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The jumping spider Phidippus audax.The basal parts of the chelicerae are the two iridescent green mouthparts. The chelicerae (/ k ə ˈ l ɪ s ər iː /) are the mouthparts of the subphylum Chelicerata, an arthropod group that includes arachnids, horseshoe crabs, and sea spiders.
Pycnogonum litorale feeds exclusively on Cnidaria, with adults feeding on sea anemones, while juveniles feed on hydroids, such as Clava multicornis.The proboscis is inserted into the prey and some body fluid is sucked out; the sea spider can be considered a parasite rather than a predator, as the food source is not killed; sea anemones that are targeted include Actinia equina, Anemonia viridis ...
However, in sea spider and arachnids, the pedipalps are more or less specialized for sensory [12] or prey-catching function [10] – for example scorpions have pincers [20] and male spiders have bulbous tips that act as syringes to inject sperm into the females' reproductive openings when mating.
The specimen also had “large” ovigers, which are a male sea spider’s egg-carrying organ, according to the study. Sea spiders mate using “genital pores in their legs,” aquarium experts said.
Colossendeis megalonyx is a species of pycnogonids, also known as sea spiders, in the famly Colossendeidae. The species was first described by Dutch zoologist Dr. Paulus Peronius Cato Hoek after his voyage on the HMS Challenger from 1873-1876.
Although they are known to feed on sea anemones, most sea anemones survive this ordeal, making the sea spider a parasite rather than a predator of sea anemones. [24] A few species such as Nymphonella tapetis are specialised endoparasites of bivalve mollusks. [41] [42] Not much is known about the primary predators of sea spiders, if any.
The scarlet sea spider is 40-50mm across and has a bright red body with long legs. Both sexes have a pair of legs for holding the egg mass. [2] Ecology
Most colossendeids can grow to giant sizes as adults, far larger than any other sea spiders. The largest sea spider, Colossendeis colossea, can reach a leg span of 70 cm, [4] whereas the subfamily Hedgpethiinae includes tiny species with leg span of less than 1 cm. [5] Like most sea spiders, colossendeids usually have four pairs of legs, except for three species, Decolopoda australis, D ...