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Topic: Araneomorph

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	The Sixth International: 29 March 2004 - 4 April 2004 Archives
		That is, she is part of a discrete group considered more 'primitive' (closer to the ancestral state) than the araneomorphs, or 'true' spiders.
		Araneomorphs are labidognath - the chelicerae face each other and the fangs close in a pinching movement.
		Thery're very big, compared to those of most araneomorphs, but her venom glands are small, being contained within the chelicerae (in araneomorphs, they extend back into and occupy a good bit of the body).
	www.6thinternational.org /2004/week14 (1975 words)

	The Find-a-spider Guide - Spider Info
		Araneomorph spiders: The more advanced spider families, most of which can survive indefinitely in webs or other open environments without suffering desiccation.
		The advanced (araneomorph) spider families have one of these on each side of the abdomen close to its front end but primitive spiders (mygalomorphs) have a second pair behind the first.
		It is easily seen in fully mature araneomorphs but not in mygalomorphs or immature araneomorphs.
	www.usq.edu.au /spider/info/glossary.htm (854 words)

	Arachnoboards - Linothele sp. True spider or Tarantula?!?
		Here's a couple of basic differences to help: Araneomorphs possess a cribellum, which is a comb like appendage situated near the anus.
		The cribellum is what allows araneomorphs to spin several different types of silk.
		Araneomorph means literally "spider form" or "spider shape" as if Ts and their relatives don't look like spiders.
	www.arachnoboards.com /ab/printthread.php?t=14826 (752 words)

	Spiders - Silk - the spider's success story
		The original spiders, represented today by the primitive, segmented, mesothelid spiders, had eight pairs of silk spinning organs or spinnerets placed under the middle of the abdomen (Mesothelae).
		In mygalomorph and araneomorph spiders the spinnerets have moved to the end of the abdomen (Opisthothelae).
		In these spiders the anterior median spinnerets (AMS) are either no longer present or remain in some araneomorph spiders as a modified spinning structure called the cribellum.
	www.amonline.net.au /spiders/toolkit/silk (310 words)

	Spiders - Spider ages
		Most araneomorph spiders (orb weavers, huntsman, etc.) live from one to three years.
		Mygalomorph spiders (trapdoors, tarantulas) are generally much longer lived.
		Female spiders generally live longer than males, this difference being especially notable in long-lived spiders like mygalomorph spiders - e.g., male funnelwebs mature in two to three years and then die about nine months later; whereas females mature in three to four years but may live for many years (six or more) after that.
	www.austmus.gov.au /spiders/life/growth/ages.htm (127 words)

	LidRock - "How Spiders Work" (Site not responding. Last check: 2007-10-22)
		In the mygalomorph spider suborder, which includes the various tarantulas, the chelicerae are positioned so that the fangs swing forward into the prey, like an axe.
		For the mygalomorph system to work effectively, the prey has to be on ground or another solid surface -- the spider has to sandwich the prey between something else and the fangs.
		The araneomorph system works whether or not the prey is on solid ground -- the chelicerae simply push against each other.
	www.lidrock.com /spider6.htm (730 words)

	Upto11.net - Wikipedia Article for Spider (Site not responding. Last check: 2007-10-22)
		Primitive mygalomorph spiders generally have only a pair of book lungs filled with haemolymph, where openings on the ventral surface of the abdomen allows air to enter and diffuse oxygen.
		Modern araneomorph spiders often have a single book lung in addition to spiracles which deliver air into the tracheae, where oxygen is then diffused into the haemolymph.
		The Brazilian wandering spider (a ctenid spider) and the Sydney funnel-web spider (a mygalomorph not related to the araneomorph funnel-web spiders) frequently bite people and are regarded as among the most dangerous in the world.
	www.upto11.net /generic_wiki.php?q=spider (2997 words)

