The National Red List Project

UKJNCC - Ttabidus2022 | Trachelus tabidus

Assessment ID
Ttabidus2022
Taxon name
Trachelus tabidus
Fabricius, 1775
Uploaded by
JNCC
Taxonomic information
Scientific name
Trachelus tabidus
Fabricius, 1775
Common name(s)
Black Wheat Stem-sawfly
Assessed taxon level
Species
Higher level taxonomic groupings
Invertebrates
Insects
Kingdom
Animalia
Phylum
arthropoda
Class
insecta
Order
hymenoptera
Family
cephidae
Genus
Trachelus
Species
tabidus
Species authority
Fabricius, 1775
National taxonomy system
UKSI
Unique national taxonomic ID
NHMSYS0020482520
Location and scope
Specific locality or subnational name or regional name
Great Britain
Scope (of the Assessment)
National
Countries included within the scope of the assessment
United Kingdom of Great Britain and Northern Ireland (the)
Country ISO code(s)
GB-SCT
GB-ENG
GB-WLS
Does the assessment cover a marine EEZ area(s)?
Not assigned
Conservation Status
Assessed as
Regionally Extinct
Abbreviated status
RE
Criteria system used
IUCN

(see Assessment details)

Assessment rationale/justification
Older records are widespread, but come to an abrupt halt in 1959 (a 2017 record was confirmed as erroneous). Benson (1951) notes as 'common in the fens' and says the larvae are a 'well-known pest of wheat, barley, rye and various wild grasses'. There seems to have been a catastrophic decline, apparently to complete loss. Whilst dedicated effort has not been put into searching for this species it seems highly unlikely that it would be entirely overlooked were it still present. Could pesticides have been particularly effective against this species? A status of Regionally Extinct has been assigned.
Assessment details
Year assessed
2022
Assessors/contributors/reviewers listed
Andy Musgrove
Criteria system used
IUCN
Reference for methods given
IUCN (2012) IUCN Red List Categories and Criteria. Version 3.1. 2nd Edition, IUCN Species Survival Commission. IUCN, Gland, Switzerland & Cambridge, UK plus regional guidelines v.542
URL (link) of redlist assessment or publication
https://www.sawflies.org.uk/wp-content/uploads/2022/10/Sawfly-Review-Phase-1-FINAL.pdf
Further information
Endemism (according to assessment)
Endemic to region
Not assigned
Habitat and systems
Ecological system type
Terrestrial
Yes
Freshwater
No
Marine
No
Publication
A review of the status of the sawflies of Great Britain Phase 1: Families other than the Tenthredinidae
Musgrove, A.J. 2022. A review of the status of sawflies of Great Britain - Phase 1: families other than Tenthredinidae. Natural England.