Aquarius paludum paludum Fabricius, 1794

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 : 495-497

Aquarius paludum paludum Fabricius, 1794

Material examined. ROMANIA: Alba County: Bubești [stream], 46°29ʹ33ʺN 22°42ʹ34ʺE, 1003 m a.s.l., 07.vii.2014, leg. & det. P. Boda , 1 ♀ (ma) ( PBDH); Căpud [stream], 46°12ʹ17ʺN 23°43ʹ08ʺE, 231 m a.s.l., 09.vii.2014, leg. & det. P. Boda , 1 ♂ (br) 1 ♀ (br) (PBDH); Mihalț [stream], 46°10ʹ02ʺN 23°43ʹ01ʺE, 223 m a.s.l., 09.vii.2014, leg. & det. P. Boda, 1 ♂ (br) 1 ♀ (br) ( PBDH); Pănade [stream], 46°13ʹ26ʺN 23°57ʹ55ʺE, 248 m a.s.l., 09.vii.2014, leg. & det. P. Boda , 6 ♂♂ (br) 1 ♂ (ma) 1 ♀ (br) (PBDH). Arad County: Târnova [stream], 46°19ʹ06ʺN 21°48ʹ12ʺE, 130 m a.s.l., 22.vi.2013, 1 ♂ (br) 2 ♀♀ (br) . Bacău County: Oituz [pond], 46°17ʹ18ʺN 26°35ʹ23ʺE, 298 m a.s.l., 02.viii.2011, 1 ♂ (br) 1 ♂ (ma) 2 ♀♀ (ma) . Bihor County: Albiș [pond], 47°21ʹ51ʺN 22°14ʹ51ʺE, 140 m a.s.l., 05.v.2012, 1 ♂ (ma) 3 ♀♀ (ma); Ateaș [stream], 46°54ʹ15ʺN 21°38ʹ36ʺE, 92 m a.s.l., 04.v.2012, 1 ♀ (ma); Băile 1 Mai – Pețea [lake], 46°59ʹ50ʺN 22°00ʹ10ʺE, 163 m a.s.l., 05.v.2012, 5 ♂♂ (ma); Bolcaș [stream], 47°21ʹ24ʺN 22°13ʹ50ʺE, 125 m a.s.l., 05.v.2012, 1 ♀ (ma) . Bistrița-Năsăud County: Beclean [lake], 47°10ʹ32ʺN 24°13ʹ05ʺE, 252 m a.s.l., 09.viii.2013, leg. & det. D.M. Ilie , 1 ♂ (ma) 7 ♀♀ (ma) (DISR); idem [lake], 47°10ʹ30ʺN 24°13ʹ11ʺE, 252 m a.s.l., 11.viii.2013, leg. & det. D.M. Ilie, 1 ♂ (ma) ( DISR); Ciceu Giurgești [pond], 47°13ʹ52ʺN 24°00ʹ58ʺE, 335 m a.s.l., 09.viii.2011, 1 ♀ (br) . Botoșani County: Cișmea [stream], 47°46ʹ38ʺN 26°39ʹ20ʺE, 93 m a.s.l., 03.viii.2012, 1 ♂ (br) 1 ♀ (br); Dragalina [stream], 48°02ʹ36ʺN 26°27ʹ04ʺE, 149 m a.s.l., 03.viii.2012, 4 ♂♂ (ma) 3 ♀♀ (ma) . Brăila County: Spiru Haret [pond], 44°53ʹ31ʺN 27°44ʹ56ʺE, 12 m a.s.l., 01.viii.2012, 1 ♂ (ma) 1 ♀ (br) . Brașov County: Brașov ( Lacul Noua ), 01.v.1970, leg.?, det. B. Kis , 1 ♀ (ma) ( MGAB); Bunești [stream], 46°06ʹ27ʺN 25°06ʹ01ʺE, 513 m a.s.l., 05.viii.2011, 1 ♀ (ma) . Buzău County: Caragele [stream], 44°59ʹ12ʺN 27°02ʹ13ʺE, 52 m a.s.l., 31.vii.2012, 5 ♂♂ (br) 4 ♂♂ (ma) 3 ♀♀ (br) 2 ♀♀ (ma); Policiori [stream], 45°20ʹ40ʺN 26°39ʹ53ʺE, 235 m a.s.l., 04.viii.2011, 1 ♂ (br) 1 ♂ (ma) 1 ♀ (ma) . Caraș-Severin County: Bocșa [pond near stream], 45°21ʹ34ʺN 21°45ʹ10ʺE, 231 m a.s.l., 23.iv.2017, 1 ♂ (ma) 1 ♀ (ma); Crușovăț [pond], 44°59ʹ47ʺN 22°19ʹ51ʺE, 271 m a.s.l., 21.vii.2012, 1 ♂ (ma); Globurău [pond], 44°58ʹ54ʺN 22°21ʹ39ʺE, 283 m a.s.l., 12.viii.2011, 3 ♀♀ (br); Lăpușnicu Mare [stream], 44°54ʹ43ʺN 21°56ʹ04ʺE, 272 m a.s.l., 08.viii.2013, 1 ♀ (ma); Poiana Mărului [pond], 45°23ʹ02ʺN 22°34ʹ38ʺE, 807 m a.s.l., 24.x.2012, 1 ♀ (ma); Semenic Mountains [stream], 45°07ʹ34ʺN 22°02ʹ55ʺE, 1113 m a.s.l., 