ENTOGNATHA
Hexapoda Insecta Pterygota Neoptera Holometabola Apterygotes Entognatha Archaeognatha Hexapoda Zygentoma Ephemeroptera Insecta Odonata Plecoptera Embiodea Pterygota Zoraptera Dermaptera Grylloblattodea ? Mantophasmatodea Orthoptera Phasmatodea Blattaria Isoptera Mantodea Neoptera Psocoptera Phthiraptera Thysanoptera Hemiptera Coleoptera Rhaphidioptera Megaloptera Neuroptera Hymenoptera Holometabola Mecoptera Siphonaptera Diptera Apterygotes Strepsiptera Trichoptera Paleoptera Lepidoptera Hemimetabolous Holometabolous
Relationships among Hexapoda Collembola Entognatha Protura Diplura Hexapoda Archaeognatha Insecta Thysanura Pterygota
What makes an entognathan an entognathan?? mandibles - moncondylic antennae - muscles on all segments gnathal pouch
What makes an entognathan an entognathan?? Ametabolous development Can be: epimorphic or anamorphic Same number of segments on each moult Segment added on each moult
Phylogeny of the Entognatha Antennae Springing mechanism No cerci Collembola (springtails) Protura Entognatha No antennae No springing mechanism Diplura Cerci
Hexapod Orders Diplura Diplo - two, ura - tails Number of Species ca. 800 Common names coneheads, diplurans Typical habitats Moist, cool areas - soil, leaf litter, moss Distinguishing characteristics mouthparts recessed in a pouch cerci eyeless small (about 1.5 cm) indirect mating - stalked spermatophore epimorphic development Other features
Hexapod Orders Protura Proto - first, ura - tail Number of Species ca. 500 Common names None - proturans Typical habitats Moist, cool areas - soil, leaf litter Distinguishing characteristics mouthparts recessed in a pouch no cerci anamorphic development small (< 2 mm) walk with forelegs held aloft eyeless Other features
Hexapod Orders Collembola Coll - glue, embol - wedge or peg Number of Species > 6000 Common names springtails, snow fleas Typical habitats Variable - soil, leaf litter, moss, aquatic Distinguishing characteristics mouthparts recessed in a pouch no cerci epimorphic development small (2 - 3 mm) spring mechanism collophore can have up to 50 adult moults Other features
Collembola - Features Collophore
Collembola - Features Spring - Jumping Mechanism retinaculum furca
Collembola - Features Spring - Jumping Mechanism furca (cross section) retinaculum
Collembola - Features
Snow Fleas - Collembola
INSECT - APTERYGOTA
Hexapoda Insecta Pterygota Neoptera Holometabola Apterygotes Entognatha Archaeognatha Hexapoda Zygentoma = Thysanura Ephemeroptera Insecta Odonata Plecoptera Embiodea Pterygota Zoraptera Dermaptera Grylloblattodea ? Mantophasmatodea Orthoptera Phasmatodea Blattaria Isoptera Mantodea Neoptera Psocoptera Phthiraptera Thysanoptera Hemiptera Coleoptera Rhaphidioptera Megaloptera Neuroptera Hymenoptera Holometabola Mecoptera Siphonaptera Diptera Apterygotes Strepsiptera Trichoptera Paleoptera Lepidoptera Hemimetabolous Holometabolous
Archaeognatha Insecta Thysanura Pterygota Mandibles long - Molar Mandibles long - Molar & incisor surfaces - separated No wings Mouthparts exposed Archaeognatha Incisor Insecta Thysanura Mandibles short - Molar & incisor surfaces - close Molar Pterygota Incisor Wings Mouthparts exposed
Hexapod Orders Archaeognatha Archaeo - ancient, gnatha - jaw Number of Species ca. 350 Common names bristletails Typical habitats Variable - moist, cool to desert and chaparral Distinguishing characteristics mouthparts exposed mandible with molar & incisor surfaces separate Other features development is epimorphic
Hexapod Orders Thysanura Thysano -bristle, fringe ura - tail Number of Species ca. 400 Common names silverfish, firebrats Typical habitats Variable - moist, cool, dark - litter, houses Distinguishing characteristics mandible - molar and incisor surfaces close covered in scales ametabolous can live for 6 years (through 60 moults) Other features
Thysanura -panoistic ovariole
Review of Wingless Hexapoda Antennae Furca Collembola No cerci Mouthparts in pouch Entognatha No antennae No furca Protura Cerci Diplura Hexapoda Mandibles with molar & incisor surfaces separated Archaeognatha Mouthparts exposed Insecta Mandibles with molar & incisor surfaces close Thysanura