Fa­mil­iar­ity breeds ac­cu­racy

Animal Scene - - AQUA BASICS -

The best way to dif­fer­en­ti­ate be­tween the Up­per and Lower Jaw Bichirs is to mem­o­rize them.

This is by no means an easy task be­cause of the num­ber of Polypterus species in ex­is­tence. The lone E. cal­abar­i­cus is a stand­alone species, so it is easy to take to mem­ory as an Up­per Jaw Bichir. But the Bichirs from the Polypterus genus are harder to re­call be­cause there are 15 de­scribed species and a host of un­de­scribed ones.

How­ever, I have de­vised a sim­ple sys­tem for this. Ever no­ticed that as a kid it was quite easy to count in mul­ti­ples of five? Whether play­ing hide and seek or recit­ing in Math class, count­ing by 5s was easy: 5, 10, 15, 20, 25…

To clas­sify which among the de­scribed Bichirs un­der the genus Polypterus be­long to the Up­per or Lower Jaw va­ri­ety, sim­ply rely on the first three mul­ti­ples 5, 10, and 15. There are 5 Lower Jaw Bichirs, 10 Up­per Jaw Bichirs and 15 De­scribed Bichirs.

Once again, don’t for­get the E. cal­abar­i­cus un­der the Er­peto­ichthys genus, which is an Up­per Jaw Bichir.

Newspapers in English

Newspapers from Philippines

© PressReader. All rights reserved.