Lichtenfels J R, Wergin W P
Biosystematic Parasitology Laboratory, Agricultural Research Service, U.S. Department of Agriculture, Beltsville, MD 20705-2350.
J Parasitol. 1994 Aug;80(4):620-4.
Prominent sublateral hypodermal chords (SHC) are described in Haemonchus spp. Four large SHC are located 1 muscle cell away from the lateral chords from the level of the middle of the esophagus to midbody. The SHC are largest in midbody and merge with the lateral chords at about 65% of the body length from the anterior end. With the aid of transmission electron microscopy, a band of nerve tissue was located parallel and medial to the SHC. Haemonchus spp. and Mecistocirrus digitatus have SHC that are so large they can be identified in thick freehand midbody cross sections cut with a cataract knife. Because SHC have not been described in other Trichostrongylidae, their presence in members of the Haemonchinae may have value as a systematic character.
在血矛线虫属中描述了显著的亚外侧皮下索（SHC）。四条大的SHC从食管中部水平到虫体中部与外侧索相距1个肌细胞。SHC在虫体中部最大，并在距前端约65%体长处与外侧索融合。借助透射电子显微镜，在SHC的平行内侧定位到一条神经组织带。血矛线虫属和指状长圆线虫的SHC非常大，以至于在用白内障刀切割的粗制徒手虫体中部横切面上就能识别出来。由于在其他毛圆科中未描述过SHC，它们在血矛线虫亚科成员中的存在可能具有作为系统特征的价值。
