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Xiphosura (/ z ɪ f oʊ ˈ sj ʊər ə /; [2] from Ancient Greek ξίφος (xíphos) 'sword' and οὐρά (ourá) 'tail', in reference to its sword-like telson) is an order of arthropods related to arachnids.
Insects, which are a type of arthropod, are the most numerous group of multicellular organisms on the planet, with over a million species identified so far. [1] The title of heaviest insect in the world has many contenders, the most frequently crowned of which is the larval stage of the goliath beetle , Goliathus goliatus , the maximum size of ...
Millipedes (originating from the Latin mille, "thousand", and pes, "foot") [1] [2] are a group of arthropods that are characterised by having two pairs of jointed legs on most body segments; they are known scientifically as the class Diplopoda, the name derived from this feature.
The infraorder name Isoptera is derived from the Greek words iso (equal) and ptera (winged), which refers to the nearly equal size of the fore and hind wings. [15] " Termite" derives from the Latin and Late Latin word termes ("woodworm, white ant"), altered by the influence of Latin terere ("to rub, wear, erode") from the earlier word tarmes.
In some species all the legs are functionless, apart from the front pair in males. The abdomen is long and roughly cylindrical, with ten segments and two or three long cerci (tail-like appendages) at the tip. Like Entognatha, Archaeognatha and Zygentoma, the spiracles on the abdomen do not have closing muscles.
Brachiopod fossils show great diversity in the morphology of the shells and lophophore, while the modern genera show less diversity but provide soft-bodied characteristics. Both fossils and extant species have limitations that make it difficult to produce a comprehensive classification of brachiopods based on morphology.
Additional evidence emerged when F. A. McKittrick (1965) noted similar morphological characteristics between some termites and cockroach nymphs. [18] The similarities among these cockroaches and termites have led some scientists to reclassify termites as a single family, the Termitidae , within the order Blattodea.
The clutch is typically three to five eggs (range two to six), which are usually whitish-buff or greenish-blue and are spotted with red, purple or brown. [18] The average size of the egg is 30 mm × 22 mm (1.18 in × 0.87 in), and weighs 7.8 g (0.28 oz), of which 6% is shell. [ 16 ]