Strickler T L
Am J Anat. 1978 Jul;152(3):419-31. doi: 10.1002/aja.1001520310.
The purpose of this paper is to describe in detail the shoulder myology of the La Plata River Dolphin, Pontoporia blainvillei, and to review the literature on cetacean shoulder myology. Three fetal and one adult animal were used for the collection of morphological information. Pontoporia is less specialized in its shoulder anatomy that most delphinid cetaceans, and shares several characteristics with some mysticetes. The omohyoid and anterior serratus anterior muscles are found in both Pontoporia and the mysticete Balaenoptera, but are absent in most delphinids. The pectoralis abdominalis and three rhomboideus divisions are found in Pontoporia and Kogia, but in only a few delphinid species described in the literature. It is suggested that these characteristics are associated with a generalized use of the forelimb in Pontoporia.
本文旨在详细描述拉普拉塔河海豚（Pontoporia blainvillei）的肩部肌肉组织，并综述有关鲸类肩部肌肉组织的文献。使用了三只胎儿和一只成年动物来收集形态学信息。与大多数海豚科鲸类相比，拉普拉塔河海豚的肩部解剖结构不太特化，并且与一些须鲸类有若干共同特征。拉普拉塔河海豚和须鲸类的长须鲸都有肩胛舌骨肌和前锯肌，但大多数海豚科动物没有。拉普拉塔河海豚和小抹香鲸有胸腹肌和三块菱形肌，但文献中仅描述了少数几种海豚科动物有这些肌肉。有人认为，这些特征与拉普拉塔河海豚前肢的广泛使用有关。
