Summary for Dicranopalpus ramosus sens. str. (Opiliones)

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National Distribution

 
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Chelicerae of female Copyright: Meg Skinner
Identification difficulty rating: 5
Name: Dicranopalpus ramosus sens. str.
Authority: (Simon, 1909)
Order: Arachnida: Opiliones
Family: incertae sedis

Records: 31
First Record: 1992
Latest Record: 2021

1992-on hectads: 18
Pre-1992 hectads: 0
Total hectads: 18

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About this species

Recorded altitude range
1m to 65m

Species text

Identifying to species level
Dicranopalpus ramosus was recorded as a single species until a paper was published in 2015 which detailed another species of the same genus, Dicranopalpus caudatus (Wijnhoven and Prieto, 2015). Recording Dicranopalpus ramosus as sensu stricto rather than sensu lato therefore requires microscopic examination of a number of features detailed in this paper.

Distribution
Dicranopalpus ramosus was first introduced to Britain in the 1970s (Davidson, 2019). This common species has since been recorded all over the UK and is thought to have a wide distribution. As these records need to be accompanied by a specimen, further verified records are needed to determine the true distribution of this species compared to D. caudatus.

Habitat and ecology
This species is usually found in summer to early autumn and has been recorded in a variety of habitats, including urban areas, grassland and hedgerows. It is more arboreal than the newly introduced Dicranopalpus larvatus and shows a distinct posture when resting, with its legs stretched out to either side. Many observations are made of this resting posture on walls, fence posts, tree trunks and vegetation.

Status
The status and distribution of this species has yet to be confirmed due to lack of verified records. It is likely that many unconfirmed sensu lato records are this commoner species and not D. caudatus but further data is needed.

Original author of profile: Meg Skinner

References
Davidson, M.B., 2019. The British harvestman (Opiliones) fauna: 50 years of biodiversity change, and an annotated checklist. Arachnology, 18(3), pp.213-222.
Wijnhoven, H. and Prieto, C.E., 2015. Dicranopalpus caudatus Dresco, 1948: Not a synonym of Dicranopalpus ramosus (Simon, 1909) but a valid species after all (Arachnida, Opiliones). Revista IbĂ©rica de AracnologĂ­a, 26, pp.25-34.  References

Adult Season

Adult Season Data (based on 22 records with adult season information)


Habitats

background methodology

Broad Habitat Data (based on 9 records with habitat information)

Broad subhabitat Data (based on 4 records with subhabitat information)

Structural Habitat Data (based on 15 records with structural habitat information)

Habitat Detail and Method (based on 21 records with habitat detail and method information)

Recorded management for locations with Dicranopalpus ramosus sens. str.

Recorded substrate and hydrology for locations with Dicranopalpus ramosus sens. str.

Images

Chelicerae with dark markings
Chelicerae with dark markings
D. ramosus
D. ramosus
D. ramosus with longitudinal stripe
D. ramosus with longitudinal stripe
Pedipalp
Pedipalp
Femoral apophysis on pedipalp
Femoral apophysis on pedipalp
Penis showing downward-angled stylus
Penis showing downward-angled stylus
Chelicerae of female
Chelicerae of female
Ventral view
Ventral view
Dorsal view
Dorsal view
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