The broadest classification of an organism is
the domain. The three domains that organisms can be classified into
include Archea, Bacteria, and Eukarya. The
Archaea are prokaryotic cells with cell walls that contain no
peptidoglycan. The Bacteria are also prokaryotic cells, but
their cells walls contain peptidoglycan. Dirofilaria immitis is
classified under Eukarya. Eukaryotes have more complex
eukaryotic cells. Not all eukaryotes have cell walls, but of those that
do, none contain peptidoglycan. The Eukarya are divided into
four kingdoms which include Protista, Fungi, Plantae, and Animalia
Organisms classified under Kingdom Animalia
are multicellular and are composed of eukaryotic cells. Cells lack cell
walls and are organized into tissues. Animals do not carry out
photosynthesis like plants, rather they are heterotrophic and get their
nutrients mostly through ingestion (Kaiser 2007).
Members of this phylum, which Dirofilaria
immitis fits into, have a straight line intestine with a posterior
anus. Their body cavity lacks mesodermal lining so they have a
pseudocoel (Nolan 2002).
Nematodes, also known as roundworms, get
their name because of their round shape. Members of this class have a
pseudocoelom, which means they lack mesodermal tissue. Nematodes are
also unsegmented, bilaterally symmetric, and have a tubular digestive
tract passing from the mouth to anus.
Dirofilaria immitis is put into the
order Spirurida because they possess characteristics such as two lips,
having arthropods as intermediate hosts, and having vertebrates as
definitive hosts (PHYLUM…).
Dirofilaria immitis is a member of
this family due to the main characteristics of lacking a buccal capsule,
and in the male worms the shape and size of spicules. Members of this
family are most commonly described as threadlike nematode helminms with
different sizes (Nematodes…).
This genus is made up of filarial nematodes.