41. Arachnids : Dennis Kunkel Microscopy, Inc. - Scientific Stock Photography Electron microscopy Arachnid images ectoparasites, dust mites, ticks, spiders, spider silk, scorpion, soil mites, bee mite. Dennis Kunkel Microscopy http://denniskunkel.com/DK/Arachnids/

Science Stock Photography Scientific stock photography library of light microscope pictures and electron microscopy images featuring science and biomedical microscopy photos Home Advanced Search Products Assignment Photography ... Contact Us Quick Search: Quick Category Browse: Home Page Algae Arachnids Bacteria Crystals Fungi Insects Medical Misc. Invertebrates Misc. Vertebrates Miscellaneous Plants Protozoa Viruses Category: Arachnids Arachnids have eight legs and mouthparts called chelicerae . Many groups are blood sucking ectoparasite ) and spread disease ( disease vector bacterial pathogen Spiders spiny-backed spider ... brown recluse Loxosceles reclusa Mites dust mite Dermatophagoides bat mite , Eriophyid leaf gall mite Aceria hibisci soil mite (Family Oribatidae), tortoise mite Uropodina bird mite feather mite ... Larca These light microscope and electron microscopy images (science images, microscopic pictures, microscope photos) consist of biology and biomedical microscopy photos. American dog tick ( Dermacentor variabilis American dog tick ( Dermacentor variabilis ... Contact Us Dennis Kunkel Microscopy, Inc. is a scientific stock photography agency (science stock photography, science stock photographs / pictures) featuring biology, medical and biomedical microscopy photos / pictures taken with light microscopes (LM) and electron microscopes (transmission electron microscope - TEM; scanning electron microscope - SEM). Microscopy photographs (science images, electron microscope images, photomicrographs, microscopy photos, microscope photos, microscopic pictures) are available for use in editorial and commercial formats. Image categories include Algae, Arachnids, Bacteria, Crystals, Fungi, Insects, Invertebrates, Medical, Miscellaneous, Plants, Protozoa, Vertebrates and Viruses.

42. Invertebrate Zoology - Arachnids - Spiders, Mites And Harvestmen These animals belong to the phylum Arthropoda (which includes crustaceans, insects and spiders). Spiders and their relatives belong to a class called http://www.amonline.net.au/invertebrates/ara/index.htm

These animals belong to the phylum Arthropoda (which includes crustaceans, insects and spiders). Spiders and their relatives belong to a class called Arachnida which includes spiders, ticks, mites, scorpions and harvestmen. The study of these animals is called arachnology. Characteristics of arachnids Eight walking legs Two body parts (cephalothorax (fused head and thorax) and abdomen) Biting or piercing jaws (chelicerae) Simple eyes No antenna Research Research programs are concerned with the systematics, phylogeny and zoogeography of spiders (Araneae), harvestmen (Opiliones) mites (Acarina), particularly in relation to Australian fauna. In addition, spiders and other arachnids are an important component of biodiversity and evolutionary studies undertaken in conjunction with the Centre for Biodiversity and Conservation Research and the Centre for Evolutionary Research. Projects Systematics of amaurobioid spiders Systematics of filistatid spiders Forest biodiversity studies Funnel-web spiders Systematics of Australian oribatid mites (Acarina: Oribatida) Systematics of harvestmen (Opiliones) Supervising post-graduate research Collections The arachnology collection is representative of most arachnid groups, and also includes collections millipedes, centipedes other minor arthropod groups. The spiders and harvestmen collections are the strongest areas with material from many parts of Australia including much Tasmanian a large

43. Scientists Believe Ancient Arachnids May Have Spun Silk Like Modern Spiders The 300million-year-old penny-sized creature, called Aphantomartus pustulatus, is a trigonotarbid part of an ancient group of arachnids that were among http://researchnews.osu.edu/archive/silkspin.htm

