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Classification of Living Hexapod Orders
Class Hexapoda (“six-legged” animals) “Entognatha” (entognathous apterygotes) (3 orders) Protura, Collembola, Diplura Insecta (“ectognatha” or insects) (28 orders) Some characters of the Insecta: ectognathous mouthparts only 3 musculated antennal segments multi-segmented tarsi well-developed compound eyes tentorium present “Apterygota” (ectognathous apterygote) (2 orders) Microcoryphia (=Archaeognatha) Thysanura
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Order Microcoryphia
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Microcoryphia (head) eyes, contiguous dorsally lateral ocellus
median ocellus antennae prominent eyes large ocelli present mouthparts ectognathous
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Microcoryphia (head) monocondylic mandibles Protura Collembola Diplura
dicondylic mandibles all other hexapod orders 2 condyles 1 condyle
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Microcoryphia (thorax)
wings absent thorax strongly arched legs cursorial coxal stylus tarsus 2-3 segmented
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Microcoryphia (abdomen)
sternite 10 segmented styli present exsertile vesicles usually present median caudal filament present cerci present coxa stylus exsertile vesicles median caudal filament cercus
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Microcoryphia (abdomen)
cercus median caudal filament gonapophysis 8 gonocoxite 8 gonapophysis 9 gonocoxite 9 female ovipositor structures
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Microcoryphia (biology/ecology)
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Microcoryphia (biology/ecology)
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Order Microcoryphia
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Microcoryphia (fauna)
World Fauna 2 families ca. 350 species North American Fauna Machilidae (lab) Meinertellidae ca. 20 species
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Order Microcoryphia FINIS
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