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Topic: Genera

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In the News (Wed 22 May 19)

  Genus - Wikipedia, the free encyclopedia
In biology, a genus (plural genera) is a grouping in the classification of living organisms having one or more related and morphologically similar species.
It is, however, not allowed for two genera within the same kingdom to have the same name.
This explains why the platypus genus is Ornithorhynchus — although the name Platypus was chosen by George Shaw in 1799, that name had already been given to the ambrosia beetle by Johann Friedrich Wilhelm Herbst in 1793.
en.wikipedia.org /wiki/Genus   (349 words)

 List of genera in Caesalpinioideae   (Site not responding. Last check: )
Covers the genera of basidiomycota with stem and cap (Agarics, and Boletes) from Northern Europe.
Pterophyta Taxa List of all families and genera, with numbers of species and ranges.
Grass Genera of the World Descriptions and illustrations of over 800 grass genera by L. Watson and M. Dallwitz.
www.serebella.com /encyclopedia/article-List_of_genera_in_Caesalpinioideae.html   (412 words)

 InterCorr Software - Generic Framework for Generating Software Solutions in Materials & Corrosion
Genera assists in representing such an understanding in a computer-based framework.
Genera can be used to create characteristic computer applications, by engineers and scientists without a background in computing but with the decision making knowledge
Genera is equipped with a graphical interface that is designed to be intuitive and easy-to-use.
www.intercorr.com /software/genera.htm   (260 words)

 RedNova News - Science - Relative Abundance of Sepkoski's Evolutionary Faunas in Cambrian- Ordovician Deep Subtidal ...   (Site not responding. Last check: )
Genera were assigned to an evolutionary fauna if they belonged to a group designated as a member of a fauna by Sepkoski (1981).
The comparatively large proportion of individuals belonging to the Paleozoic EF for a given proportion of genera is a general feature of the assemblage data.
Linear product-moment correlation coefficients between the mean proportion of an evolutionary fauna in local assemblages and the equivalent proportion in Sepkoski's global genus compilation for six stratigraphic intervals in the Cambrian and Ordovician as in Figure 7.
www.rednova.com /news/display/?id=101556   (7803 words)

 Names in Current Use - Genera>
The decision to omit fossil genera was not taken lightly, and not without the endorsement of the palaeobotanists concerned.
Post 1957 names of new genera must be holotypified in order to be validly published (but see the previous chapter for the special case of avowed substitutes), and we were careful to provide type citations for all of them.
We are told that the genera of musci are the least well treated part of this inventory in several respects, but no concrete suggestions of improvement were made (and not even all comments received were made available to the editorial team by those to whom they had been addressed).
www.bgbm.org /iapt/ncu/genera/introduction.htm   (5676 words)

 Key to the lichen genera of the Guianas
Genera in " " concern provisional identifications or taxa of uncertain or provisional taxonomic position.
Genera in [ ] are known from surrounding areas and expected for the Guianas.
The genera Cladia, Cladina, and Cladonia may now be keyed to species using the Key to the Cladoniaceae of the Guianas, by Ted Ahti and Harrie Sipman, 1997.
www.mnh.si.edu /biodiversity/bdg/lichkey3.html   (840 words)

It reflects 23 years of the author's specialization in the taxonomy of a group typically adapted to arid, ruderal, hygric, and Arctic-alpine environments worldwide, and is illustrated by P. Eckel with 113 superb plates.
The family's 85 genera are reduced to 76 with new constructs in the Tortula-Desmatodon-Pottia complex reflecting an emphasis on gametophyte characters.
It resulted in fine resolution of relationships, a single hypothetical tree, recognition of several monotypic genera ancient groups, and indication that elements of the Pottiaceae are rather primitive mosses, related to Ptychomitrium, Timmia and Polytrichum.
www.mobot.org /plantscience/ResBot/Misc/GenPottAdvert.htm   (248 words)

