North-Western Palaearctic species of Pristiphora (Hymenoptera, Tenthredinidae)
Author
Prous, Marko
Author
Kramp, Katja
Author
Liston 1, Veli VikbergAndrew
text
Journal of Hymenoptera Research
2017
59
1
190
http://dx.doi.org/10.3897/jhr.59.12565
journal article
http://dx.doi.org/10.3897/jhr.59.12565
1314-2607-59-1
598C5BB321364D91B522FA14D8874A52
Pristiphora pusilla Malaise, 1921
Figs 18, 32, 201, 271
Pristiphora pusilla
Malaise, 1921: 11-12. Lectotype ♂ (NHRS-HEVA000004942; designated by
Prous et al. 2016
) in NHRS, examined. Type locality: Torne
Traesk
, Torne Lappmark, Sweden.
Pristiphora amaura
Lindqvist, 1955b: 43-45. Holotype ♀ (http://id.luomus.fi/GL.5205) in MZH, examined. Type locality: Kangasala, South
Haeme
, Finland.
Similar species.
Based on the external morphology, the most similar species are
P. albitibia
,
P. astragali
,
P. confusa
,
P. opaca
,
P. sootryeni
,
P. staudingeri
, and
P. subopaca
. The species is best distinguished through the structure of male penis valve (Figs 271) and female lancet (Fig. 201). In females, the lack of small spiny pectines (or dentes semicirculares) on the inner surface of the lancet, and weakly developed setae, distinguish it from other similar species. Male penis valves are asymmetric, the left one (Fig. 271) having a noticeably stronger dorsal depression in the middle of pseudoceps and a more strongly bent valvispina than the right one (Fig. 94 in
Prous et al. 2016
). The most similar penis valves are those of
P. subopaca
(Fig. 269), which have a less distinct dorsal depression in the middle of pseudoceps and a less strongly bent valvispina, but this difference is clear only when compared to the left penis valve of
P. pusilla
. Externally,
P. pusilla
can usually be distinguished from
P. subopaca
by having ventrally paler antennae (uniformly black in
P. subopaca
; Fig. 15), which is more evident in males (Fig. 18).
Genetic data.
Based on COI barcode sequences,
P. pusilla
belongs to the same BIN cluster (BOLD:AAG3568) as
P. aphantoneura
,
P. bifida
,
P. confusa
,
P. opaca
,
P. staudingeri
, and
P. subopaca
(Fig. 4). Maximum distance within the BIN is 3.33% and minimum between species distance is 0.00%. The nearest neighbour to BOLD:AAG3568, diverging by a minimum of 2.76%, is BOLD:AAQ2302 (
P. armata
and
P. leucopus
). Based on nuclear data, maximum within species divergence is 0.2% (based on seven specimens and TPI or both genes combined) and the nearest neighbour is 0.1% different (
P. confusa
or
P. subopaca
, only TPI).
Host plants.
Unknown.
Distribution and material examined.
Western Palaearctic. Specimens studied are from Finland, Norway, and Sweden.