Indra subspecies in Utah
The Southeastern Area
Next lets look at the kaibabensis
(purple) minori (magenta) regions of Utah and Arizona.
Papilio i. kaibabensis grades into
minori as one leaves the Kaibab Plateau and this
occurs relatively rapidly. In fact there is a sharp drop in frequency of
kaibabensis morphs as one leaves the Kaibab Plateau. I
have attempted to illustrate this change on the range map. However
P. i. kaibabensis phenotypes do extend well northward
into Utah, but they get quite rare. The following two photographs show specimens
from populations just north of the Kaibab Plateau in northern
|Echo Cliffs minori-like (top) and kaibabensis for comparison|
|A minori-like specimen from Lees Ferry with a wide hindwing postmedian band.|
By Moab (about 220 miles north of the Kaibab Plateau) only about 1 in 20 individuals is indistinguishable from kaibabensis (see next photo), however a good number of intermediate phenotpyes are still present.
|Moab kaibabensis-like specimen. Note the broad expanse of blue scales on the hind wings and lack of postmedian bands.|
By the north end of the Tavaputs Plateau in Utah, true kaibabensis morphs are gone.
There is an unusual situation at the Coconino Rim on the east flank of the Kaibab Plateau. Here there are minori-like morphs within 15 air miles of kaibabensis populations. I have tried to illustrate this on the range map. Of the 37 Coconino Rim specimens examined none are kaibabensis morphs and most show little or no influence from kaibabensis genes. In fact several specimens from the Coconino Rim have wider postmedian bands than typical minori from near the type locality in Colorado. An example of this is illustrated below.
|Coconino Rim wide-banded adult||Coconino Rim female (right) and kaibabensis female|
This is an interesting situation in that kaibabensis influence appears to spread very far northward into Utah, yet it is insignificant or appears to be nonexistent just 15 miles to the ESE at the edge of the Kaibab Plateau.
As a final note, minori specimens from southeastern Utah are significantly larger than those taken at Black Ridge Breaks (minori's type locality) in Colorado. When studying the LFPs in these two areas the reasons for the size differences become clearer. Lomatium eastwoodiae at Black Ridge Breaks is a very small plant when compared to L. parryi or Cymopterus terebinthinus var. petraeus in southeastern Utah. L. eastwoodiae also tends to dry up by mid Summer while L. parryi and C. terebinthinus var. petraeus are more persistent. These populations are apparently well adapted to their LFPs' morphologies and phenologies.