Insects 9 (2) PDF

Abdomen Other abdominal structures may also be present in some insects. Abdominal prolegs: fleshy, locomotory appendages found only in the larvae of certain orders (Lepidoptera, Mecoptera and some Hymenoptera)  Abdomen Other abdominal structures may also be present in some...

Abdomen Other abdominal structures may also be present in some insects. Abdominal prolegs: fleshy, locomotory appendages found only in the larvae of certain orders (Lepidoptera, Mecoptera and some Hymenoptera)  Abdomen Other abdominal structures may also be present in some insects: Sting: a modified ovipositor, found only in the females of Hymenoptera (ants, bees, and predatory wasps).  Abdomen Other abdominal structures may also be present in some insects: Abdominal gills : respiratory organs found in the nymphs of certain aquatic insects. In Ephemeroptera, paired gills are located along the sides of each abdominal segment. In Odonata (damselflies), the gills are attached to the end of the abdomen.  Abdomen Other abdominal structures may also be present in some insects: Furcula: the "springtail" jumping organ found in Collembola on the ventral side of the fifth abdominal segment. Tenaculum :A clasp on the third abdominal segment holds the springtail in its position.  Abdomen Other abdominal structures may also be present in some insects. Collophore: a fleshy, peg-like structure found in Collembola on the ventral side of the first abdominal segment. -It appears to maintain homeostasis by regulating absorption of water from the environment and secret mucus substance.  METAMORPHOSIS “CHANGE IN FORM” That some insects go through during their life cycle METAMORPHOSIS  METAMORPHOSIS Ametabolous Ametabolism is a type of growth or life cycle in insects in which there is slight or no metamorphosis, only a gradual increase in size. It is present only in primitive wingless insects METAMORPHOSIS Ametabolous  INCOMPLETE METAMORPHOSIS Hemimetabolism Hemimetabolism or hemimetaboly. Also called incomplete metamorphosis includes three distinct stages: the egg, nymph, and the adult stage, or imago. there is no pupal stage. The nymph often has a thin exoskeleton and resembles the adult stage but lacks wings and functional reproductive organs. The hemimetabolous insects differ from ametabolous taxa in that the one and only adult instar undergoes no further molting means no skin development INCOMPLETE METAMORPHOSIS Hemimetabolous  INCOMPLETE METAMORPHOSIS Hemimetabolous A type of development that includes 3 distinct stages egg*nymph*adult (the baby looks like the adult)