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Scientia Silvae Sinicae ›› 2021, Vol. 57 ›› Issue (8): 112-120.doi: 10.11707/j.1001-7488.20210811

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Ultramorphology of Female Andricus moriokae (Hymenoptera: Cynipidae)

Shuang Xue1,2,Yuanchen Zhang1,2,Shanshan Gao1,2,Jingshun Wang1,2,*,Kunpeng Zhang1,2   

  1. 1. School of Biology and Food Engineering, Anyang Institute of Technology, Henan Province Anyang 455000
    2. Taihang Mountain Forest Pests Observation and Research Station of Henan Province Anyang 456550
  • Received:2020-10-19 Online:2021-08-25 Published:2021-09-30
  • Contact: Jingshun Wang

Abstract:

Objective: Andricus moriokae is an important pest that induces galls on oak. This study aimed to clarify the ultramorphology of the female A. moriokae, especially for the types, quantity, and distribution of sensilla on the compound eyes, mouthpart, antennae, legs and ovipositor. Method: The ultramorphology of female A. moriokae was observed under the scanning electron microscope. Result: It was found that the compound eyes of A. moriokae are composed of a number of ommatidia with conical sensilla. The antennae of female insects are composed of a scape, a pedicle and 11 flagellomeres. The scape is funne-shaped, and the pedicle is short and globular. The first three flagellomeres are long columnar, and the last one is a bullet-shaped. The rest flagellomeres are short columnar. There are 5 kinds of sensillum distributed on the antennae of the gall wasp, including sensilla trichodea, sensilla chaetica, sensilla basiconica, sensilla placodea and sensilla coeloconica, of which the number and distribution of sensilla trichodea are the most extensive. The sensilla placodea is particular in the flagellomeres 3-11, with long and wide shape and smooth surface. The mouthparts are developed with sensilla trichodea on the maxillary palps. The legs are fluted with sensilla chaetica and sensilla trichodea. The ovipositor bears sensilla trichodea, sensilla chaetica, sensilla basiconica, sensilla auricillica and sensilla volcanica. Conclusion: There are different types of sensilla distributed on the compound eyes, antennae, mouthpart, legs and ovipositor of the female of A. moriokae. The functions of all kinds of sensory organs are closely related to a series of physiological activities such as roosting, feeding and reproduction of A. moriokae. This study may provide a theoretical basis for the comprehensive control and utilization of A. moriokae.

Key words: Andricus moriokae, antennae, mouthpart, ovipositor, sensilla

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