. Advances in herpetology and evolutionary biology : essays in honor of Ernest E. Williams. Williams, Ernest E. (Ernest Edward); Herpetology; Evolution. M. Rectus Abdominis of Lacertilians • Moody 197 ext4. mm pect ext obi. int obi abd med trn abd abd pyr Figure 1. Ventral view of the trunk musculature of Ameiva ameiva (Teiidae). Specimen is superficially dissected on the right with a window cut in the M. rec- tus abdominis, and deeply dissected on the left with portions of the M. obliquus abdominis externus and M. obi. abd. internus removed at different levels to reveal underlying layers. Abb
. Advances in herpetology and evolutionary biology : essays in honor of Ernest E. Williams. Williams, Ernest E. (Ernest Edward); Herpetology; Evolution. M. Rectus Abdominis of Lacertilians • Moody 197 ext4. mm pect ext obi. int obi abd med trn abd abd pyr Figure 1. Ventral view of the trunk musculature of Ameiva ameiva (Teiidae). Specimen is superficially dissected on the right with a window cut in the M. rec- tus abdominis, and deeply dissected on the left with portions of the M. obliquus abdominis externus and M. obi. abd. internus removed at different levels to reveal underlying layers. Abbreviations: abd lat, M. rectus abdominis lateralis; abd med, M. rectus abdominis medialis; abd pyr, M. rectus abdominis pyramidalis; ext obi, M. obliquus abdominis externus; int obi, M. obliquus abdominis internus; myocom, Myocommata; pect, M. pectoralis; trn abd, M. abdominis transversus. terms. These changes were probably the cause of Camp's misinterpretation of the anatomical arrangement and homology of the different parts of the M. rectus ab- dominis. For example, Maurer describes the transverse series of fibrous bundles as originating from the superficial layer of the M. rec. abd. medialis and attaching to the skin. Camp interprets these col- lectively as a distinct muscle, the M. rec. abd. superficialis medianus, and assigns the name M. rec. abd. profundus to the deeper fibers which do not connect with the skin and are not segmented. How- ever, Maurer (1896: 229) emphatically points out that these parts are not separ- able as distinct muscles: " . die aber kontinuirlich zusammenhangen," ("how- ever they are continuously adherent to each other," my translation). Camp may also have been easily con- fused by Maurer's (p. 206) description of Lacerta, which I translate as follows: In Lacerta the M. rectus abdominis extends from the pelvis to the neck region as the M. rec. abd. superficiaHs. It is comprised of two distinguish- able parts which I have refer
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Keywords: ., bookauthorharvarduniver, bookcentury1900, booksubjectherpetology