08.iv.2014, 1 ♀ (ma); Zorlențu Mare [stream], 45°26ʹ08ʺN 21°58ʹ07ʺE, 195 m a.s.l., 22.iv.2017, 1 ♀ (ma) . Cluj County: Țaga [stream], 46°56ʹ31ʺN 24°03ʹ26ʺE, 266 m a.s.l., 08.viii.2011, 1 ♂ (br) 1 ♂ (ma) 1 ♀ (ma) . Constanța County: Casian [stream], 44°28ʹ53ʺN 28°29ʹ42ʺE, 20 m a.s.l., 04.viii.2011, 3 ♂♂ (br) 1 ♀ (ma); Crucea [stream], 44°31ʹ12ʺN 28°14ʹ00ʺE, 49 m a.s.l., 07.viii.2015, 1 ♂ (br) 1 ♂ (ma) 1 ♀ (br); Negureni [stream], 44°06ʹ37ʺN 27°46ʹ06ʺE, 42 m a.s.l., 01.viii.2012, 1 ♂ (ma) 1 ♀ (ma) . Dâmbovița County: Ghimpați [stream], 44°40ʹ27ʺN 25°48ʹ46ʺE, 131 m a.s.l., 21.vii.2014, 2 ♂♂ (ma); Gura Foii [stream], 44°44ʹ48ʺN 25°17ʹ12ʺE, 191 m a.s.l., 30.vii.2012, 2 ♂♂ (br) 2 ♀♀ (br) 1 ♀ (ma); Mislea [stream], 44°50ʹ49ʺN 25°19ʹ28ʺE, 248 m a.s.l., 30.vii.2012, 1 ♂ (br) 1 ♂ (ma) 2 ♀♀ (ma) . Dolj County: Plopșor [stream], 44°15ʹ28ʺN 23°27ʹ12ʺE, 119 m a.s.l., 27.vii.2012, 2 ♂♂ (ma) 1 ♀ (br) 2 ♀♀ (ma); Vârtop [stream], 44°12ʹ28ʺN 23°18ʹ58ʺE, 141 m a.s.l., 27.vii.2012, 2 ♂♂ (ma) 1 ♀ (br) 2 ♀♀ (ma) . Galați County: Târgu Bujor [stream], 45°52ʹ33ʺN 27°54ʹ50ʺE, 35 m a.s.l., 01.viii.2012, 2 ♂♂ (br) 3 ♂♂ (ma) 2 ♀♀ (br) 5 ♀♀ (ma); Vameș [stream], 45°32ʹ47ʺN 27°41ʹ27ʺE, 11 m a.s.l., 03.viii.2011, 1 ♂ (ma) . Giurgiu County: Schitu [stream], 44°09ʹ32ʺN 25°50ʹ09ʺE, 61 m a.s.l., 20.vii.2014, 1 ♂ (ma) 1 ♀ (br) . Harghita County: Rugănești [stream], 46°18ʹ45ʺN 25°05ʹ20ʺE, 405 m a.s.l., 05.viii.2011, 2 ♀♀ (br) 2 ♀♀ (ma) . Iași County: Scobinți [stream], 47°24ʹ29ʺN 26°55ʹ40ʺE, 128 m a.s.l., 03.viii.2012, 2 ♀♀ (ma) . Maramureș County: Gutâi Mountains [pond], 47°41ʹ52ʺN 23°48ʹ48ʺE, 1063 m a.s.l., 01.v.2017, 1 ♂ (ma); idem [stream], 47°42ʹ10ʺN 23°49ʹ53ʺE, 1127 m a.s.l., 01.v.2017, 2 ♀♀ (ma) . Mehedinți County: Cerneți [stream], 44°38ʹ24ʺN 22°42ʹ07ʺE, 53 m a.s.l., 26.vii.2012, 2 ♂♂ (ma); Ciovârnășani [stream], 44°44ʹ50ʺN 22°52ʹ37ʺE, 188 m a.s.l., 21.viii.2011, 1 ♂ (br); Ilovița [stream], 44°44ʹ40ʺN 22°28ʹ24ʺE, 41 m a.s.l., 26.vii.2012, 1 ♂ (ma) 1 ♀ (ma); Orșova [stream], 44°44ʹ42ʺN 22°24ʹ02ʺE, 273 m a.s.l., 16.viii.2011, 2 ♂♂ (ma) 2 ♀♀ (br) 6 ♀♀ (ma); Pătulele [stream], 44°20ʹ59ʺN 22°46ʹ44ʺE, 71 m a.s.l., 26.vii.20 12 , 2 ♀♀ (ma). Mureș County: Coroisânmărtin [stream], 46°24ʹ25ʺN 24°36ʹ33ʺE, 316 m a.s.l., 10.vii.2014, leg. & det. P. Boda , 1 ♀ (br) (PBDH); Lechința [stream], 46°28ʹ17ʺN 24°13ʹ14ʺE, 278 m a.s.l., 10.vii.2014, leg. & det. P. Boda, 2 ♂♂ (br) 3 ♀♀ (br) ( PBDH); Luduș [stream], 46°29ʹ39ʺN 24°05ʹ36ʺE, 283 m a.s.l., 08.viii.2011, 1 ♂ (br) 1 ♂ (ma) 1 ♀ (br); Sântu [stream], 46°47ʹ29ʺN 24°38ʹ13ʺE, 375 m a.s.l., 29.iv.2017, 1 ♀ (ma); Vânători [stream], 46°14ʹ58ʺN 24°55ʹ52ʺE, 365 m a.s.l., 10.vii.2014, leg. & det. P. Boda , 1 ♀ (ma) (PBDH). Olt County: Dobrosloveni [stream], 44°10ʹ06ʺN 24°21ʹ31ʺE, 76 m