Biology
(
Anglèis
)
fornì da Arkive
The adults are believed to be wingless in Britain (4). The life cycle of this beetle takes one year to complete; breeding is thought to occur in summer, and immature adults overwinter in clumps of tufted hair-grass (Deschampsia cespitosa) (4). Both the adults and the larvae prey upon small invertebrates (4).
Conservation
(
Anglèis
)
fornì da Arkive
This ground beetle is included in English Nature's Species Recovery Programme, and is a priority species under the UK Biodiversity Action Plan (UK BAP). The Species Action Plan that has been produced to guide the conservation of this beetle aims to maintain its current range (4). A number of sites currently supporting this species are either Sites of Special Scientific Interest (SSSIs) or National Nature Reserves (NNRs); they are therefore afforded a level of protection (4). It has been suggested that management for this species should aim to maintain high water tables, and protect water bodies from pollution (5).
Description
(
Anglèis
)
fornì da Arkive
Ground beetles belonging to the genus Dromius are typically elongate, flattened beetles (2). Dromius sigma has a black head (2), and pale brown wing cases (elytra) that have a dark 'maltese cross' pattern (1).
Habitat
(
Anglèis
)
fornì da Arkive
Inhabits muddy and peaty soils close to standing water in fens, marshes, and flooded gravel pits or quarries (4). It is found on soft mud or soil close to the water margin, typically in lush vegetation such as clumps of tall grass (5).
Range
(
Anglèis
)
fornì da Arkive
Found in central and eastern England (4), but formerly had a very scattered distribution from Cumberland to south Hampshire (5). Most recent records are from Yorkshire (6).
Status
(
Anglèis
)
fornì da Arkive
Classified as Vulnerable in Great Britain (3)
Threats
(
Anglèis
)
fornì da Arkive
Main threats are the drainage of wetlands for agriculture or development (5), as well as peat extraction for use in horticulture (4). Further threats are the infilling of gravel pits, tree growth on moorland, and lowered water tables due to water abstraction and river engineering works (5).
Philorhizus sigma
(
Anglèis
)
fornì da wikipedia EN
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Philorhizus sigma: Brief Summary
(
Anglèis
)
fornì da wikipedia EN
Philorhizus sigma is a species of brown coloured ground beetle in the Lebiinae subfamily that can be found in everywhere in Europe, except for Andorra, Croatia, Monaco, San Marino, Vatican City and European islands. It is also found in such Asian countries as Georgia and Israel.
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Dwarsvlekschorsloper
(
olandèis; flamand
)
fornì da wikipedia NL
Insecten De dwarsvlekschorsloper (Philorhizus sigma) is een keversoort uit de familie van de loopkevers (Carabidae).[1] De wetenschappelijke naam van de soort werd in 1790 gepubliceerd door Pietro Rossi.
Bronnen, noten en/of referenties Geplaatst op:
29-03-2013
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