pereiopod การใช้

• The chelae ( claws ) on the first pereiopod.
• Mature females have a small claw on the fifth pereiopod, and enlarged pleopods.
• Each appendage from the second maxilla to the fifth pereiopod also bears a gill.
• The pereiopods bear the sexual organs, which are the third pereiopod in the female and the fifth pereiopod in the male.
• The pereiopods bear the sexual organs, which are the third pereiopod in the female and the fifth pereiopod in the male.
• The two species are found in different oceans, and can be distinguished by the pattern of setation on the claw of the first pereiopod.
• Like other ghost crabs, one of the claw appendages ( chelipeds, the first pereiopod pair ) of gulf ghost crabs is much bigger than the other.
• Like other ghost crabs, one of the claw appendages ( chelipeds, the first pereiopod pair ) of " Ocypode brevicornis " is much bigger than the other.
• The first pereiopod is modified into a strong cheliped ( claw-bearing leg ) : the claw's fingers, the dactylus and propodus, are black at the tips.
• ""'Alpheus tricolor " "'is a crustacean belonging to the mesial tooth; its third pereiopod has an armed ischium, with a simple and conical dactylus.
• ""'Alpheus fasqueli " "'is a crustacean belonging to the mesial tooth; its third pereiopod has an armed ischium, with a simple and conical dactylus.
• In lobsters which have had a pereiopod ( walking leg ) cut off or been injected with the irritant lipopolysaccharide, the endogenous morphine levels initially increased by 24 % for haemolymph and 48 % for the nerve cord.
• Fenner A . Chace considered it to be the sister group to the much larger superfamily Palaemonoidea, with which it shares the absence of endopods on the pereiopods, and the fact that the first pereiopod is thinner than the second.
• The chelipeds are usually robust, and in some the last pereiopod pair has ovate sternum between segments 4 to 8 are usually incomplete, and in the Portunidae, the eighth sternite is usually visible if seen from below and has a penial groove.
• However, " P . texana " only occurs in the Gulf of Mexico, and can be distinguished from " P . sayi " by the form of the fifth pereiopod ( last walking leg ) and that of the male gonopod.
• It differs from " Atya " by various characters, including the form of the telson ( which is longest at the corners in " Atyopsis ", but not in " Atya " ) and the presence of a " massive spur " on the male third pereiopod.