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Oscinella trochanterata (Chloropidae)
Renko	#1 Posted on 06-04-2016 15:26
Member Location: North of France Posts: 2371 Joined: 08.10.13	Hello, A Chloropidae found in North of France, Clairmarais, the 09 june 2015, in Grass, in a mainly decidious Identified as Oscinella trochanterata by Dr. Michael von Tschirnhaus and Dr. John Deeming. Lots a Thanks to them ! Greetings, Thomas Renko attached the following image: [156.79Kb] Edited by Renko on 06-04-2016 16:19


Renko	#2 Posted on 06-04-2016 15:27
Member Location: North of France Posts: 2371 Joined: 08.10.13	2nd picture Renko attached the following image: [190.22Kb]


von Tschirnhaus	#3 Posted on 08-04-2016 17:37
Member Location: Bielefeld, Germany Posts: 431 Joined: 04.11.07	Oscinella trochanterata Collin, 1946, Chloropidae. One of the few monophagous Oscinella species with peculiar characters for a correct identification, A) published, here firstly recorded: A) all knees (tips of femora) bright yellow in a larger extent than the diameter of the distal end of femur, front- and mid-tibia bright yellow, trochanter of fore-leg yellow, [hidden in both images]; 5th tarsal segment of mid-leg distinctly longer and wider than the 3rd, 4th segment very short and deeply emarginate distally; wings distinctly exceeding the tip of abdomen and slightly „smoky“; ocellar triangle 3/4 or 4/5 the length of the frons. Arista with longer pubescence than in other species, 3rd antennal segment in lateral view slightly axe-shaped (not round) and with a sharp apical edge in its upper third and inside the base of the arista; all claws longer and stronger arcuated than in other European Oscinella species; between the last sternite and the male terminalia a distinct transverse unsclerotized flap pointing ventrally. Larvae feed gregariously inside the developing stem and inflorescence of the reed canary grass, Phalaroides (= Phalaris) arundinacea, [confirmed by my own rearing result]. The species shares its larval substrate with O. angularis Collin, 1946, an interesting example opposed to the „Rule of Competitive Displacement“. A record of Bromus as host grass should be confirmed.