Phylum? Arthropoda Subphylum? Chelicerata Common name? Horseshoe crab Phylum? Arthropoda Subphylum? Chelicerata Common Name? Sea spider Phylum: Arthropoda Common name: Amphipod Common name? Isopod What is this? An amphipod What are these? Barnacles What is this? A gooseneck barnacle What is this? A fish louse which is an isopod What are these? Rock lice – which are isopods A: Antenna A B: Cheliped B G C: 3rd Walking Leg D: Carapace C E: Abdomen F: Uropod D E F A: Cardiac stomach D: Digestive gland Pyloric stomach B: E: Heart C: Posterior gastric muscle F: Dorsal abdominal artery G: Ostia of heart A G B C D E F A: Proboscis B: Pedipalp C: Cephalothorax D: Abdomen A B C D A: Abdomen B: Telson C: Compound eye D: Cephalothorax A C B D Phylum? Arthropoda Subphylum? Crustacea Common name? Copepod Note that I am laterally flattened What am I? An amphipod Phylum? Arthropoda Subphylum? Crustacea Decapods Fiddler Crab Phylum? Arthropoda Subphylum? Crustacea Common name? Copepod Phylum? Arthropoda Subphylum? Crustacea How does this animal feed? It is a filter feeder using modified legs called cirri to grab particles from the water column Both of these animals are? Isopods C D A B I G E H F • A: Antennae • B: Antennules • C: Cephalothorax • D: Abdomen • E: Cheliped • F: Walking legs • G: Swimmerets • H: Uropod • I: Telson E A E B C D F • A: Anterior gastric muscle • B: Posterior gastric muscle • C: Gills • D: Heart • E: Rostrum • E: Cardiac stomach • F: Ostia of heart Phylum? Arthropoda Subphylum? Chelicerata Common name? Horseshoe crab C A D B E • A: Abdomen • B: Telson • C: Simple eye • D: Compound eye • E: Cephalothorax B C A D E G F H I • A: Gastric teeth • B: Pyloric stomach • C: Heart • D: Gonad (Testis) • E: Dorsal abdominal artery • F: Intestine • G: Green gland • H: Digestive gland • I: Uropod A D B C • A: Compound eye • B: Pyloric stomach • C: Mandibular muscle • D: Cardiac stomach A B G C D E F • A: Antenna • B: Cheliped • C: Walking leg • D: Carapace • E: Abdomen • F: Telson • G: Antennule Copulatory swimmeret Opening of vas deferens Phylum Arthropoda Subphylum Chelicerata Proboscis Cephalothorax Abdomen A B C D • A: Proboscis • B: Pedipalp • C: Cephalothorax • D: Abdomen.