Hydrometra gracilenta Horváth, 1899

Cianferoni, Fabio, Dell’Olmo, Lorella & Lastrucci, Lorenzo, 2015, Review of Hydrometra gracilenta Horváth, 1899 (Hemiptera: Heteroptera: Hydrometridae) in Italy, with notes on its general distribution, Zootaxa 3980 (4), pp. 584-590 : 585-588

Hydrometra gracilenta Horváth, 1899

Hydrometra gracilenta Horváth, 1899 . Horváth (1899: 450, “ Austria: Goricia” [now Italy], one of the type localities); Tamanini (1946: 15; clipeus representation); Servadei (1967: 35); Tamanini (1979: 26, Italy, Alpine and pre-Alpine regions: “ Italia [...] regioni alpine e prealpine”; 1982: 75); Rizzotti Vlach and Zerbini (1989: 69); Andersen (1995: 84, “IT [= Italy]”); Faraci and Rizzotti Vlach (1995: 7, “N [=Northern Italy, Tuscany excluded]”); Bacchi and Rizzotti Vlach (1996: 44, 2005: CD-ROM, 2007: CD-ROM); Aukema et al. (2013: 33, “IT [= Italy] (Goricia)”; Aukema (2015, “Italian mainland”).

Hydrometra gracilentus Horváth, 1899 . Stichel (1955: 156, Italy: “ Italien ”, 1956: 162, Italy: “It. [= Italien]”); Tamanini (1989: 373, “ Italia settentrionale (Trentino—Alto Adige e Lombardia) ”.

PUBLISHED RECORDS. Lombardy: Merate (LC), Sartirana, Lago di Sartirana, [319 m], [45.716° N, 9.424° E], 1964, CLT (Tamanini 1982: “lago di Sartirana”; Rizzotti Vlach and Zerbini 1989: “Sartirana”; Bacchi and Rizzotti Vlach 2005, 2007: “LC / Madonna del Bosco, Santuario della- (LC) / Lago di Sartirana / Coll. Tamanini / 1964”); [? Castelnuovo Bocca d’Adda (LO)], Fiume Po [? 45.11° N, 9.87° E] (Tamanini 1982: “fiume Po a Castelbuono [sic]”); Mantova (MN), near Bagnolo San Vito (MN), Gradaro, near Chiavica Moro and Corte Barchessina, left bank of the Fiume Mincio and channels, 14 m, [45.06° N, 10.59° E], 1991, 1 ex. ( Bacchi and Rizzotti Vlach 1996: “Coord. UTM PQ496969, quota 14 m s.l.m., comune di Mantova, località in prossimità di Corte Barchessina [...] riva sinistra del Fiume Mincio [...] canali”; Bacchi and Rizzotti Vlach 2005, 2007: “MN / Gradaro, Chiávica Moro, Fiume Mincio / Bacchi, Rizzotti Vlach, 1996 / 1991”); Mantova (MN), Formigosa, ex clay pits, 14 m, [45.121° N 10.858° E], 1991-1992, CMR ( Bacchi and Rizzotti Vlach 1996: “Coord. UTM PQ457986, quota 14 s.l.m., comune di Mantova, località Formigosa [...] cave di argilla dismesse [1991]”, idem “[1992]”; Bacchi and Rizzotti Vlach 2005, 2007: “MN / Formigosa / Bacchi, Rizzotti Vlach, 1996 / 1991”, idem “/ 1992”,“MN / Formigosa, fiume Míncio / Coll. Rizzotti Vlach / 1991”); Ostiglia (MN), Palude del Busatello (or Palude di Ostiglia), [13 m], [northern part: 45.0962° N, 11.0979° E; southern part: 45.1132° N, 11.1013° E], 1982-1983 ( Rizzotti Vlach and Zerbini 1989: “[Palude del Busatello:] margine Nord della palude [...:] specchio d’acqua [... e] Margine Sud della palude [...:] porzione terminale del fiume Busatello [1982]”, idem “[1983]”; Bacchi and Rizzotti Vlach 2005, 2007: “MN / Ostíglia, Palude del Busatello / Rizzotti Vlach, Zerbini, 1989 / 1982”, idem “/ 1983”); Porto Mantovano (MN), Soave, left bank of the Fiume Mincio and channels, 18 m, [45.195° N 10.716° E], 1991-1992 ( Bacchi and Rizzotti Vlach 1996: “Coord. UTM PR336038, quota 18 m s.l.m., comune di Porto Mantovano, fraz. Soave. [...] palude [...] riva sinistra del Mincio [...] canali [1991]”, idem “[1992]”; Bacchi and Rizzotti Vlach 2005, 2007: “MN / Porto Mantovano, Soave / Bacchi, Rizzotti Vlach, 1996 / 1991, idem “/ 1992”, “MN / Porto Mantovano, Soave / Coll. Rizzotti Vlach / 1992);

