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Articles 991 - 1020 of 1038

Full-Text Articles in Life Sciences

The Taxonomy And Biology Of Strauzia (Diptera: Tephritidae), W. Bryan Stoltzfus Jan 1988

The Taxonomy And Biology Of Strauzia (Diptera: Tephritidae), W. Bryan Stoltzfus

Journal of the Iowa Academy of Science: JIAS

The North American genus Strauzia is revised. Five new species are included with keys to adults of the 12 known species. Host plant, important larval characteristics, and life cycle information are given for 11 of the species. The evolution of the genus is discussed and 14 host plants are reported. All species bore in the stems of Asteraceae, pupariate in the crown area or in the soil, and are univoltine.


Taxonomic Notes On Carex (Cyperaceae) Of Austral South America, Gerald A. Wheeler Jan 1988

Taxonomic Notes On Carex (Cyperaceae) Of Austral South America, Gerald A. Wheeler

Aliso: A Journal of Systematic and Floristic Botany

The name Carex poeppigii (sect. Echinochlaenae) is validated and a new combination in South American Carex, C. vixdentata (sect. Spirostachyae), is made here. Also, the taxonomic status of C. aueri is discussed, and this name is placed in the synonymy of C. reichei (sect. Arenariae).


Astralagus Ertterae (Fabaceae), A New Species From The Southern Sierra Nevada, Rupert C. Barneby, James R. Shevock Jan 1987

Astralagus Ertterae (Fabaceae), A New Species From The Southern Sierra Nevada, Rupert C. Barneby, James R. Shevock

Aliso: A Journal of Systematic and Floristic Botany

Astragalus ertterae, a new species from pinyon pine woodlands, southern Sierra Nevada, Kern County, California, is described and illustrated. This remarkable new species is morphologically closest to A. bicristatus in sect. Bicristati but differs in its dwarf stature, pilose indumentum, short peduncles, somewhat smaller flowers, and especially in a pod only half as long and proportionately twice as plump.


Brongniartia Sousae (Fabaceae: Fabiodeae), A New Species From The Isthmus Of Tehuantepec, Oaxaca Mexico, Oscar Dorado Jan 1987

Brongniartia Sousae (Fabaceae: Fabiodeae), A New Species From The Isthmus Of Tehuantepec, Oaxaca Mexico, Oscar Dorado

Aliso: A Journal of Systematic and Floristic Botany

A new species, Brongniarlia sousae, endemic to the region of Tehuantepec, Oaxaca, Mexico, is described and illustrated. Its affinities with B. parvifolia Rose are discussed and habitat data are given.


Revision Of The Genus Anoda (Malvaceae), Paul A. Fryxell Jan 1987

Revision Of The Genus Anoda (Malvaceae), Paul A. Fryxell

Aliso: A Journal of Systematic and Floristic Botany

A revision of the genus Anoda is presented that recognizes 23 species, of which ten are described as new. The genus includes annual herbs, subshrubs, and occasionally shrubs and occurs from the southern United States to Bolivia, Argentina, and Chile. Most of this distributional range, however, is accounted for by a single species, A. cristata, which also occurs as an adventive in a few other parts of the world. The genus is principally Mexican, all of the species occurring within that country. Anoda is closely allied to the genus Periptera, also a Mexican genus, and the two genera share …


New Or Noteworthy Species Of Flowering Plants From The Sierra Madre De Sur Of Guerrero And Michoacán, Mexico, Paul A. Fryxell, Stephen D. Koch Jan 1987

New Or Noteworthy Species Of Flowering Plants From The Sierra Madre De Sur Of Guerrero And Michoacán, Mexico, Paul A. Fryxell, Stephen D. Koch

Aliso: A Journal of Systematic and Floristic Botany

The Sierra Madre del Sur of Pacific coastal Mexico has been of limited accessibility and therefore not well explored botanically. Only G. B. Hinton and E. Langlasse have made significant collections from the area. More recent collections by the authors have resulted in the recognition of nine new species, described herein as follows: Acanthaceae—Elytraria rnexieana; Malvaceae—Bastardiastrurn batesii, Gossypiurn schwendirnanii, Hibiscus zygornorphus, Kosteletzkya flavicentrum, Periptera lobelioides, Sida fastuosa, and Sida prolifiea; and Tumeraceae—Piriquetia mexieana. Other species meriting specific comment include Dioseorea insignis (Dioscoreaceae), Anotea flavida (Malvaceae), and Helieteres rekoi …


