Cerodontha suturalis (Hendel, 1931)
on Bolboschoenus, Carex
Carex arenaria, Zandvoort
a single leaf
Upper-surface, interparenchymatous (therefore yellowish) corridor in the middle part of the leaf. The mine starts not far from the leaf tip, descends, and changes direction at least twice. Often in the end the corridor occupies the entire width of the leaf. Larva solitary. Frass in one big lump. Pupation inside the mine. The puparium is glued with frass to both the ceiling and the floor of the mine, parallel to the leaf nervature.
Cyperaceae monophagous ?
Larvae in June-August (Nowakowski, 1973a).
BE recorded (Scheirs, De Bruyn & von Tschirnhaus, 1996a).
NE recorded (Ellis: Zandvoort, 2002).
LUX not recorded (Fauna Europaea. 2007).
distribution within Europe
From the UK to Lithuania and Hungary; also in Bulgaria (Fauna Europaea. 2007).
Rear spiraculum with 3 elongated papillae; two of them are curved around the base of the spiraculum (Nowakowski, 1973a).
Shining chestnut brown with ventrally and dorsally a broad diffuse brown black length zone; intersegmental constrictions rather deep (Nowakowski, 1973a).
Member of the subgenus Dizygomyza (Nowakowski, 1973a).
Many references to Cerodontha morosa (Meigen), stemming from before the publication of Nowakowski’s monograph, refer in fact to C. suturalis.
Robbins (1991a) also mentions Carex paniculata and sylvatica as host plant. Also because Nowakowski finds a preference in suturalis for warm and dry situations, this does not seem to be very plausible. That, however, is contradicted by the fact that the species also lives on the helophyte Bolboschoenus maritimus, as was confirmed by Warrington.
The fly leaves the mine either through an elongated cut precisely in the leaf margin, or a J-shaped cut that connects to the leaf margin.
Černý (2001a, 2009a, 2010a, 2011a), Černý, Andrade, Gonçalves & von Tschirnhaus (2018a), Černý, Barták & Vaněk (2009a), Černý & Merz (2006a), Černý & Vála (1996a, 1999a, 2006a), Dursun, Civelek, Barták ao (2015a), Nowakowski (1973a), Ostrauskas, Pakalniškis & Taluntytė (2003a), Pakalniškis (1995a), Papp & Černý (2016a), Scheirs, De Bruyn & von Tschirnhaus (1996a), Robbins (1991a), Spencer (1971a, 1972a, 1976a), Vála & Rohacek (1983a), von Tschirnhaus (1999a), Warrington (2018c), Zlobin (1983b).