. Bulletin of the Southern California Academy of Sciences. Science; Natural history; Natural history. Bull. So. Calif. Acad. Sci. 69(3-4): 182, 1970 AN UNUSUAL PINNA ANOMALY IN NEOTOMA LEPIDA The large pinnae of wood rats are frequently scarred or torn but to our knowledge, no congenital malformations have been reported. On July 15, 1968, at a location 5 mi. east of El Rosario, Baja California del Norte, Mexico, we captured a male Neotoma lepida with both pinnae split anterior to the mid-line in a proximal-distal direction, giving the animal an antlered appearance (see Figure 1). The right and
. Bulletin of the Southern California Academy of Sciences. Science; Natural history; Natural history. Bull. So. Calif. Acad. Sci. 69(3-4): 182, 1970 AN UNUSUAL PINNA ANOMALY IN NEOTOMA LEPIDA The large pinnae of wood rats are frequently scarred or torn but to our knowledge, no congenital malformations have been reported. On July 15, 1968, at a location 5 mi. east of El Rosario, Baja California del Norte, Mexico, we captured a male Neotoma lepida with both pinnae split anterior to the mid-line in a proximal-distal direction, giving the animal an antlered appearance (see Figure 1). The right and left anterior portions are symmetrical, as are the posterior. Close examina- tion of the margins of the "split" reveals no evidence of scar tissue and the symmetry of the pinnae precludes an accident as the cause of this anomaly. If this is a somatic mutation, it is interesting to speculate at what stage of development this occurred; certainly it must have been very early in embryonic development before the symmetry of the head was established. The possibility of a genetic mutation cannot be eliminated, but we have not observed this condition in any of the other woodrats from this area. We wish to acknowledge the aid of Miss Patricia Ley and Mr. Dennis Roberts in the field and Mr. Stan Williams for the photographic 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
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