Sea spiders have long legs in contrast to a small body size.

Slow moving sea spiders are common, sometimes growing as large as a human hand.

Associated with these were a large number of sea spiders in the class Pycnogonida.

Nymphonidae is a family of sea spiders native to the Atlantic.

Pycnogonum is a genus of sea spiders in the family Pycnogonidae.

Sea spiders are found in all oceans.

Sea spiders possess a tubular proboscis forward from the body trunk, at the end of which is the opening to the mouth.

Below him, Doug, using the new probe lens, would focus on capturing shots of giant sea spiders and isopods.

Sea spiders either walk along the bottom with their stilt-like legs or swim just above it using an umbrella pulsing motion.

Sea spiders are generally predators or scavengers.

He wrote his thesis on the phylogeny of sea spiders (pycnogonids) and wrote four books about evolution.

Diving below the ice, we discover prehistoric giants, including terrifying sea spiders and woodlice the size of dinner plates.

Predators include pycnogonid sea spiders, wrasses and sea turtles.

Sea spiders, also called Pantopoda or pycnogonids, are marine arthropods of class Pycnogonida.

The Sea spiders belong to the class Pycnogonida of the phylum Arthropoda.

Two of the largest chimneys were recovered while still hot and teeming with small worms, sea spiders and limpets.

Hedgpeth, meanwhile, had long before settled on pycnogonids, an order of rickety-legged marine organisms commonly known as sea spiders.

It does not have the chelicerae or pedipalps typical of sea spiders but uses its barrel-shaped proboscis for feeding.

There are also saltwater spiders and sea spiders who can survive in the sea because they can hunt.

There are no chelicerae or palps and these sea spiders use their proboscis to suck juices from their prey.

Sea spiders (Pycnogonida)

Animals that do predate opisthobranchs include other opisthobranchs and toxin-resistant predators like sea spiders.

Predators on the ringed anemone include starfish, nudibranchs and sea spiders such as (Pigrogromitus timsanus).

--- Part P refers to the extinct giant sea scorpions, the horseshoe crabs, and the sea spiders.

Hedgpeth, the world expert on sea spiders, once ran the Marine Science Center at Oregon State University.

The pycnogonids are thus neutral with regard to the great appendage theory.

Other pycnogonids were observed to carry tentacles away, presumably to be consumed elsewhere.

Most species of pycnogonids transport their offspring only during the egg stage; but this species carries its young too.

Male pycnogonids have a special pair of ovigerous legs; they can be seen here at the front, ending in pincers.

Achelia is a genus of pycnogonids the family Ammotheidae.

Reproduction involves external fertilisation after "a brief courtship", but very little is known about the secret lives of most pycnogonids.

He wrote his thesis on the phylogeny of sea spiders (pycnogonids) and wrote four books about evolution.

Pycnogonids are so small that each of their tiny muscles consists of only one single cell, surrounded by connective tissue.

Pycnogonids are well camouflaged beneath the rocks and among the algae that are found along shorelines.

Sea spiders, also called Pantopoda or pycnogonids, are marine arthropods of class Pycnogonida.

In total, pycnogonids have four to six pairs of legs for walking as well as other appendages which often resemble legs.

Various other features are found in the group, for instance, tardigrades, pycnogonids and roundworms have a triradiate pharynx.

Hedgpeth, meanwhile, had long before settled on pycnogonids, an order of rickety-legged marine organisms commonly known as sea spiders.

Heller primarily specialised in crustaceans but also worked on bryozoans, echinoderms, pycnogonids, and tunicates.

Other predators on marine bryozoans include fish, sea urchins, pycnogonids, crustaceans, mites and starfish.

They do, however, share one feature different from the paternally-caring fish, and perhaps different from pycnogonids: they nearly all have internal fertilization.

Fossils of pycnogonids ("sea-spiders"), the first find in Mesozoic strata in an admittedly very patchy fossil record, were identified in 2007.

Although the fossil record of pycnogonids is scant, it is clear that they once possessed a coelom, but it was later lost, and that the group is very old.

The surviving marine species include the four species of xiphosurans (horseshoe crabs), and possibly the 1,300 species of pycnogonids (sea spiders), if the latter are chelicerates.

These thick accumulations of mud provide substrate for a rich sea-bed fauna, predominantly of water-filterers (sponges, molluscs, salps) and scavengers (worms, arthropods, pycnogonids, fish).

The labrum is a flap-like structure that lies immediately in front of the mouth in almost all extant euarthropods, the general exception being provided by the probable chelicerate-relatives the pycnogonids.

Little is known about predation specifically on cyclostomes although it is likely that they are preyed upon by the nudibranchs (sea-slugs), pycnogonids (sea-spiders), echinoids and fishes which consume other marine bryozoans.

Pycnogonids are small spider-like creatures, inch to 6 inches long depending on the species, which are not uncommon on seashores all over the world, clinging to sea anemones or the bottom of rocks (Figure 8.9).

Maxmen and others recently published a morphologically based paper that claimed the enigmatic chelifores of extant pycnogonids are innervated from the protocerebrum, and not from the trito- or deutocerebrum as previously claimed.

This would suggest that pycnogonids had uniquely retained a "great appendage" homologue as an appendage, unlike all other euarthropods in which it had been transformed into the labrum (pycnogonids lack a labrum).