Jiang Chunyan, Caldara Roberto, Skuhrovec Jiri, Zhang Runzhi
Key Laboratory of Zoological Systematics and Evolution, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China Chinese Academy of Sciences Beijing China.
Center of Alpine Entomology, University of Milan, Milan, Italy University of Milan Milan Italy.
Zookeys. 2020 Oct 20;976:131-145. doi: 10.3897/zookeys.976.53930. eCollection 2020.
The mature larva of Rosenschoeld, 1838 is described and illustrated in detail for the first time. It is compared with those known from the same genus and other genera in the tribe Cionini and with those of the hypothesized sister tribe Mecinini in the Curculioninae. The larvae of have three distinctive diagnostic features: the reduced number of setae on the epicranium (only two or three and one or two ) and on the epipharyngeal lining (only two , two , and no ); i.e., distinctly fewer than the most frequent number of setae in weevils, and mandibles dentate or angulate internally near the base. If considered together with Suffrian, 1854, the other genus of Cionini with larvae studied in detail, it is preliminarily suggested that mature larvae of this tribe might be characterized by six main diagnostic features: (1) labial palpi one-segmented, (2) labral rods absent, (3) pedal areas swollen to form large lobes or prolegs, (4) mandible with sharp apical teeth, (5) reduced number of on frons, only one or two , and (6) reduced number of epipharyngeal setae (two or three and two or three , but no ). It was noticed that Reitter, 1904 from Japan, a very distinct species in the genus for some characters of the adult, also possesses distinctive characters in the larva which are uncommon among known cionines. New biological data on with the discovery of its host plant, (Scrophulariaceae), in central Asia are also reported.
首次对1838年的罗森肖尔德成熟幼虫进行了详细描述和绘图。将其与来自同一属以及象鼻虫科Cionini族其他属的已知幼虫进行了比较，并与象鼻虫亚科中假定的姐妹族Mecinini的幼虫进行了比较。该幼虫具有三个独特的诊断特征：额顶刚毛数量减少（仅两根或三根以及一根或两根）以及咽上衬里刚毛数量减少（仅两根、两根以及无）；即明显少于象鼻虫中最常见的刚毛数量，并且上颚在基部附近内部有齿或呈角状。如果与1854年详细研究过幼虫的Cionini族的另一个属——苏夫里安属一起考虑，初步表明该族成熟幼虫可能具有六个主要诊断特征：（1）唇须一节；（2）无唇杆；（3）足区肿胀形成大的叶或腹足；（4）上颚顶端有尖锐齿；（5）额部刚毛数量减少，仅一根或两根；（6）咽上刚毛数量减少（两根或三根以及两根或三根，但无）。注意到1904年来自日本的里特尔象鼻虫，在成虫的某些特征方面是该属中一个非常独特的物种，其幼虫也具有在已知的Cionini族中不常见的独特特征。还报告了有关在中亚发现其寄主植物玄参科的新生物学数据。
