Rhamphus oxyacanthae (Marsham, 1802)
Crataegus monogyna, Brummen: summermines
detail, in transparancy
Crataegus monogyna, Amsterdamsche Bosch: larva in the mine
Crataegus monogyna, Belgium, prov. East Flanders, Oudenaarde, bos t’Ename © Carina Van Steenwinkel: summer mines
Crataegus monogyna, Amsterdam, autumn mine
Crataegus monogyna, Belgium, prov. Antwerp, Mol © Carina Van Steenwinkel: autumn mines
Crategus spec., Belgium, prov. Luxembuorg, Durbuy, la vieille Briqueterie de Rome © Carina Van Steenwinkel: autumn mines
Mespilus germanica, Belgium, prov. East Flanders, Oudenaarde, bos t’Ename © Carina Van Steenwinkel
Prunus spinosa, Belgium, prov. Luxembourg, Resteigne © Jean-Yves Baugnée
Prunus spinosa, Belgium, prov. Luxembourg, Durbuy, la vieille Briqueterie de Rome © Carina Van Steenwinkel
mine
Usually a very small (but see below), pear-shaped, upper-surface blotch, most of it stuffed with reddish-brown frass. Often several mines in a leaf. Oviposition is already in May, but the larvae hatch late and initially develop very slowly; only against the end of summer the mines become apparent. The larvae remain the the mine: they hibernate in the fallen leaves (van Frankenhuyzen & Freriks, 1969c). The bright-coloured frass and their large number makes these mines very conspicuous in autumn, despite their small size. The weevils feed pinhole-sized windows in the leaf upperside (maturation feeding).
Mainly on hawthorn the mines take a quite different aspect in the autumn. Then they are comparatively large, full depth blotch mines with granular, black, dispersed frass.
hostplants
Rosaceae, oligophagous
Amelanchier; Chaenomeles; Cotoneaster; Crataegus monogyna; Cydonia oblonga; Malus sylvestris; Mespilus germanica; Prunus avium, cerasus, domestica subsp. insititia, spinosa; Pyrus communis; Sorbus.
Crataegus is is the most important hortplant.
phenology
Mines are found from mid August till November; very common.
BENELUX
BE recorded (Curculionidae.be, 2010).
NE recorded (Heijerman, 1993a).
LUX recorded (Ellis, Kautenbach).
distribution within Europe
Most of Europe, including the British Isles, possibly excluding the Iberian Peninsula and the Balkan (Fauna Europaea, 2007, Morris, 1993a).
larva
references
Ahr (1966a), Buhr (1964a), Drăghia (1968a), van Frankenhuyzen & Houtman (1972a), van Frankenhuyzen Houtman & Kabos (1982a), Haase (1942a), Hering (1925a, 1930a, 1932g, 1957a), Kleine (1924a/1925a), Maček (1999a), Morris (1982a, 1993a), Nowakowski (1954a), Rheinheimer & Hassler (2010a), Robbins (1991a), Sønderup (1949a), Tempère (1982a), Vorst (2010a), Zoerner (1969a, 1970a).