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Topic: Archaeognatha


  
  Archaeognatha
However, there is little evidence that this fossil is a member of Archaeognatha; it may instead be a member of the stem-group of insects or of stem-Dicondylia.
Morphology and classification of the extinct Archaeognatha and related taxa (Hexapoda).
Archaeognatha (Insecta) from the Krakatau Islands and the Sunda Strait area, Indonesia.
tolweb.org /Archaeognatha/8207   (800 words)

  
 Metasoma - Wikipedia, the free encyclopedia
In insects, it contains most of the digestive tract, respiratory system, and circulatory system, and the apical segments are typically modified to form genitalia.
In a few of the most primitive insects (the Archaeognatha), the metasomal segments bear small, articulated appendages called "styli", which are often considered to be vestigial.
There are also pre-apical appendages in most insect orders, called cerci, which may be multi-segmented and almost resembling a posterior pair of antennae; these may be variously modified, or lost entirely.
en.wikipedia.org /wiki/Metasoma   (288 words)

  
 Archaeognatha   (Site not responding. Last check: 2007-11-01)
Archaeognatha are similar in overall appearance to the Thysanura in that they are elongate and wingless with three caudal filaments.
Unlike the Thysanura, the eyes are large and meet in the middle, the body is cylindrical, the thorax is arched, and the mandibles articulate at only one point.
However, Wygodzynsky and Schmidt, in their survey of Archaeognatha of the Northeastern U.S. and adjacent Canada, stated that, "Machilids are abundant in genera and species in the southeastern and western United States and in Western Canada," so there may be more species in western Canada and Alaska.
www.uaf.edu /museum/ento/Insect_Omnibus/Archaeognatha   (230 words)

  
 Amazon.com: Archaeognatha   (Site not responding. Last check: 2007-11-01)
Archaeognatha (Handbook of Zoology, Volume 4, Arthropda : Insecta, Part 37) by Helmut Sturm and Ryuichiro Machida (Hardcover - Jun 2001)
In all Insecta, except Archaeognatha, mandibles are dicondylic, articulated...
In Machilidae (Archaeognatha) the posterior bridge is present,...
www.amazon.com /s?ie=UTF8&keywords=Archaeognatha&index=blended&page=1   (936 words)

  
 Checklist: South African Bristletails (Archaeognatha)
The distributions and the periods of adult activity are taken from Wygodzinsky (1955).
Information about the Archaeognatha and their phylogenetic position can be obtained from
This part of A Catalogue of South African Insects revised:
www.ru.ac.za /academic/departments/zooento/Martin/archaeognatha.html   (57 words)

  
 ENY3004 General Entomology - Order Archaeognatha   (Site not responding. Last check: 2007-11-01)
In Borrer et al., referred to as Microcoryphia.
Archaeognatha: primitive Order whose members were assigned to the Thysanura.
Scientific name (archaeo = old; gnatha = jaw) refers to primitive condition of mandible articulation.
www.famu.org /academics/hubbard/eny3004/ord_archaeognatha.asp   (189 words)

  
 Amazon.ca: A New Neomachilis Species from the Hawaiian Islands: Insecta : Archaeognatha : Machilidae: Books   (Site not responding. Last check: 2007-11-01)
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Top of Page : A New Neomachilis Species from the Hawaiian Islands: Insecta : Archaeognatha : Machilidae
www.amazon.ca /exec/obidos/ASIN/9996096432   (161 words)

  
 IngentaConnect The mitochondrial genome of the bristletail Petrobius brevistylis...   (Site not responding. Last check: 2007-11-01)
The mitochondrial genome of the bristletail Petrobius brevistylis (Archaeognatha: Machilidae)
Genome features like nucleotide composition and codon usage are compared with that of other insect taxa.
A + T content is similar in species of Archaeognatha and Zygentoma, but obviously lower than in Collembola and Pterygota.
www.ingentaconnect.com /content/bsc/imb/2006/00000015/00000003/art00002   (190 words)

  
 SBMNH Entomology - Insects of the Coal Oil Point Reserve
The scientific name of the order means 'old mouth', referring to the relatively primitive mouthparts of these insects.
Archaeognatha is an extremely ancient order, and are considered living fossils.
We have identified a single species at Coal Oil Point.
www.sbnature.org /collections/invert/entom/COP/COPbristletails.php   (133 words)

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