Araneae

Atrax robustus Very Dangerous Bites repeatedly and envenomates enthusiastically. (Ａustralian Venomous Funnel-web Spiders aggressively stand their ground.)

Range of the two genera (Hadronyche and Atrax) of venomous Australian funnel-web spiders.

Very dangerous Spiders of the genus Phoneutria aggressively stand their ground and are extremely venomous, but often give dry bites. (Brazilian Wandering Spiders)

Latrodectus mactans Very dangerous Spiders of the genus Latrodectus typically avoid contact if at all possible. (There are many venomous "widow" spiders world-wide. Although venom quantities are lower than Atrax or phoneutria genera, due to their wide distribution they cause more deaths worldwide than any other spiders.)

Latrodectus species occur in almost all areas, worldwide, that are not terribly cold in the wintertime. Note that parts of Africa are an exception to this generality.

Loxoceles reclusa (Brown Recluse) Dangerous Spiders of the genus Loxoceles may end up in your bed or in undisturbed clothing. S. American species are the more dangerous. Necrotic venom can produce severe damage, but rarely causes death.

Tegenaria agrestis Dangerous. May end up in your bed or in undisturbed clothing. (Hobo spiders in the U.S. have been implicated in medically significant bites but the same species is not known to be a problem biter in Europe. They are not aggressive, and necrosis subsequent to bites may be caused by infections.)

Chiracanthium inclusum(?). Troublesome symptoms; not known to be fatal. (Yellow sac spider) Body length 8 mm.

Tarantulas of the genus Poecilotheria are reported to give bites that can sometimes produce spasms or "cramps" of great intensity and duration. The species pictured is regalis. The species that is reported to produce more serious symptoms is striata (Mysore Ornamental), but no picture is available.

Digitally enhanced image of a Sphodros rufipes that shows the nearly perfectly vertical orientation of the chelicerae, a prime characteristic of the Mygalomorphae.

Digitally modified photograph showing "chopsticks" orientation of the chelicerae of the Araneomorphae.

dew in the morning

Spider web early in the morning

Another spiral or "orb" web.

Spider in its web.

Funneled spider net

Possibly a "small Araneus" species that builds its web in tree crowns. It is about 4 mm. long. This spider was collected in central North Carolina, USA.

Unknown spider found on rocks in streams of the Western Ghats One of the Pisauridae, possibly Dolomedes sulfureus (found in Japan) or Dolomedes fimbriatus (found in Europe)

From India Appears to be a Gnaphosid.

From India, probably a male Neoscona crucifera

From India

Nephila from the Western Ghats (ventral view)

From Pennsylvania, United States in a pond. Redish spider has white bars and dots.

Appears to be one of the jumping spiders

Brazil / São Paulo

Brazil / São Paulo

India

India

India

Ireland (Araneus diadematus)

species of crabspider shot in Madagaskar

species unknown

species unknown

orb

spiral, dew covered

Spiral, distorted where prey struggled

water droplets at nodes

spider vs. wasp

spider vs. wasp

Cyclosa sp. web

Spider silk anchored to one blade of grass.

Unknown Araneae

orb weaver

orb weaver

Orb weaver

Orb weaver

Orb weaver

Australia

Orb weaver, black background

Orb weaver, white background

Orb weaver, white background

Orb weaver, in front of moon

Orb weaver in web, black background

Orb weaver, black background

Orb weaver, black background

Orb weaver, black background

Orb weaver,

Orb weaver,

Orb weaver,

Orb weaver,

Orb weaver,

Orb weaver,

probably Tegenaria, central europe

Water spider, araña de agua

Spider eating a bee

unidentified

tangle

trap door spider

Sere scene

tangled form, depending from ceiling

color is not natural

same as above, but natural color. Hobo spider?

Unidentified

Water drops on spider web

from Norway

spider vs. dragonfly

Spain

from Spain

from Spain

Japan

Spider moulting (modified by Romarin)

Dew drops on web

Unknown spider eating fly

Leaf suspended in spider web

Dew-laden spider web in foggy pasture

Red

unknown

Long Island or the Thousand Islands

Long Island or the Thousand Islands

Long Island or the Thousand Islands

Long Island or the Thousand Islands

Long Island or the Thousand Islands

Long Island or the Thousand Islands

Long Island or the Thousand Islands

Long Island or the Thousand Islands

Long Island or the Thousand Islands

Long Island or the Thousand Islands

Long Island or the Thousand Islands

Long Island or the Thousand Islands

60x microphotograph of the 2mm long fang of an immature Psalmopoeus cambridgei spider that was itself 25mm long. Base of the chelicera is not shown.

10x microphotograph of the 2mm long fang of an immature Psalmopoeus cambridgei spider 25mm long and the tip of the smallest sewing needle available in ordinary commerce.

10x microphotograph of the 2mm long fang of an immature Psalmopoeus cambridgei spider 25mm long and the tip of the smallest hypodermic needle for animal husbandry use.

Spider showing epigyne

Hogna species wolf spider eye pattern.

Eye pattern of the orb weaving spiders.

Eye pattern of Chiracanthium (yellow sac spider) genus.

Eye pattern of the Tetragnathidae.

Cephalothorax of a typical wolf spider.

Body parts of the spider.

Eye pattern of the wolf spiders. 1. Egg sac, 2. Chelicerae, 3. Pedipalps

"Squared-off" cephalothorax of the jumping spiders.

Eye pattern of the jumping spiders.

Ventral diagram of the typical spider.

Digitally modified photograph showing "chopsticks" orientation of the chelicerae of the Araneomorphae.

Digitally enhanced image of a Sphodros rufipes that shows the nearly perfectly vertical orientation of the chelicerae typical of the Mygalomorphae.

The fang portion folds back into the chelicera as the blade of a pocket knife folds back into its handle.

Cut-away drawing of the cephalothorax and chelicerae, with venom glands and surrounding muscles.

Drawing showing how the "fang" portion of the chelicera articulates with the main part of the chelicera, and how the latter articulates with the cephalothorax.