Pollen morphology in the genus Myriophyllum (Haloragaceae)

1978 ◽  
Vol 56 (8) ◽  
pp. 976-982 ◽  
Author(s):  
S. G. Aiken
Keyword(s):  
Electron Micrographs ◽  
North American ◽  
Pollen Morphology ◽  
North American Species ◽  
Pollen Size ◽  
Scanning Electron Micrographs ◽  
Pollen Maturation ◽  
Pore Number ◽  
Scanning Electron ◽  
Made In

Pollen size and aperture number are reported for nine North American species of Myriophyllum. For seven of these, scanning electron micrographs are provided. The wall sculpture of M. alterniflorum is microrugulate and that of eight other species is microverrucate. In M. exalbescens and M. tenellum, microvermcae develop late in pollen maturation. Myriophyllum farwellii, a species that flowers underwater, has asymmetrically arranged pores and variation in pore number. An estimated 90% of M. farwellii pollen, from collections made in 1975 and 1976, had collapsed: the apparently sterile grains suggest that this species is at least partly apomictic. A pollen key to the species is provided.

LARVAL SKETCHES OF SOME MICROLEPIDOPTERA, CHIEFLY NORTH AMERICAN

1972 ◽  
Vol 104 (S88) ◽  
pp. 7-83 ◽  
Author(s):  
Margaret Rae MacKay
Keyword(s):  
Electron Micrographs ◽  
North American ◽  
Scanning Electron Micrographs ◽  
Structural Details ◽  
Scanning Electron

AbstractPresented here, with notes, are 55 plates of illustrations: 48 are larval sketches representing 48 species in 18 families of Microlepidoptera; the remaining seven are scanning electron micrographs of larvae of three of the families, Lyonetiidae, Bucculatrigidae, and Stigmellidae. The illustrations suggest interesting affinities in some instances, are useful as identification aids, and show structural details not hitherto observed or recognized as important taxonomically.

Three new species of Calliandra in section Monticola (Leguminosae, Mimosoideae) from Chapada Diamantina, Bahia, Brazil

Phytotaxa ◽  
2014 ◽  
Vol 164 (2) ◽  
pp. 104
Author(s):  
Elvia Rodrigues Souza ◽  
Adelina Vitória Ferreira Lima ◽  
Luciano Paganucci Queiroz ◽  
Francisco A. Ribeiro Santos
Keyword(s):  
New Species ◽  
Light Microscopy ◽  
Electron Micrographs ◽  
Pollen Morphology ◽  
Identification Key ◽  
Similar Species ◽  
Scanning Electron Micrographs ◽  
Chapada Diamantina ◽  
Three New Species ◽  
Scanning Electron

Three new species of Calliandra section Monticola are described and illustrated: C. bromelioides, C. lewisii and C. oroboensis. All of them are endemic to the Chapada Diamantina, Bahia, Brazil. In addition we present a study of the pollen morphology using light microscopy and scanning electron micrographs. An identification key for the three new species and the most morphologically similar species in section Monticola is also provided. 

The spores of Dryopteris filix-mas and related taxa in North America

1974 ◽  
Vol 52 (8) ◽  
pp. 1923-1926 ◽  
Author(s):  
D. M. Britton ◽  
A. C. Jermy
Keyword(s):  
North America ◽  
Electron Micrographs ◽  
North American ◽  
Scanning Electron Micrographs ◽  
Spore Morphology ◽  
European Species ◽  
Scanning Electron

Scanning electron micrographs of spores of Dryopteris filix-mas (L.) Schott, D. abbreviata (DC.) Newman, D. caucasica Fraser-Jenkins & Corley, D. arguta (Kaulf.) Watt, D. marginalis (L.) Gray, and D. fragrans (L.) Schott var. remotiuscula Komarov are presented. North American D. filix-mas is compared with the European species and the origin of this tetraploid is discussed using the available evidence from spore morphology, cytogenetics, and chromatography.

