cephalothorax


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cephalothorax

(sĕf′ə-lə-thôr′ăks′)
n.
The anterior section of arachnids and many crustaceans, consisting of the fused head and thorax.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

cephalothorax

the fused head and thorax which occurs in many ARTHROPODS, particularly CRUSTACEANS.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005
References in periodicals archive ?
The shrimp fed the diets supplemented with 1.5% astaxanthin, accumulated a lower quantity of the pigment in the abdomen (R2 = -0.93) and the cephalothorax (R2 = -0.91) in compareson with the shrimp fed a higher concentration of [beta]carotene, which accumulated the highest concentration of carotenoid in the abdomen (R2 = 0.80) (Fig.
TABLA 3 Relaciones entre el peso (P) y longitud del cefalotorax (LC) o longitud total (LT) para diferentes especies de peneidos reportada en varios estudios TABLE 3 Relationships between weight (P) and length of cephalothorax (LC) or total length (LT) for different penaeid species reported in several studies Estudio Especie Localidad Fecha Actual F duorarum Laguna de May 2011 estudio Terminos -March 2012 May 2011 -March 2012 May 2011 -March 2012 Diaz et al., F.
cephalothorax width, and mass; and moderately correlated to white patch area.
(A) Copepodid I, dorsal view; (B) Cephalothorax of copepodid I.
The cephalothorax of each female was detached from the pleon, and both were weighed (wet weight, precision 0.1 mg) and stored at -70 [degrees]C for biochemical analyses.
Other ways in which arachnids differ from insects are that they have a fused head and thorax called a cephalothorax, whereas these body segments are separate in insects as they are in man; scorpions never possess wings or antennae and do not sport compound eyes.
Spiders have two main body parts: The cephalothorax and the abdomen, connected by a thin waist called the pedicel.
The cephalothorax constitutes half or more of the body length.
A number of evolutionary transformations are observed in major plates of the exoskeleton (progressive development of stenobasal branchial plates, elongation of median plates), which are connected with contraction in width of the cephalothorax (Obruchev & Mark-Kurik 1965, pp.
Cephalothorax. Eyes absent; four longitudinally divided anterior structures near the submarginal fold present; cephalic setae absent.