What distinguishes Class Arachnida membership for the Woodlouse Hunter Spider?
Answer
Possession of eight legs and a cephalothorax/abdomen division.
The Class Arachnida provides a critical refinement over the broader Phylum Arthropoda by specifying body organization and limb count, clearly separating spiders from insects. Arachnids are defined by having eight legs, which is the key differentiator from insects that possess only six. Furthermore, the body is fused into two primary regions: the cephalothorax (a fusion of the head and thorax) and the abdomen. Unlike insects which have three distinct body sections, the arachnid body layout is consolidated, and they typically feature specialized mouthparts like chelicerae and pedipalps instead of the prominent antennae seen on insects.
Related Questions
What fundamental characteristic defines the Kingdom Animalia placement of the Woodlouse Spider?Which anatomical features characterize the Phylum Arthropoda classification of *Dysdera*?What distinguishes Class Arachnida membership for the Woodlouse Hunter Spider?What specialized organ unites members of the Order Araneae, including *Dysdera*?What specific predatory adaptation defines the Family Dysderidae placement of *Dysdera*?What general morphology is consistently found across species in the Genus *Dysdera*?What does the specific epithet *crocata* in *Dysdera crocata* primarily refer to?How does placement in Phylum Arthropoda refine the *Dysdera* classification from Kingdom Animalia?Why are the large, protruding chelicerae of *Dysdera crocata* significant taxonomically?How does the *Dysdera* spider's use of silk contrast with general traits of Order Araneae?