a.s.l., 28.vii.2012, 1 ♂ (br) 2 ♂♂ (ma) 1 ♀ (br); Fălcoiu [stream], 44°13ʹ58ʺN 24°20ʹ22ʺE, 95 m a.s.l., 28.vii.2012, 2 ♂♂ (br) 1 ♂ (ma) 1 ♀ (br); Mirila [pond], 44°21ʹ37ʺN 24°11ʹ04ʺE, 134 m a.s.l., 27.vii.2012, 1 ♂ (ma) 2 ♀♀ (br) 1 ♀ (ma); Siliștioara [stream], 43°46ʹ17ʺN 24°32ʹ27ʺE, 36 m a.s.l., 28.vii.2012, 1 ♀ (ma); Studina [stream], 43°57ʹ46ʺN 24°25ʹ17ʺE, 81 m a.s.l., 28.vii.2012, 2 ♂♂ (br) 2 ♂♂ (ma) 2 ♀♀ (br) . Prahova County: Străoști [stream], 45°01ʹ51ʺN 26°13ʹ31ʺE, 136 m a.s.l., 30.vii.2012, 2 ♀♀ (br) . Satu Mare County: Drăgușeni [stream], 47°54ʹ51ʺN 23°04ʹ48ʺE, 132 m a.s.l., 26.vi.2013, 1 ♂ (ma) 1 ♀ (br) 1 ♀ (ma); Supur [stream], 47°27ʹ54ʺN 22°47ʹ42ʺE, 145 m a.s.l., 24.vi.2013, 1 ♀ (ma); Tășnad [stream], 47°32ʹ22ʺN 22°33ʹ51ʺE, 119 m a.s.l., 26.vi.2013, 1 ♂ (ma) . Sibiu County: Șeica Mică [stream], 46°02ʹ51ʺN 24°07ʹ05ʺE, 325 m a.s.l., 07.viii.2011, 1 ♂ (br) ; Sibiu [lake], 45°45ʹ45ʺN 24°07ʹ31ʺE, 445 m a.s.l., 10.x.2014, leg. & det. H. Olosutean , 1 ♂ (ma) 1 ♀ (ma) ( HOSR); Veștem [stream], 45°42ʹ25ʺN 24°14ʹ43ʺE, 382 m a.s.l., 06.viii.2012, 7 ♂♂ (ma) 4 ♀♀ (ma) . Suceava County: Dumbrăveni [stream], 47°20ʹ54ʺN 26°08ʹ10ʺE, 486 m a.s.l., 04.viii.2012, 1 ♂ (ma); Putna [pond near stream], 47°51ʹ52ʺN 25°37ʹ40ʺE, 570 m a.s.l., 05.v.2017, 2 ♂♂ (ma) 1 ♀ (ma); Sucevița [pond near stream], 47°45ʹ50ʺN 25°39ʹ19ʺE, 686 m a.s.l., 04.v.2017, 1 ♂ (ma) 3 ♀♀ (ma); Vatra Moldoviței [channel], 47°38ʹ50ʺN 25°34ʹ06ʺE, 606 m a.s.l., 04.v.2017, 1 ♀ (ma) . Teleorman County: Turnu Măgurele [stream], 43°44ʹ40ʺN 24°49ʹ39ʺE, 27 m a.s.l., 29.vii.2012, 1 ♂ (br) 1 ♂ (ma) 1 ♀ (br) . Timiș County: Albina [stream], 45°41ʹ28ʺN 21°23ʹ27ʺE, 91 m a.s.l., 08.viii.2015, 1 ♂ (br); Brestovăț [stream], 45°51ʹ52ʺN 21°40ʹ05ʺE, 129 m a.s.l., 04.vii.2013, 1 ♀ (br); Gătaia [stream], 45°25ʹ58ʺN 21°26ʹ24ʺE, 111 m a.s.l., 23.iv.2017, 2 ♀♀ (ma); Moravița [stream], 45°15ʹ05ʺN 21°15ʹ57ʺE, 79 m a.s.l., 12.v.2012, 3 ♂♂ (ma); Timișoara [stream], 45°45ʹ17ʺN 21°16ʹ36ʺE, 101 m a.s.l., 23.iv.2013, 1 ♀ (ma); Victor Vlad Delamarina [stream], 45°38ʹ16ʺN 21°54ʹ06ʺE, 134 m a.s.l., 22.iv.2017, 2 ♂♂ (ma) 2 ♀♀ (ma) . Tulcea County: Rahman [stream], 44°47ʹ50ʺN 28°16ʹ24ʺE, 86 m a.s.l., 06.viii.2015, 1 ♂ (ma); Sulina [channel], 45°07ʹ24ʺN 29°36ʹ00ʺE, 1 m a.s.l., 10.viii.2013, leg. & det. H. Olosutean , 5 ♂♂ (ma) 1 ♀ (ma) ( HOSR); Vadu [channel], 44°32ʹ56ʺN 28°53ʹ02ʺE, 1 m a.s.l., 06.ix.2016, leg. & det. H. Olosutean , 3 ♂♂ (ma) 5 ♀♀ (ma) (HOSR). Vâlcea County: Marcea [stream], 44°55ʹ05ʺN 24°14ʹ17ʺE, 186 m a.s.l., 27.vii.2012, 1 ♂ (br) 3 ♂♂ (ma) 5 ♀♀ (ma) . Vaslui County: Puiești [stream], 46°25ʹ03ʺN 27°30ʹ31ʺE, 107 m a.s.l., 03.viii.2011, 1 ♂ (ma) 1 ♀ (br); Simila [stream], 46°15ʹ45ʺN 27°42ʹ23ʺE, 72 m a.s.l., 02.viii.2012, 7 ♂♂ (ma) 9 ♀♀ (ma).

