brevipes include Massachusetts, Michigan, New Hampshire, New York, Virginia, and Wisconsin in the U.S.A., and Lake Biwa, Japan. Parastenocaris trichelata, new species, is described from Virginia, U.S.A. The taxon is distinguished in both sexes by the combination of the long slender caudal ramus with all setae inserted in the distal half and by the medial spine of the leg 1 basipodite, and in the male by the leg 4 with slender hyaline endopodite and 3 spines on the basipodite medial to the endopodite. The new species little resembles any known North American parastenocaridid, nor is it assignable to any presently defined species-group in the genus.

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