Term
| Arthropoda development (protostome or deuterostome) |
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Definition
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Term
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Definition
Phylum Arthropoda
Subphylum Crustacea
Class Malacostraca
Order Decapoda
Genus Cambarus (italics) |
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Term
| two external sections of crayfish |
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Definition
1. cephalothorax
2. abdomen |
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Term
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Definition
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Term
| From posterior to anterior, crayfish appendages are: |
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Definition
1. Uropods: biramous, with telson form strong tail fan that is used in backward swimming
2. Pleopods: swimmerets
3. Pereiopods: walking legs
- first pair are chelipeds with enlarged claws (chelae) used in defense
- other four pairs used in walking and food handling
4. Maxillipeds: contain endopodite and exopodite
- first maxilliped bears no gill
5. Maxillae: head appendages
6. Mandibles: pair of large jaws, slightly toothed (protopodites)
7. Antennae
8. Antennules |
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Term
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Definition
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Term
| Water flee (Daphnia) Classification |
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Definition
Phylum Arthropoda
Subphylum Crustacea
Class Branchiopoda
Order Diplostraca
Suborder Cladocera
Genus Daphnia (italics) |
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Term
| median ventral groove of Daphnia |
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Definition
| food particles are removed from water and collected here, passed forward to mouth parts where larger particles are ground up by mandibles |
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Term
| body of Daphnia consists of three main parts |
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Definition
1. head
2. thorax
3. post abdomen |
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Term
| function of antennules (Daphnia) |
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Definition
| bear chemical sense receptors are are primarily sensory in function |
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Term
| six mouth parts of Daphnia |
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Definition
1. labrum (upper lip)
2. mandibles (lower jaw) - 2 of them
3. maxillae - 2 of them
4. ventral median labium |
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Term
| where does digestion take place in Daphnia? |
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Definition
| mid-gut region, caeca secrete digestive enzymes |
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Term
| respiratory system of Daphnia |
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Definition
| no respiratory system, gas exchange occurs through body wall |
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Term
| Reproductive system of Daphnia |
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Definition
under favorable conditions: female lays thin-shelled diploid eggs which develop parthenogenetically
under adverse conditions: female lays thick-shelled haploid eggs which require fertilization by a male Daphnia |
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