Syzeton signatus (Haldeman, 1848) Gompel, 2022

Gompel, Nicolas, 2022, The genus Syzeton Blackburn, 1891 (Coleoptera, Aderidae) in the United States of America, Zootaxa 5162 (3), pp. 243-267 : 266

Syzeton signatus (Haldeman, 1848) , comb. nov.

( Figures 2l ; 3l ; 4f ; 5l )

Euglenes signatus Haldeman, 1848: 97 ;

Lectotype: “ New York, Carolina ” ( MCZC) ( Werner, 1990)

Zonantes signatus (Haldeman, 1848) : Werner (1990)

Material examined. United States. Alabama: Blount County, Highland Lake, (280 m) [33°53’ N 86°25’ W], light trap, 29.VII.2012, T. King leg. (3 ♀♀, FSCA); Dale County, Level Plains [31°17’ N 85°46’ W], black light trap, 6.IV.2015, R. Turnbow leg. (2 ♂♂, FSCA); Dale County, Level Plains [31°17’ N 85°46’ W], black light trap, 24.VI.2015, R. Turnbow leg. (1 ♂, FSCA); Dale County, Level Plains [31°17’ N 85°46’ W], black light trap, 17.III.2016, R. Turnbow leg. (1 ♂, FSCA); Dale County, Level Plains [31°17’ N 85°46’ W], black light trap, 13.V.2016, R. Turnbow leg. (1 ♂, FSCA); Dale County, Level Plains [31°17’ N 85°46’ W], black light trap, 17.VII.2016, R. Turnbow leg. (1 ♀, FSCA). Florida: Alachua County, Gainesville [29°39’ N 82°19’ W], black light trap, 3.XII.1978, M. C. Thomas leg. (1 ♂, FSCA); Alachua County, Gainesville [29°39’ N 82°19’ W], black light trap,. VII.1984, M. J. Plagens leg. (1 ♀, FSCA); Alachua County, Gainesville, San Felasco Hammock Preserve State [29°42’ N 82°27’ W], 15.IX.1988, M. C. Thomas leg. (1 ♂, FSCA); Columbia County, O’Leno State Park, (20 m) [29°55’ N 82°36’ W], 28.IV.1991, R. Turnbow leg. (1 ♂, FSCA); Leon County, Woodville, Natural Wells Road [30°17’ N 84°14’ W], 26.III.2015, M. Haseeb & G. B. Marshall leg. (1 ♂, FSCA). Louisiana: West Feliciana Parish, Nature Conservancy Easement, 15 mi. E of St. Francisville [30°47’40” N 91°15’15” W], Woods near pond, UV, 30.III.2015, M. H. Evans leg. (2 ♀♀ and 1 ♂, WIRC). Missouri: Shannon County, Mark Twain National Forest, 8.4 km S of Birch Tree, (220 m) [36°55’01” N 91°30’33” W], Pine-oak woodland, Beaten from branches of hardwood tree, 23.VIII.2010, J. P. Gruber leg. (1 ♂, WIRC). Oklahoma: Latimer County [34°50’ N 95°18’ W],. X.2002, K. Stephan leg. (1 sp., TAMU). South Carolina : Chesterfield County, Sand Hills State Forest, 6.5 km WNW of Patrick, (100 m) [34°35’12” N 80°06’56” W], Mixed coniferous/hardwood forest, Beaten from branches of Cornus florida , 22.VIII.2011, J. P. Gruber leg. (2 ♂♂, WIRC); Chesterfield County, Sand Hills State Forest, 9.6 km East of Patrick, Parking area of Middendorf Pond [34°32’39” N 80°08’37” W], Forest edge, Beaten from branches of hardwood tree, 22.VIII.2011, J. P. Gruber leg. (1 sp., NGPC). Texas: Brazos County, College Station, Lick Creek Park, (70 m) [30°33’38” N 96°13’03” W], 21.V.2004, E. G. Riley leg. (6 sp., TAMU); Hardin County, Roy E. Larsen Preserve, (20 m) [30°20’ N 94°14’ W], beating burned schrub, 19.IV.1980, J. E. Wappes leg. (1 ♀, FSCA); Sabine County, Sabine National Forest, 12.6 km, ESE of Hemphill [31°16’42” N 93°44’10” W], Mixed hardwood/coniferous forest, Beaten from branches of Quercus sp. , 13.III.2013, J. P. Gruber leg. (1 ♂, WIRC; 2 sp., NGPC), 14.III.2013, J. P. Gruber leg. (1 ♀ and 3 ♂♂, WIRC); San Jacinto County, Sam Houston National Forest, Big Creek Scenic Area [30°30’22” N 95°05’20” W], Mixed hardwood/coniferous forest, Beaten from branches of hardwood tree, 11.III.2013, J. P. Gruber leg. (2 and 10 ♂♂, WIRC; 8 sp., NGPC).

