History of The Species
There are no known fossil nudans, so the phylogenetic evolution of the group from the comparison with other modern representatives of Rippenquallen tapped to be. In the traditional system, the Nuda form a class distinct from the Tentaculata, which all have at least rudimentary tentacles. This division, after provisional results of morphological and molecular studies, however, probably does not reflect the actual relationships within the ctenophores.
Although the scheme is still in the river and does not have an independent assessment of the available evidence, seems to be a family from the order Cydippida, Haeckelidae, in the closer relationship of Nuda species to belong neither Cydippida still Tentaculata would therefore cladistic taxa included not all offspring of their joint Vorfahrens and would therefore is not recognised as a valid taxon in modern schemes.
The monophyly of Nuda itself, is however widely accepted, due to the complete lack of tentacles, and the presence of macrocilia as a common secondary feature, or synapomorphy.
Read more about this topic: Nuda
Famous quotes containing the words history of, history and/or species:
“The history of the past is but one long struggle upward to equality.”
—Elizabeth Cady Stanton (1815–1902)
“If man is reduced to being nothing but a character in history, he has no other choice but to subside into the sound and fury of a completely irrational history or to endow history with the form of human reason.”
—Albert Camus (1913–1960)
“Thus all probable reasoning is nothing but a species of sensation. ‘Tis not solely in poetry and music, we must follow our taste and sentiment, but likewise in philosophy, When I am convinc’d of any principle, ‘tis only an idea which strikes more strongly upon me. When I give the preference to one set of arguments above another, I do nothing but decide from my feeling concerning the superiority of their influence.”
—David Hume (1711–1776)