Leuctra dalmoni Vinçon & Murányi 2007

Žiak, Matej & Krno, Il'ja, 2014, New And Interesting Records Of Plecoptera (Insecta) From Slovakia And Several Autecology Notes, Illiesia 10 (6), pp. 52-59 : 52-54

Leuctra dalmoni Vinçon & Murányi 2007

In the spring of 2008 we collected several larvae and adults of Leuctra dalmoni , a species recently described from France and seven other European nations, including two sites in Slovakia ( Vinçon & Murányi 2007). Our first Slovakian records are from Suchý potok basin in the western High Tatra Mountains. We found dark brown to black adults with short, thin pilosity and larvae with long setae on the mid-abdominal tergites; long larval abdominal setae were at least ¾ of the segment length and often longer than the segments which were otherwise bare ( Fig. 1 ). Before the description of L. dalmoni , the species was confused with L. pseudosignifera Aubert, 1954 and L. prima Kempny, 1899 ( Vinçon & Murányi 2007), but in comparison to larvae of these species, the larvae of L. dalmoni have shorter pilosity on the cerci. Larval cercal setae on segments 3-10 do not reach the base of the next cercal segment in L. dalmoni , whereas in larvae of L. prima and L. pseudosignifera these setae reach, or exceed, the length of the next segment. During the faunistic research in Slovakia over the years 2008-2010, we thought the center of occurrence for this species is in the High Tatra Mountains. Exceptionally, it was recorded from Slovak Paradise and Vepor’s Hills, and at present, it appears not only as an ordinary Tatra species, but also Slovak. In more recent data (yet unpublished) it is clear, that it commonly occurs in the upper Váh, Poprad and Dunajec, Ipel’, Hornád and Hnilec basins ( Fig. 2 ), but its distribution does not extend to the Pannonian ecoregion. Distribution of L. dalmoni is closely related to the occurrence of mountain hypsometric degree. It is a rheophilic species which strongly dominates in epirithral zones and partially in springs, and it seems to prefer second and third order streams. The species occurs in streams with cristallic and carbonate geological basins.

Material examined. Slovakia, High Tatra Mts, Suchý brook: 1. (N49°12´36.1´´ E019°36´50.7´´), 1117 m a.s.l., 15. V.2008, 18L, coll., leg. et det.M. Žiak ; 2. (N49°12´21.7´´ E019°35´46.4´´), 983 m a.s.l., 15. V.2008, 23L, 1♂, coll. leg et det. M. Žiak ; Slovakia, High Tatra Mts, Tichý brook: 1. (N49°12´34.6´´ E019°55´55.6´´), 1115 m a.s.l., 15. V.2008, 2 ♀,coll. I. Krno, leg et det. M. Žiak ; 2. (N49°12´35.3´´ E19°55´54.4´´), 1150 ma.s.l., 13. V.2009, 10L, coll., leg. et det. I. Krno ; 3. (N49°11´17.9´´ E19°54´82.3´´), 1037 m a.s.l., 13. V.2009, 1L, coll., leg. et det. I. Krno ; Slovakia, Higt Tatra Mts, Tomanov brook: 1. (N49°13´28.1´´ E19°55´55.2´´), 1336m a.s.l., 10. V.2009, 2 L, coll., leg. et det. I. Krno ; 2. (N49°13´15.7´´ E19°56´04.9´´), 1290m a.s.l., 10. V.2009, 5L, coll., leg. et det. I. Krno ; 3. (N49°13´17.5´´ E19°56´28.9´´), 1151m a.s.l., 10. V.2009, 12L, coll., leg. et det. I. Krno ; Slovakia, High Tatra Mts, Javorov brook: (N49°13´15.8´´ E19°56´07.7´´), 1290m a.s.l., 11. V.2009, 6L, coll., leg. et det. I. Krno ; Slovakia, High Tatra Mts, Veľký Šum: (N49°07´44´´ E20°06´62. 6´´), 1165m a.s.l., 11. V.2009, 3L, coll., leg. et det. I. Krno ; Slovakia, High Tatra Mts, Poprad river, (N49°07´21.8´´ E20°04´53.3´´), 1220m a.s.l., 09. V.2010, 12L, coll., leg. et det.I. Krno ; Slovakia, High Tatra Mts, Belá river: (N49°08´81.7´´ E19°54´65.8´´), 963m a.s.l., 18.III.2009, 1L, coll., leg. et det. I. Krno ; Slovakia, High Tatra Mts, Biely Váh river, N49°07´30.1´´ E20°00´93.2´), 1198 m a.s.l., 7L, coll., leg. et det. I. Krno ; Slovakia, High Tatra Mts, Velický brook: (N49°07´35.5´´ E20°10´44.3´´), 984 m a.s.l., 14. V.2009, 1L, coll., leg. et det. I. Krno ; Slovakia, High Tatra Mts, Slavkovský brook: (N49°07´96.4´´ E20°11´71.1´´), 1047m a.s.l., 2L, coll., leg. et det. I. Krno ; Slovakia, High Tatra Mts, Hromadná voda: (N49°07´36.5´´ E20°10´27.1´´), 1002m a.s.l., 14. V.2009, 4L, coll., leg. et det. I. Krno ; Slovakia, Slovenský raj, Kopanec: (N48°53´24.5´´ E20°18´47.0´´), 851m a.s.l., 22. V.2008, 1♀, coll. I. Krno, leg. et det. M. Žiak ; Slovakia, Ipeľ river: (48°36'14.74" 19°41'19.28"), 848m a.s.l., 14.IV.2008, 5L, coll et leg. M. Očadlík, det. M. Žiak .

L = larva

Figures

Fig. 1. Larva of Leuctra dalmoni: pilose medial tergites of larva in dorsal view (a), prothorax in dorsal view (b), cercal segment with setae in dorsal view (c, d): Slovakia

Fig. 2. Distribution of Leuctra dalmoni in Slovakia.