Table 1.

Datasets used in this study

S.No	Phylum	Class	Order	Species
1	Arthropoda	Insecta	Diptera	39
2	Arthropoda	Insecta	Hemiptera	8
3	Arthropoda	Insecta	Hymenoptera	13
4	Chordata	Aves	Galliformes	6
5	Chordata	Aves	Passeriformes	17
6	Chordata	Mammalia	Artiodactyla	16
7	Chordata	Mammalia	Carnivora	19
8	Chordata	Mammalia	Primates	24
9	Chordata	Mammalia	Rodentia	22
10	Chordata	Reptilia	Squamata	7
11	Chordata	Reptilia	Testudines	7
12	Magnoliophyta	Liliopsida	Poales	25
13	Magnoliophyta	Magnoliopsida	Brassicales	6
14	Magnoliophyta	Magnoliopsida	Fabales	6
15	Nematoda	Secernentea	Rhabditida	7
16	Other	Other	Other	138
Total number of species				360

We collected the UTR information of 360 species from the UTRdb and classified them into 16 phylogenetic groups on the basis of NCBI taxonomy