Hirschmanniella Pomponiensis N. Sp. (Nemata: Pratylenchidae), Parasitic On Bulrush, Scirpus Robustus Pursh, Fawzia Abdel-Rahman, Armand R. Maggenti Jan 1987

Hirschmanniella Pomponiensis N. Sp. (Nemata: Pratylenchidae), Parasitic On Bulrush, Scirpus Robustus Pursh, Fawzia Abdel-Rahman, Armand R. Maggenti

Harold W. Manter Laboratory of Parasitology: Faculty Publications

A new species of Hirschmanniella was found in bulrush roots; LM and SEM morphological studies revealed that it is distinct from other species in the genus. Therefore, it is designated Hirschmanniella pomponiensis n. sp. Six lips are fused to form a hexagonal labial plate, six inner sensilla encircle the stoma opening, and four cephalic sensilla open in the corners of subdorsal and subventral lips. Cephalic lip region consists of six or seven annuli. The female has incomplete areolation in the lateral field, the intestine overlaps the rectum, the tail tip is pointed and without annulation.


Marsupial And Monotreme Enamel Structure, K. S. Lester, A. Boyde, C. Gilkeson, M. Archer Oct 1986

Marsupial And Monotreme Enamel Structure, K. S. Lester, A. Boyde, C. Gilkeson, M. Archer

Scanning Microscopy

We present some recent developments in our understanding of two basic questions: the origin, extent, nature and course of marsupial enamel tubules; and the characterisation of monotreme enamel, more particularly, the prismatic nature of platypus enamel.

Methods used included SEM of methacrylate casts of marsupial enamel tubules, worn and cut surfaces of whole marsupial teeth, developing and erupted platypus teeth, and a well-developed molar of the newly discovered Miocene ornithorhynchid Obdurodon sp., and tandem scanning reflected light microscopy of intact marsupial teeth.

We conclude that there are significant species differences with respect to prism shape, row formation and tubule disposition …


Laboulbeniales On Semiaquatic Hemiptera. V. Triceromyces, Richard K. Benjamin Jan 1986

Laboulbeniales On Semiaquatic Hemiptera. V. Triceromyces, Richard K. Benjamin

Aliso: A Journal of Systematic and Floristic Botany

Six species of Triceromyces (Laboulbeniales), including the type, T. balazucii (on Hebridae), parasitic on semiaquatic Hemiptera, were studied at the light-microscopic level. Descriptions are provided for all of the taxa, and features of developmental morphology are described, compared, and illustrated with photographs and line drawings. Four species are described as new: T. hebri (on Hebridae), T. hydrometrae (on Hydrometridae), and T. biformis and T. bullatus (on Mesoveliidae). The species growing on Hebridae and Hydrometridae are monoecious. The two species on Mesoveliidae develop monoecious and dioecious morphs, which occur together on the same host individual. This phenomenon is recognized and described …


Taxonomy Of The Allium Tribracteatum (Alliaceae) Complex, William R. Mortola, Dale W. Mcneal Jan 1985

Taxonomy Of The Allium Tribracteatum (Alliaceae) Complex, William R. Mortola, Dale W. Mcneal

Aliso: A Journal of Systematic and Floristic Botany

Allium tribracteatum and related species present a confusing array in California. Previous attempts at classification have been largely unsuccessful and keys that are available are unworkable. Herbarium and field studies were initiated to ascertain if previously overlooked characteristics could be found that would elucidate relationships within the group. Members of the complex were examined morphologically and cytologically. Based on these investigations four of the seven previously described taxa are considered valid: A. cratericola, A. obtusum, A. tribracteatum, and A. yosemitense. Allium tribracteatum is redefined and A. obtusum is divided into two varieties. Allium obtusum var. conspicuum …


Taxonomy In Aspen: Ecology And Management In The Western United States, Kimball T. Harper, John D. Shane, John R. Jones Jan 1985

Taxonomy In Aspen: Ecology And Management In The Western United States, Kimball T. Harper, John D. Shane, John R. Jones

Aspen Bibliography

No abstract provided.


