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Species Account for Criomorphus williamsi

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Criomorphus williamsi  China, 1939
Auchenorrhyncha: Delphacidae

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Essex RDB: Listed

Records: 3
First Record: 1999
Latest Record: 2010

1992-on hectads: 3
Pre-1992 hectads: 0
Total hectads: 3
Additional Phenology Data


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Taxonomic group: leafhoppers and allies (Auchenorrhyncha) - Available county data   
see Auchenorrhyncha Recording Scheme website
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Essex Red Data List comment
National trend: None known

Species text
Criomorphus williamsi is a very local pale brown and blackish grass-feeding planthopper, usually found in damp places. It is widely distributed but local in southern England, and not recorded from the north. Kirby (1992) states that most of the records form a rather tight cluster centred on Buckinghamshire and Oxfordshire. When the Essex Red Data list was prepared there was a single record from Essex, from Bedfords Park in 1984. Most sites are in areas of slightly to moderately acid soils. Water tables in areas of damp grassland should be kept high. Open grassland should be managed so as to retain a good range of plant species and structural diversity. This is best achieved by moderate grazing. Grazing levels should be carefully monitored, to ensure that overgrazing does not occur (Kirby, op. cit.). References

Species text last edited on Tue Mar 20th 2007 by user 3


Broad Habitat Data (based on 1 records with habitat information)

no subhabitat data available

Structural Habitat Data (based on 1 records with structural habitat information)

Habitat Detail and Method (based on 3 records with habitat detail and method information)

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