(041/XLboe) Xenylla boerneri (Axelson, 1905)

Xenylla boerneri is widely-distributed and is probably present throughout our region. It is a small bluish grey species up to 0.7 mm in length. The eyes have 5+5 ocelli and the post-antennal organ (PAO) is absent. The ventral sides of abd3 and abd4 possess a strongly-reduced tenaculum and furca respectively (Fig. 1). These structures are difficult to see except in cleared specimens viewed at high magnification (X1000) under oil immersion. Records to date are from dry habitats, mostly moss on boulders or trees.

 

 

Map Xenylla boerneri
Furca and tenaculum of Xenylla boerneri

Figure 1: Furca and tenaculum of Xenylla boerneri collected from Boreat, Northants. in February 1968 by Harold Gough.

 

A lateral view of the furca of Xenylla boerneri

Figure 2. A lateral view of the furca of Xenylla boerneri (with 1 hair, just visible). This was collected in moss on a wall in Arncliff, Yorkshire Sep 2010 by Peter Shaw; the same moss held many Tetracanthella lichnidis.

 
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