3454lablecture7 - LECTURE 7 PHYLUM ARTHROPODA AND PHYLUM...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
LECTURE 7 PHYLUM ARTHROPODA AND PHYLUM ONYCHOPHORA PHYLUM ONYCHOPHORA Have characters of both Annelida and Uniramia Have segments with no septa, unjointed limbs, antennae, mandibles, chitin, exoskeleton Use metanephridia for excretion, one in each segment Use tracheal system with spiracles for respiration Have hydrostatic skeleton, move like worms Lay eggs (no larval stage) Adapted from marine forms similar to polychaetes, now restricted to moist tropical and mountainous rain forests PHYLUM ARTHROPODA SUBPHYLUM UNIRAMIA General characteristics of arthropods plus: unbranched limbs (uniramous), distinct head, 1 pair of antennae, 1 pair of mandibles, 1 or 2 pairs of maxillae (2 nd pair fused to form labium), breathe with spiracles leading to tracheal system (some have “air pumps” in wing musculature), use malphigian tubules to excrete uric acid (conserves water) Important and numerous group: pollination, pest control, disease vectors, crop destruction CLASS CHILOPODA (CENTIPEDES) Relatively untagmatized, 1 pair of limbs and spiracles per segment, simple eyes (some
Background image of page 1

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

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 11/29/2009 for the course BIOLOGY 3454 taught by Professor Nelson during the Spring '09 term at UT Arlington.

Page1 / 3

3454lablecture7 - LECTURE 7 PHYLUM ARTHROPODA AND PHYLUM...

This preview shows document pages 1 - 2. Sign up to view the full document.

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