OSU News Research Archive Search an archive of past research stories. Coverage of OSU Research Reports on national news coverage of university research. Reporting on Cancer A reporter's guide to the disease. Science Communications Staff Who we are and what we do. (Last updated 11/3/03) Editor's note: During the Geological Society of America meeting, Easterday can be reached at the above number; Labandeira can be reached at the Vance Hotel at (206) 956-8500. Previous stories pertaining to Easterday's research: "Largest Fossil Cockroach Found; Site Preserves Incredible Detail," Images to accompany the story are available from Pam Frost Gorder or at this webpage Abstract of Easterday's presentation available here [Embargoed for release until 2:00 PM EST, Wednesday, November 5, 2003, to coincide with presentation at the Geological Society of America meeting in Seattle.] SCIENTISTS BELIEVE ANCIENT ARACHNIDS MAY HAVE SPUN SILK LIKE MODERN SPIDERS COLUMBUS, Ohio Geologists at Ohio State University have found evidence of silk spinning structures on the fossilized body of a long-extinct relative of modern spiders, one that lived 55 million years before the first dinosaurs.

44. Howstuffworks "Insects And Arachnids Channel" Insects and arachnids contains information on animals such as spiders and cockroaches. Learn about insects and arachnids on our Insects and arachnids http://science.howstuffworks.com/insects-arachnids-channel.htm

HowStuffWorks.com RSS Make HowStuffWorks your homepage Get Newsletter Search HowStuffWorks and the web: Science Life Science Animals Insects and arachnids are two closely related life forms. Learn about fantastic, weird and common insects and spiders, from cicadas and chiggers to termites and ticks. Related Categories: REFERENCE LINKS How Termites Work Termites have existed for 50 million years and can be found throughout the world. Learn about termites and find out how termite colonies are structured. How Bees Work Bees exhibit many traits found in stories and myths traits that have led many cultures to view them with reverence or awe. Explore how bees make honey and examine the potential causes and effects of Colony Collapse Disorder. How Chiggers Work Chiggers are tiny bugs that are known for delivering bites that itch intensely. Find out how chiggers work and learn about the chigger reproduction cycle. How Cicadas Work If you're tired of the peace and quiet, take heart: The latest swarm of cicadas is set to emerge in the U.S. this spring. These insects produce a "song" that can reach 120 decibels very close to a level that can damage human ear drums. Learn about the 17-year cicadas. How Cockroaches Work Entomologists estimate that there are between 5 and 10 million species of insects on Earth. But if asked which insect they hate the most, many people would have no trouble choosing just one - the cockroach. Learn about the seemingly endless reasons to detest the roach.

45. Arachnids - Physical Characteristics, Scorpions, Spiders, Mites And Ticks arachnids (pronounced uhRACK-nidz; class Arachnida) form the second-largest group of land arthropods (phylum Arthropoda) after the class Insecta. http://www.scienceclarified.com/Al-As/Arachnids.html

// nothing @import "../css/default.css"; Science of Everyday Things Science in Dispute Science and Technology Arachnids forum ... Al-As Arachnids Arachnids (pronounced uh-RACK-nidz; class Arachnida) form the second-largest group of land arthropods (phylum Arthropoda) after the class Insecta. There are over 70,000 species of arachnids that include such familiar creatures as scorpions, spiders, harvestmen or daddy longlegs, and ticks and mites, as well as the less common whip scorpions, pseudoscorpions, and sun spiders. The marine horseshoe crabs and sea spiders are near relatives. Physical characteristics Arachnids have paired, jointed appendages (parts that are attached to the main body), a hardened exoskeleton ( exo Most arachnids live on land and breathe by means of book lungs (socalled because their thin membranes are arranged like the pages of a book) or by tracheae (small tubes that distribute air from the outside throughout the body), or both. Most are flesh-eating predators. They feed by piercing the body of their prey and directly consuming its body fluids or by releasing digestive secretions that predigest the food before they eat it. Scorpions Spiders In spiders, the abdomen is separated from the joined head and thorax by a narrow waist. The large and powerful first appendages of some spiders contain poison glands at their base, while the tips serve as fangs that inject the poison into prey. The second appendages of spiders are long and leglike. In male spiders, these appendages each contain an organ used to transfer sperm to the female. Some species of spiders have only book lungs for breathing, while others have both book lungs and tracheae.

