Animal Kingdom Topic
Numerical Tricks
1. Identify patterns:
 Arthropoda has the maximum number of known species, followed by Mollusca and Chordata.
 Among classes, Actinopterygii has the maximum number of known species.
2. Round off numbers:
 Consider the following approximations:
 Phylum:
 Porifera ~ 8,500
 Cnidaria ~ 10,000
 Platyhelminthes ~ 20,000
 Annelida ~ 15,000
 Mollusca ~ 100,000
 Arthropoda ~ 1,100,000
 Echinoderm ~ 7,500
 Chordata ~ 55,000
 Phylum:
 Class:
 Mammalia ~ 5,500
 Aves ~ 9,500
 Reptilia ~ 8,700
 Amphibia ~ 6,500
 Actinopterygii ~ 30,000
 Sarcopterygii ~ 100
3. Visualize the data:

Bar Chart:
 Create a bar chart to visualize the number of known species in different phyla.
 This will help you compare the species richness of different phyla.

Pie Chart:
 Create a pie chart to visualize the proportion of known species in different classes within the Chordata phylum.
 This will help you understand the relative abundance of different classes within the Chordata phylum.
4. Use ratios and percentages:
 Calculate the percentage of known species in each phylum and class.
 Calculate the ratio of species in different classes within a phylum.
 Calculate the ratio of species in different phyla to the total number of known animal species.
5. Estimation and Approximation:
 The total number of known animal species is approximately 1.5 million, but this is an ongoing process and the number might be higher.
 Use estimation and approximation where more precision is not readily possible, like estimating the total number of insect species or the number of species yet to be discovered.