prosoma

(redirected from prosomal)
Also found in: Dictionary, Encyclopedia.

prosoma

(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·so′mal adj.

prosoma

the anterior part of the main body of arachnids.
Mentioned in ?
References in periodicals archive ?
Laboratory running wheel group: The activity of this group of 14 animals (prosomal width: 17.5 [+ or -] 0.8 cm) was monitored using "running wheels," constructed as described in Chabot et at.
Summary of prosomal widths for horseshoe crabs within Delaware Bay during the spring of 2003 to 2005.
For some states, the average weight of horseshoe crabs was not available, and therefore we used the PW-weight equations that were derived from this study to estimate the average weight of horseshoe crabs based on an average measured prosomal width.
Topography and size of glands.--One prosomal sac-like scent gland is situated directly beneath the integument on each side of the carapace.
Ventral prosomal complex of male with coxae of legs 11 and IV meeting in the midline, but coxae I and III not so (Fig.
The ventral side of the embryo is flattened, the prosomal appendages (chelicerae, pedipalps, and walking legs) have begun to lengthen, the stomodaeum is located slightly anterior to the chelicerae, and the lateral organs have begun to develop (Sekiguchi et al., 1982).
By contrast, in spiders, both leg and prosomal muscles are heavily involved in locomotion (Anderson & Prestwich 1974) and opisthosomal mass was often no more than 40% of total mass (Prestwich 1983a, b).
We used the patterns, together with fragments of retinal pigments that remained inside the cornea of the molt (a result of scarring), as landmarks to completely reconstruct the right eye of a Stage IX molt (prosomal width, 30 mm).
Later we estimated the prosomal area ([length.sub.max] x [width.sub.max]) on this random sample of ten spiderlings of each brood using scaled digital pictures.
Because these objects were designed for experiments with adults, their size was reduced proportionally for s mall juveniles (prosomal width range = 2-14 cm).
Rather, the uniqueness of the method is attributable both to the prosomal source of the materials, the venom glands (Kovoor 1987; Kovoor & Zylberberg 1972), and to the forceful and directed ejection of the mixture (Millot 1930; Bristowe 1931).
We collected data regarding sex, spawning state, and size (prosomal width) from 56 pairs along 125 m of beach in 2001, 84 pairs throughout the bay in 2002, and an additional 761 crabs, including single males and females and satellite males.