 Contemporary Herpetology 2000 Number 2: Wilkinson and Drewes
If only the rhacophorid genera are analyzed with a hypothetical ancestor to polarize the states (as Liem did) then the tree with the basal (Aglyptodactylus, Mantidactylus) clade is shorter by one step (Figure 6), and character 1 takes six steps and character 14 takes three steps to evolve on the tree.
Our objective was to distinguish genera with multiple representatives from other such genera by characters or sets of characters, and better understand the relationships of species traditionally assigned to a certain genus but that are at odds with other members of that genus according to these characters.
The mantelline genera of Mantella and Mantidactylus were sister taxa based on the synapomorphy of an abbreviated mating contact, and the (Mantella, Mantidactylus) clade was sister to the Rhacophoridae based on the synapomorphy of intercalary elements.
www.nhm.ac.uk /hosted_sites/ch/ch/2000/2/index.htm   (11804 words)

 Monocots II -- Abstracts
Two genera, Pigafetta and Metroxylon, with distributions in central Malesia, Papuasia, and the west Pacific are not accommodated by this hypothesis, and explanations are complicated by controversy surrounding the geological evolution of Southeast Asia.
Several families and genera of monocots with a disjunct southern hemisphere distribution on the other hand seem to be younger than Cretaceous Gondwana, their present wide distributions then presumably being attained by dispersal during the Tertiary period.
Genera of Convallariaceae were used as multiple outgroups as well as a hypothetical taxon reconstructed from the morphological analysis.
www.science.uts.edu.au /sasb/monocotsIIAb1.html   (18471 words)

 Genera Palmarum   (Site not responding. Last check: )
A soft cover reprint of this comprehensive treatment of all genera of palms, including a hierarchy for the family, descriptions and keys to all genera, introductory chapters summarizing the latest information these most important plans, and an illustrated glossary.
In Genera Palmarum, the morphology, anatomy, ecology and distribution, fossil record, and evolution of the palms are discussed as an essential background to the classification.
Genera Palmarum is published at a time when interest in this most important but long neglected family is increasing.
www.palms.org /pubs/palmarum.htm   (298 words)

 Backstage Affair   (Site not responding. Last check: )
Genera McCanton is excited to have her play opening off-Broadway; this is her chance at the big time.
When he starts making suggestions about the play, Genera is reminded of another man who made suggestions about her play and then stole it from her.
When Genera is injured, Edward steps in to take care of her, their mutual lust takes over.
www.fallenangelreviews.com /October2004/Tewanda-BackstageAffair.htm   (369 words)

 Chalcid Literature
A reappraisal of Aphycus Mayr, Metaphycus Mercet, and allied genera.
Hayat, M. Notes on some genera of the Aphelinidae (Hymenoptera: Chalcidoidea), with comments on the classification of the family.
Subba Rao, B. The genera of Signiphoridae with description of a new genus.
www.sel.barc.usda.gov /hym/chalcids/Challit.htm   (2824 words)

 OrchidMania: Orchid Species of the World
or one of the other "mega genera," the species you are looking for may now be in a different genus...
Genera in bold have been revised to match the site's updated appearance, with recent taxonomic reorganizations factored into the overhaul.
Genera with a camera icon are illustrated with photographs and/or botanical lithographs.
www.orchids.org /species   (1234 words)

 Genera and Species in a Classification   (Site not responding. Last check: )
The aim of the classification is to group related genera or species together, rather than attempt to reflect relationships evenly.
For example, if a group of genera has been recognized as a family but a more recent study shows that these genera are specialized or highly modified members of another family, the genera are moved to the ‘new’ family but may be retained there as a subfamily, thereby keeping those related genera together.
A few genera or species are not placed within families in the classification.
www.fishbase.org /manual/fishbasegenera_and_species_in_a_classifi.htm   (589 words)