46. Potentially Dangerous Arachnids And Insects - BugGuide.Net This article covers all of the potentially “dangerous” arachnids (spiders and their kin) and insects found in the United States. http://bugguide.net/node/view/28627

@import url(misc/drupal.css); @import "themes/bugguide/bugguide.css"; Register Log In Home Guide ... Help Clickable Guide Calendar BugGuide Gathering NE Minnesota July 20-22, 2007 Photos from the gathering Home Forums Articles Potentially Dangerous Arachnids and Insects Introduction Note: This article deals only with the poisonous and venomous arthropods, not the ones that spread disease. The purpose of this article is to assist you in determining whether the “bug” or spider you have found is potentially dangerous. This article covers all of the potentially “dangerous” arachnids (spiders and their kin) and insects found in the United States. Many people think that “bugs” are out to get them, which is completely untrue. Almost all “bugs” are harmless and are actually beneficial and only a few species are potentially harmful. One thing to remember about “bugs” is you don’t bother them and they won’t bother you; however, if you need to remove an unwanted insect or spider, place a clear cup over it and slowly slide an index card underneath the cup. Do not try to pick up the insect or spider, rather learn and observe without touching.

47. USGS: Science Topics: Arachnids Provides links to USGS information about arachnids and related topics. Provides a topical browse interface into USGS information utilizing controlled http://www.usgs.gov/science/science.php?term=55&type=theme

48. Howstuffworks "Arachnids - Encyclopedia Entries" Learn about arachnids and get information on topics related to arachnids. http://reference.howstuffworks.com/animals-arachnids-encyclopedia-channel.htm

HowStuffWorks.com RSS Make HowStuffWorks your homepage Get Newsletter Search HowStuffWorks and the web: Encyclopedia Life Science Animals Arachnids Learn about Arachnids and get information on topics related to Arachnids. Related Categories: REFERENCE LINKS Featured Arachnids Entry Tarantula Tarantula, tuh RAN chuh luh, is a common name for a variety of mostly large spiders. Tarantulas inhabit warm climates around the world, especially tropical regions. Some types live for more than 20 years. Tarantulas get their name from a distantly related wolf spider that lives around Taranto in Italy. People once believed this spider's bite caused a disease called tarantism. The victims supposedly leaped in the air and ran about making strange noises. According to superstition, the best cure... THE ARACHNIDS LIBRARY Arachnid Arachnid, uh RAK nihd, is the name of any member of a class of small, insectlike animals. The... More >> Birdcatching spider Birdcatching spider is a large spider of Indonesia and New Guinea. The females are much larger... More >> Black widow Black widow is any of several dangerous spiders. The poisonous bites of black widows can cause...

49. Volume 36: Insects And Arachnids - Stock Footage Clips. Buy Royalty Free Stock V Volume 36 Insects and arachnids by Time Image. Fotosearch Stock Photography and Stock Footage helps you find the perfect photo or footage, fast! http://www.fotosearch.com/time-image/volume-36-insects-and-arachnids/TME736/

