Orchestes jota (Fabricius, 1787)

Coleoptera, Curculionidae

Orchestes jota: mine in Betula pubescens

Betula pubescens, Tilburg, Kaaistoep

Orchestes jota: mine in Betula pubescensOrchestes jota: mine in Betula pubescens

Betula pubescens, Tilburg, Kaaistoep

Orchestes jota mine on Myrica gale

Myrica gale, UK; © Rob Edmunds

Orchestes cf jota: mine on Populus nigra

Populus nigra, Hungary, Mosonmagyaróvár © László Érsek

Orchestes cf jota: mine on Populus nigra: frass patterm

frass pattern

Orchestes cf jota: mine on Populus nigra: larva

larve

mine

Oviposition in the midrib. From there a corridor enters the lamina which suddenly and strongly widens. According to Hering (1957a) this blotch part is situated against the leaf margin, and in the distal part of the leaf; this would separate this mine from the one by Tachyerges stigma. However, Scherf (1964a) writes that at least in Alnus, the two mines cannot be told apart. The larva finally pupates in a globular cocoon inside the mine. Because the mine is formed when the leaf already is fully developed mined leaves have a normal shape.

hostplants

Myricaceae, Betulaceae, narrowly polyphagous

Alnus glutinosa; Betula nana, pendula, pubescens; Myrica gale; ? Populus nigra.

In the UK exclusively on Myrica (Morris, 1993a).

phenology

Larvae in June-August (Scherf, 1964a); adults emerge end July (Reinheimer & Hassler, 2010a).

BENELUX

BE recorded (Curculionidae.be, 2010).

NE recorded (Heijerman, 1993a).

LUX not recorded (Fauna Europaea, 2007).

distribution within Europe

From the UK and France eastwards till Poland, Czechia and Italy (Fauna Europaea, 2007).

larva

imago

The adult emerges from the pupa while this still is within the cocoon.

synonyms

Rhynchaenus jota, R. iota (Fabricius, 1787).

notes

the identification of the mine on Populus nigra, illustrated above, is far from definite; it could also concern Tachyerges pseudostigma. However, it seems that the frass in Tachyerges species is more coarsely grained. In the older literature there are some obscure references to an occurrence of O. jota on poplar.

references

Bachmaier (1965a), Brakman (1966a), Heijerman (1993a), Hering (1930a,b, 1957a), Huber (1969a), Kollár & Hrubík (2009a), Michalska (1976a), le Monnier (2003a), Morris (1993a), Reinheimer & Hassler (2010a), Robbins (1991a), Scherf (1964a), Sønderup (1949a), Viramo (1962a), Vorst (2010a), Zoerner (1969a).

23/01/2017

pub 23.i.2017 · mod 6.viii.2017