Dubino (SO), Bocca d’Adda, [Riserva Naturale “Pian di Spagna e Lago di Mezzola”], [46.18° N, 9.43° E], 1986, MCMO ( Bacchi and Rizzotti Vlach 2005, 2007: “SO / Dubino, Oasi Novate, Bocca d'Adda / Coll. Mus. Civ. St. Nat. Morbegno (Sondrio) / 1986”); Travedona-Monate / Cadrezzate / Osmate / Comabbio (VA), Lago di Monate, [266 m], [45.79° N, 8.66° E], CLT (Tamanini 1982: “lago di Monate”; Rizzotti Vlach and Zerbini 1989: “Travedona”; Bacchi and Rizzotti Vlach, 2005, 2007: “VA / Monate, Lago di- / Lago di Monate / Coll. Tamanini / 1953”). Trentino-Alto Adige: Appiano sulla Strada del Vino (BZ), near Vadena (BZ), Lago di Monticolo, [490 m], [46.423° N, 11.290° E], VIII.1951, 1 ex. brach., CLT (Tamanini 1982: “Vadena, Lago di Monticolo, VIII.51, es. 1 br.”; Rizzotti Vlach and Zerbini 1989: “Appiano”; Bacchi and Rizzotti Vlach, 2005, 2007: “BZ / Vádena, Lago di Montícolo / Tamanini, 1982 / 1951” e “BZ / Lago di Montícolo / Coll. Tamanini / 1951”); Terlano (BZ), Settequerce, near Fiume Adige, [46.50° N, 11.26° E], 17.IV.1927, Hartig leg., 3 ex. brach., CLT ( Tamanini 1946: “Bolzano, Settequercie, 17/IV, l. [=legit] Hartig. (M. Tr. [=Museo St. Nat. Ven. Trid., Trento]) [...] f. a. [=forma attera]”; Tamanini 1982: “Settequerce, presso l’Adige, IV.27, es. 3 br. (1. Hartig, c. MT [=Museo Tridentino di Scienze Naturali, Trento])”; Rizzotti Vlach and Zerbini 1989: “Settequerce”; Bacchi and Rizzotti Vlach 2005, 2007: “BZ / Settequerce / Coll. Tamanini / 1927”); Aldeno (TN), drains, [45.97° N, 11.09° E], 27.VIII.1944, L. Tamanini leg., brach., CLT ( Tamanini 1946: “Aldeno, canali di scolo, 27/III [...] f. a. [=forma attera: apterous morph; mistake with the brachypterous morph]”; Rizzotti Vlach and Zerbini 1989: “Aldeno”; Bacchi and Rizzotti Vlach 2005, 2007: “TN / Aldeno / Coll. Tamanini / 1944”); Avio (TN), [45.73° N, 10.94° E], 3.IV.1928, A. Brasavola de Massa leg., brach., MCVR ( Tamanini 1946: “Avio, Moie, 3/IV, l. [=legit] Bras. [Alb. Brasavola de Massa, Avio [...] f. a. [=forma attera]”; Rizzotti Vlach and Zerbini 1989: “Avio”; Bacchi and Rizzotti Vlach 2005, 2007 “TN / Ávio, Moie / Coll. Mus. Civ. St. Nat. Verona / 1928”); Nomi (TN), Adige Vecchio, [45.926° N, 11.070° E], 25.III.1946, L. Tamanini leg., brach., CLT ( Tamanini 1946: “Nomi, Adige vecchio, 25/III [...] f. a. [=forma attera]”; Bacchi and Rizzotti Vlach 2005, 2007: “TN / Nomi, Fiume Ádige / Coll. Tamanini / 1948 [?]”); Fiume Adige, 1946, A. Servadei leg., CAS ( Servadei 1967: “Trentino-Alto Adige: [...] Servadei!”; Rizzotti Vlach and Zerbini 1989: “Nomi”; Bacchi and Rizzotti Vlach 2005, 2007: “TN / Nomi, Fiume Ádige / Coll. Servadei / 1946”). Veneto: Altavilla Vicentina (VI), Valle Tramontana, [45.48° N, 11.48° E], 1991, CGT ( Bacchi and Rizzotti Vlach 2005, 2007: “VI / Altavilla Vicentina, Valle Tramontana / Coll. Tescari / 1991”); Mossano (VI), Palù, [45.42° N, 11.56° E], 1983, CFB ( Bacchi and Rizzotti Vlach 2005, 2007: “VI / Mossano / Mossano, Palù / Coll. Buzzetti / 1983”). Friuli-Venezia Giulia: Gorizia, [45.94° N, 13.60° E], SYNTYPE /S, HNHM ( Horváth 1899: “ Austria: Goricia”; Andersen 1995: “IT [= Italy] (Goricia)”; Aukema et al. 2013: “IT [= Italy] (Goricia)”). Emilia-Romagna: Rolo (MO), Coccapana, [44.891° N, 10.876° E], 1997, CIB ( Bacchi and Rizzotti Vlach 2005, 2007: “RE / Rolo, località Coccapana / Coll. Bacchi / 1997”); Caorso (PC), [45.05° N, 9.87° E] ( Rizzotti Vlach and Zerbini 1989: “Caorso”; Bacchi and Rizzotti Vlach 2005, 2007: “PC / Caorso / Rizzotti Vlach, Zerbini, 1989 ”).

