ArthropodaTaxonomy Metamerism &...

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BIO2135 – Animal Form and Function

Phylum Arthropoda Pt. IMiller and Harley Chap. 14

BIO2135 – Animal Form and Function

Arthropoda Phylogeny

Fig. 14.2

BIO2135 – Animal Form and Function

Arthropoda Taxonomy● Sub-phylum Trilobitomorpha

– Marine, all extinct, 3 longitudinal lobes

● Sub-phylum Chelicerata– 2 tagma (prosoma & opisthosoma), 1st pair of

appendages modified into feeding chelicera

● Sub-phylum Myriapoda– Body divided into head and trunk, 4 pairs of

head appendages, uniramous appendages

● Sub-phylum Crustacea– Mostly aquatic, head with 2 pairs of antennae,

one pair of mandibles, 2 pairs of maxillae, biramous appendages

● Sub-phylum Hexapoda– Body divided into head, thorax and abdomen;

5 pairs of appendages on head, 3 pairs uniramous appendages on thorax only

BIO2135 – Animal Form and Function

Metamerism & Tagmatization

BIO2135 – Animal Form and Function

Arthropod Exoskeleton

Fig. 14.3

BIO2135 – Animal Form and Function

Modifications & Articulations

Fig. 14.4

2

BIO2135 – Animal Form and Function

Ecdysis

Fig. 14.5

BIO2135 – Animal Form and Function

Ecdysis

Fig. 14.5

BIO2135 – Animal Form and Function

Ecdysis

Fig. 14.5

BIO2135 – Animal Form and Function

Spider Molting

BIO2135 – Animal Form and Function

Crab Molting

BIO2135 – Animal Form and Function

Class Merostomata

Fig. 14.8

3

BIO2135 – Animal Form and Function

Class ArachnidaOrder Aranea

Fig. 14.12

BIO2135 – Animal Form and Function

Book Lung

Fig. 14.9

BIO2135 – Animal Form and Function

Sense Organs

Fig. 14.10 & 14.13

BIO2135 – Animal Form and Function

ExcretionFig. 28.13 & 28.14

BIO2135 – Animal Form and Function

Venomous SpidersBlack Widow Brown Recluse

Fig. 14.14

BIO2135 – Animal Form and Function

Brown Recluse Haemolytic Venom

4

BIO2135 – Animal Form and Function

Class ArachnidaOrder Scorpionida

Fig. 14.11

BIO2135 – Animal Form and Function

Class ArachnidaOrder Acarina

Fig. 14.17

BIO2135 – Animal Form and Function

Sub-Phylum MyriapodaClass Diplopoda

Collum

Antenna

Eye

MandibleMaxilla

Fig. 14.9

BIO2135 – Animal Form and Function

Sub-Phylum MyriapodaClass Chilopoda

Fig. 14.9

Antenna

2nd Maxilla

1st Maxilla

Maxillipede(Venom Gland)

Eye

1st Leg

BIO2135 – Animal Form and Function

Next Class – Arthropoda Pt. II

Miller and Harley Chap. 15