Maxillipeds


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Related to Maxillipeds: uropods, Swimmerets, Pleopods

Maxillipeds

 

appendages of the first three front thoracic segments in crustaceans. They are used for catching and breaking up food and for feeling and tasting; they are frequently also used for breathing and for ventilating the branchial cavities. In structure the maxillipeds resemble the lower jaws (maxillae) and the walking legs. In chilopods the clawlike legs of the first segment of the body are called maxillipeds.

References in periodicals archive ?
The long dactylus of the third maxilliped that overreaches the tip of the propodus and the subtriangular telson wider than the sixth abdominal somite are unique features that clearly support that P.
3 = fast, active movement of legs, righting time of 5-40 s in water bath or on the sorting table, fast movement of maxillipeds, chelae grab any object strongly and for long periods ([greater than or equal to] 2 min), threat display.
Maxilla and first maxilliped with dense covering of setae-like structure formed by bacterial colony on ventral surfaces of scaphognathite and caridean lobe, respectively (Fig.
These larvae appeared to have been hatched prematurely, and their morphology differed from that expected for a first-stage zoea form in that maxillipeds were devoid of natatory setae (see Morphology section above).
The phyllosomas then hauled up the tentacles of the jellyfish using the first, second, and third pereiopods, through the second maxillipeds and the mouth-part, to finally feed on it.
Mouth closure If closed, attempt to 3rd maxillipeds retract open (extend) the 3rd strongly to cover the maxillipeds with a sharp smaller mouth parts.
For example, studies have revealed that posterior shifts in the expression boundary of the Hox gene Ultrabithorax (Uhx) led to the evolution of maxillipeds, which have morphologically and functionally specialized anterior thoracic appendages for feeding (Averof and Patel, 1997; Abzhanov and Kaufman, 1999, 2000).
The family Sicyoniidae is morphologically peculiar in having the following features: (1) prosartema absent, (2) exopods absent from second and third maxillipeds, (3) pleopods with one ramus only, and (4) pleurobranchiae absent from fourth to sixth thoracic somites.
2, E and F): Elongate with distinct waist; anteroventral median ocellus; carapace developed; rudimentary maxillae and maxillipeds bearing numerous short setae.