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UKJNCC - Nbrischkei2024 | Nematus brischkei

Assessment ID
Nbrischkei2024
Taxon name
Nematus brischkei
Zaddach, 1876
Uploaded by
JNCC
Taxonomic information
Scientific name
Nematus brischkei
Zaddach, 1876
Assessed taxon level
Species
Higher level taxonomic groupings
Invertebrates
Insects
Kingdom
Animalia
Phylum
arthropoda
Class
insecta
Order
hymenoptera
Family
tenthredinidae
Genus
Nematus
Species
brischkei
Species authority
Zaddach, 1876
National taxonomy system
UKSI
Unique national taxonomic ID
NHMSYS0020481522
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
Vulnerable
Abbreviated status
VU
Qualifying criteria (if given)
D2
Criteria system used
IUCN

(see Assessment details)

Assessment rationale/justification
With no records since 1949, this species would have been considered Regionally Extinct, save for a confirmed record in 2023. Adjusting the end-year of the assessment for this species to take this into account, a status of Vulnerable is indicated under Criterion D2 on the basis of presence at a single known site, where it is plausible that a future threat could lead to the status changing to CR or RE in a short period of time. In addition, change over 10 years is not calculable for EOO so an assessment against Criterion A is not possible, whilst AOO has increased over the period. There is no information on population size for use in Criteria C or D1 nor any life history model to inform an assessment against Criterion E. Whilst the very small EOO and AOO might suggest CR under Criterion B and there is just one current location, there is no evidence of continung decline, fragmentation or population fluctuation.
Assessment details
Year assessed
2024
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.39
Further information
Endemism (according to assessment)
Endemic to region
No
Habitat and systems
Ecological system type
Terrestrial
Yes
Freshwater
No
Marine
No
Publication
Musgrove, A.J. 2024. A review of the status of sawflies of Great Britain - Phase 3: The Tenthredinidae (subfamily Nematinae). Natural England.