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Arthropods

An arthropod is an invertebrate animal having an exoskeleton (external skeleton), a segmented body, and jointed appendages. Arthropods are members of the phylum Arthropoda (from Greek ἄρθρον árthron, "joint", and ποδός podós "foot", which together mean "jointed feet"), and include the insects, arachnids, crustaceans, and others. Arthropods are characterized by their jointed limbs and cuticles, which are mainly made of α-chitin; the cuticles of crustaceans are also biomineralized with calcium carbonate. The rigid cuticle inhibits growth, so arthropods replace it periodically by molting. The arthropod body plan consists of repeated segments, each with a pair of appendages. They have over a million described species, making up more than 80% of all described living animal species. Source: Wikipedia


- Myriapoda
  The subphylum Myriapoda comprises millipedes, centipedes, and their relatives and have many body segments, each bearing one or two pairs of legs. 
They aresometimes grouped with the hexapods. Source: Wikipedia

For an article on Myriapoda go to Polydesmid millipedes at Protea Hill Farm, Lusaka

- Insects
  Insects or Hexapoda comprise insects and three small orders of insect-like animals with six thoracic legs. They are sometimes grouped with the myriapods, in a group called Uniramia, though genetic evidence tends to support a closer relationship between hexapods and crustaceans.

The subphylum Hexapoda (from the Greek for six legs) constitutes the largest (in terms of number of species) grouping of arthropods and includes the insects as well as three much smaller groups of wingless arthropods: Collembola, Protura, and Diplura (all of these were once considered insects). The Collembola (or springtails) are very abundant in terrestrial environments. Hexapods are named for their most distinctive feature: a consolidated thorax with three pairs of legs. Most other arthropods have more than three pairs of legs. Source: Wikipedia

To see examples of the various insect families go to insect families


See the pictures of all Zambian Butterflies by clicking on the collage below

collage of Zambian butterflies


- Arachnids
   Arachnids are a class (Arachnida) of joint-legged invertebrate animals in the subphylum Chelicerata. All arachnids have eight legs, although in some species the front pair may convert to a sensory function. The term is derived from the Greek word ἀράχνη (aráchnē), meaning "spider".

Almost all extant arachnids are terrestrial. However, some inhabit freshwater environments and, with the exception of the pelagic zone, marine environments as well. They comprise over 100,000 named species, including spiders, scorpions, harvestmen, ticks, mites and Solifugae. Source: Wikipedia

Arachnids occurring in Zambia:


Pseudocreobotra wahlbergii
Pseudocreobotra wahlbergii

bushcricket
bushcricket

Bunaea alcinoe
Bunaea alcinoe

Crocothemis
Crocothemis

 Updated: 15 April 2014
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