Sex Me
1. External morphology of exopterygota:
The Exopterygota are all hemimetabolous insects that have wings which develop externally and do not undergo a significant metamorphosis via a pupal stage. Apart from being wingless and smaller, the nymphs (immature stages) of these species are generally quite similar in appearance to the adults.
Endopterygota
Holometabolous insects undergo significant morphological changes during their development. The larvae (mostly grub-like) are very different in appearance to the adults and undergo metamorphosis into the adult form via a non-feeding pupal stage where the body tissues are broken down and rearranged into the adult morphology.
2. Insect Head
Mouthparts: Labrum (1) (Upper lip) Mandibles (2) (Jaws) Maxillae (2) (More jaws) Labium (1) (Lower lip) Hypopharynx (1) (Tongue-like, bears openings of salivary ducts) Labrum-epipharynx (1) (Fleshy inner surface of labrum - sensory)
The orientation of the mouthparts on the head may differ, and they may be described as: Prognathous: projecting forward (horizontal) Hypognathous: projecting downward Opisthognathous: projecting obliquely or posteriorly
Eyes: Compound eyes: Individual units are facets or ommatidia. 28,000 ommatidia comprise a single compound eye in dragonflies Oellus (Ocelli), or simple eyes: small, usually a single lens
3. Antenna
a. Aristate antennae are pouch-like with a lateral bristle. Examples: House and shore flies (order Diptera). b. Capitate antennae are abruptly clubbed at the end. Examples: Butterflies (order Lepidoptera). c. Clavate antennae are gradually clubbed at the end. Examples: Carrion beetles (order Coleoptera). Adult carrion beetles feed on decaying animal matter or maggots. d. Filiform antennae have a thread-like shape. Examples: Ground and longhorned beetles (order
The Exopterygota are all hemimetabolous insects that have wings which develop externally and do not undergo a significant metamorphosis via a pupal stage. Apart from being wingless and smaller, the nymphs (immature stages) of these species are generally quite similar in appearance to the adults.
Endopterygota
Holometabolous insects undergo significant morphological changes during their development. The larvae (mostly grub-like) are very different in appearance to the adults and undergo metamorphosis into the adult form via a non-feeding pupal stage where the body tissues are broken down and rearranged into the adult morphology.
2. Insect Head
Mouthparts: Labrum (1) (Upper lip) Mandibles (2) (Jaws) Maxillae (2) (More jaws) Labium (1) (Lower lip) Hypopharynx (1) (Tongue-like, bears openings of salivary ducts) Labrum-epipharynx (1) (Fleshy inner surface of labrum - sensory)
The orientation of the mouthparts on the head may differ, and they may be described as: Prognathous: projecting forward (horizontal) Hypognathous: projecting downward Opisthognathous: projecting obliquely or posteriorly
Eyes: Compound eyes: Individual units are facets or ommatidia. 28,000 ommatidia comprise a single compound eye in dragonflies Oellus (Ocelli), or simple eyes: small, usually a single lens
3. Antenna
a. Aristate antennae are pouch-like with a lateral bristle. Examples: House and shore flies (order Diptera). b. Capitate antennae are abruptly clubbed at the end. Examples: Butterflies (order Lepidoptera). c. Clavate antennae are gradually clubbed at the end. Examples: Carrion beetles (order Coleoptera). Adult carrion beetles feed on decaying animal matter or maggots. d. Filiform antennae have a thread-like shape. Examples: Ground and longhorned beetles (order