BIOL 2030 Chapter Notes - Chapter 7: Acorn Worm, Molgula, Tunicate
26 Feb 2017
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Abdomen consist of a trunk and segmented tail. Anus is located on the 5th tail segment. 6th segment consist of a basal bulb(produces toxin) and sting (cid:120) Identify: (cid:190) trunk (cid:190) small chelate chelicerae (cid:190) large chelate pedipalps (cid:190) 4 paris of walking legs (cid:190) simple eyes (cid:190) pectines (cid:190) pair of comb-like structures (said to be sensory in functions) (cid:190) genital operculum. Basal joints assist in mechanical preparation of food. Male: terminal join of the pedipalp appears swollen and acts as an organ where sperm cells are conveyed. Spinnerets function as silk producing glands (cid:120) Identify: (cid:190) cephalothorax (cid:190) abdomen (cid:190) peipalps (cid:190) basal joints (cid:190) genital opening (cid:190) spinnerets. First body somite bears a pair of jointed poison claws. Last pair of legs is the longest and is used for defense by pinching. Last to legless somites are the pregenital and genital segments (cid:120)