var inlightbox = "Image in Lightbox"; Stock Photography and Stock Footage The World's Stock Photography - One Web Site ™ [24 hrs. M-F] (SKU: TME736) Volume 36: Insects and Arachnids by Time Image Available stock footage formats: NTSC, PAL 21 clips, NTSC 720x486 30fps, PAL 720x576 25 fps Volume 36: Insects and Arachnids - stock footage clips. Buy royalty free stock video and motion on disc. Look for other discs in: Animals Nature Stock Footage Video Also available in bundle(s): Time Images Bundle Volumes 1-40: 14 DVD-Rom Set USD $1199.00 NTSC Ship and Download USD $295.00 NTSC Download Only USD $295.00 PAL Ship and Download USD $295.00 PAL Download Only USD $295.00 21 Images Page of 1 Images per page insect, insects, bee, bees, bumble bee, flower, nature Time Image Footage Add to Lightbox RF Royalty Free insect, insects, bee, bees, bumble bee, flower, nature Time Image Footage Add to Lightbox RF Royalty Free insect, insects, grasshopper, pest, agriculture pest, nature Time Image Footage Add to Lightbox RF Royalty Free insect, insects, grasshopper, pest, agriculture pest, nature Time Image Footage Add to Lightbox RF Royalty Free insect, predator, insects, mantis, praying mantis, nature, bugs

50. A Rarity Among Arachnids, Whip Spiders Have A Sociable Family Life PhysOrg news A rarity among arachnids, whip spiders have a sociable family life. http://www.physorg.com/news92921107.html

PhysOrg Account: Sign In Sign Up Home Nanotechnology ... All subcategories Published: 12:25 EST, March 12, 2007 Toolbox Rating: n/a Bookmark Save as PDF Print Email Blog It Digg It del.icio.us Slashdot It! Stumble It! A rarity among arachnids, whip spiders have a sociable family life A mother amblypygid with several of her 7-month-old offspring. Their whips are touching one another. Credit: Linda Rayor/Cornell Whip spiders, considered by many to be creepy-crawly, are giving new meaning to the term touchy-feely. In two species of whip spiders, or amblypygids, mothers caress their young with long feelers, siblings stick together until they reach sexual maturity, and all mix in social groups. This is surprising behavior for these arachnids long-thought to be purely aggressive and anti-social, according to a Cornell researcher. Social behavior is extremely rare in arachnids, a class that includes spiders, amblypygids, scorpions and mites, among others; only 76 (or less than 0.1 percent) out of the 93,000 known arachnid species have been observed living in social groups. The research, appearing in recent issues of both the Journal of Arachnology and Natural History magazine, marks the first time social behavior has been reported in amblypygids. "This was the best example I had ever seen of friendly behavior in an arachnid," said Linda Rayor, senior research associate in entomology and the lead author of both articles. Rayor describes in the articles how mothers habitually stroke their offspring with their long, thin whiplike front legs and how the siblings congregate in social groups.

51. Arachnids | QUEST Community Science Blog - KQED Tags arachnids, beetles, birds, bugs, calacademy, california, coelacanth, galapagos, insects, KQED, kqedquest, museum, QUEST, san francisco, Science http://www.kqed.org/quest/blog/tag/arachnids/

TV RADIO PODCASTS NEWS ... about Email: or QUEST Community Science Blog Home The Great Migration: Cal Academy moves 20 million specimens across town January 9th, 2008 by Cat Aboudara At 5pm on Sunday January 6, 2008, California Academy of Sciences closed its temporary location in order to start the move back to Golden Gate Park. On September 27, 2008 the Academy will open to the public once again in its new home in the Park. Many curious museum-goers have asked, why the long gap between closing and opening? 265 days is long time to move across town. The Botany collection was the first to move out of Howard Street. It took only eleven and a half days to move two million specimens. For perspective, it took 61,300 cardboard inserts bundled with over 40 miles of twine to bundle the flora. Botany is only one of eight Academy research departments preparing to move. Monarch, the last Grizzly bear of California Australian Lungfish Cultural keepsakes will be preserved. Pre-Columbian Inca clothing, 12th Century Persian ceramics, fragile feather leis, full-sized Native Alaskan kayaks, 500 Japanese folk toys, and a renowned collection of eating utensils will also find their home in Golden Gate Park. To give you a sense of the immensity of the project, 20 million specimens include the following:

52. Discovery Education Jeff Corwin Experience: Insects And Arachnids - How Do Spide How do spiders and other arachnids differ from insects? Travel around the world with Jeff to learn the answer. You ll visit Spain for a look at the dung http://www.swexpress.com/home.nsf/0/70427C46EEA01FF88525706800477116!opendocumen

