Sigara (Subsigara) iactans Jansson, 1983

Berchi, Gavril Marius, Rădac, Ioan Alexandru, Boda, Pál & Kment, Petr, 2024, Water boatmen (Heteroptera: Nepomorpha: Corixidae) of Romania, Zootaxa 5555 (2), pp. 227-252 : 242-243

Sigara (Subsigara) iactans Jansson, 1983

( Figs. 23, 26 )

Material examined. ROMANIA: București: BucureȘti (=Bucharest), ex. coll. A.L. Montandon, coll. Horváth, det. Jaczewski (as S. falleni ), revid. P. Boda, 1 ♂ ( HNHM) . Brăila County: Brăila, 25.vii.1959, leg. Gozmány, det. P. Boda, 1 ♂ 1 ♀ ( HNHM) . Buzău County: Caragele [stream], 44.9866°N 27.0369°E, 52 m a.s.l., 31.vii.2012, 3 ♂♂ . Constanța County: Istria [brackish pools], 44.5631°N 28.733°E, 7 m a.s.l., 14.ix.2005, leg. J. Sychra, det. P. Kment, 2 ♂♂ 1 ♀ ( JSBC) ; Negureni [stream], 44.1103°N 27.7683°E, 42 m a.s.l., 01.viii.2012, 1 ♂ ; Ostrov [Danube River], 44.1158°N 27.3413°E, 14 m a.s.l., 11.vii.2022, 1 ♂ . Dolj County: Ciupercenii Noi [light trap], 43.8368°N 22.9276°E, 30 m a.s.l., 19.vi.2023, leg. C.O. Manci, 35 ♂♂ (females were not counted) ; Vârtop [channel], 44.2077°N 23.3161°E, 141 m a.s.l., 27.vii.2012, 4 ♂♂ . Galați County: Galați, 26.viii.1959, leg. Gozmány, det. P. Boda, 1 ♂ 4 ♀♀ ( HNHM) . Giurgiu County: Schitu [stream], 44.1588°N 25.8358°E, 61 m a.s.l., 20.vii.2014, 1 ♂ . Olt County: Dobrosloveni [stream], 44.1683°N 24.3586°E, 76 m a.s.l., 28.vii.2012, 1 ♂ ; SiliȘtioara [channel], 43.7714°N 24.5408°E, 36 m a.s.l., 28.vii.2012, 1 ♂ . Tulcea County: Carcaliu [pond], 45.1481°N 28.1744°E, 3 m a.s.l., 21.vii.2023, 12 ♂♂; Dunavățu de Sus [pond], 45.0054°N 29.2871°E, 1 m a.s.l. , 29.vi.2024, 1 ♂; Sarichioi [Razim Lake], 44.9271°N 28.8545°E, 2 m a.s.l. , 23.vii.2023, 2 ♂♂; Sfântu Gheorghe [channel], 44.9002°N 29.594°E , 0 m a.s.l., 25.vii.2023, 3 ♂♂; Somova [lake], 45.1787°N 28.6803°E, 2 m a.s.l. , 23.vii.2023, 2 ♂♂ 4 ♀♀; Tulcea , 26.vii.1959, leg. Gozmány, det. P. Boda, 2 ♂♂ 1 ♀ ( HNHM). Vaslui County: PuieȘti [lake], 46.4175°N 27.5086°E, 107 m a.s.l. , 03.viii.2011, 1 ♂. Vâlcea County: Marcea [stream], 44.9181°N 24.2381°E, 186 m a.s.l. , 27.vii.2012, 3 ♂♂.

Published records. Montandon (1907, as S. falleni ), Jaczewski (1934, as S. falleni with trapezoidal pala), Jansson (1983, holotype), Kis & Davidescu (1994), Davideanu (1999), Nicoară et al. (2009).

General distribution. The distribution of S. iactans is split into two distinct areas, one in central and northern central Europe, where its native status is uncertain, and the other in southeastern Europe, where it is certainly native ( Serbia, North Macedonia, Romania, Bulgaria, European part of Turkey, Moldova, Ukraine, southern European territories of Russia) ( Jansson 1986, 1995; Fent et al. 2011; Grandova 2013, 2014a; Shapovalov et al. 2018b; Stoianova 2018; Protić & Nadaždin 2019; Derjanschi & Chiriac 2020). In Romania, S. iactans seems to occur only in the eastern, southern and southeastern parts of the country ( Fig. 23 ).

Remarks. The records of S. falleni by Popescu-Gorj & Costea (1961) from Bălțile Oltinei (Constanța County), Kis (1972, 1976) from Caraorman and Smârdan (Tulcea County), and Schneider (1973) from Brăila (Brăila County) should all belong to S. iactans ; all these localities are in the extra-Carpathian area and were published before the description of this species.

The specimens of S. iactans reported from Transylvania by Ilie (2001, 2003, 2004, 2006, 2007, 2014), Ilie & Davideanu (2002), Ilie & Vițchii (2007), Olosutean & Ilie (2007, 2008a), Olosutean et al. (2009), Ilie & Ban-Calefariu (2010), and Ilie & Olosutean (2012) are suspected to be misidentifications and most probably belong to S. falleni . This material is no longer available for examination (Ilie, pers. comm.). The material published by Berchi et al. (2011) also no longer exists. However, to confirm the occurrence of S. iactans in the intra-Carpathian area (Transylvania), we sampled most of the localities listed in the above mentioned papers, as well as some additional ones, and found only S. falleni . A single male from a total of 152 specimens collected or revised from Transylvania had the shape of the pala intermediate between S. falleni and S. iactans (see Fig. 25 and the remarks under Sigara cf. falleni ). Because we have found no clear evidence of the occurrence of S. iactans in Transylvania, all suspected misidentifications of this taxon from the intra-Carpathian area were excluded from the distribution map.

These results confirm the distributional pattern for Sigara falleni and S. iactans in southeastern Europe as indicated by Jansson (1983, 1986). Our data show that the distributions of these two species do not overlap in Romania, unlike in central and northern Europe.

Sigara iactans was described by Jansson (1983) based on Montandon’s material from Comana, Giurgiu County, Romania.

Figures

FIGURES 22–28. (22–23) Distribution in Romania: (22) Sigara (Sigara) striata (Linnaeus, 1758); (23) Sigara (Subsigara) falleni (Fieber, 1848) (dots) and S. (Subsigara) iactans Jansson, 1983 (squares). (24–26) Shape of the male pala: (24) Triangular pala—S. (Subsigara) falleni (Romania:Sibiu county: Săcel); (25) Intermediate between triangular and trapezoidalpala (Romania: Harghita county: Sânpaul); (26) Trapezoidal pala—S. (Subsigara) iactans (Romania: Dolj county: Ciupercenii Noi). (27–28) Distribution in Romania: (27) Sigara (Subsigara) fossarum (Leach, 1817); (28) S. (Vermicorixa) lateralis (Leach, 1817). Blank shapes represent published records, solid shapes represent records from this study, and question mark in Fig. 23 indicates the location of the specimen with an intermediate shape of the pala [listed as Sigara (Subsigara) cf. falleni]. Palae not scaled.