
1) Ants
Found on
https://www.crosswordclues.com/clue/arthropods

1) Spiders and crabs
Found on
https://www.crosswordclues.com/clue/arthropods

The most common group of animals inhabiting caves, including insects, crustaceans, spiders, millipedes, etc. They have jointed limbs and external skeletons.
Found on
http://www.cancaver.ca/docs/glossary.htm

Animals belonging to the phylum Arthropoda.
Found on
http://www.earthlife.net/insects/glossary.html

(pronounced AHR-throw-pods) Arthropods are a group of animals with exoskeletons made of chitin, segmented bodies, and jointed limbs. Insects, arachnids, trilobites, crustaceans, and others are arthropods. ARTHURDACTYLUS
Found on
http://www.enchantedlearning.com/subjects/dinosaurs/glossary/

Members of the phylum arthropoda of the animal kingdom, composed of organisms having a hard, jointed exoskeleton and paired jointed legs, and including among other classes, the arachnida and insects, many species of which are important medically as parasites or as vectors of organisms capable of causing disease in man. ... (12 Dec 1998) ...
Found on
http://www.encyclo.co.uk/local/20973

are Invertebrates that have an external skeleton instead of an internal skeleton. Common members of this group are the Insects, Arachnids (Spiders) and Centipedes and Millipedes.
Found on
http://www.encyclo.co.uk/local/21282

Phylum of segmented animals that have hard outer skeletons. Phylum includes insects, arachnids, and crustaceans. There are over 1 million species in this phylum. This is the largest phylum of invertebrates.
Found on
http://www.encyclo.co.uk/local/22214

Invertebrate animals (phylum Arthropoda) with jointed legs and a hard external skeleton, e.g. insects, spiders, crustaceans and millipedes.
Found on
http://www.encyclo.co.uk/visitor-contributions.php

This is a big group of invertebrate animals. They all have jointed legs. It includes insects, crustaceans and arachnids (spiders).
Found on
https://www.encyclo.co.uk/local/20689
No exact match found.