Morphology And Relationships Of A New Species Of Microsomyces (Ascomycetes: Laboulbeniales) From Illinois, Richard K. Benjamin Jan 1985

Morphology And Relationships Of A New Species Of Microsomyces (Ascomycetes: Laboulbeniales) From Illinois, Richard K. Benjamin

Aliso: A Journal of Systematic and Floristic Botany

Microsomyces telephani, a new species of Laboulbeniaceae, is described from collections found on Telephanus velox (Coleoptera: Cucujidae) from Illinois. Features of development and maturity of the new species are illustrated with photographs and line drawings. Microsomyces telephani differs from the type and previously only known species of the genus, M. psammoechi, in its larger, more highly corticated receptacle, which bears secondary appendages, and in its larger primary appendage, which typically bears several antheridial phialides. Among known genera of Laboulbeniales, Microsomyces is thought to be most closely related to Cucujomyces.


A New Gall-Forming Species Of Anguina Scopoli, 1777 (Nemata: Anguinidae) On Bluegrass, Poa Annua L., From The Coast Of California, I. Cid Del Prado Vera, Armand R. Maggenti Oct 1984

A New Gall-Forming Species Of Anguina Scopoli, 1777 (Nemata: Anguinidae) On Bluegrass, Poa Annua L., From The Coast Of California, I. Cid Del Prado Vera, Armand R. Maggenti

Harold W. Manter Laboratory of Parasitology: Faculty Publications

Anguina pacificae n. sp. is described and illustrated from stem galls on bluegrass, Poa annua L., from golf courses along coastal California. The females are characterized by constrictions in the anterior and posterior connections of the isthmus with the respective parts of the esophagus, the long multicellular columella, and the sharply pointed tail tip. Males are dorsally curved after death; body width is increased markedly after 13 annuli in both sexes, and the tail is conical and with an acute terminus.


Systematics And Palynology Of Picrodendron Further Evidence For Relationship With The Oldfieldioideae (Euphorbiaceae), W. John Hayden, W. T. Gillis, D. E. Stone, C. R. Broome, G. L. Webster Jan 1984

Systematics And Palynology Of Picrodendron Further Evidence For Relationship With The Oldfieldioideae (Euphorbiaceae), W. John Hayden, W. T. Gillis, D. E. Stone, C. R. Broome, G. L. Webster

Biology Faculty Publications

Although known to botanical science for 285 years, the genus Picrodendron Planchon has been poorly understood for most of this time. The most pervasive problem has been that of discerning familial relationships, and there have been additional difficulties in typifying the generic name (Hayden & Reveal, 1980) and in distinguishing its three nominate species. This paper provides a systematic treatment for Picrodendron and demonstrates its relationships with Euphorbiaceae subfam. Oldfieldioideae Kohler & Webster as evidenced by data on gross morphology, palynology, anatomy, and cytology.


Rhizonema Sequoiae N. Gen. N. Sp. From Coast Redwood Sequoia Sempervirens (D. Don) Endl., I. Cid Del Prado Vera, B. F. Lownsbery, Armand R. Maggenti Jul 1983

Rhizonema Sequoiae N. Gen. N. Sp. From Coast Redwood Sequoia Sempervirens (D. Don) Endl., I. Cid Del Prado Vera, B. F. Lownsbery, Armand R. Maggenti

Harold W. Manter Laboratory of Parasitology: Faculty Publications

Rhizonema sequoiae n. gen. n. sp. is described from the roots of Coast Redwood, Sequoia sempervirens (D. Don) Endl., growing near Lake Lagunitas, Marin County, California. Rhizonema females are annulated over their entire bodies, are wholly embedded in host tissue, and secrete an abundant amount of gel material. Mature females do not form a cyst. The vulva is located on a large posterior terminal cone, and the anus is on the dorsal vulval lip. Esophageal glands of the second-stage larvae fill more than half of the body cavity. Tails of the vermiform males are blunt, and a cloacal tubus is …


Taxonomy And Distribution Of Edotea (= Tropedotea) Lyonsi (Menzies And Kruczynski, 1983) N. Comb. (Crustacea: Isopoda: Idoteidae), Gary D. Goeke, Richard W. Heard Jr. Jan 1983

Taxonomy And Distribution Of Edotea (= Tropedotea) Lyonsi (Menzies And Kruczynski, 1983) N. Comb. (Crustacea: Isopoda: Idoteidae), Gary D. Goeke, Richard W. Heard Jr.

