NATS 4205 Lecture Notes - Lecture 2: Tent Caterpillar, Hemimetabolism, Pupa
19 Nov 2017
School
Department
Course
Professor
Document Summary
Lateral ns: lateral line along the body = coordination of di erent parts along the body. Segmented ns: into parts due to segmented body parts (not like ours) Lower ganglia: (bundle of nerves) most are below digestive system (vs. ours in upper body) Decentralized ns: if the head is cut, the body will continue to move. Eggs: majority lay eggs, covered in protection/material/silk or hidden under leaves etc. Egg placement: often laid in groups (varies among species) & can be laid in shapes. Eastern tent caterpillar: moth lays eggs wrapped in ring/cylinder around a tree twig. Ecdysis: (molting) process of shedding external skeleton. Vulnerability: takes hours & new skeleton takes time to get hard (easy prey, rain, temp) Process: new endocuticle secreted -> fully formed underneath -> exocuticle (old one) shed o with muscle contractions/swallowing of air to get bigger & crack it o . Recycling: some larvae will recycle old skeleton by eating it.