Published records. Mayr (1853, as Hydrometra paludum ), Horváth (1878), Kertész (1890, 1901), Simonkai (1893), Montandon (1907), Benedek (1970), Bucșa (1970), Schneider (1973), Kis (1975, 1976), Kis & Davidescu (1994), Kecskés (1997, 1999), Ilie & Davideanu (2002), Ilie (2003, 2005, 2007, 2014), Davideanu et al. (2004), Ilie & Vițchii (2007), Olosutean & Ilie (2007, 2008a, b, 2010a, c), Ilie & Olosutean (2009, 2012), Berchi et al. (2011), Berchi & Chimișliu (2015), Olosutean (2015).

Remarks. In Romania, it was identified at 82 sites at an elevational range of 1–1127 m a.s.l. ( Fig. 1 ). It was found from April to October in streams, channels, lakes and ponds. The brachypterous/macropterous ratio was: 0.31: 0.69 (total 83/188).

Aquarius paludum paludum is a regular inhabitant of both lentic and slow flowing lotic habitats, and it often can be seen skating far away from the shore. We also found it inhabiting hilly and mountainous fast flowing streams. In Finland, it is bivoltine and known to be alary dimorphic during the summer, with the overwintering generation long-winged ( Vepsäläinen 1974a), which accords with our findings. Various interesting aspects on morphology, behavior and life history traits have been recently addressed by Harada et al. (2004, 2011), Harada & Nishimoto (2007), Perez Goodwyn et al. (2009), Ditrich & Koštál (2011), and Ditrich & Papáček (2016).

Distribution. Widely distributed across most of the Palaearctic Region, but absent from northern Africa ( Andersen 1995, Damgaard & Zettel 2003, Fent et al. 2011, Damgaard et al. 2014). For the Romanian distribution, see Fig. 4 .

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.