Gulf and Caribbean Research

Tropedotea lyonsi Menzies and Kruczynski, 1983, is reported from the waters off Alabama southeastward to Cape Romano, Florida. The monotypic genus Tropedotea was recently erected on the basis of coxal plates of pereonites V to VI1 visible in dorsal view and a reduced number of articles in both antennae. Pereonites V to VI11 are also visible in dorsal view in Edotea Guérin-Ménéville, 1843, and the number of articles in antenna 1 and 2 of Tropedotea Menzies and Kruczynski, 1983, is the same as in Edotea. Hence Tropedotea lyonsi is assigned to the genus Edotea and Tropedotea is designated a …


Proteins And Surface Proteins Of Leishmania Promastigotes And Their Possible Relevance To The Characterisation Of Strains, R. Ramasamy, H. Jamnadas, M. J. Mutinga Jan 1981

Proteins And Surface Proteins Of Leishmania Promastigotes And Their Possible Relevance To The Characterisation Of Strains, R. Ramasamy, H. Jamnadas, M. J. Mutinga

All Peer-Reviewed Publications

Ramasamy R., Jamnadas H. & Mutinga M.J. 1981. Proteins and surface proteins of Leishmania promastigotes and their possible relevance to the characterisation of strains. International Journal for Parasitology 11: 387-390. Two strains of Leishmania isolated from phlebotomine flies and another one from a patient with kala-azar were grown in culture as promastigotes. They were analysed for protein composition and surface proteins by polyacrylamide gel electrophoresis after surface radiolabelling. Differences were observed in the characteristic patterns of proteins and surface proteins between the two strains that are likely to be Leishmania donovani and the other strain. Such differences may prove valuable …


Proposal For The Conservation Of The Generic Name Picrodendron Grisebach (1859) Against Picrodendron Planchon (1846) (Euphorbiaceae), W. John Hayden, James L. Reveal Aug 1980

Proposal For The Conservation Of The Generic Name Picrodendron Grisebach (1859) Against Picrodendron Planchon (1846) (Euphorbiaceae), W. John Hayden, James L. Reveal

Biology Faculty Publications

Petalacte has been in continuous use for this genus of 1-3 species since proposed by D. Don. The only exception was Lessing's misuse of Petalolepis Cassini, from which he excluded the two original Australian species and substituted two from S. Africa. Lessing was not followed by later authors.T he genus was recently revised by Lundgren (in Bot. Notiser 127: 119-124. 1974) and this revision may be consulted for full references.


Eucalypts Of Western Australia, C A. Gardner, T E.H. Alpin Jun 1979

Eucalypts Of Western Australia, C A. Gardner, T E.H. Alpin

Bulletins 4000 -

The series Trees of Western Australia, which appeared in The Journal of Agriculture of Western Australia, was commenced in 1952 by Charles Austin Gardner, Government Botanist and Curator of the Western Australian Herbarium from 1929 to1960. Until his death in 1970 Gardner published in the series 29 articles, dealing with 117 species of Eucalyptus, the last article appearing in 1966.

The articles are of historical and scientific interest. They contain valuable original information on the phytogeography and taxonomy of over half of the Western Australian species of Eucalyptus, based largely on Gardner's personal observations made in the course …


Order Anseriformes: From Check-List Of Birds Of The World, Paul A. Johnsgard Jan 1979

Order Anseriformes: From Check-List Of Birds Of The World, Paul A. Johnsgard

Paul Johnsgard Collection

SUBORDER ANSERES
FAMILY ANATIDAE

SUBFAMILY ANSERANATINAE
GENUS ANSERANAS LESSON

SUBFAMILY DENDROCYGNINAE
GENUS DENDROCYGNA SWAINSON

GENUS THALASSORNIS EYTON

SUBFAMILY ANSERINAE
GENUS CYGNUS BECHSTEIN

GENUS ANSER BRISSON

GENUS BRANTA SCOPOLI

GENUS CEREOPSIS LATHAM

GENUS STICTONETTA REICHENBACH

SUBFAMILY TADORNINAE
GENUS CYANOCHEN BONAPARTE

GENUS CHLOEPHAGA EYTON

GENUS ALOPOCHEN STEJNEGER

GENUS TADORNA FLEMING

GENUS TACHYERES OWEN

SUBFAMILY ANATINAE
GENUS PLECTROPTERUS STEPHENS

GENUS CAIRINA FLEMING

GENUS PTERONETTA SALVADORI

GENUS SARKIDIORNIS EYTON

GENUS NETTAPUS BRANDT

GENUS CALLONETTA DELACOUR

GENUS AIX BOlE

GENUS CHENONETTA BRANDT

GENUS AMAZONETTA BOETTICHER

GENUS MERGANETTA GOULD

GENUS HYMENOLAIMUS GRAY

GENUS ANAS LINNAEUS

GENUS MALACORHYNCHUS SWAINSON

GENUS MARMARONETTA REICHENBACH

GENUS RHODONESSA REICHENBACH

GENUS NETTA …


Sir Joseph Banks And The Botany Of Captain Cook’S Three Voyages Of Exploration, Phyllis I. Edwards Sep 1978

