Investigating the presence of Emblemasoma Aldrich (Diptera : Sarcophagidae) as parasitoids of Neotibicen canicularis (Harris) (Hemiptera: Cicadidae) in Québec

Biologie de l'organisme
jeudi 19 déc. 09:30 AM (15 minutes)
Salle EFG

The dog-day cicada Neotibicen canicularis is common to the northern United States and Southern Canada. Males of this species produce sound with the contraction of their tymbal muscles and attract females through intraspecific mating calls. The Sarcophagid flies of the genus Emblemasoma are parasitoids of cicadas that have developed tympanal hearing specifically tuned to the cicada male calling song as a host-finding strategy. This parasitic behaviour is particularly well documented in southern Ontario and northern USA with E. auditrix and Say's cicada, Okanagana rimosa. In Quebec, there are two reported species of Emblemasoma: E. erro and E. albicoma. Very little is known of their biology, especially of E. albicoma who is suspected to parasitize the dog-day cicada. In order to assess whether this species is a parasitoid of N. canicularis, acoustic trapping was done and carcasses of the dog-day cicada were collected at the Montreal’s Botanical Garden. The distribution of E. erro or E. albicoma in Québec was also documented by visiting the local insect collections. Acoustic trapping did not yield any Emblemasoma species. Also, Sarcophagid larvae were obtained from cicada carcasses and kept until pupation. Emerged specimens were morphologically identified and DNA bar-coded as Helicobia rapax and Sarcophaga (Liosarcophaga) sarracenioides, (Diptera: Sarcophagidae). We will discuss these results, particularly those associated with H. rapax and further directions about this study will be updated.

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