Comparisons.—From E. umbrinus, E. dorsalis differs in: Dorsal stripes faint; skull smaller; base of baculum not noticeably expanded; general tone of upper parts grayer.
For comparisons with E. minimus and E. amoenus see the accounts of those species.
Fig. 2. Known occurrences and probable geographic distribution of Eutamias amoenus and Eutamias dorsalis in Wyoming. See figure 1 for explanation of symbols.
| 1. E. amoenus luteiventris | 2. E. dorsalis utahensis |
[ Eutamias dorsalis utahensis Merriam ]
Eutamias dorsalis utahensis Merriam, Proc. Biol. Soc. Washington, 11:210, July 1, 1897.
Type.—Male, adult, skull and skin, No. 186457 (NM); from Ogden, Weber County, Utah; obtained on October 9, 1888, by Vernon Bailey; original No. 289.
Diagnosis.—Size medium; dorsal stripes faint; baculum not noticeably widened at base.
Description.—Color pattern: Crown Pale Smoke Gray mixed with Cinnamon; upper facial stripe Fuscous; other facial stripes Sayal Brown mixed with Fuscous or Fuscous Black; anterior margin of ear Ochraceous-Tawny; posterior margin of ear and postauricular patch grayish white; median dorsal dark stripe Fuscous or black; other dorsal dark stripes black and mixed with gray, sometimes barely discernible; dorsal pair light stripes Smoke Gray; lateral pair of light stripes creamy white; rump and thighs Pale Smoke Gray mixed with Cinnamon; dorsal surface of tail Fuscous Black mixed with Tilleul Buff; underside of tail Cinnamon-Buff or Pinkish Buff, Fuscous Black around margin and Tilleul Buff around outermost edge; antipalmar and antiplantar surfaces of feet Cinnamon-Buff; underparts creamy white; sides Pinkish Cinnamon or Light Pinkish Cinnamon. Skull: Size medium; braincase well inflated; zygomata strong, moderately appressed to cranium. Baculum: Small; keel approximately 1⁄3 of length of tip.