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12 Cards in this Set
- Front
- Back
- 3rd side (hint)
Phylum Arthropoda
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-rigid external skeleton made of chitin (long chain of nitrogen containing sugar molecules arranged in strong fibers, soft or hard)
+provides protection, moisture barrier, muscle attachment -jointed appendages adapted for locomotion, feeding, reproduction, defense, and sensing the environment. -segmented bodies -coelomates -open circulatory systems -organs are well developed Subphylum Chelicerata Class Merostomata Limulus Class Arachnida Subphylum Crustacea Class Crustacea Cambarus Subphylum Uniramia Class Chilopoda Class Diplopoda Class Insecta Romalea |
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Subphylum Chelicerata
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-spiders, mites, ticks, scorpions, daddy longlegs, horseshoe crabs
-Mouthparts are Chelicerae (pincers or fangs) -pedipalps modified for capturing prey, sensing the enviornment, or copulating -two body regions: a cephalothorax (fused head and thoracic segments) and an abdomen (the most posterior body region) -lack antennae Class Merostomata Limulus Class Arachnida |
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Class Merostomata
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*Limulus*
-Horseshoe Crabs -existing since cambrian period -carapace: horseshoe shaped covering the cephalothorax -The ventral surface includes five pairs of appendages modified as walking legs -book gills are where gas exchange occurs |
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Class Archnida
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-Scorpions, Ticks, Mites, Daddy Longlegs, Spiders
-Cephalothorax has chelicerae modified as fangs -has pedipalps to manipulate food and sense the enviornment -has four pair of walking legs -spiders: two body regions and 8 legs -insects: three body regions and 6 legs |
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Subphylum Crustacea
Class Crustacea |
-crayfish, Crabs, Shrimps
-have fundamentally biramous or double branched appendages. -have two pairs of antennae -have compound eyes -opposing mandibles Subphylum Crustacea Class Crustacea *Cambarus |
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Crustacean External Anatomy
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-Two regions: a cephalothorax covered by a carapace and an abdomen
-Five anterior pairs of crustacean appendages are modified into first antennae, second antennae, mandibles, maxillae, and maxillipeds. -Male swimmerets shaped to transfer sperm -analogous: similar functions -homologous: similar forms |
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Crustacean Internal Anatomy
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-Open circulatory system: blood flows from heart to large arteries to gills to sinuses then bathes internal organs. Blood returns to the pericardial sac and enters the heart through small openings called ostia
-Sperm from testes exit the body through a pore at the base of the third pair of walking legs -stomach is a continuous, membranous structure along the dorsal midline of the cephalothorax |
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Subphylum Uniramia
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-centipeds, millipedes, and insects
-they have a uniramous, or single branched appendages Class Chilopoda Class Diplopoda Class Insecta Romalea |
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Class Chilopoda
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-centipedes
-each body segment bears a pair of legs -The large fangs on the head are not mandibles but are maxillipeds -carnivorous |
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Class Diplopda
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(Millipedes)
-herbivores -each segment has two pairs of legs |
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Class Insecta
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*Romalea* -grasshopper
-flies, grasshoppers, butterflies, beetles, and others -three separate body regions and six thoracic legs -ability to fly -two pairs of wings (outgrowths of the thoracic exoskeleton -tracheae conduct air |
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External Anatomy of a Grasshopper
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-Thorax is divided into the pro, meso, and meta, each having a pair of legs
+mouthparts are covered by a labrum, ect -10 abdominal segments, each with a spiracle or breathing pore. +The terminal abdominal segment bears the reproductive genitalia +males-blunt +females-ovipositor |
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