Mezitaxonové vztahy
druh
douglaska tisolistá
Pseudotsuga menziesii (Mirb.) Franco
Heterobasidion annosum (Fr.) Bref. - kořenovník vrstevnatý 
(Pseudotsuga menziesii - douglaska tisolistá)
(Pseudotsuga menziesii - douglaska tisolistá)
Dicentrus bluthneri LeConte, 1880 (Pseudotsuga menziesii - douglaska tisolistá)
Eburilla sericea (White, 1855) (Pseudotsuga menziesii - douglaska tisolistá)
Leptoglossus occidentalis Heidemann, 1910 - vroubenka americká (Pseudotsuga menziesii - douglaska tisolistá)
(Pseudotsuga menziesii - douglaska tisolistá)
Megasemum asperum (LeConte, 1854) (Pseudotsuga menziesii - douglaska tisolistá)
Opsimus quadrilineatus Mannerheim, 1843 (Pseudotsuga menziesii - douglaska tisolistá)
Poliaenus oregonus (LeConte, 1861) (Pseudotsuga menziesii - douglaska tisolistá)
Semanotus litigiosus (Casey, 1891) (Pseudotsuga menziesii - douglaska tisolistá)
Tetropium velutinum LeConte, 1869 (Pseudotsuga menziesii - douglaska tisolistá)
Ulochaetes leoninus LeConte, 1854 (Pseudotsuga menziesii - douglaska tisolistá)
spásač (pouze larva)