Home Non-Profit View Cart Corporate ... Search FREE SHIPPING on web orders. FREE for web orders over $99 for UPS ground delivery in the 48 US continental states only, excluding Alaska and Hawaii. If you have sales questions, would like a quote or place an order, you can contact your dedicated Sales Team at (800) 527-7638. Jeff Corwin Experience: Insects and Arachnids by Discovery Education Publisher: Discovery Education View All Discovery Education Products Title: Jeff Corwin Experience: Insects and Arachnids Category: Science - Animals Platform: How do I estimate shipping? Media: VIDEO; DVD Grade Level: Action Part# Title Edition Price Jeff Corwin Experience: Insects and Arachnids Academic - VHS Jeff Corwin Experience: Insects and Arachnids Please Note: In our attempt to keep our pricing current and accurate, pricing is subject to change without notice. How do spiders and other arachnids differ from insects? Travel around the world with Jeff to learn the answer. You'll visit Spain for a look at the dung beetle, Morocco to view scorpions, and Africa to observe termites. Please Note: Technical support for this product is provided by the manufacturer.

53. Arachnids Poster At Art.com arachnids Poster Find the arachnids Wall Poster or another poster, print, photograph, photo or artwork in Art.com s Galleries. http://www.art.com/asp/sp-asp/_/pd--10018889/Arachnids.htm

Cart My Account My Gallery Track Order Search over 500,000 prints: advanced search Subjects Artists Collections Best Sellers var SaveCartOnExistSessionID='D4444C12F568469C930DC8A45CAFAC1E'; home subjects animals arachnids ... zoom Arachnids Wall Poster item #: 10018889A 27" x 38" Our Price: Usually ships same day more customizing options more customizing options similar products email to friend add to gallery add to wishlist Poster Only Wood Mounted Poster Laminated Poster Custom Frame It Ship Time Ship time indicates the typical time it takes for your item(s) to leave our facilities. This includes any framing or customizing services ordered as well as careful packaging to prevent damage in transit. Items that ship same day normally leave our facilities on the same business day if your order is placed before 5:00pm EST.

54. A Rarity Among Arachnids, Whip Spiders Have A Sociable Family Life ( Whip Spider Whip spiders considered by many to be creepycrawly are giving new m In two species of whip spiders or amblypygids mothers caress their y. http://www.bio-medicine.org/biology-news/A-rarity-among-arachnids--whip-spiders-

@import "http://css.bio-medicine.org/images/csdg.css"; var vvtit='A%20rarity%20among%20arachnids%2C%20whip%20spiders%20have%20a%20sociable%20family%20life'; ( Whip spiders considered by many to be ...)A rarity among arachnids, whip spiders have a sociable family life Home Biology Medicine Technology ... RSS Navigation Links Biology News Medicine News Biology Products Medicine Products ... NEWS A rarity among arachnids, whip spiders have a sociable family life hcocgle("Outline") Whip spiders considered by many to be creepy-crawly are giving new m...In two species of whip spiders or amblypygids mothers caress their y...Social behavior is extremely rare in arachnids a class that includes ... This was the best example I had ever seen of friendly behavior in an ... I was amazed at how incredibly interactive the groups are said Rayo... hrss("RSS") http://www.bio-medicine.org/inc/biomed/biology-news.asp http://feeds.bio-medicine.org/latest-biology-news document.write("Email Subscription: Get Latest Biology News delivered by email"); hcocgle("Outline") hrss("RSS") Whip spiders, considered by many to be creepy-crawly, are giving new meaning to the term touchy-feely.

