we can see a lot of paleontological and biological gradual subspecies or variation in same time and a trends of morphologic evolution in specification to new species. Even the gradual forms are very further more than the main species or new different species.
Of course, any discussion in this regard and reseans of condition and why happen, In exchanges for this process, can disscus about the researches of this trend,and also giving more importance to intermediate species and the perhaps gradual evolutionary trends in speciation.
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