Sir Joseph Banks And The Botany Of Captain Cook’S Three Voyages Of Exploration, Phyllis I. Edwards

Pacific Studies

No abstract provided.


A Guide To The Dispersal Of Zoological Material From Captain Cook’S Voyages, P. J. P. Whitehead Sep 1978

A Guide To The Dispersal Of Zoological Material From Captain Cook’S Voyages, P. J. P. Whitehead

Pacific Studies

No abstract provided.


The Botanical Results Of Captain Cook’S Three Voyages And Their Later Influence, William T. Stearn Apr 1978

The Botanical Results Of Captain Cook’S Three Voyages And Their Later Influence, William T. Stearn

Pacific Studies

No abstract provided.


Genetics Of Quaking Aspen, Dean W. Einspahr, Lawson L. Winton Jan 1976

Genetics Of Quaking Aspen, Dean W. Einspahr, Lawson L. Winton

Aspen Bibliography

No abstract provided.


A Taxonomic And Ecologic Study Of The Riverbottom Forest On St. Mary River, Lee Creek And Belly River In Southwest Alberta, Canada, Robert Keith Shaw Aug 1974

A Taxonomic And Ecologic Study Of The Riverbottom Forest On St. Mary River, Lee Creek And Belly River In Southwest Alberta, Canada, Robert Keith Shaw

Theses and Dissertations

The riverbottom forest community of St. Mary River, Lee Creek and Belly River in southwest Alberta, Canada is a unique ecological entity characterized by poplar species having their major Alberta distribution along these streams. Stands in the community are dominated by three tree species, six shrub species and nine herb species. Establishment of the community is dependent on climate and substrate; destruction is the result of progressive lateral stream-flow erosion. Soils are sandy loams above gravel, with pH values of 7.7 to 8.0 and soluble salt concentration of 176 to 458 parts per million. Trees in mature stands averaged 23.0 …


A Cytological, Morphological, And Anatomical Study Of Elymus Simplex, Stephan L. Hatch May 1972

A Cytological, Morphological, And Anatomical Study Of Elymus Simplex, Stephan L. Hatch

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The purpose of this paper is to clarify the taxonomy, report the chromosome number, report meiotic chromosome behavior, and give the anatomy of Elymus simplex Scribner and Williams. The isotype of Elymus simplex and the type description were used to compare this and other species that have been confused.

Cytological and anatomical methods are reported as an aid in clarification of the taxonomic problem that has been associated with this species.


Notes On The Biology Of Emphoropsis Pallida Timberlake, George E. Bohart, Phillip F. Torchio, Y. Maeta, R. W. Rust Jan 1972

Notes On The Biology Of Emphoropsis Pallida Timberlake, George E. Bohart, Phillip F. Torchio, Y. Maeta, R. W. Rust

All PIRU Publications

No abstract provided.


Phenetic Affinities In Small Populations Of New York Aspens, C.M. Harrison, F.A. Valentine Jan 1972

Phenetic Affinities In Small Populations Of New York Aspens, C.M. Harrison, F.A. Valentine

Aspen Bibliography

According to Anderson (1962) much of the variation in wild populations of plants is attributable to occasional introgressive hybridization.


The Feasibility Of Avian Karyotypes In Taxonomy, Gerald Francis Shields Jan 1970

The Feasibility Of Avian Karyotypes In Taxonomy, Gerald Francis Shields

All Master's Theses

The purpose of this paper is twofold: first, to evaluate the usefulness of various karyotypic procedures using domesticated and passerine birds and second, to comment on the validity of the application of karyotypic data to taxonomy.


A New Species Of Dufourea From California *Hymenoptera: Halictidae), George E. Bohart Jan 1969

A New Species Of Dufourea From California *Hymenoptera: Halictidae), George E. Bohart

All PIRU Publications

No abstract provided.