4/14 Organismal Biology Notes
4/14 Organismal Biology Notes BIOL 1030 - 002
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This 2 page Class Notes was uploaded by Emma Cox on Sunday April 17, 2016. The Class Notes belongs to BIOL 1030 - 002 at Auburn University taught by Debbie R. Folkerts in Summer 2015. Since its upload, it has received 21 views. For similar materials see Organismal Biology in Biology at Auburn University.
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Date Created: 04/17/16
Lophotrochozoa PHYLUM ANNELIDA Segmented woms o Protostome, eucoelomate, trochophore larvae o Metamerism (segmented) – somites (body units) Adaptation for burrowing Burrowing Extended-anchor-pull Circular and longitudinal muscles o Circular – when contracted = extend length of worm o Longitudinal – make worm short and fat Chaetae – retrorse and retractable o Repetition of organs, ex. metanephridia (each and every separate excretory system) Nephrostome Post septal coiled tubule Capillary network Nephridiophore Class Oligochaeta o Relatively few chaetae (bristles) o Marine, freshwater, and terrestrial o Tubifex tubifex, stylaria, giant earthworms o Clitellum Mucus production for mutual sperm transfer and cocoon formation Hermaphroditic Female pores anterior to male pores Seminal groove (sperm groove) – when sperm are released from the male gonopore, they travel down that tube Mucus produced at clitellum forms a cocoon Class Polychaeta o Many chaetae o Errant and sedentary marine worms o Nereis – sandworm Errant Parapodia – for stepping and walking, on every segment o More developed head o Sea mouse o Chaetopterus Parchment tubeworm Sedentary Heteronomy o Sabellids Feather duster, fan worms Sedentary Radioles o Lugworm – Arenicola Sedentary burrowers Castings o Pololo – Eunice viridis Errant Epitoky (atoke + and epitokes) Nymphomaniac zombies ? Class Hirudinea o Parasitic and predaceous leeches o Freshwater, marine, terrestrial o No chatae o No internal septae o Ectoparasites o Hiruda medicinalis – medicinal leech Stylets within anterior sucker Salivary secretions Anaesthetic Anticoagulant antiseptic
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