Subphylum Myriapoda is divided into four classes: Chilopoda, Symphyla, Diplopoda, and Pauropoda. Centipedes like Scutigera coleoptrata (Figure 2a) are classified as chilopods. These animals bear one pair of legs per segment, mandibles as mouthparts, and are somewhat dorsoventrally flattened.

Apr 25, 2025 · In addition, the phylum Arthropoda contains the extinct subphylum Trilobitomorpha. This group is made up of the trilobites, the dominant arthropods in the early Paleozoic seas (541.0 million to 251.9 million years ago).

Apr 25, 2025 · Subphylum Myriapoda Chiefly terrestrial; segmental appendages primitively unbranched; head appendages comprise a pair of antennae, a pair of mandibles, and 1 or 2 pairs of maxillae; trunk and appendages variable; respiratory organs are tracheae.

Arthropods are invertebrate animals with a chitinous exoskeleton, segmented bodies, and jointed legs. The phylum Arthropoda contains numerous taxonomic orders in over 20 classes. Subphylum Hexapoda

Arthropods are classified into five sub-phylum and each then subdivide into classes (a total of 16 classes according to recent classification of animal taxa). Classification of Arthropods I. Sub-phylum: Trilobitomorpha (extinct arthropods)

Nov 23, 2024 · This subphylum includes animals such as spiders, scorpions, horseshoe crabs, and sea spiders and is predominantly terrestrial, although some marine species also exist. An estimated 77,000 species, found in almost all habitats, are included in subphylum Chelicerata.

Arthropods (/ ˈ ɑːr θ r ə ˌ p ɒ d / AR-thrə-pod) [3] [4] are invertebrates in the phylum Arthropoda. They possess an exoskeleton with a cuticle made of chitin, often mineralised with calcium carbonate, a body with differentiated segments, and paired jointed appendages.

Subphylum Hexapoda. This subphylum contains the insects, the largest and most diverse class of arthropods. Hexapods have six legs, a body divided into three parts (head, thorax, abdomen), and typically have wings at some stage of their life cycle. They are …

Subphylum Crustacea. Most marine arthropods belong to the subphylum called Crustacea (Fig. 3.79). Most crustaceans live in the ocean, where they are so abundant that they are often called “insects of the sea.” Crabs, shrimp, and lobsters commonly live along the shoreline.

Subphylum Myriapoda comprises arthropods with numerous legs. Although the name is misleading, suggesting that thousands of legs are present in these invertebrates, the number of legs typically varies from 10 to 750. This subphylum includes 16,000 species; the most commonly found examples are millipedes and centipedes.