(n.) The anterior portion of any one of the Arachnida and higher Crustacea, consisting of the united head and thorax.
Example Sentences:
(1) The well-known defense response of a crab (laterus merus display, LMD) was easily evoked in Carcinus mediterraneus by striking the cephalothoraxic protogastric region between the eyestalks.
(2) The sensory modalities for the reflexes included (a) stretch of the dorsal pericardial wall, (b) chemical stimulation of coxal hair sensilla with glucose and (c) tactile stimulation of hair sensilla in and below the gill chamber, on the antennae, the antennules and on the anterior cephalothorax.
(3) Polyclonal antibodies against alpha-latrotoxin did not cross-react in the immunodiffusion test with S. paykulliana venom extracts, nor in the immunofluorescence assay with its cephalothorax sections, thus suggesting that the venom glands do not contain alpha-latrotoxin.
(4) The muscles of the cephalothorax and of the legs were found to be the most frequently and most heavily infected parts of the crab.
(5) Hook and frontal glands are relatively compact, and within each gland ductules serving individual secretory lobules collect into common ducts which discharge over each of the four hooks, or at the anterior margin of the cephalothorax respectively.
(6) Porocephalid pentastomids possess prominent paired frontal glands which discharge secretion through large ducts onto the cuticle in the region of the cephalothorax.
(7) Analysis of putative loss-of-function mutations affecting the head and thorax suggests that the maxillopedia and Cephalothorax genes most closely resemble proboscipedia and Sex combs reduced of Drosophila.
(8) A method is described for detecting polymorphisms of cephalothorax and tail homogenates of 25 puerulus staged Panulirus argus in phosphoglucomutase (PGM) and esterases.
(9) at the temperatures of 21-22 degrees C, on days 18-21 at 15 degrees C, on days 24-28 at 10 degrees C, and on days 59-65 at 6 degrees C. Most larvae, including infective cercoscoleces, were localized in the cephalothorax of the intermediate host, particularly in its first segment.
(10) This shrimp lacks an externally differentiated eye, having instead a pair of large organs within the cephalothorax immediately beneath the dorsal surface of the transparent carapace, connected by large nerve tracts to the supraesophageal ganglion.