Parornix torquillella (Zeller, 1850)

blackthorn slender

Parornix torquillella: mine on Prunus spinosa

Prunus spinosa, Belgium, prov. Namur, Éprave © Jean-Yves Baugnée

Parornix torquillella: larva in opened mine

Prunus spinosa, België, prov. Namen, Couvin, Frasnes © Stéphane Claerebout

Parornix torquillella: larva

larva

Parornix torquillella: mine on Prunus spinosa

Prunus spinosa, Belgium, prov. Namur, Parc National de Furfooz © Stéphane Claerebout

Parornix torquillella: mine on Prunus spinosa

underside

Parornix torquillella: larva

larva

mine

The mine begins as a lower-surface epidermal gallery that widens into a blotch. Finally it becomes a small, only weakly inflated tentiform mine, quadrangular, or triangular when it lies in a vein axil. The lower epidermis is whitish, unfolded, and rather transparant. The leaf tissue is eaten op to the upper epidermis. Frass packed in a corner of the mine. The older larva leaves the mine, then lives free under a leaf tip or margin that has been folded downwards, or in a leaf that is rolled into a pod.

hostplants

Rosaceae, monophagous

Prunus cerasus, domestica & subsp. insititia, maritima, spinosa.

P. spinosa is the main host.

phenology

(Emmet ao, 1985a) mention the larvae from late July till September. The flight graphs of adult moths in the website microlepidoptera.nl show both for P. torquillella and P. finitimella two peaks in May and August. One may expect therefore to find torquillella well before late July.

BENELUX

BE recorded (Phegea, 2010).

NE recorded (Kuchlein & de Vos, 1999a; Microlepidoptera.nl, 2010).

LUX not recorded (Fauna Europaea, 2010).

distribution within Europe

Almost all Europe, missing in Spain and parts of the Balkan Peninsula (Fauna Europaea, 2010).

larva

Yellowish white/green; head light brown. Contrary to P. finitimella, living on the same host plant, the legs are not black, but yellowish green to pale brown (Emmet, 1982a; Emmet, Watkinson & Wilson, 1985a). They also state that there is a difference in the number of spots on the rear margin of the head (two, rather than four), but that seems to be variable.

pupa

Described by Patočka & Turčáni (2005a).

synonyms

Ornix torquillella.

references

Baldizzone (2004a), Bengtsson & Johansson (2011a), Biesenbaum (2010a), Buhr (1936a, 1964a), Buszko (1992b), Buszko & Beshkov (2004a), Deutschmann (2008a), Emmet (1982a), Emmet, Watkinson & Wilson (1985a), van Frankenhuyzen & Houtman (1972a), van Frankenhuyzen Houtman & Kabos (1982a), Hartig (1939a), Hering (1932g, 1957a), Huemer (1988a), Jaworski (2009a), Kasy (1983a), Kuchlein & Donner (1993a), Kuchlein & de Vos (1999a), Leutsch (2011a), Maček (1999a), Patočka & Turčáni (2005a), Plóciennik, Pawlikiewicz & Jaworski (2011a), De Prins & Steeman (2011a), Robbins (1991a), Skala & Zavřel (1945a), Sønderup (1949a), Szőcs (1977a, 1981a).

mod 9.vi.2018