There is evident variation in body size amongst Anthonomus santacruzi Hustache, 1924, weevils. The aims of this study were to assess if the variation in body size in A. santacruzi weevils is a result of sexual dimorphism and what features can be used to distinguish males from females. The weevils were collected from field sites in Mpumalanga, South Africa, where they were introduced as biocontrol agents of Solanum mauritianum Scopoli. Body structures and the presence/absence of the tergal notch was examined under an optical stereomicroscope and SEM to assess differences between sexes. The morphometric analysis of the body structures included rostrum length (base–apex and antennal insertion–apex), elytral length and width, pronotum length and width, first tarsus length, first tibia length, funiculus length and total body length. Rostrum length, elytra length and width and total body length were significantly larger in females than in males. A tergal notch in the 8th abdominal tergite was present in males and absent in females. The body structure; of rostrum length, elytra length and width and total body length overlapped between sexes in some specimens. The abdominal tergal notch was found to be the most useful body structure to distinguish males from females in A. santacruzi.

Anthonomus santacruzi Hustache, 1924, 象鼻虫的体型有明显差异。本研究的目的是评估A中体型的变化是否存在。santacruzi象鼻虫是两性异形的结果，哪些特征可以用来区分雄性和雌性。象鼻虫是从南非姆普马兰加的野外现场收集的，在那里它们被引入作为毛里求斯茄的生物防治剂斯科波利。在光学立体显微镜和 SEM 下检查身体结构和 tergal 缺口的存在/不存在以评估性别之间的差异。身体结构的形态测量分析包括喙长度（基部-顶点和触角插入-顶点）、鞘翅长度和宽度、前胸膜长度和宽度、第一跗骨长度、第一胫骨长度、绳索长度和全身长度。雌性的喙长、鞘翅长宽和全身总长明显大于雄性。第 8 腹部 tergite 的 tergal 缺口在雄性中存在，在雌性中不存在。车身结构；在一些标本中，两性之间的喙长、鞘翅长和宽以及体长的重叠。腹部 tergal 切迹被发现是区分男性和女性的最有用的身体结构一个。圣克鲁兹。