(240ANung) Anurophorus unguiculus (Bagnall, 1940)

There has been some confusion in the literature regarding the identity of Anurophorus unguiculus. Steve Hopkin considered that the holotype of Anurophorus unguiculus in the NHML slide material (collected by Bagnall from Lindow Common on 19 July 1939) to be clearly a distinct species, easily separated from Anurophorus laricis by the empodium.  Goto named Anurophorus satchelli in 1950, but this is probably a junior synonym of Anurophorus unguiculus.

 

The head of the holotype of Anurophorus unguiculus is in poor condition and it is not possible to ascertain the number of ocelli (Bagnall did not mention this in his description). The empodial appendage reaches about 0.3 times the length of the claw on the foot of the first and second pair of legs, and 0.5 times the length of the claw on the third pair of legs (the empodial appendage is absent in Anurophorus laricis). Like Anurophorus laricis, the tibiotarsi of Anurophorus unguiculus possess tenant setae although these are only weakly clavate (in Bagnall's description of Anurophorus unguiculus, he reported that knobbed setae were absent). Several slides labelled 'satchelli' in the NHML slide collection are clearly Anurophorus unguiculus. The longest specimen of Anurophorus unguiculus seems to be 0.7 mm in length.
The Cornish record is from mine spoil at St. Agnes. Specimens have also been collected from Roudsea Wood, Rusland Moss and Stribers Moss in the same hectad as the type locality for Anurophorus satchelli. The Welsh record is from the bank of a stream in deciduous woodland near Aberystwyth (Miles 1998).

 

 

Fig. 1: Third pair of legs of Anurophorus unguiculus collected from Roudsea Wood in September 1962 by Peter Lawrence (labelled as Anurophorus satchelli on the slide). Note the prominent empodial appendage (e).

 
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