Arachnid anatomy: (1) four pairs of legs (2) prosoma (cephalothorax) (3) opisthosoma (abdomen)
Posterior body part of some arthropods
The opisthosoma is the posterior part of the body in some arthropods, behind the prosoma (cephalothorax).[1] It is a distinctive feature of the subphylum Chelicerata (arachnids, horseshoe crabs and others). Although it is similar in most respects to an abdomen (and is often referred to as such), the opisthosoma is differentiated by its inclusion of the respiratory organs (book lungs or book gills) and the heart.
^Peter Ax (28 August 2000). "Chelicerata". Multicellular Animals. Springer. pp. 83–85. ISBN 978-3-540-67406-1.
The opisthosoma is the posterior part of the body in some arthropods, behind the prosoma (cephalothorax). It is a distinctive feature of the subphylum...
cephalothorax, is the anterior tagma, and the 10-segmented abdomen, or opisthosoma, is the posterior tagma. The abdominal tergites and sternites are separated...
open the old exoskeleton, the spider generally contracts its abdomen (opisthosoma) to supply enough fluid to pump into the prosoma with sufficient pressure...
larger in large males, have an alternating black and white fringe. The opisthosoma is black with several white markings on the dorsum - a basal band, a...
and the opisthosoma. The prosoma is commonly known as the cephalothorax, and the opisthosoma is commonly known as the abdomen. The opisthosoma is considered...
(The terms prosoma and opisthosoma are equivalent to cephalothorax and abdomen in some groups. The terms prosoma and opisthosoma may be preferred by some...
millimetres to a few centimetres in body length and had segmented abdomens (opisthosoma), with the dorsal exoskeleton (tergites) across the backs of the animals'...
main parts, the prosoma (or cephalothorax) and the opisthosoma (or abdomen). The prosoma and opisthosoma are connected by the pedicel, or pregenital somite...
prosoma and opisthosoma. The prosoma may be evenly domed (e.g. Pholcus, Micropholcus) or have a furrow or pit in the middle. The opisthosoma may be long...
segments are fused into two tagmata, the cephalothorax or prosoma, and the opisthosoma, or abdomen, and joined by a small, cylindrical pedicel. However, as...
modern forms, the whole of the opisthosoma is fused into a single unsegmented structure. The underside of the opisthosoma carries the genital openings and...
scorpions and relatives), the term "abdomen" is used interchangeably with "opisthosoma" ("hind body"), which is the body section posterior to that bearing the...
or tagmata: the cephalothorax or prosoma, and the abdomen or opisthosoma. The opisthosoma is subdivided into a broad anterior portion, the mesosoma or...
Scorpion's Strike: New Evidence of Extreme Lateral Flexibility in the Opisthosoma of Eurypterids". The American Naturalist. 190 (1): 152–156. doi:10.1086/691967...
are divided into two tagmata (arthropod body regions): the abdomen (opisthosoma) and the cephalothorax (prosoma). Unlike spiders, the juncture between...
arachnids, Amblypygi possess two body segments; the prosoma and the opisthosoma, (often referred to as the cephalothorax and abdomen), four pairs of...
the back part of the abdomen, and another one on the front part of the opisthosoma. There are two small white dots on the posterior back, and two even smaller...
have a varied color. The prosoma, legs and sternum are brown, and the opisthosoma is dark. Males grow from 30 to 35 mm in length. Females The females are...
female (XUC-2013-013) E abdomen, lateral view F posterior portion of opisthosoma, ventral view, showing spinnerets G female genitalia (XUC-2013-013),...
organized into two tagmata, called the prosoma, or cephalothorax, and the opisthosoma, or abdomen. (However, there is currently neither fossil nor embryological...
The chelicerate body plan consists of two tagmata, the prosoma and the opisthosoma, except that mites have lost a visible division between these sections...
cephalothorax (prosoma) is light yellowish to red-brown, but the abdomen (opisthosoma) is definitely green or yellowish green, with four pairs of black lateral...
the fifth segment of the mother's ventral opisthosoma. The female refuses to eat and holds her opisthosoma in an upward arch so that the broodsac does...
head) or prosoma, and an opisthosoma or abdomen. Segmentation has almost entirely been lost and the prosoma and opisthosoma are fused, only the positioning...
The body is divided into an anterior prosoma and a posterior segmented opisthosoma. The prosoma is shielded by a subtriangular, undivided carapace with...
only live to 3. Their carapace is a blueish-greenish color, with a blue opisthosoma with long reddish hairs. The legs are a bright blue, white hairs covering...
Acari that lack their primary somatic segmentation of the abdomen (or opisthosoma), rather these parasitic arachnids present a subsequent fusion of the...
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