55. Arachnids « Microecos And everyone knows arachnids are the best. Next year I’m going to the foothills or lava beds or Arizona or somewhere with some guaranteed scorpions! http://microecos.wordpress.com/category/arachnids/

microecos minor musings on the macrocosm Archive for the 'arachnids' Category Reminder 9 October 2007 Photo: Jessica Oster. G neil.kelleyca a gmail.com Also you might want to get a jump start on birthday shopping: here. lol. Posted in arachnids arthropods life Flipping Out 4 September 2007 L International Rock Flipping Day My discoveries were rather pedestrian, no salamanders, no snakes, no scorpions, not even a pseudoscorpion. But, I got a few nice shots nevertheless. At right, rock #2, as extraordinarily observant readers may have noticed is a continuation of the seashell theme, though in this case one with a considerably more established pedigree. It is a roughly grapefruit-sized fossil oyster, probably Ostrea titan one of the ubiquitous (and consequently very dull) fossils of my childhood. Pseudacris regilla Many other IRF day participants turned up amphibians ( check out the flickr pool ). Most amphibians began their life as aquatic larva and, because most need to keep their skins moist in order to survive, the damp undersides of rocks are appealing refugia especially in the heat of a summer day. Here are some other folks with aquatic roots. At center is a slug, perhaps the Gray Garden Slug (

56. Medical Insects And Arachnids - Animal Systematics / Taxonomy / Biogeography Jou Medical Insects and arachnids Zoology. This identification guide is an in-depth, consistent and accessible approach providing information on both the http://www.springer.com/prod/b/0-412-40000-6?referer=www.wkap.nl

57. Category:Arachnids - Simple English Wikipedia, The Free Encyclopedia More information about this category can be found at Arachnid. Retrieved from http//simple.wikipedia.org/wiki/Categoryarachnids http://simple.wikipedia.org/wiki/Category:Arachnids

var categoryTreeCollapseMsg = "collapse"; var categoryTreeExpandMsg = "expand"; var categoryTreeLoadMsg = "load"; var categoryTreeLoadingMsg = "loading"; var categoryTreeNothingFoundMsg = "nothing found"; var categoryTreeNoSubcategoriesMsg = "no subcategories"; var categoryTreeNoPagesMsg = "no pages or subcategories"; var categoryTreeErrorMsg = "Problem loading data."; var categoryTreeRetryMsg = "Please wait a moment and try again."; Category:Arachnids From Simple English Wikipedia - the free encyclopedia that anyone can change Jump to: navigation search More information about this category can be found at Arachnid Subcategories There is one subcategory to this category. S Spiders Pages in category "Arachnids" There are 5 pages in this category. Arachnid O Opiliones S Scorpion Spider Spider web Retrieved from " http://simple.wikipedia.org/wiki/Category:Arachnids Category Arthropods Views Category Talk Change this page History Personal tools Log in / create account Getting around Main Page Community portal Simple talk New changes ... Give to Wikipedia Search Toolbox What links here Related changes Upload file Special pages ... Permanent link In other languages Catal  Česky Dansk Deutsch ... T¼rk§e This page was last modified 11:29, 17 December 2007.

58. Arachnids arachnids (class Arachnida) form the second largest group of terrestrial arthropods (phylum Arthropoda) with the class Insecta being the most numerous. http://science.jrank.org/pages/470/Arachnids.html

Other Free Encyclopedias Science Encyclopedia Science Encyclopedia Vol 1 Arachnids Arachnids (class Arachnida) form the second largest group of terrestrial arthropods (phylum Arthropoda) with the class Insecta being the most numerous. There are over 70,000 species of arachnids, which include such familiar creatures as scorpions, spiders, harvestmen or daddy longlegs, and ticks and mites , as well as the less common whip scorpions, pseudoscorpions, and sun spiders. Arachnids are members of the subphylum Chelicerata, which also includes the phylogenetically ancient horseshoe crabs Like other arthropods, arachnids have paired, jointed appendages, a hardened exoskeleton, a segmented body, and a well-developed head. They differ from other arthropods by the organization of their body into two main parts, the prosoma (equivalent to the head and thorax of insects ) and the opisthosoma (or the abdomen). There are six pairs of appendages associated with the prosoma. The first pair are stabbing appendages near the mouth called chelicerae, used for grasping and cutting, and the second pair are called pedipalps or general purpose mouthparts. The last four pairs of appendages are the walking legs. Most arachnids are terrestrial and respire by means of book lungs, or by tracheae (air tubes from the outside to the tissues), or both. Most arachnids are terrestrial carnivorous predators. They feed by piercing the body of their prey , and then either directly ingesting its body fluids, or by releasing digestive secretions onto the outside of the prey to predigest the food before ingestion.

