Evolution__3rd_Edition

E. e. oregonensis
Ensatina eschscholtzii picta
E. e. xanthoptica
Eureka
Ensatinaeschscholtzii picta
E. e. oregonensis
E. e. platensis
E. e. xanthoptica
E. e. eschscholtzii
E. e. croceater
E. e. eschscholtzii
E. e. klauberi
Zone of Hybridization
Color gradation shows zones of intergradation of subspecies
C o a s t R a n g e s
San Francisco
Mt.
Shasta
Monterey
C a s c a d e
Sacramento
Ran g e
S a n J o a q u i n V a l l e y
C o a s t R a n g e s
Plate 1
Ring species of the salamander Ensatina in western USA. There is
one species (E. oregonensis) in the north, going up into Oregon
and Washington. It then divides in northern California and forms
a more or less continuous ring around the San Joaquin valley. The
salamanders vary in form from place to place and they have been
given a number of taxonomic names. Where the coastal and
inland sides of the ring meet in southern California they behave as
good species at some sites (black zone on the map) (Section 3.5,
p. 50). Reprinted, by permission of the publisher, from Stebbins
(1994).
Lake Tahoe
S i e r r a N e v a d a
Mono Lake
E. e. platensis
E. e. croceater
Mt. Whitney
Loa Angeles
San Diego
Mojave Desert
0 100
Salton Sea
miles
E. e. klauberi