Gerris (Gerris) costae fieberi Stichel, 1938

Berchi, Gavril Marius, Cianferoni, Fabio, Csabai, Zoltán, Damgaard, Jakob, Olosutean, Horea, Ilie, Daniela Minodora, Boda, Pál & Kment, Petr, 2018, Water striders (Heteroptera: Gerromorpha: Gerridae) of Romania with an update on the distribution of Gerris gibbifer and G. maculatus in southeastern Europe, Zootaxa 4433 (3), pp. 491-519 : 500-501

Gerris (Gerris) costae fieberi Stichel, 1938

Material examined. ROMANIA: Bihor County: Budureasa [stream], 46°40ʹ50ʺN 22°31ʹ02ʺE, 442 m a.s.l., 23.vi.2013, 1 ♀ (ma); Criștioru de Jos [stream], 46°26ʹ15ʺN 22°31ʹ02ʺE, 387 m a.s.l., 22.vi.2013, 4 ♂♂ (ma) 3 ♀♀ (ma); idem [stream], 46°26ʹN 22°31ʹE, 350 m a.s.l., 19.vi.2013, leg. F. Terzani, A . Bandinelli & S. Cortellessa, det. F. Cianferoni, 1 ♂ (ma) 2 ♀♀ (ma) ( MZUF) 1 ♂ (ma) 1 ♀ (ma) (CFC); Vârtop [pond], 46°31ʹ18ʺN 22°38ʹ54ʺE, 1432 m a.s.l., 22.ix.2005 , leg. & det. D.M. Ilie, 1 ♂ (ma) ( DISR). Bistrița-Năsăud County: Ghemeș [stream], 46°47ʹ10ʺN 24°25ʹ54ʺE, 345 m a.s.l., 13.vii.2014 , leg. & det. P. Boda, 1 ♀ (ma) (PBDH). Caraș-Severin County: Borlova [pond], 45°19ʹ59ʺN 22°27ʹ53ʺE, 977 m a.s.l., 23.x.2012, 5 ♂♂ (ma) 2 ♀♀ (ma); Grădinari [pond], 44°48ʹ55ʺN 21°44ʹ08ʺE, 598 m a.s.l., 17.vi.2017, 2 ♂♂ (ma) 4 ♀♀ (ma); Mehadia [stream], 44°54ʹ42ʺN 22°23ʹ18ʺE, 368 m a.s.l., 15.vii.2012, 1 ♀ (ma); Poiana Mărului [pond], 45°24ʹ09ʺN 22°32ʹ35ʺE, 641 m a.s.l., 24.x.2012, 5 ♂♂ (ma) 3 ♀♀ (ma); Rusca [pond], 45°08ʹ23ʺN 22°29ʹ37ʺE, 839 m a.s.l., 27.vi.2017, 1 ♂ (ma) 1 ♀ (ma); Semenic Mountains [stream], 45°11ʹ08ʺN 22°04ʹ58ʺE, 1366 m a.s.l., 26.iv.2014, 1 ♂ (ma) 1 ♀ (ma); idem [stream], 45°07ʹ34ʺN 22°02ʹ55ʺE, 1113 m a.s.l., 08.iv.2014, 1 ♀ (ma); Țarcu Mountains [pond], 45°18ʹ04ʺN 22°29ʹ57ʺE, 1457 m a.s.l., 23.x.2012, 3 ♂♂ (ma) 5 ♀♀ (ma); idem [glacial lake], 45°21ʹ51ʺN 22°40ʹ01ʺE, 1941 m a.s.l., 25.x.2012, 3 ♀♀ (ma) . Cluj County: Caps [stream], 46°36ʹ58ʺN 23°17ʹ56ʺE, 827 m a.s.l., 08.vii.2014, leg. & det. P. Boda, 1 ♂ (ma) ( PBDH) . Harghita County: Atid [stream], 46°27ʹ41ʺN 25°04ʹ42ʺE, 471 m a.s.l., 11.vii.2014 , leg. & det. P. Boda, 1 ♀ (ma) ( PBDH); Gheorgheni [swamp], 46°45ʹ02ʺN 25°41ʹ13ʺE, 919 m a.s.l., 05.v.2017, 1 ♂ (ma) 4 ♀♀ (ma) . Hunedoara County: Anineș [pond], 45°40ʹ33ʺN 23°15ʹ02ʺE, 1105 m a.s.l., 20.vii.2012 , leg. & det. H. Olosutean, 3 ♂♂ (ma) 3 ♀♀ (ma) ( HOSR); Bulzeștii de Jos [stream], 46°16ʹN 22°44ʹE, 375 m a.s.l., 14.vi.2013, leg. F. Terzani & A . Bandinelli, det. F. Cianferoni, 2 ♂♂ (ma) ( MZUF) 1 ♂ (ma) (CFC); Făerag [stream], 45°38ʹ45ʺN 23°08ʹ46ʺE, 766 m a.s.l., 