Jose Ricardo Palomares Garcia is the Curator of the Copepod Collection and Dr. Sergio Hernandez Trujillo is the Head of the Project for the Copepod Diversity in the region of Magdalena Bay, South Baja California.
The environmental and fishery relevance is based on the complexity of the fauna and the abundance of trade attractive resources, mainly fishing of minor pelagic fish.
The Autonomous University of Baja California is mainly focused on the identification and evaluation of regional phenomena and processes, both terrestrial and marine, on the proposal of solutions and precautionary measures to generated problems and impacts, as well as sustainable alternatives for a rational exploitation of biological resources.
www.conabio.gob.mx /remib_ingles/doctos/nodos_integran_remib_ing.html   (5018 words)

 Royal Botanic Gardens, Kew: Data and Publications - Vascular Plant Families and Genera   (Site not responding. Last check: )
The data presented here are taken from the publication Vascular Plant Families and Genera compiled by R. Brummitt and published by the Royal Botanic Gardens, Kew in 1992.
Acknowledgements of assistance from specialists, some statistics and explanatory notes may be found in the introduction to the book.
The recognised genera are those accepted in the Kew Herbarium in 1992.
www.rbgkew.org.uk /data/vascplnt.html   (141 words)

Elliptic genera correspond to doubly-periodic (elliptic) functions and retain many of the properties of the signature and the Â-genus which appear as limit cases of elliptic genera.
In particular, elliptic genera behave nicely in the presence of a Lie group action on a Spin manifold (rigidity theorem).
One of the main attractions of elliptic genera is in their connection to various areas of mathematics and physics: cobordism and K-theory, formal groups, modular forms, Lie group theory (both finite-dimensional and infinite-dimensional), string theory.
www.ms.uky.edu /~ochanine/index_files/what%20are%20elliptic%20genera.htm   (186 words)

 NCSE Resource   (Site not responding. Last check: )
The main difference between these two genera is that the third and fourth upper premolars of Orohippus have four cusps of roughly equal size, and the heel of the third lower molar is relatively shorter than in Hyracotherium (MacFadden, 1976).
Numerous genera of titanotheres have been described, and while their interrelationships are complicated, the overall trends in titanothere evolution are quite clear.
To be sure, there was some variation in Miocene and later genera, doming of the skull in some, and variations in the anterior dentition (incisors and canines), but for the most part later chalicotheres differed little from typical Miocene forms.
www.ncseweb.org /resources/articles/4661_issue_16_volume_5_number_2__4_10_2003.asp   (16817 words)

 Genera Corporation web site, Supplying Quality Autoparts by TYC
GENERA is committed to respecting your online privacy and recognizes your need for appropriate protection and management of any personally identifiable information ("Personal Information") you share with us.
GENERA encourages its younger visitors to get their parents' permission before providing any information to our website.
Although the nature of the Internet makes it impossible for GENERA to know the age of its visitors, it is unlikely that we will inadvertently collect personal information voluntarily submitted, as through conference registrations or order forms, because we require credit card account number, which should exclude all but the most precocious minor.
www.genera.com /privacy.cfm   (596 words)

 research.jpg   (Site not responding. Last check: )
Because of their morphological similarity, however, they may be disguised as belonging to one of the other cypripedioid genera listed along with other orchids in Appendix II of CITES.
Molecular analyses concentrated on some of the rarest cypripedioid orchids from the genera Paphiopedilum and Phragmipedium, which are sometimes poached from the wild and smuggled across international borders disguised as common species.
The set of DNA markers examined for this project are diagnostic of these genera, appear to be robust, and are suitable for rapid assay to avoid unnecessary complication in the legitimate trade of orchids listed only in CITES Appendix II.
www.selby.org /index.php?src=gendocs&link=iocc_morrison&category=Research   (412 words)

 A trnL-F cpDNA sequence study of the Condamineeae-Rondeletieae-Sipaneeae complex with implications on the phylogeny of ...
genera are considered to belong in the Naucleeae.
Genera in the C5 clade are generally shrubs or small trees with
The Cuban endemic genera Phyllomelia and Mazaea (the latter
www.amjbot.org /cgi/content/full/89/1/145   (6613 words)