Distribution. United States: Florida to Texas, north to North Carolina and Missouri (extended from Werner (1990)).

Figures

FIGURE 2. Habitus of US Syzeton species. a, Syzeton ouachitanus (Werner, 1990) ♂ from Texas. b, S. fasciatus (Melsheimer 1846) ♂ from Wisconsin. c, S. hubbardi (Casey 1895) ♂ from Oklahoma. d, S. nubifer (LeConte, 1878) ♂ from Texas. e, S. ater (LeConte, 1875) ♂ from Arkansas. f, S. gruberi n. sp. ♂ paratype from Arizona. g, S. arizonae n. sp. ♂ holotype from Arizona. h, S. belovi n. sp. ♂ holotype from Texas. i, S. pallidus (Werner, 1990) ♂ from Texas. j, S. subfasciatus (LeConte, 1855) ♂ from Missouri. k, S. floridanus (Werner, 1990) ♂ from Florida. l, S. signatus (Haldeman, 1848) ♂ from South Carolina. m, S. ouachitanus (Werner, 1990), elytral variation. n, S. hubbardi (Casey 1895), elytral variations, the white lines delinate a ~20º angle between the inner oblique markings. o, S. nubifer (LeConte, 1878), elytral variations, the white lines delinate a ~30–40º angle between the inner oblique markings. Scale bars: 1 mm.

FIGURE 3. ♂ genitalia of US Syzeton species in ventral view (left on all panels) and lateral view (right on all panels, ventral facing to the left). a, Syzeton ouachitanus (Werner, 1990) ♂ from Texas. b, S. fasciatus (Melsheimer 1846) ♂ from Wisconsin. c, S. hubbardi (Casey 1895) ♂ from Oklahoma. d, S. nubifer (LeConte, 1878) ♂ from Texas. e, S. ater (LeConte, 1875) ♂ from Texas. f, S. gruberi n. sp. ♂ paratype from Arizona. g, S. arizonae n. sp. ♂ holotype from Arizona. h, S. belovi n. sp. ♂ holotype from Texas. i, S. pallidus (Werner, 1990) ♂ from Texas. j, S. subfasciatus (LeConte, 1855) ♂ from Missouri. k, S. floridanus (Werner, 1990) ♂ from Florida. l, S. signatus (Haldeman, 1848) ♂ from South Carolina. Note the presence of air bubbles in some of the genitalia presented here. Scale bars: 0.1 mm.

FIGURE 4. Heads of US Syzeton species. a–c and e–g, ♂ heads in frontal view. a, Syzeton arizonae n. sp. ♂ holotype from Arizona. b, S. belovi n. sp. ♂ holotype from Texas. c, S. floridanus (Werner, 1990) ♂ from Florida. d, Syzeton pallidus (Werner, 1990) ♂ from Texas. e, S. signatus (Haldeman, 1848) ♂ from South Carolina. f, S. subfasciatus (LeConte, 1855) ♂ from Mis- souri. Note the difference in interocular space denoted by white double arrows for each species. d and h, ♀ heads in side view. d, S. ater (LeConte, 1875) ♀ from Texas. h, S. ouachitanus (Werner, 1990) ♀ from Mississippi (paratype of Zonantes mississippiensis Werner, 1990). Note the difference in eye size, best seen when comparing the distance from the antennal notch to the edge of the eye, or the space separating the eye from the posterior head margin (white double arrows). Scale bars: 0.1 mm.

FIGURE 5. External morphology of US Syzeton species. a–l, ♂ right foretibia in upper view. a, Syzeton ouachitanus (Werner, 1990) ♂ from Texas. b, S. fasciatus (Melsheimer 1846) ♂ from Wisconsin. c, S. hubbardi (Casey 1895) ♂ from Oklahoma. d, S. nubifer (LeConte, 1878) ♂ from Texas. e, S. ater (LeConte, 1875) ♂ from Texas. f, S. gruberi n. sp. ♂ paratype from Arizona. g, S. arizonae n. sp. ♂ holotype from Arizona. h, S. belovi n. sp. ♂ holotype from Texas. i, S. pallidus (Werner, 1990) ♂ from Texas. j, S. subfasciatus (LeConte, 1855) ♂ from Missouri. k, S. floridanus (Werner, 1990) ♂ from Florida. l, S. signatus (Haldeman, 1848) ♂ from South Carolina.Arrowheads indicate kinks or other modification of the inner side of the tibias; double black arrow denotes the curve of the tibia. m–n, ♀ antennae with details of antennomere 6–8 (inset). m, S. belovi n. sp. ♀ paratype from Texas. n, S. pallidus (Werner, 1990) ♀ from Texas. o, left hind-leg of S. fasciastus (from Wisconsin) in ventral view (arrow indicates the inflated femur). p–q, pubescence on elytral disc. p, S. belovi n. sp. ♂ holotype from Texas. q, S. arizonae n. sp. ♂ holotype from Arizona. Scale bars: 0.1 mm.