Pollen morphology of Pacific Northwestern Polemonium species in relation to paleoecology and taxonomy

1979 ◽  
Vol 57 (21) ◽  
pp. 2428-2442 ◽  
Author(s):  
Rolf W. Mathewes
Keyword(s):  
Light Microscopy ◽  
Electron Micrographs ◽  
Pollen Analysis ◽  
Pollen Morphology ◽  
Scanning Electron Micrographs ◽  
Taxonomic Treatment ◽  
Close Affinity ◽  
Pollen Types ◽  
Quaternary Paleoecology ◽  
Scanning Electron

Six morphological types of Polemonium pollen are described, including P. micranthum which is the only taxon considered to be consistently identifiable to species. A key to the pollen types as seen in light microscopy is presented along with light and scanning electron micrographs of each type. The palynological evidence supports the taxonomic treatment of P. uciitiflorum and P. occidentale as subspecies of P. caeruleum, and supports a close affinity between P. pectinatum and P. foliosissimum. Brief summaries of the present-day ecology and distribution of Pacific Northwestern Polemonium species are presented. The application of indicator pollen analysis in Quaternary paleoecology is discussed, with special references to examples of paleoenvironmen-tal inference using Polemonium pollen types.

Geographic variation in the pollen of Silene latifolia (S. alba, S. pratensis): a quantitative morphological analysis of population data

1984 ◽  
Vol 62 (6) ◽  
pp. 1259-1267 ◽  
Author(s):  
H. C. Prentice ◽  
O. Mastenbroek ◽  
W. Berendsen ◽  
P. Hogeweg
Keyword(s):  
Electron Micrographs ◽  
Pollen Morphology ◽  
Population Data ◽  
Morphological Characters ◽  
Silene Latifolia ◽  
Character State ◽  
Scanning Electron Micrographs ◽  
Components Analysis ◽  
Geographic Separation ◽  
Scanning Electron

There is a geographic separation of the two pollen morphs in European Silene latifolia, with the changeover zone running northwest – southeast from the Netherlands to Greece. Reticulate grains are characteristic of western populations and microechinate grains are characteristic of eastern populations. The present study is based on a sample of one pollen grain from each of the male individuals from each of 32 greenhouse-grown populations representing the distribution of S. latifolia across Europe. The 316 grains were scored for 11 morphological characters (61 character states) under the light microscope. Population character-state frequencies were analysed using cluster analysis and principal components analysis. The results support the geographic distribution of pollen morphs, but the populations with the typical eastern and western morphs are linked by a belt of populations with intermediate pollen morphology. Intermediate pollen is characteristic of populations in a zone from Belgium to Italy; the zone represents a region of relatively rapid morphological change and is coincident with a similar zone of change in seed and flavonoid characters in S. latifolia. Scanning electron micrographs from each population provided further information on the pollen morphology and complemented the light microscopical observations. The variation pattern is illustrated by scanning electron micrographs from selected populations.

Pollen morphology of Rhynchosia and Eriosema (Fabaceae)

1973 ◽  
Vol 51 (12) ◽  
pp. 2395-2399 ◽  
Author(s):  
E. K. Ramcharan ◽  
J. H. McAndrews ◽  
J. W. Grear
Keyword(s):  
Electron Micrographs ◽  
Light Microscope ◽  
Pollen Morphology ◽  
Scanning Electron Micrographs ◽  
Opposite Pole ◽  
Pollen Characters ◽  
Single Grain ◽  
Scanning Electron

The closely related genera Rhynchosia and Eriosema have tricolporate pollen. Twenty-two species of Rhynchosia and nine species of Eriosema were examined with the light microscope. Most of the species have isopolar-type grains, but 11 species have the hitherto rarely described heteropolar-type pollen, i.e. on a single grain, the ends of the colpi subtend a greater area at one pole than at the opposite pole. Duplicate examination of 13 species indicates that polarity types are constant within those species. While the genera cannot be separated on the basis of pollen morphology alone, there are some pollen characters which embrace most species in any one genus. Eriosema species are mostly heteropolar (67%) and Rhynchosia are predominantly isopolar (77%). The lumina of the reticulum of Rhynchosia tend to be smaller than those of Eriosema and, with one exception, the muri of Eriosema have acute tops while those of Rhynchosia are obtuse. Scanning electron micrographs illustrate pollen morphology.