NEW RECORDS. Lombardy: Ponti sul Mincio (MN), [Fiume Mincio], [ab. 70 m], [45.415° N, 10.715° E], 23.III.1974, A. Zanetti leg., 1 ♀ brach., CPD; Roncoferraro (MN), Barbasso, [45.11° N, 10.90° E], 24.IV.1984, P. Cornacchia leg., 1 ♀ brach., CNBFVR. Tuscany: Montignoso (MS), Fossa Fiorentina (tributary channel of the Lago di Porta), 2 m, 43.992° N, 10.170° E, 3.VII.2014, F. Cianferoni, L. Lastrucci & L. Dell’Olmo leg., 1 ♂ brach. ( Fig. 1 ), CFC.

Nomenclatural remarks. According to Stichel (1955), the gender of the genus name Hydrometra is masculine rather than feminine; and consequently the name of this species should be H. gracilentus Horváth, 1899 rather than Hydrometra gracilenta Horváth, 1899 . This proposed change seems to have been almost entirely overlooked by subsequent authors, and was rarely quoted and however never discussed (e.g., cf. Adlbauer 1979; Tamanini 1989; Andersen 1995; Aukema 2015).

Latreille (1797: 86) described the genus Hydrometra without specifying its gender. Etymologically, the scientific name is composed by the Latin prefix hydro- (from the Greek word ὕδωρ [hýdōr] = ‘water’) and the Greek term Μετρης [-métrēs] = ‘that measures’, so literally “that measures the water” (cf. Oli and Magini 1987); comparable to the Latin word “ gĕōmetrēs, ae ”, a masculine name.

The word “ hydrometra ” did not exist in classical Latin, but in the neo-Latin of the late 18th century, a word ending in “ -a ” was simply considered feminine. According to the International Code of Zoological Nomenclature (ICZN 1999, Art. 30.1.3) “a genus-group name that is a Greek word latinized with change of ending, or with a Latin or latinized suffix, takes the gender normally appropriate to the changed ending or the Latin suffix”.

Finally, P.A. Latreille published his “ Précis des caractères génériques des insectes [...]” at his own expense in 1797 (cf. Michelsen & O’Hara 2014), so the year of description of the genus Hydrometra is here reported as 1797, even if until now it has been incorrectly stated as 1796 (e.g., Andersen 1995; Aukema 2015).

Figures

FIGURE 1. Hydrometra gracilenta Horváth, male from Tuscany. Details of: a) front of the head in dorsal view; b) full head in dorsal view; c) terminal abdomen in left lateral view— (Leica M 205 C stereomicroscope).