. Bulletin. Science; Natural history; Natural history. SUBSPECIFIC STATUS OF ONYCHOMYS TORRIDUS CLARUS 117. 0 50 100 f 1 1 STATUTE MILES Fig. 1. Map ^howing sample populations used in this study. Dotted lines indicate currently rec- ognized boundaries of subspecies as given in Hall and Kelson (1959). See text for further explanation. Methods and Materials Characters.—Exteinal measurements were taken from specimen labels. Cra- nial measurements were taken, in millimeters, by Matson using a measuring mi- croscope similar to that described by Anderson (1968). Depth of the braincase was taken as d
. Bulletin. Science; Natural history; Natural history. SUBSPECIFIC STATUS OF ONYCHOMYS TORRIDUS CLARUS 117. 0 50 100 f 1 1 STATUTE MILES Fig. 1. Map ^howing sample populations used in this study. Dotted lines indicate currently rec- ognized boundaries of subspecies as given in Hall and Kelson (1959). See text for further explanation. Methods and Materials Characters.—Exteinal measurements were taken from specimen labels. Cra- nial measurements were taken, in millimeters, by Matson using a measuring mi- croscope similar to that described by Anderson (1968). Depth of the braincase was taken as described by Hooper (1952). The remaining cranial measurements are as described in Cockrum (1962). Two qualitative characters of the skull were examined. The development of ;i spine on the posterior margin of the bony palate was scored as described by \ an Cura and Hoffmeister (1966), as follows: (I) prominent spine; (2) a well developed convexity: (3) a slight convexity: (4) no spine or even concave. The other qual- itative character is the extension of the incisive foramen relative to a plane at the front of the first molars. Scoring was done as follows: incisive foramen ends ( I) in front of molars, (2) on line with molars. (.^) behind molars. Sample populations.—Specimens of Onychoinys torridiis (n = 304) were ex- amined from 78 localities within the ranges of O. I. clams. O. i. loni;icaiuhis. and (). I. pulcher. In most cases, because of small sample sizes, we pooled specimens from nearby localities as shown in Figure 1. I'hese pooled localities. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Southern California Academy of Sciences. Los Angeles, Calif. : The Academy
Size: 1689px × 1480px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, booksubjectnaturalhistory, booksubjectscience