59. Whip Spiders Exhibit Surprising Behavior A rarity among arachnids, predatory whip spiders have a sociable family life, This is surprising behavior for these arachnids, longthought to be purely http://www.news.cornell.edu/stories/March07/amblypygids.kr.html

Search Cornell Search Chronicle Online March 12, 2007 A rarity among arachnids, predatory whip spiders have a sociable family life, CU researcher finds By Krishna Ramanujan Whip spiders, considered by many to be creepy-crawly, are giving new meaning to the term touchy-feely. In two species of whip spiders, or amblypygids, mothers caress their young with long feelers and siblings stick together in social groups until they reach sexual maturity. This is surprising behavior for these arachnids, long-thought to be purely aggressive and anti-social, according to a Cornell researcher. Provided A mother amblypygid with several of her 7-month-old offspring. Their whips are touching one another. Social behavior is extremely rare in arachnids, a class that includes spiders, amblypygids, scorpions and mites, among others; only 76 (or less than 0.1 percent) out of the 93,000 known arachnid species have been observed living in social groups. The research, appearing in recent issues of both the Journal of Arachnology and Natural History magazine, marks the first time social behavior has been reported in amblypygids. "This was the best example I had ever seen of friendly behavior in an arachnid," said Linda Rayor, senior research associate in entomology and the lead author of both articles. Rayor describes in the articles how mothers habitually stroke their offspring with their long, thin whiplike front legs and how the siblings congregate in social groups.

60. EVIDENCE FOR SILK-SPINNING IN TRIGONOTARBID ARACHNIDS (CHELICERATA: TETRAPULMONA EVIDENCE FOR SILKSPINNING IN TRIGONOTARBID arachnids (CHELICERATA TETRAPULMONATA) AND OTHER NEW DISCOVERIES FROM CEMETERY HILL (CARBONIFEROUS http://gsa.confex.com/gsa/2003AM/finalprogram/abstract_66896.htm

2003 Seattle Annual Meeting (November 2–5, 2003) Paper No. 213-10 Presentation Time: 11:00 AM-11:15 AM EVIDENCE FOR SILK-SPINNING IN TRIGONOTARBID ARACHNIDS (CHELICERATA: TETRAPULMONATA) AND OTHER NEW DISCOVERIES FROM CEMETERY HILL (CARBONIFEROUS: DESMOINESIAN-MISSOURIAN), COLUMBIANA COUNTY, EASTERN OHIO EASTERDAY, Cary R. , Geological Sciences, The Ohio State Univ, P.O. Box 30651, Seattle, WA 98113, xenoblatta@hotmail.com. New structures (‘microtubercle rows’) are reported on the patella and tibia of the fourth walking legs of the trigonotarbid Aphantomartus pustulatus . These ‘rows’ are similar in shape and location to the calamistrum (used to comb out fine catching threads) in cribellate spiders. Silk-producing structures are unknown in trigonotarbids. Alternatively, these ‘microtubercle rows’ may represent cleaning structures or possibly trichobothria, filiform hairs of extreme sensitivity used to trigger ‘fight or flight’ responses in spiders. Numbers of trichobothria are known to correspond to spider ecology—with 20 to 1000 per leg of ground spiders and about 10 per leg of web spiders. Thirty-seven microtubercles are reported on the ‘row’ of the left patella on the Cemetery Hill Aphantomartus , which is consistent with ground spiders and the interpretation that Aphantomartus was a ‘sit-and-wait’ predator.

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