The leaf and stem mines of British flies and other insects
 

(Coleoptera, Diptera, Hymenoptera and Lepidoptera)

by Brian Pitkin, Willem Ellis, Colin Plant and Rob Edmunds

N.B. Links to the latest version of 'Leafminers and plant galls of Europe' are being edited

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Heterarthrus vagans (Fallén, 1808)
[Tenthredinidae]

Alder sawfly


Tenthredo melanorrhoea Gmelin, 1790. [Unavailable]
Heterarthrus vagans (Fallén, 1808)
Hylotoma vagans Fallén, 1808
Phyllotoma vagans (Fallén, 1808)
Heterarthrus vagans vagans (Fallén, 1808)
Tenthredo amaura Klug, 1818
Tenthredo (Emphytus) amaura Klug, 1818
Phyllotoma vagans var. amaura (Klug, 1818)
Emphytus amaurus (Klug, 1818)
Emphytus (Phyllotoma) amaurus (Klug, 1818)
Phyllotoma melanopyga (Klug, 1818)
Tenthredo melanopyga Klug, 1818
Tenthredo (Emphytus) melanopyga Klug, 1818
Emphytus melanopygus (Klug, 1818)
Emphytus (Phyllotoma) melanopygus (Klug, 1818)
Phyllotoma vagans var. melanopygus Klug, 1818
Phyllotoma microcephala (Klug, 1818). [Unavailable]
Phyllotoma leucopoda Dahlbom, 1835
Phyllotoma vagans var. leucopoda Dahlbom, 1835
Phyllotoma melanopyga Healy, 1868. [Unavailable]
Phyllotoma kamtchatica Malaise, 1931 [not 1932]
Heterarthrus kamtchaticus (Malaise, 1931) [not 1932]
Heterarthrus vagans anatolicus Muche, 1983.


Leaf miner: A large, practically full depth brownish blotch, without an initial corridor. The mine begins somewhere on the leaf and expands in all directions, without having much consideration with even major veins. In this respect the mine differs from that of Fenusa dohrnii on the same host plant. Moreover, as a rule there is just one mine per leaf. The full grown larva makes a disc-shaped cocoon within its mine, with a diameter of about 7-9 mm. Unlike F. dohrnii the larva is rather vividly pigmented and can easily be observed without dissecting the mine. Like most sawflies the larva lies belly-up in its mine (Bladmineerders van Europa).

The mine is also illustrated in British leafminers.

Larva: The larvae of sawflies have a head capsule, chewing mouthparts with opposable mandibles, six thoracic legs and abdominal legs (although they may be reduced) (see examples).

The larva is illustrated in British leafminers and Bladmineerders van Europa.

Pupa: The pupae of sawflies have visible head appendages, wings and legs which lie in sheaths.

Adult: The adult is illustrated in ECatSym - Electronic World Catalog of Symphyta.

Hosts in Great Britain & Ireland:

Salicaceae        
Alnus cordata Italian Alder British Wild Flowers by John Somerville et al. British leafminers
Alnus cordata Italian Alder British Wild Flowers by John Somerville et al. Pitkin & Plant
Alnus glutinosa Alder British Wild Flowers by John Somerville et al. British leafminers
Alnus glutinosa Alder British Wild Flowers by John Somerville et al. Pitkin & Plant
Alnus incana Grey Alder British Wild Flowers by John Somerville et al. Pitkin & Plant

Hosts elsewhere:

Salicaceae        
Alnus cordata Italian Alder British Wild Flowers by John Somerville et al. Bladmineerders van Europa
Alnus glutinosa Alder British Wild Flowers by John Somerville et al. Bladmineerders van Europa
Alnus incana Grey Alder British Wild Flowers by John Somerville et al. Bladmineerders van Europa
Alnus minor     Bladmineerders van Europa
Alnus x spaethii     Bladmineerders van Europa

Time of year - larvae: Univoltine: autumn (British leafminers).

Time of year - adults: Currently unknown.

Comments: Full synonymy and references are listed in ECatSym - Electronic World Catalog of Symphyta.

Distribution in Great Britain & Ireland: Britain including Bedfordshire, Cheshire, Cumberland, East Kent, Herefordshire, Monmouthshire, North Wiltshire, Oxfordshire, South Lancaster, Surrey, Warwickshire, West Kent and West Suffolk (NBN Atlas).

Also recorded in the Republic of Ireland (van Achterberg in Fauna Europaea).

Distribution elsewhere: Widespread in continental Europe Austria, Belgium, Bulgaria, Corsica, Czech Republic, Danish mainland, Estonia, Finland, French mainland, Germany, Hungary, Italian mainland, Latvia, Luxembourg, Poland, Romania, Russia - Central, Slovakia, Spanish mainland, Sweden, Switzerland, The Netherlands and Ukraine (van Achterberg in Fauna Europaea).

NBN Atlas links to known host species:

Alnus cordata, Alnus glutinosa, Alnus incana

British and Irish Parasitoids in Britain and elsewhere:

Chalcidoidea  
Chrysocharis purpurea Bukowski, 1938 Eulophidae: Entedoninae
Ichneumonoidea  
Coloneura stylata Förster, 1862 Braconidae: Alysiinae
Shawiana catenator (Haliday, 1836) Braconidae: Exothecinae
Shawiana laevis (Thomson, 1892) Braconidae: Exothecinae
Dolophron pedella (Holmgren, 1860) Ichneumonidae: Campopleginae
Lathrolestes luteolator (Gravenhorst, 1829) Ichneumonidae: Euryproctinae
Scambus foliae (Cushman, 1938) Ichneumonidae: Pimplinae


External links: Search the internet:
Biodiversity Heritage Library
Bladmineerders van Europa
British leafminers
Encyclopedia of Life
Fauna Europaea
NBN Atlas
NHM UK Checklist
Find using Google
Find using Google Scholar
Find images using Google


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Last updated 23-Aug-2017  Brian Pitkin Top of page