Lab 7 Assignment: Soil Arthropods

Guide to Common Soil Arthropods                                           Name: __________________________

PART I. Identification

Mites (Class Arachnida, Order Acari):                               Round Worms (Phylum Nematoda):

Mite                                                   Round Worm

 

Segmented Worms                                                               Leeches (Phylum Annelida, Class Hirundinea):

(Phylum Annelida, Class Oligochaeta):

Segmented Wrom                                                                        Leech

 

Snails, Slugs (Phylum Mollusca, Class Gastropoda):           Isopod (Phylum Crustacea, Order Isopoda):

Snail                                       Isopod

 

 

Centipedes (Phylum Uniramia, Class Chilopoda):                 Millipedes (Phylum Uniramia, Class Diplopoda):

                     

 

Insects (Phylum Arthropoda, Class Insecta)

Hymenoptera: Formicidae                                                                  Collembola

Ants                                                                                                          Springtails

 

                            

 

 

Coleoptera                                                                                                   Coleoptera

Beetles (grubs)                                                                                           Beetles (adults)

                                          

 

Additional, Morpho-species (draw and describe each of the “artificial” designations used in your data reporting):

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Data Collection

Collection Site Name TAXA/Morpho-species TALLY TOTALS

 

Part II. Soil Arthropods Study

  1. Report your results – major trends, morphological differences in guilds between samples, etc.

LINEAR TRANSECT:

 

 

 

 

 

 

 

 

 

 

DEPTH PROFILE:

 

 

 

 

 

 

 

 

 

  1. Discuss your results – why did the arthropod assemblages vary as they did in your samples?

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Part III. Identification

Create a Dichotomous Key for the organisms identified in your group samples: these are set up as couplets of two choices that are opposite. For example:

 

 

 

 

1A. Shape does not have discernible “sides” …                                                  …CIRCLE

1B. Shape has discernible sides …                                                                           … 2

 

2A. Sides of shape are all of equal length…                                                           …3

2B. Sides of shape are not all of equal length…                                                   …RECTANGLE

 

3A. Shape has three sides …                                                                                     …TRIANGLE

3B. Shape has four sides …                                                                                       …SQUARE

 

 

Select SIX of the soil organisms you identified in this lab and create a dichotomous key that can be used to identify them.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Key approved by: ___________________________________________________________

License

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Entomology 311 Lab Manual by Melissa Scherr is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License, except where otherwise noted.