Formulae on Animal Kingdom


 


1
Remembering the division of the animal kingdom (in order)
Kingdom, Phylum, Class, Order, Family, Genus, Species
King Paul Called Out For Gus and Sam



2
Urochordata is also called Tunicata since the adult body is enclosed within a leathery test or Tunic made of cellulose like Tunicin. Their feeding apparatus is called endostyle. They also show paedogenesis (=reproduction by larva). Notable Urochordates/Tunicates are sea squirt (Herdmania), Doliolum and Salpa. Cephalochordata have notochord extending from tail upto cephalic region. Nerve cord is tubular and hollow to notochord. Pharynx is surrounded by a large chamber called Atrium which opens to the outside by an aperture called Atriopore. Notable example is Branchiostoma (=Amphioxus)



   3
Gnathostomata are divisible into five classes: Pisces, Amphibia, Reptilia, Aves and Mammalia. The last four classes are put occasionally together in a group Tetrapoda. Reptilia, Aves and Mammalia collectively may be called Amniota since their embryo is surrounded development by a membrane called Amnion enclosing a private little 'pond' of amnionic fluid around the embryo. Pisces and Amphibia (also called Anamniota together) have mesonephric kidney whereas the Amniota have more efficient metanephric kidney.



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