Ward_Lect31A_Arthropoda 1 ppt

Ward_Lect31A_Arthropoda 1 ppt - BIS2C Winter 2009 (Ward)...

Info iconThis preview shows pages 1–17. Sign up to view the full content.

View Full Document Right Arrow Icon
BIS2C Winter 2009 (Ward) Lecture 31. Arthropoda, Part 1 Today’s lecture (4 March) introduction to Arthropoda major features within-group diversity (part) Friday lecture Arthropoda, Part 2
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Major lineages of metazoans
Background image of page 2
Protostomes Arthropoda molting of exoskeleton, regulated by ecdysone
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Numbers of described species among the major animal groups (from Wilson, 1992). Sponges and diploblasts
Background image of page 4
Numbers of described species among the major animal groups (from Wilson, 1992). Mollusca
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Numbers of described species among the major animal groups (from Wilson, 1992). Annelida
Background image of page 6
Numbers of described species among the major animal groups (from Wilson, 1992). Arthropoda
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Arthropoda – a hyperdiverse group extraordinary diversity, comprising about 3/4 of all described animal species many other species undescribed or undiscovered, perhaps 50+ million species altogether found in all habitats (marine, freshwater, terrestrial)
Background image of page 8
Arthropoda Bilaterally symmetrical coelomate protostomes with… segmented body , with structures repeated in each segment
Background image of page 9

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Arthropoda Bilaterally symmetrical coelomate protostomes with… segmented body, with structures repeated in each segment paired jointed appendages with internal muscle attachments
Background image of page 10
Arthropoda Bilaterally symmetrical coelomate protostomes with… segmented body, with structures repeated in each segment paired jointed appendages with internal muscle attachments The name Arthropoda = “jointed foot”
Background image of page 11

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Arthropoda Bilaterally symmetrical coelomate protostomes with… segmented body, with structures repeated in each segment paired jointed appendages strong tendency towards tagmosis : regional specialization of body ( tagmata , e.g., head, thorax, abdomen)
Background image of page 12
Degree of tagmosis (division into functional subunits ) varies among different kinds of arthropods Centipede Lobster
Background image of page 13

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Arthropoda Bilaterally symmetrical coelomate protostomes with… segmented body, with structures repeated in each segment paired jointed appendages tagmosis: division of body into functional subunits exoskeleton (composed of chitin and cuticle proteins) organized into articulating plates Courtesy of: http://evolution.berkeley.edu/evolibrary/home.php
Background image of page 14
Consequences of an exoskeleton support for walking on land protection against predators chitin reduces water loss But it also introduces constraints on growth…
Background image of page 15

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Arthropoda Bilaterally symmetrical coelomate protostomes with… segmented body, with structures repeated in each segment paired jointed appendages
Background image of page 16
Image of page 17
This is the end of the preview. Sign up to access the rest of the document.

This document was uploaded on 04/02/2009.

Page1 / 54

Ward_Lect31A_Arthropoda 1 ppt - BIS2C Winter 2009 (Ward)...

This preview shows document pages 1 - 17. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online