17.vii.2012 , leg. & det. H. Olosutean, 1 ♀ (ma) ( HOSR); Merișor, 45°27ʹ22ʺN 23°13ʹ39ʺE, 593 m a.s.l., 19.viii.2010, 3 ♂♂ (ma) 2 ♀♀ (ma); Rișca [temporary puddle], 46°12ʹN 22°43ʹE, 270 m a.s.l., 19.vi.2013, leg. F. Terzani, A . Bandinelli & S. Cortellessa, det. F. Cianferoni, 1 ♂ (ma) ( MZUF); Sibișel ( Beriu ), vi.1950 , leg. I. Lepși, det. B. Kis, 3 ♀♀ (ma) (MGAB). Maramureș County: Baia Borșa [pond], 47°41ʹ00ʺN 24°47ʹ21ʺE, 881 m a.s.l., 03.v.2017, 1 ♂ (ma); idem [pond], 47°41ʹ10ʺN 24°47ʹ00ʺE, 858 m a.s.l., 03.v.2017, 3 ♂♂ (ma) 3 ♀♀ (ma); Borșa [pond], 47°38ʹ08ʺN 24°47ʹ05ʺE, 909 m a.s.l., 03.v.2017, 1 ♀ (ma); Cavnic [stream], 47°37ʹ35ʺN 23°48ʹ25ʺE, 506 m a.s.l., 01.v.2017, 2 ♂♂ (ma) 1 ♀ (ma); Gutâi Mountains [pond], 47°41ʹ52ʺN 23°48ʹ48ʺE, 1063 m a.s.l., 01.v.2017, 4 ♂♂ (ma) 4 ♀♀ (ma); idem [stream], 47°41ʹ49ʺN 23°47ʹ55ʺE, 1019 m a.s.l., 01.v.2017, 3 ♂♂ (ma) 2 ♀♀ (ma); idem [stream], 47°42ʹ10ʺN 23°49ʹ53ʺE, 1127 m a.s.l., 01.v.2017, 8 ♂♂ (ma) 3 ♀♀ (ma); Hoteni [pond], 47°45ʹ37ʺN 23°54ʹ12ʺE, 527 m a.s.l., 30.iv.2017, 2 ♂♂ (ma) 1 ♀ (ma); Moisei [pond], 47°37ʹ59ʺN 24°32ʹ45ʺE, 717 m a.s.l., 03.v.2017, 3 ♂♂ (ma) 5 ♀♀ (ma); Poienile de sub Munte [pond], 47°49ʹ10ʺN 24°30ʹ03ʺE, 629 m a.s.l., 02.v.2017, 5 ♂♂ (ma) 5 ♀♀ (ma); Rona de Sus [pond], 47°52ʹ02ʺN 24°05ʹ29ʺE, 410 m a.s.l., 30.iv.2017, 1 ♂ (ma) 1 ♀ (ma); Șesuri [swamp], 47°35ʹ47ʺN 24°57ʹ04ʺE, 1070 m a.s.l., 04.v.2017, 1 ♀ (ma) . Mehedinți County: Jupalnic (= Orșova ), 30.iii.1967, leg. St. Negru, det . B. Kis , 2 ♂♂ (ma) 2 ♀♀ (ma) ( MGAB); Șușița [stream], 44°43ʹ33ʺN 22°35ʹ51ʺE, 214 m a.s.l., 26.vii.2012, 2 ♂♂ (ma) 1 ♀ (ma) . Sibiu County: Brădeni [stream], 46°05ʹ21ʺN 24°50ʹ06ʺE, 480 m a.s.l., 06.viii.2011, 1 ♀ (ma); Șinca Nouă [stream], 45°42ʹ18ʺN 25°11ʹ57ʺE, 575 m a.s.l., 02.viii.2014, 2 ♂♂ (ma) 2 ♀♀ (ma) . Suceava County: Brodina de Jos [channel], 47°48ʹ56ʺN 25°23ʹ47ʺE, 674 m a.s.l., 05.v.2017, 3 ♀♀ (ma); Chiril [pond], 47°24ʹ33ʺN 25°32ʹ23ʺE, 758 m a.s.l., 04.v.2017, 1 ♂ (ma) 2 ♀♀ (ma); Putna [pond near stream], 47°51ʹ52ʺN 25°37ʹ40ʺE, 570 m a.s.l., 05.v.2017, 2 ♂♂ (ma) 1 ♀ (ma); Sadova [pond], 47°35ʹ14ʺN 25°31ʹ33ʺE, 923 m a.s.l., 04.v.2017, 2 ♀♀ (ma); Sucevița [pond near stream], 47°45ʹ50ʺN 25°39ʹ19ʺE, 686 m a.s.l., 04.v.2017, 3 ♂♂ (ma) 2 ♀♀ (ma); Vatra Moldoviței [channel], 47°38ʹ50ʺN 25°34ʹ06ʺE, 606 m a.s.l., 04.v.2017, 2 ♂♂ (ma) 1 ♀ (ma) . Timiș County: Luncanii de Jos [stream], 45°43ʹ28ʺN 22°18ʹ07ʺE, 416 m a.s.l., 05.vii.2013, 1 ♀ (ma) . Vâlcea County: Romanii de Jos [stream], 45°08ʹ58ʺN 24°00ʹ52ʺE, 465 m a.s.l., 28.vii.2012, 1 ♂ (ma) 1 ♀ (ma).

