Trainer J E, Self J T, Richter K M
J Parasitol. 1975 Aug;61(4):753-8.
The cuticle of P. crotali is pro-arthropodan, composed of an epi-, exo-, and endocuticle. The exo- and endocuticles are separated by a 600-A intermediate cuticular zone. The epicuticle is homogeneous and varies from 100 to 350 A in thickness. The exocuticle varies from 2 to eight mu in thickness and is divided into superficial and deep exocuticular zones. The endocuticle is lamellate and varies from 8 to 30 mu in thickness. Lamellae result from ordered parabolic orientations of 40-A chitin fibrils. Underlying cells lack a basement membrane. Subcuticular muscle cells insert tonofibrils directly into the adjacent endocuticle. No apodemes or apophyses occur.
猪蝰的角质层为原节肢动物型，由上表皮、外表皮和内表皮组成。外表皮和内表皮由一个600埃的中间角质层区域分隔。上表皮均匀一致，厚度在100至350埃之间变化。外表皮厚度在2至8微米之间变化，分为浅外表皮层和深外表皮层。内表皮呈层状，厚度在8至30微米之间变化。薄片由40埃的几丁质原纤维有序的抛物线排列形成。其下的细胞缺乏基底膜。皮下肌细胞将张力原纤维直接插入相邻的内表皮。未出现内突或表皮突。