A revision of the genus Pachyrhinus Schӧnherr 1823 (Coleoptera: Curculionidae, Entiminae) in the Nearctic Region

Zootaxa ◽  
2021 ◽  
Vol 4999 (6) ◽  
pp. 501-533
Author(s):  
JOSEPH BENZEL ◽  
DONALD E. BRIGHT
Keyword(s):  
North America ◽  
Electron Micrographs ◽  
North American Species ◽  
Scanning Electron Micrographs ◽  
Scale Morphology ◽  
Diagnostic Characters ◽  
The North ◽  
Pinus Spp ◽  
Nearctic Region ◽  
Scanning Electron

The North American species of the broad-nosed weevil genus Pachyrhinus Schönherr 1823 (Coleoptera: Curculionidae, Entiminae) are revised. Three species of Pachyrhinus are here recognized in North America: P. elegans (Couper 1865), P. californicus (Horn 1876), and P. cinereus (Casey 1888). Pachyrhinus lateralis (Casey 1888) and P. miscix (Fall 1901) are here designated as synonyms of P. elegans. Pachyrhinus crassicornis (Casey 1888) and P. albidus (Fall 1901) are here designated synonyms of P. cinereus (Casey 1888) The previously proposed synonymy of P. ferrugineus (Casey 1888) with P. californicus was confirmed. This revision includes detailed images of diagnostic characters as well as scanning electron micrographs of scale morphology for all species. A key to the Nearctic species of Pachyrhinus is provided. All Nearctic species of Pachyrhinus are considered minor pests of Pinus spp. [Pinaceae].

Illustrated key to genera and catalogue of Mymaridae (Hymenoptera) in America north of Mexico

Zootaxa ◽  
2020 ◽  
Vol 4773 (1) ◽  
pp. 1-411 ◽  
Author(s):  
JOHN T. HUBER ◽  
JENNIFER D. READ ◽  
SERGUEI V. TRIAPITSYN
Keyword(s):  
New Species ◽  
Electron Micrographs ◽  
North American ◽  
Valid Species ◽  
Scanning Electron Micrographs ◽  
Undescribed Species ◽  
Identification Keys ◽  
The North ◽  
Three New Species ◽  
Scanning Electron

Identification keys for females, and for males where known, to the 39 genera and 11 subgenera of Mymaridae in America north of Mexico are given. The genera are illustrated with over 1010 photographs and/or scanning electron micrographs. The 202 currently named and valid species reported from America north of Mexico are catalogued. Reliable host records are reported for 16 genera and almost 90 species from rearings in the region. The five genera represented by more than one subgenus in the region are: Anagrus Haliday, Anaphes Haliday, Erythmelus Enock, Kalopolynema Ogloblin, and Polynema Haliday. Five other genera are represented only by unnamed and possibly undescribed species. About 1000 literature references, mainly the North American ones, are listed. Three new species are described: Callodicopus floridanus Huber, sp. n., Neostethynium americanum Huber, sp. n., and Stephanocampta xanthogaster Huber, sp. n. Cosmocomoidea marilandica (Girault), stat. rev., is placed in synonymy under C. dolichocerus (Ashmead). Platypatasson Ogloblin is given subgeneric status as Platystethynium (Platypatasson Ogloblin), stat. rev. Corrections and additions to the mymarid fauna of Mexico by Guzmán-Larralde et al. (2017) are also given. 

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