Published records. Horváth (1897, 1898a), Montandon (1885), Szilády (1908), Sienkiewicz (1964), Benedek (1970), Bucșa (1970), Kis (1972, 1975, 1976), Schneider (1973, 1976), Kis & Davidescu (1994), Kecskés (1997, 1999), Ilie (2003, 2014), Davideanu et al. (2004), Olosutean & Ilie (2008b, 2010b, c, 2013b), Ilie & Olosutean (2009, 2012).

Remarks. In Romania, this species was identified at 47 sites at an elevational range of 214–1941 m a.s.l. ( Fig. 1 ). It was found from March to October in streams, channels, lakes, bogs and ponds. All the specimens examined were macropterous.

Status and interpretation of the subspecies (characters for separation are very ambiguous) of G. costae (Herrich-Schäffer, 1850) are questionable and their exact distribution patterns are not well understood (see Cianferoni 2011 for a bibliographic summary, cf. Damgaard 2006, Damgaard et al. 2014). It is bi- or multivoltine ( Largiàder et al. 1994, Damgaard 2006).

Distribution. West Palaearctic: from Italy to Balkan Peninsula, Ukraine, central and south European territory of Russia, European part of Kazakhstan, and from Egypt to Uzbekistan ( Andersen 1995, Saleh Ahmed & Gadalla 2005, Fent et al. 2011, Damgaard et al. 2014). For the Romanian distribution, see Fig. 6 .

Figures

FIGURE 1. Boxplots representing the elevational distribution of Gerridae in Romania. Circles represent outliers and asterisks represent extreme values.

FIGURES 2–7. Distribution in Romania: (2) Limnoporus rufoscutellatus (Latreille, 1807); (3) Aquarius najas (De Geer, 1773); (4) Aquarius paludum paludum (Fabricius, 1794); (5) Gerris argentatus Schummel, 1832; (6) Gerris costae fieberi Stichel, 1938; (7) Gerris lacustris (Linnaeus, 1758). Blank dots represent published records, question marks represent dubious published records of A. najas and solid dots represent records from this study.