 Searchable List of Names in the Lichen Family Parmeliaceae (Lichens), Botany, Smithsonian Institution.
As part of a modern trend in lichen systematics, Hale personally named twenty new genera of parmelioid lichens in an attempt to create smaller natural groups out of the confusing Parmelia s.
The large number of new genera and species that he and his colleagues recognized over fifteen years (1974-1989) were even confusing for specialists, so Hale produced an electronic database that allowed him to quickly look-up the accepted genus for a given epithet.
On 10 June 1989, Hale distributed a printed "List of Epithets in the Parmelioid Genera" produced from that database, with an accompanying letter, to many of his lichenological colleagues.
persoon.si.edu /parmeliaceae   (345 words)

 Flowering Plant Families, UH Botany
The Ericaceae are mostly shrubs comprising about 125 genera and 3,500 species.
The leaves are simple and alternate or sometimes opposite or whorled; stipules are absent.
The inverted urn-shaped or urceolate flowers illustrated here are common in several genera of the family.
www.botany.hawaii.edu /faculty/carr/eric.htm   (339 words)

 II. Variation under Nature. Species of the Larger Genera in Each Country Vary More Frequently Than the Species of the ...
Moreover, the species of the large genera which present any varieties, invariably present a larger average number of varieties than do the species of the small genera.
Both these results follow when another division is made, and when all the least genera, with from only one to four species, are altogether excluded from the tables.
And this certainly holds true, if varieties be looked at as incipient species; for my tables clearly show as a general rule that, wherever many species of a genus have been formed, the species of that genus present a number of varieties, that is of incipient species, beyond the average.
www.bartelby.com /11/2005.html   (428 words)

The Orchid genera table, combined with the Illustrated Orchid Compendium©, is an continual project of Camp Lot A Noise Tropicals (CLAN).
The Orchid Genera table, which follows on five pages, was extracted from several sources.
Newly described genera are added when found in the literature.
www.clanorchids.com /geninfo.html   (202 words)

 Dinosaur Genera List   (Site not responding. Last check: )
The Dinosaur Genera List is freely available to anyone who desires to publish it in book or magazine form, to link to it, or to display it at a website, provided only that George Olshevsky be informed of such publication or Internet display, and be properly credited as compiler.
Genus (plural: genera) is a major category invented in the mid-1750s by the botanist Carolus Linnaeus (or Karl von Linne) for his system of classifying nature.
Genera not presently considered to be dinosaurs (that is, those flagged with asterisks in their listings), are sorted into their own category and are not further subdivided.
members.aol.com /Dinogeorge/dinolist.html   (4430 words)

 Introduction   (Site not responding. Last check: )
Also, with continued field observations in both temperate and tropical regions, it became apparent to many of us that three genera could be easily recognized utilizing ecological characters as well as macro- and microscopic ones.
These characters are utilized in a Key to Genera.
The three recognized genera are: Collybia, Rhodocollybia, and Gymnopus.
www.nybg.org /bsci/res/col/colintro.html   (250 words)

 All The Dinosaurs That Lived   (Site not responding. Last check: )
The 775 genera are all the distinct dinosaur genera based on fossil body parts, from well founded to highly dubious, including nomina nuda, that I have come across in a 25-year search of the literature.
I estimate on the order of 50,000 dinosaur genera and up to half a million individual species populated the Mesozoic from the Middle Triassic through the end of the Cretaceous, a period of time longer than 160 million years.
Altogether, I estimate several thousand dinosaur genera were alive at any one time during the Mesozoic (but only about a hundred or two of the big dinosaurs), which is entirely in line with estimates for extant mammals, birds, and reptiles.
www.dinosauria.com /jdp/dino/num.htm   (352 words)

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