prosoma

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pro·so·ma

 (prō-sō′mə)
n.
The anterior of the two or three main divisions of the body of certain invertebrates, especially the cephalothorax of an arachnid.

[pro- + Greek sōma, body; see teuə- in Indo-European roots.]

pro·so′mal adj.

prosoma

(prəʊˈsəʊmə)
n, pl -mas or -mata (-mətə)
(Zoology) zoology the head and thorax of an arachnid

pro•so•ma

(proʊˈsoʊ mə)

n., pl. -mas, -ma•ta (-mə tə)
an anterior body region, esp. the arthropod cephalothorax.
[1870–75]
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References in periodicals archive ?
Males in any population average about 80% of the prosomal width of the females (Shuster, 1979) and mature females are significantly heavier than mature males because of their larger size and added weight associated with numerous eggs within their prosomas (Leschen et al.
At 0, 2, 4, 10, and 16 h after thermal incubation was terminated, the prosomas of five barnacles from each temperature treatment were dissected, frozen with liquid nitrogen, and stored at -80 [degrees]C for analyses of endogenous Hsp70 and ubiquitin conjugate (see methods outlined below).
After this time, the prosoma was removed from each barnacle, immediately frozen with liquid nitrogen, and stored at -80 [degrees]C for analyses of endogenous Hsp70 and ubiquitin conjugate (see methods outlined below).