	The Natural History of Tarantula Spiders
		Like the mygalomorphs, araneomorphs (true spiders) are also included in the spider suborder Opisthothelae.
		They are however easily differentiated from the araneomorphs (true spiders) by the articulation of their chelicerae or jaws.
		In mygalomorphs the jaws are positioned in such a way that they strike downwards towards the ground whereas araneomorph jaws close together in a sideways pincer movement.
	www.thebts.co.uk /old_articles/natural.htm (4590 words)

	-= Mesozoic Arachnids: Dr Paul A. Selden =- (Site not responding. Last check: 2007-10-22)
		Selden, P. A., Anderson, H. M., Anderson, J. and Fraser, N. Fossil araneomorph spiders, from the Triassic of South Africa and Virginia.
		Fossil araneomorph spiders, from the Triassic of South Africa and Virginia
		Thus, they represent the oldest known fossil araneomorphs and extend the fossil record of the infraorder by approximately 40 Ma to 225 Ma.
	www.earth.man.ac.uk /research/projects/1/site/pas.html (1458 words)

	Carrai Cave Spider
		Genus name from Latin: pro - before; gradus - step; ungula - claw = "early or oldest claw stepper", a reference to the species ancient lineage and its enlarged front leg claws.
		This species is important as the first web builder to be discovered within a family of basal araneomorph hunting spiders ("basal" because they retain "primitive" features not present in more "advanced" families).
		This helped to establish the idea that all spiders have evolved from web building ancestors.
	pandora.nla.gov.au /pan/33537/20030212/www.amonline.net.au/factsheets/carrai_spider.htm (567 words)

	Queensland Museum - Curatorial Staff - Dr Robert Raven
		Raven was awarded a CSIRO Post-doctoral Fellow which he undertook at both the American Museum of Natural History, New York, and at CSIRO Division of Entomology, Canberra.
		Raven is a spider systemist specialising in trapdoor, funnelweb & tarantula spiders (Mygalomorphae), and ground hunting araneomorph spiders (excluding Lycosidae and Ganphosoidea).
		His research has been supported by an ARC grant in 1987 (which specifically resulted in the publication of over 15 papers) and has received ABRS funding since 1996.
	www.qmuseum.qld.gov.au /organisation/staff/detail.asp?staffName=Raven,Robert (233 words)

	ABC Online Forum (Site not responding. Last check: 2007-10-22)
		Their most distinctive feature is that they have four quite prominent eyes, arranged in a box-shape on the top of their head.
		You can pick them from the Mygalomorph spiders by the arrangememt of the fangs - Araneomorph spiders' fangs are slung underneath the head, and the fang bases aren't prominently visible when the spider is viewed from above.
		Mygalomorph spiders fang bases stick straight out in front of the head, and are very prominent when you look down on the spider.
	www2b.abc.net.au /science/scribblygum-old/posts/topic1201.shtm (796 words)

	Spiderwebs and Silk: Tracing Evolution from Molecules to Genes to Phenotypes
		Ancestral araneomorph spiders spin "dry" capture silks into irregular webs; derived araneomorph spiders (here, the Orbiculariae) spin dry and "wet" capture silks into symmetrical webs
		The amino acid compositions of silks spun by arthropods vary in proportions of alanine, glycine, and serine
		Comparison of MA silk produced by ancestral and derived species suggests a trend toward reduced silk costs among the cribellates and between the MA and Flag silks of the Araneoidea
	www.booksmatter.com /b0195129164.htm (1220 words)

	Re: Early in the morning, I have noticed a lot of small spider webs.
		Depending on your area these may be the sheet webs of spiders in the families Hahniidae or Agelenidae.
		The Agelenidae are araneomorph funnelweb spiders (not to be confused with the dangerous Sydney funnelweb tarantula), but the funnel part of their sheet webs may not be easily seen in young individuals.
		Both Hahniidae and Agelenidae commonly build their sheet webs in meadows or fields.
	www.madsci.org /posts/archives/2004-03/1079589537.Zo.r.html (162 words)

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